WO2022021517A1 - 中心回转接头、液压控制系统和作业车辆 - Google Patents

中心回转接头、液压控制系统和作业车辆 Download PDF

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Publication number
WO2022021517A1
WO2022021517A1 PCT/CN2020/110708 CN2020110708W WO2022021517A1 WO 2022021517 A1 WO2022021517 A1 WO 2022021517A1 CN 2020110708 W CN2020110708 W CN 2020110708W WO 2022021517 A1 WO2022021517 A1 WO 2022021517A1
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WIPO (PCT)
Prior art keywords
oil
port
valve
annular groove
reversing
Prior art date
Application number
PCT/CN2020/110708
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English (en)
French (fr)
Inventor
贺电
谭贤文
耿晓晨
Original Assignee
三一汽车制造有限公司
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Application filed by 三一汽车制造有限公司 filed Critical 三一汽车制造有限公司
Publication of WO2022021517A1 publication Critical patent/WO2022021517A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L39/00—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies
    • F16L39/06—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies of the multiline swivel type, e.g. comprising a plurality of axially mounted modules
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/027—Check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
    • F16L25/01—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means specially adapted for realising electrical conduction between the two pipe ends of the joint or between parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/64—Devices for uninterrupted current collection

Definitions

  • the present application relates to the field of hydraulic technology, and in particular, to a central rotary joint, a hydraulic control system, and a work vehicle.
  • Construction machinery with a slewing mechanism usually includes a fixed part (bottom loading) and a rotating part (top loading), the fixed part does not move, and the rotating part needs to be rotated.
  • the hydraulic oil power source and power supply are generally installed on the fixed part.
  • the hydraulic oil and electrical signals that control the rotary part need to be transmitted from the fixed system to the rotary part.
  • the hydraulic oil is passed through the hose, and the electrical signal uses the wire to transmit the relevant power and signal to the rotating part.
  • the rotating part performs the rotating operation, the hoses and wires connecting the fixed part and the rotating part will be entangled with each other, which makes the hoses and wires easy to damage, and also limits the rotation range of the rotation.
  • the oil groove of the central rotary joint is annular and can only provide one oil passage, which leads to an increase in the overall size of the central rotary joint, and a corresponding increase in the weight and cost of the central rotary joint.
  • the present application aims to solve at least one of the technical problems existing in the prior art.
  • the first aspect of the present application provides a center swivel joint.
  • a second aspect of the present application provides a hydraulic control system.
  • a third aspect of the present application provides yet another hydraulic control system.
  • a fourth aspect of the present application provides a work vehicle.
  • the present application provides a central rotary joint, comprising: a first rotary body, in which a first oil passage and a second oil passage are arranged; a second rotary body, a sleeve Set on the outside of the first rotary body, the second rotary body is rotatably connected with the first rotary body, and the second rotary body is provided with a first oil port and a second oil port; the first annular groove is arranged on the first rotary body and the second rotary body.
  • the second annular groove is arranged between the first revolving body and the second revolving body;
  • the partition plate is arranged between the first annular groove and the second annular groove, and is used to separate the first annular groove from the The second annular groove; wherein the first annular groove and the second annular groove are located on the same radial section of the first rotary body or the second rotary body, and the first oil port is communicated with the first annular groove and the second annular groove.
  • the second oil port communicates with the other of the first annular groove and the second annular groove
  • the first oil passage communicates with one of the first annular groove and the second annular groove
  • the second oil passage communicates with the the other of the first annular groove and the second annular groove.
  • the first oil port on the second rotary body is communicated with one of the first annular groove and the second annular groove
  • the second oil port on the second rotary body is communicated with the first annular groove and the other of the second annular groove.
  • the second rotating body is rotatable relative to the first rotating body, so that the first oil passage communicates with one of the first annular groove and the second annular groove and the second oil passage communicates with the first annular groove and the second annular groove.
  • the first oil passage on the first rotary body can be communicated with one of the first oil port and the second oil port
  • the second oil passage can be communicated with the other of the first oil port and the second oil port .
  • the center rotary joint provided by the present application can be connected to hydraulic oil through the first oil passage and the second oil passage during use, and the hydraulic oil in the first oil passage is supplied to one of the first annular groove and the second annular groove. Alternatively, it is communicated with one of the first oil port and the second oil port through the first annular groove or the second annular groove.
  • the hydraulic oil in the second oil passage is supplied to the other of the first annular groove and the second annular groove, and communicates with the other of the first oil port and the second oil port through the first annular groove or the second annular groove In this way, the output of dual oil circuits can be realized through one central rotary joint, which can reduce the external size of the central rotary joint, especially the axial length of the central rotary joint, and reduce the weight and cost of the central rotary joint.
  • the central rotary joint provided by the present application can also input hydraulic oil in a high pressure state through one of the first oil passage and the second oil passage, and return through the other of the first oil passage and the second oil passage Hydraulic oil.
  • the hydraulic oil is supplied through the first oil passage, the first oil passage is connected to one of the first annular groove and the second annular groove, and the first oil port and the second annular groove are communicated through the first annular groove or the second annular groove.
  • One of the two oil ports is supplied to the hydraulic drive member, and the hydraulic oil in a low pressure state enters the central rotary joint through the other of the first oil port and the second oil port, and communicates with the first annular groove or the second annular groove, through the
  • the second oil passage is discharged, so the supply and return of hydraulic oil can be realized through the setting of a central rotary joint, which can reduce the external size of the central rotary joint, especially the axial length of the central rotary joint, and reduce the central rotary joint.
  • the weight and cost of the joint can be realized through the setting of a central rotary joint, which can reduce the external size of the central rotary joint, especially the axial length of the central rotary joint, and reduce the central rotary joint.
  • central rotary joint in the above-mentioned technical solutions provided by the present application may also have the following additional technical features:
  • first annular groove and the second annular groove are arranged on the inner peripheral surface of the second rotating body, the first oil port is communicated with the first annular groove, and the second oil port is communicated with the second annular groove
  • the first oil passage communicates with one of the first annular groove and the second annular groove, and the second oil passage communicates with the other of the first annular groove and the second annular groove.
  • the first annular groove and the second annular groove are arranged on the outer peripheral surface of the first rotary body, the first oil passage communicates with the first annular groove, the second oil passage communicates with the second annular groove, and the first oil port communicates with the first annular groove.
  • One of the annular groove and the second annular groove, and the second oil port is communicated with the other of the first annular groove and the second annular groove.
  • the arrangement positions of the first annular groove and the second annular groove are further provided.
  • the first oil port on the second rotating body is communicated with the first annular groove
  • the second The oil port communicates with the second annular groove.
  • the second revolving body can rotate relative to the first revolving body, driving the first annular groove and the second annular groove to rotate relative to the first oil passage and the second oil passage of the first revolving body, and the first oil passage communicates with the first annular groove One of the groove and the second annular groove and the second oil passage communicate with the other of the first annular groove and the second annular groove.
  • the first oil passage on the first rotating body communicates with the first annular groove
  • the second oil passage on the first rotating body The channel communicates with the second annular groove
  • the second rotary body can rotate relative to the first rotary body, and drives the first oil port and the second oil port to rotate relative to the first rotary body, and the first oil port is communicated with the first annular groove and the first rotary body.
  • the first annular groove and the second annular groove are multi-layered, and the multi-layered first annular groove and the second annular groove are arranged at intervals along the axis direction of the second rotary body;
  • the first oil port There are a plurality of first oil ports and second oil ports, and the plurality of first oil ports and second oil ports are respectively arranged corresponding to the multi-layer first annular groove and the second annular groove;
  • the first oil passage and the second oil passage are multiple, and the The first oil passages and the second oil passages are divided into multiple groups, and the first annular groove and the second annular groove of the same height are fitted with a set of first oil passages and second oil passages.
  • each layer can provide double oil passages, further reduce the overall size of the central rotary joint, reduce the weight and cost of the central rotary joint, facilitate the installation and layout of the central rotary joint, especially suitable for engineering frame rotating parts narrow installation space between.
  • first annular groove and the second annular groove are provided on the inner peripheral surface of the second rotary body, further comprising: a third oil passage, provided in the first rotary body , the third oil passage is connected to one of the first annular groove and the second annular groove; the fourth oil passage is arranged in the first rotary body, and the fourth oil passage is connected to the first annular groove and the second annular groove.
  • the cross section of the first rotary body is circular, the first oil passage and the second oil passage are symmetrically distributed with the center of the cross section of the first rotary body, and the third oil passage and the fourth oil passage are in the order of the first oil passage.
  • the center of the cross-section of a body of revolution is distributed symmetrically around the center.
  • it further includes: a third oil port, which is arranged in the second rotary body, and the third oil port is communicated with the first half-ring one of the groove and the second annular groove; the fourth oil port is provided in the second rotary body, and the fourth oil port communicates with the other one of the first half-annular groove and the second annular groove; wherein , the cross-section of the second rotary body is annular, the first oil port and the second oil port are symmetrically distributed with the center of the cross-section of the second rotary body, and the third oil port and the fourth oil port are in the shape of the second rotary body.
  • the centers of the cross-sections are distributed symmetrically around the center.
  • the third oil passage and the fourth oil passage are included.
  • the third oil port and the fourth oil port are included.
  • the layout of the first oil passage, the second oil passage, the third oil passage and the fourth oil passage is provided at the same time.
  • the first annular groove and the second annular groove are not connected, and a partition is formed between the first annular groove and the second annular groove.
  • the first oil passage or the second oil passage may be blocked by the partition plate during the rotation of the swing relative to the first swing body, this may result in throttling loss of hydraulic oil.
  • the third oil passage and the first oil passage will not be blocked by the partition at the same time, and the fourth oil passage and the second oil passage will not be blocked by the partition at the same time.
  • the third oil passage can be activated to replace the first oil passage.
  • the fourth oil passage can be activated to avoid the throttling loss of the hydraulic oil in the central rotary joint .
  • the first oil passage and the second oil passage are symmetrically distributed with the center of the cross-section of the first rotary body, and the third oil passage and the fourth oil passage are centered on the center of the cross-section of the first rotary body. symmetrical distribution. It is ensured that the first oil passage is communicated with one of the first annular groove and the second annular groove, the second oil passage is communicated with the other of the first annular groove and the second annular groove, and the third oil passage is ensured to communicate In one of the first annular groove and the second annular groove, the fourth oil passage communicates with the other of the first annular groove and the second annular groove, ensuring the formation of dual oil passages in the central rotary joint.
  • the distance between the third oil passage and the first oil passage is greater than the width of the partition plate
  • the distance between the fourth oil passage and the second oil passage is greater than the width of the partition plate
  • the first rotary body can be cylindrical, and the second rotary body can be annular.
  • the oil port, the first annular groove, the second annular groove, the first oil passage, the second oil passage, the third oil passage and the fourth oil passage are at the same height.
  • a layout mode of the first oil port, the second oil port, the third oil port and the fourth oil port is provided.
  • the first annular groove and the second annular groove are not connected, and a partition is formed between the first annular groove and the second annular groove.
  • the first oil port or the second oil port may be blocked by the diaphragm during the rotation of the swing relative to the first swing body, which may cause throttling loss of hydraulic oil, the third oil port and The first oil port will not be blocked by the diaphragm at the same time.
  • the third oil port can be activated to replace the first oil port, and the fourth oil port and the second oil port will not be blocked by the diaphragm at the same time.
  • the fourth oil port can be activated to avoid the throttling loss of the hydraulic oil in the central rotary joint.
  • the first oil port and the second oil port are symmetrically distributed with the center of the cross-section of the second rotary body, and the third oil port and the fourth oil port are centered on the center of the cross-section of the second rotary body. symmetrical distribution. It is ensured that the first oil port is communicated with one of the first annular groove and the second annular groove, and the second oil port is communicated with the other of the first annular groove and the second annular groove, ensuring that the third oil port is communicated In one of the first annular groove and the second annular groove, the fourth oil port is communicated with the other of the first annular groove and the second annular groove, which ensures the formation of dual oil paths in the central rotary joint.
  • the distance between the third oil port and the first oil port is greater than the width of the partition plate
  • the distance between the fourth oil port and the second oil port is greater than the width of the partition plate, so as to ensure that the third oil port and the second oil port are separated from each other.
  • An oil port will not be blocked by the partition at the same time, so as to ensure that the fourth oil port and the second oil port will not be blocked by the partition at the same time.
  • the first rotary body can be cylindrical, and the second rotary body can be annular.
  • the oil port, the third oil port, the fourth oil port, the first annular groove, the second annular groove, the first oil passage and the second oil passage are at the same height.
  • it further includes: a feeding hole, opened in the first rotary body; and/or a conductive slip ring, arranged on the first rotary body, and the conductive slip ring can be relative to the first rotary body.
  • a feeding hole opened in the first rotary body
  • a conductive slip ring arranged on the first rotary body, and the conductive slip ring can be relative to the first rotary body.
  • Rotation an electrical wiring harness hole, opened in the first revolving body, the electrical wiring harness can be connected to the conductive slip ring through the electrical wiring harness hole; and/or a mounting slot, opened on the first revolving body or the second revolving body, located in the first annular body
  • a mounting slot opened on the first revolving body or the second revolving body, located in the first annular body
  • the opening of the feeding hole is further included to facilitate the material conveying through the feeding hole, and the material can be water or concrete and other materials that can be conveyed through the hole.
  • a conductive slip ring and an electrical wiring harness hole are further included, and the transmission of electrical signals is facilitated by the arrangement of the conductive slip ring and the electrical wiring harness hole.
  • the conductive slip ring is coaxially arranged on the upper part of the first rotating body, The conductive slip ring is capable of rotating around the first rotary body.
  • Conductive wires are arranged on the inner circumference of the conductive slip ring. Each conductive wire and the corresponding conductive wire harness maintain electrical contact during the relative rotation of the conductive slip ring and the first rotary body.
  • an installation groove and a sealing member are further included.
  • the first annular groove and the second annular groove can be sealed to avoid the loss of hydraulic oil, so that the central rotary joint can be used Safer.
  • a hydraulic control system which includes: the central rotary joint of any of the above technical solutions;
  • the oil port, the second valve port of the reversing device is connected to the second oil port;
  • the hydraulic drive part, the oil inlet of the hydraulic drive part is connected to the third valve port of the reversing device, and the oil outlet of the hydraulic drive part is connected to the changer to the fourth valve port of the device.
  • the hydraulic control system provided by the application can use the two oil circuits formed in the central rotary joint as the oil supply circuit and the oil return circuit respectively, and the setting of the reversing device ensures that during the rotation of the second rotary body of the central rotary joint, the The oil circuit is always connected to the oil inlet of the hydraulic drive part, and the oil return circuit is always connected to the oil return port of the hydraulic drive part.
  • the first oil passage of the central rotary joint is used as the oil inlet passage, and the supplied high-pressure hydraulic oil passes through the central rotary joint and then passes through the first oil passage of the central rotary joint.
  • One of the first oil port or the second oil port enters the reversing device, and after passing through the reversing device, it enters the hydraulic drive member through the third valve port of the reversing device, and the second rotary body of the central rotary joint rotates, and the first
  • the reversing device changes the direction to ensure the change
  • the third valve port to the device is the output valve port of the hydraulic oil in a high pressure state.
  • the second oil passage of the central rotary joint is used as the oil inlet passage, and the supplied high-pressure hydraulic oil passes through the central rotary joint and then passes through the second oil passage of the central rotary joint.
  • One of the first oil port or the second oil port enters the reversing device, and after passing through the reversing device, it enters the hydraulic drive member through the third valve port of the reversing device, and the second rotary body of the central rotary joint rotates, and the first When the communication state between the second oil passage and the first oil port or the second oil port changes, and the second oil passage communicates with the other one of the first oil port or the second oil port, the reversing device is reversed to ensure the change of direction.
  • the third valve port to the device is the output valve port of the hydraulic oil in a high pressure state.
  • a reversing valve of the hydraulic driving element may also be arranged between the hydraulic driving element and the reversing device, so as to control the direction in which the hydraulic oil is supplied to the hydraulic driving element to deliver the hydraulic oil.
  • the hydraulic control system because the hydraulic control system includes the central rotary joint of any of the above technical solutions, the hydraulic control system has all the beneficial technical effects of the above-mentioned central rotary joint.
  • hydraulic control system in the second aspect provided by the present application may also have the following additional technical features:
  • the reversing device is a two-position four-way electromagnetic reversing valve; or the reversing device is a two-position four-way hydraulic control reversing valve; or the reversing device includes: a first oil supply circuit, a second One end of an oil supply circuit is connected to the first valve port, and the other end is connected to the third valve port.
  • the first oil supply circuit is provided with a first one-way valve, and the inlet of the first one-way valve is connected to the first valve port; the second In the oil supply line, one end of the second oil supply line is connected to the second valve port, and the other end is connected to the third valve port.
  • the second oil supply line is provided with a second one-way valve, and the inlet of the second one-way valve is connected to The second valve port; the first oil return circuit, one end of the first oil return circuit is connected to the first valve port, and the other end is connected to the fourth valve port, the first oil return circuit is provided with a third one-way valve, the third one-way valve
  • the inlet of the valve is connected to the fourth valve port; the second oil return circuit, one end of the second oil return circuit is connected to the second valve port, the other end is connected to the fourth valve port, and the second oil return circuit is provided with a fourth check valve , the inlet of the fourth one-way valve is communicated with the fourth valve port.
  • the specific type of the reversing device is further provided, and the reversing device may be a two-position four-way electromagnetic reversing valve, a two-position four-way hydraulic control reversing valve or a one-way valve bridge structure.
  • the reversing device is a two-position four-way electromagnetic reversing valve or a two-position four-way hydraulic-controlled reversing valve
  • the reversing of the two-position four-way electromagnetic reversing valve or the two-position four-way hydraulic control reversing valve can Make sure that the third valve port of the reversing device is the output valve port of the hydraulic oil under high pressure.
  • the one-way valve bridge structure when the reversing device is a one-way valve bridge structure, the one-way valve bridge structure includes a first oil supply circuit, a second oil supply circuit, a first oil return circuit and a second oil return circuit.
  • a first check valve is arranged on the oil supply line
  • a second check valve is arranged on the second oil supply line
  • a third check valve is arranged on the first oil return line
  • a fourth check valve is arranged on the second oil return line.
  • the high-pressure hydraulic oil supplied via one of the first oil passage or the second oil passage can only be supplied to the routing port of the hydraulic drive through the first oil supply circuit or the second oil supply circuit through the central rotary joint, and the hydraulic drive
  • the low-pressure hydraulic oil returned from the piece can only be returned to the other one of the first and second oil return lines of the central swivel joint through the first oil return line or the second oil return line.
  • first annular groove and the second annular groove are provided on the second rotary body, and the first rotary body is also provided with a third oil passage and a fourth oil passage, and the third oil passage is provided on the first rotary body.
  • the oil passage further comprises: a third reversing valve, The first actuating valve port of the third reversing valve is connected to the first oil passage, and the second actuating valve port of the third reversing valve is connected to the third oil passage; the fourth reversing valve, the first The execution valve port is connected to the second oil passage, and the second execution valve port of the fourth reversing valve is connected to the fourth oil passage; wherein, the oil inlet valve port of the fourth reversing valve or the oil inlet valve of the third reversing valve The port is connected to the oil source; the first sensor is connected to the first oil passage and the third oil passage for acquiring the first oil pressure information in the first oil passage and the third oil passage; the second sensor is connected to the first oil passage and the third oil passage The second oil channel and the fourth oil channel are used to obtain the second oil
  • the second rotary body is also provided with a third oil port and a fourth oil port, and the third oil port is connected to the first annular groove and the second oil port.
  • a fifth reversing valve which is arranged between the central rotary joint and the reversing device.
  • the first execution valve port of the fifth reversing valve is communicated with the first oil port
  • the second execution valve port of the fifth reversing valve is communicated with the third oil port
  • the oil outlet valve port of the fifth reversing valve is communicated with the The first valve port of the reversing device
  • the sixth reversing valve is arranged between the central rotary joint and the reversing device, the first execution valve port of the sixth reversing valve is connected to the second oil port, and the sixth reversing valve
  • the second executive valve port of the 1st valve is connected to the fourth oil port
  • the oil outlet valve port of the sixth reversing valve is connected to the second valve port of the reversing device
  • the third sensor is connected to the first oil port and the third oil port , used to obtain the third oil pressure information in the first oil port and the third oil port
  • the fourth sensor connected to the second oil port and the fourth oil port, used to obtain the information of the second oil port and the fourth oil port
  • the engineering vehicle when the central rotary joint includes a third oil passage and a fourth oil passage, the engineering vehicle includes a third reversing valve, a fourth reversing valve, a first sensor, a second sensor and first controller.
  • the first sensor is used to obtain the first oil pressure information in the first oil passage and the third oil passage.
  • the first oil pressure information is abnormal, it can be considered that the first oil passage or the third oil passage in the current state One is blocked by the partition between the first annular groove and the second annular groove.
  • the third reversing valve can be controlled by the first controller to change the working state of the first oil passage and the third oil passage.
  • the other of the first oil passage or the third oil passage is communicated with the first annular groove and the second annular groove to avoid throttling loss.
  • the second sensor is used to obtain the second oil pressure information in the second oil passage and the fourth oil passage.
  • the second oil pressure information is abnormal, it can be considered that the current state of the second oil passage or the fourth oil passage One is blocked by the partition between the first annular groove and the second annular groove.
  • the fourth reversing valve can be controlled by the first controller to change the working state of the second oil passage and the fourth oil passage.
  • the other of the second oil passage or the fourth oil passage is communicated with the first annular groove and the second annular groove to avoid throttling loss.
  • the construction vehicle when the central rotary joint includes a third oil port and a fourth oil port, the construction vehicle includes a fifth reversing valve, a sixth reversing valve, a third sensor, a fourth sensor and second controller.
  • the third sensor is used to obtain the third oil pressure information in the first oil port and the third oil port.
  • the third oil pressure information is abnormal, it can be considered that the first oil port or the third oil port in the current state One is blocked by the partition between the first annular groove and the second annular groove.
  • the fifth reversing valve can be controlled by the first controller to change the working state of the first oil port and the third oil port.
  • the other one of the first oil port or the third oil port is communicated with the first annular groove and the second annular groove to avoid throttling loss.
  • the fourth sensor is used to obtain the fourth oil pressure information in the second oil port and the fourth oil port.
  • the fourth oil pressure information is abnormal, it can be considered that the second oil port in the current state or the fourth oil port in the fourth oil port is abnormal.
  • One is blocked by the partition between the first annular groove and the second annular groove.
  • the sixth reversing valve can be controlled by the second controller to change the working state of the second oil port and the fourth oil port.
  • the other one of the second oil port or the fourth oil port is communicated with the first annular groove and the second annular groove to avoid throttling loss.
  • another hydraulic control system comprising: the center rotary joint of any of the above technical solutions; , the second valve port of the reversing device is connected to the second oil passage; the hydraulic drive part, the oil inlet of the hydraulic drive part is connected to the third valve port of the reversing device, and the oil outlet of the hydraulic drive part is connected to the reversing device the fourth valve port.
  • the hydraulic control system provided by the application can use the two oil circuits formed in the central rotary joint as the oil supply circuit and the oil return circuit respectively, and the setting of the reversing device ensures that during the rotation of the second rotary body of the central rotary joint, the The oil circuit is always connected to the oil inlet of the hydraulic drive part, and the oil return circuit is always connected to the oil return port of the hydraulic drive part.
  • the first oil port of the central rotary joint is used as the oil inlet passage, and the supplied high-pressure hydraulic oil passes through the central rotary joint and then passes through the first oil port of the central rotary joint.
  • One of the first oil passage or the second oil passage enters the reversing device, and after passing through the reversing device, it enters the hydraulic drive member through the third valve port of the reversing device, and the second rotary body of the central rotary joint rotates, and the first
  • the reversing device changes the direction to ensure the change of direction.
  • the third valve port to the device is the output valve port of the hydraulic oil in a high pressure state.
  • the second oil port of the central rotary joint is used as the oil inlet passage, and the supplied high-pressure hydraulic oil passes through the central rotary joint and then passes through the third oil inlet.
  • One of the first oil passage or the second oil passage enters the reversing device, and after passing through the reversing device, it enters the hydraulic drive member through the third valve port of the reversing device, and the second rotary body of the central rotary joint rotates, and the first
  • the reversing device changes the direction to ensure the change
  • the third valve port to the device is the output valve port of the hydraulic oil in a high pressure state.
  • a reversing valve of the hydraulic driving element may also be arranged between the hydraulic driving element and the reversing device, so as to control the direction in which the hydraulic oil is supplied to the hydraulic driving element to deliver the hydraulic oil.
  • the work vehicle in the technical solution provided by the third aspect of the present application may also have the following additional technical features:
  • the reversing device is a two-position four-way electromagnetic reversing valve; or the reversing device is a two-position four-way hydraulic control reversing valve; or the reversing device includes: a first oil supply circuit, a second One end of an oil supply circuit is connected to the first valve port, and the other end is connected to the third valve port.
  • the first oil supply circuit is provided with a first one-way valve, and the inlet of the first one-way valve is connected to the first valve port; the second In the oil supply line, one end of the second oil supply line is connected to the second valve port, and the other end is connected to the third valve port.
  • the second oil supply line is provided with a second one-way valve, and the inlet of the second one-way valve is connected to The second valve port; the first oil return circuit, one end of the first oil return circuit is connected to the first valve port, and the other end is connected to the fourth valve port, the first oil return circuit is provided with a third one-way valve, the third one-way valve
  • the inlet of the valve is connected to the fourth valve port; the second oil return circuit, one end of the second oil return circuit is connected to the second valve port, the other end is connected to the fourth valve port, and the second oil return circuit is provided with a fourth check valve , the inlet of the fourth one-way valve is communicated with the fourth valve port.
  • the specific type of the reversing device is further provided, and the reversing device may be a two-position four-way electromagnetic reversing valve, a two-position four-way hydraulic control reversing valve or a one-way valve bridge structure.
  • the reversing device is a two-position four-way electromagnetic reversing valve or a two-position four-way hydraulic-controlled reversing valve
  • the reversing of the two-position four-way electromagnetic reversing valve or the two-position four-way hydraulic control reversing valve can Make sure that the third valve port of the reversing device is the output valve port of the hydraulic oil under high pressure.
  • the one-way valve bridge structure when the reversing device is a one-way valve bridge structure, the one-way valve bridge structure includes a first oil supply circuit, a second oil supply circuit, a first oil return circuit and a second oil return circuit.
  • a first check valve is arranged on the oil supply line
  • a second check valve is arranged on the second oil supply line
  • a third check valve is arranged on the first oil return line
  • a fourth check valve is arranged on the second oil return line.
  • the high-pressure hydraulic oil supplied via one of the first oil passage or the second oil passage can only be supplied to the routing port of the hydraulic drive through the first oil supply circuit or the second oil supply circuit through the central rotary joint, and the hydraulic drive
  • the low-pressure hydraulic oil returned from the piece can only be returned to the other one of the first and second oil return lines of the central swivel joint through the first oil return line or the second oil return line.
  • the first annular groove and the second annular groove are provided on the second rotary body, and the first rotary body is also provided with a third oil passage and a fourth oil passage, and the third oil passage is provided on the first rotary body.
  • the oil passage communicates with one of the first annular groove and the second annular groove
  • the fourth oil passage communicates with the other of the first annular groove and the second annular groove
  • the oil passage further includes: a seventh reversing valve, It is arranged between the central rotary joint and the reversing device.
  • the first execution valve port of the seventh reversing valve is connected to the first oil passage, the second execution valve port of the seventh reversing valve is connected to the third oil passage, and the seventh reversing valve is connected to the third oil passage.
  • the oil outlet valve port of the reversing valve is connected to the first valve port of the reversing device;
  • the eighth reversing valve is arranged between the central rotary joint and the reversing device, and the first executive valve port of the eighth reversing valve is connected to the The second oil passage, the second execution valve port of the eighth reversing valve is connected to the fourth oil passage, the oil outlet valve port of the eighth reversing valve is connected to the second valve port of the reversing device;
  • the fifth sensor is connected to the first oil passage and the third oil passage are used to obtain the fifth oil pressure information in the first oil passage and the third oil passage;
  • the sixth sensor is connected to the second oil passage and the fourth oil passage to obtain the information of the fifth oil pressure in the first oil passage and
  • the second rotary body is also provided with a third oil port and a fourth oil port, and the third oil port is connected to the first annular groove and the second oil port.
  • the fourth oil port is communicated with the other of the first annular groove and the second annular groove, it further includes: a ninth reversing valve, a first execution valve of the ninth reversing valve The port is connected to the first oil port, the second execution valve port of the ninth reversing valve is connected to the third oil port; the tenth reversing valve, the first execution valve port of the tenth reversing valve is connected to the second oil port, The second execution valve port of the tenth reversing valve is connected to the fourth oil port; the seventh sensor is connected to the first oil port and the third oil port for obtaining the seventh oil port in the first oil port and the third oil port Oil pressure information; wherein, the oil inlet valve port of the ninth
  • the engineering vehicle when the central rotary joint includes the third oil passage and the fourth oil passage, the engineering vehicle includes a seventh reversing valve, an eighth reversing valve, a fifth sensor, a sixth sensor and third controller.
  • the fifth sensor is used to acquire fifth oil pressure information in the first oil passage and the third oil passage.
  • the fifth oil pressure information is abnormal, it can be considered that the first oil passage or the third oil passage in the current state One is blocked by the partition between the first annular groove and the second annular groove.
  • the seventh reversing valve can be controlled by the third controller to change the working state of the first oil passage and the third oil passage.
  • the other of the first oil passage or the third oil passage is communicated with the first annular groove and the second annular groove to avoid throttling loss.
  • the sixth sensor is used to obtain the sixth oil pressure information in the second oil passage and the fourth oil passage.
  • the sixth oil pressure information is abnormal, it can be considered that the second oil passage in the current state or the fourth oil passage in the fourth oil passage is abnormal.
  • One is blocked by the partition between the first annular groove and the second annular groove.
  • the third controller can control the direction of the eighth reversing valve to change the working state of the second oil passage and the fourth oil passage.
  • the other of the second oil passage or the fourth oil passage is communicated with the first annular groove and the second annular groove to avoid throttling loss.
  • the engineering vehicle when the central rotary joint includes a third oil port and a fourth oil port, the engineering vehicle includes a ninth reversing valve, a tenth reversing valve, a seventh sensor, an eighth sensor and Fourth controller.
  • the seventh sensor is used to obtain seventh oil pressure information in the first oil port and the third oil port.
  • the seventh oil pressure information is abnormal, it can be considered that the first oil port or the third oil port in the current state One is blocked by the partition between the first annular groove and the second annular groove.
  • the ninth reversing valve can be controlled by the fourth controller to change the working state of the first oil port and the third oil port.
  • the other one of the first oil port or the third oil port is communicated with the first annular groove and the second annular groove to avoid throttling loss.
  • the eighth sensor is used to acquire the eighth oil pressure information in the second oil port and the fourth oil port.
  • the eighth oil pressure information is abnormal, it can be considered that the second oil port or the fourth oil port in the current state One is blocked by the partition between the first annular groove and the second annular groove.
  • the tenth reversing valve can be controlled by the fourth controller to change the working state of the second oil port and the fourth oil port.
  • the other one of the second oil port or the fourth oil port is communicated with the first annular groove and the second annular groove to avoid throttling loss.
  • a work vehicle comprising: a hydraulic oil pump; the hydraulic control system of any of the above-mentioned embodiments; the hydraulic oil pump is communicated with the first oil passage or the second oil passage of the central rotary joint through an oil supply passage ; or the hydraulic oil pump is connected to the oil inlet valve port of the fourth reversing valve or the oil inlet valve port of the third reversing valve through the oil supply path; or the hydraulic oil pump is connected to the first oil port of the central rotary joint through the oil supply path or The second oil port; or the hydraulic oil pump is connected to the oil inlet valve port of the ninth reversing valve or the oil inlet valve port of the tenth reversing valve through the oil supply circuit; the actuator is connected to the hydraulic driving element.
  • the work vehicle provided by the present application has all the beneficial technical effects of the hydraulic control system provided by the work vehicle provided by the present application because the work vehicle includes the above-mentioned hydraulic control system.
  • the work vehicle may be an excavator, a crane, a pump truck, or other vehicles with rotating parts.
  • the work vehicle in the technical solution provided by the fourth aspect of the present application may also have the following additional technical features:
  • a first reversing valve which is arranged on the oil supply road, and the hydraulic oil pump is communicated with the oil inlet valve port of the first reversing valve, wherein the first reversing valve performs the first The valve port is connected to the first oil passage, and the second execution valve port of the first reversing valve is connected to the second oil passage; or the first execution valve port of the first reversing valve is connected to the oil inlet valve of the fourth reversing valve
  • the second actuator port of the first reversing valve is connected to the oil inlet valve port of the third reversing valve; or the first actuator valve port of the first reversing valve is connected to the first oil port, and the first reversing valve
  • the second executive valve port of the first reversing valve is connected to the second oil port; or the first executive valve port of the first reversing valve is connected to the oil inlet valve port of the ninth reversing valve, and the second executive valve port of the first reversing
  • a first reversing valve, a rotary motor and a second reversing valve are further included.
  • the hydraulic oil output by the hydraulic oil pump can be supplied to one of the first oil passage and the second oil passage in the central rotary joint through the first reversing valve, and the hydraulic oil can be supplied to one of the first oil passage and the second oil passage in the central rotary joint through the first reversing valve.
  • the low-pressure hydraulic oil returned by the other in the second oil passage is returned to the oil tank through the first reversing valve; through the setting of the swing motor and the second reversing valve, the first actuator valve that can supply high-pressure hydraulic oil to the swing motor through the hydraulic oil pump
  • the port can drive the swing motor to rotate, and the second actuator valve port of the swing motor via the swing motor can be returned to the oil tank through the second actuator valve port of the second reversing valve.
  • the rotary motor can drive the second rotary body of the central rotary joint to rotate relative to the first rotary body, so as to provide a power source for the central rotary joint.
  • the third reversing valve of the hydraulic control system is arranged between the first reversing valve and the central rotary joint.
  • the oil inlet valve port of the third reversing valve is connected to the first actuating valve port of the first reversing valve
  • the first actuating valve port of the third reversing valve is connected to the first oil passage
  • the second The execution valve port is communicated with the third oil passage.
  • the fourth reversing valve of the hydraulic control system is arranged between the first reversing valve and the central rotary joint.
  • the oil inlet valve port of the fourth reversing valve is communicated with the second execution valve port of the first reversing valve.
  • the first execution valve port of the reversing valve is communicated with the second oil passage
  • the second execution valve port of the fourth reversing valve is communicated with the fourth oil passage.
  • Figure 1a shows a schematic structural diagram of a center rotary joint provided according to an embodiment of the present application
  • Fig. 1b is a sectional view in the direction AA in Fig. 1a;
  • Figure 2a shows a schematic structural diagram of a center rotary joint provided according to another embodiment of the present application
  • Fig. 2b is a sectional view in the direction of AA in Fig. 2a;
  • Figure 3a shows a schematic structural diagram of a center rotary joint provided according to another embodiment of the present application.
  • Figure 3b is a cross-sectional view in the direction AA in Figure 3a;
  • Figure 4a shows a schematic structural diagram of a center rotary joint provided according to still another embodiment of the present application.
  • Figure 4b is a cross-sectional view in the direction AA in Figure 3a;
  • FIG. 5 shows a schematic structural diagram of a hydraulic control system provided according to an embodiment of the third aspect of the present application.
  • FIG. 6 shows a schematic structural diagram of a hydraulic control system provided according to another embodiment of the third aspect of the present application.
  • Fig. 7 shows a schematic structural diagram of a hydraulic control system provided according to yet another embodiment of the third aspect of the present application.
  • Fig. 8 shows a schematic structural diagram of a hydraulic control system provided according to yet another embodiment of the third aspect of the present application.
  • FIG. 9 shows a schematic structural diagram of a hydraulic control system provided according to an embodiment of the fourth aspect of the present application.
  • Fig. 10 shows a schematic structural diagram of a hydraulic control system provided according to another embodiment of the fourth aspect of the present application.
  • Fig. 11 shows a schematic structural diagram of a hydraulic control system provided according to yet another embodiment of the fourth aspect of the present application.
  • Fig. 12 shows a schematic structural diagram of a hydraulic control system provided according to yet another embodiment of the fourth aspect of the present application.
  • Fig. 13 shows a schematic structural diagram of a work vehicle provided according to an embodiment of the present application.
  • FIG. 14 shows a schematic structural diagram of a work vehicle provided according to yet another embodiment of the present application.
  • first oil passage 202 second oil passage, 204 third oil passage, 206 fourth oil passage, 402 first oil port, 404 second oil port, 406 third oil port, 408 fourth oil port;
  • center swivel joint 100 The center swivel joint 100 , the hydraulic control system 200 , and the work vehicle 300 according to some embodiments of the present application are described below with reference to FIGS. 1 a to 14 .
  • the present application provides a central rotary joint 100, comprising: a first rotary body 2, a second rotary body 4, a first annular groove 6 and The second annular groove 8 .
  • a first oil passage 201 and a second oil passage 202 are arranged in the first revolving body 2 ; the second revolving body 4 is sleeved on the outside of the first revolving body 2 , and the second revolving body 4 and the first revolving body 2 can be opposed to each other.
  • the second rotary body 4 is provided with a first oil port 402 and a second oil port 404;
  • the first annular groove 6 is provided on the second rotary body 4 and is located at the connection between the first rotary body 2 and the second rotary body 4 side, the first oil port 402 is communicated with the first annular groove 6;
  • the second annular groove 8 is provided on the second rotary body 4 and is located on the connecting side of the first rotary body 2 and the second rotary body 4, and the second oil port 404 communicated with the second annular groove 8 .
  • the first oil passage 201 communicates with one of the first annular groove 6 and the second annular groove 8
  • the second oil passage 202 communicates with the other of the first annular groove 6 and the second annular groove 8 .
  • the first oil port 402 on the second rotary body 4 is communicated with the first annular groove 6, and the second oil port 404 on the second rotary body 4 is communicated with the first oil port 404 on the second rotary body 4.
  • the second rotary body 4 can rotate relative to the first rotary body 2 , and drives the first annular groove 6 and the second annular groove 8 to rotate relative to the first oil passage 201 and the second oil passage 202 of the first rotary body 2 .
  • the oil passage 201 communicates with one of the first annular groove 6 and the second annular groove 8, and the second oil passage 202 communicates with the other of the first annular groove 6 and the second annular groove 8, so that the first rotary body 2
  • the first oil passage 201 above can communicate with one of the first oil port 402 and the second oil port 404
  • the second oil passage 202 can communicate with the other of the first oil port 402 and the second oil port 404 .
  • one central rotary joint 100 forms two oil passages, which can reduce the external dimension of the central rotary joint 100 , especially the axial length of the central rotary joint 100 , and reduce the weight and cost of the central rotary joint 100 .
  • the central rotary joint 100 provided by the present application can be connected to hydraulic oil through the first oil passage 201 and the second oil passage 202 during use, and the hydraulic oil in the first oil passage 201 is supplied to the first oil passage 201.
  • One of the annular groove 6 and the second annular groove 8 is communicated with one of the first oil port 402 and the second oil port 404 through the first annular groove 6 or the second annular groove 8 .
  • the hydraulic oil in the second oil passage 202 is supplied to the other one of the first annular groove 6 and the second annular groove 8 , and communicates with the first oil port 402 and the second annular groove through the first annular groove 6 or the second annular groove 8
  • the other one of the oil ports 404 can be set in this way to realize the output of dual oil circuits through one central rotary joint 100, which can reduce the external dimension of the central rotary joint 100, especially the axial length of the central rotary joint 100. The weight and cost of the center swivel joint 100 is eliminated.
  • the central rotary joint 100 provided by the present application can also input hydraulic oil in a high pressure state through one of the first oil passage 201 and the second oil passage 202 during use, and pass through the first oil passage.
  • the other of 201 and the second oil passage 202 returns hydraulic oil.
  • hydraulic oil is supplied through the first oil passage 201, the first oil passage 201 communicates with one of the first annular groove 6 and the second annular groove 8, and the first annular groove 6 or the second annular groove 8 communicates with the first annular groove 6 or the second annular groove 8.
  • One of the first oil port 402 and the second oil port 404 is supplied to the hydraulic drive member, and the hydraulic oil in a low pressure state enters the center rotary joint 100 through the other one of the first oil port 402 and the second oil port 404 , It communicates with the first annular groove 6 or the second annular groove 8 and is discharged through the second oil passage 202 .
  • the supply and return of hydraulic oil can be realized through the setting of one central rotary joint 100 , which can reduce the external size of the central rotary joint 100 , especially the axial length of the central rotary joint 100 , and reduce the size of the central rotary joint 100 . weight and cost.
  • FIGS. 1 a and 1 b there are multiple first annular grooves 6 and second annular grooves 8 , and the plurality of first annular grooves 6 and second annular grooves 8 rotate along the second The height direction of the body 4 is spaced apart.
  • each first annular groove 6 is communicated with a first oil port 402, and each second annular groove 8 is communicated with a second oil port 404; wherein, there are multiple first oil passages 201 and second oil passages 202 , the plurality of first oil passages 201 and second oil passages 202 are divided into multiple groups, and the first annular groove 6 and the second annular groove 8 of the same height are fitted with a group of first oil passages 201 and second oil passages 202 .
  • first annular grooves 6 and second annular grooves 8 there are further multiple first annular grooves 6 and second annular grooves 8, and the plurality of first annular grooves 6 and second annular grooves 8 are arranged at intervals along the height direction of the second rotating body 4 so that the center
  • the rotary joint 100 is a multi-layer structure, and each layer can provide dual oil passages.
  • the external dimension of the central rotary joint 100 is further reduced, the weight and cost of the central rotary joint 100 are reduced, the installation and layout of the central rotary joint 100 are facilitated, and it is especially suitable for the narrow installation space between the rotating parts of the engineering frame.
  • FIG. 4a and FIG. 4b it further includes: a third oil passage 204, which is arranged in the first rotary body 2, and the third oil passage 204 is communicated with the first annular groove 6 and one of the second annular groove 8; the fourth oil passage 206 is provided in the first rotary body 2, and the fourth oil passage 206 communicates with the other of the first annular groove 6 and the second annular groove 8 .
  • the cross section of the first revolving body 2 is circular, the first oil passage 201 and the second oil passage 202 are symmetrically distributed around the center of the cross section of the first revolving body 2 , the third oil passage 204 and the fourth oil passage 206 The center of the cross section of the first revolving body 2 is symmetrically distributed.
  • the third oil passage 204 and the fourth oil passage 206 are further included, and the layout of the first oil passage 201 , the second oil passage 202 , the third oil passage 204 and the fourth oil passage 206 is provided. .
  • the first annular groove 6 and the second annular groove 8 are not connected, and a gap is formed between the first annular groove 6 and the second annular groove 8 plate.
  • the first oil passage 201 or the second oil passage 202 may be blocked by the partition plate during the rotation relative to the first rotary body 2, this may cause throttling loss of the hydraulic oil.
  • the third oil passage 204 and the first oil passage 201 will not be blocked by the partition at the same time, and the fourth oil passage 206 and the second oil passage 202 will not be blocked by the partition at the same time
  • the third oil passage 204 can be activated to replace the first oil passage 201
  • the fourth oil passage 206 can be activated to avoid center rotation
  • the hydraulic oil in the joint 100 produces throttling losses.
  • the first oil passages 201 and the second oil passages 202 are distributed symmetrically with the center of the cross section of the first rotary body 2
  • the third oil passages 204 and the fourth oil passages 206 are distributed in the center of the first rotary body 2 .
  • the centers of the cross-sections of the s are distributed symmetrically around the center, which ensures that the first oil passage 201 communicates with one of the first annular groove 6 and the second annular groove 8 .
  • the second oil passage 202 communicates with the other one of the first annular groove 6 and the second annular groove 8, ensuring that the third oil passage 204 communicates with one of the first annular groove 6 and the second annular groove 8.
  • the four oil passages 206 communicate with the other one of the first annular groove 6 and the second annular groove 8 , ensuring the formation of dual oil passages in the central rotary joint 100 .
  • the distance between the third oil passage 204 and the first oil passage 201 is greater than the width of the separator, and the distance between the fourth oil passage 206 and the second oil passage 202 is greater than the width of the separator, ensuring that the third The oil passage 204 and the first oil passage 201 are not blocked by the partition at the same time, so as to ensure that the fourth oil passage 206 and the second oil passage 202 are not blocked by the partition at the same time.
  • the first rotary body 2 may be cylindrical, and the second rotary body 4 may be annular.
  • the first oil The port 402 , the second oil port 404 , the first annular groove 6 , the second annular groove 8 , the first oil passage 201 , the second oil passage 202 , the third oil passage 204 and the fourth oil passage 206 are at the same height.
  • FIG. 4a and FIG. 4b further, it further includes: a feeding hole 10, which is opened in the first rotary body 2; and/or a conductive slip ring 12, which is arranged in the first rotating body 2.
  • the conductive slip ring 12 can rotate relative to the first rotary body 2; an electrical wiring harness hole 14 is opened in the first rotary body 2, and the electrical wiring harness can pass through the electrical wiring harness hole 14 and be connected to the conductive slip ring 12; and /or the installation groove 16 is opened on the second rotary body 4 and located at the top and bottom of the first annular groove 6 and the second annular groove 8 ; the sealing member 18 is arranged in the installation groove 16 .
  • the opening of the feeding hole 10 is further included to facilitate the feeding of materials through the feeding hole 10, and the material may be a material such as water or concrete that can be transported through the hole.
  • a conductive slip ring 12 and an electrical wiring harness hole 14 are further included.
  • the arrangement of the conductive slip ring 12 and the electrical wiring harness hole 14 facilitates the transmission of electrical signals.
  • the conductive slip ring 12 is coaxially arranged in the first
  • the upper part of the revolving body 2 can rotate around the first revolving body 2.
  • Conductive wires are arranged in the axial direction of the inner circumference of the conductive slip ring 12.
  • Each conductive wire and the corresponding conductive wire bundle are connected between the conductive slip ring 12 and the first revolving body. 2 maintain electrical contact during relative rotation.
  • the installation groove 16 and the sealing member 18 are further included.
  • the first annular groove 6 and the second annular groove 8 can be sealed to avoid the loss of hydraulic oil. , making the central rotary joint 100 safer to use.
  • a central rotary joint 100 is provided according to the present application, including: a first rotary body 2 , a second rotary body 4 , and a first annular groove 6 and the second annular groove 8.
  • a first oil passage 201 and a second oil passage 202 are arranged in the first revolving body 2 ; the second revolving body 4 is sleeved on the outside of the first revolving body 2 , and the second revolving body 4 and the first revolving body 2 can be opposed to each other.
  • the second rotary body 4 is provided with a first oil port 402 and a second oil port 404;
  • the first annular groove 6 is provided on the first rotary body 2 and is located at the connection between the first rotary body 2 and the second rotary body 4 side, the first oil passage 201 communicates with the first annular groove 6;
  • the second annular groove 8 is provided on the first rotary body 2, and is located on the connecting side of the first rotary body 2 and the second rotary body 4, and the second oil passage 202 communicated with the second annular groove 8 .
  • the first oil port 402 communicates with one of the first annular groove 6 and the second annular groove 8
  • the second oil port 404 communicates with the other of the first annular groove 6 and the second annular groove 8 .
  • the first oil passage 201 on the first rotary body 2 communicates with the first annular groove 6, and the second oil passage 202 on the first rotary body 2 communicates with the first oil passage 202 on the first rotary body 2.
  • the second rotary body 4 can rotate relative to the first rotary body 2, which drives the first oil port 402 and the second oil port 404 to rotate relative to the first rotary body 2, and the first oil port 402 is connected to the first oil port 402.
  • One of the annular groove 6 and the second annular groove 8 and the second oil port 404 communicate with the other of the first annular groove 6 and the second annular groove 8 .
  • the first oil passage 201 on the first rotary body 2 can be communicated with one of the first oil port 402 and the second oil port 404, and the second oil passage 202 can be communicated with the first oil port 402 and the second oil port
  • the other one of 404 realizes that one central rotary joint 100 forms two oil passages, which can reduce the external dimension of the central rotary joint 100, especially shorten the axial length of the central rotary joint 100, and reduce the size of the central rotary joint 100. weight and cost.
  • the central rotary joint 100 provided by the present application can be connected to hydraulic oil through the first oil passage 201 and the second oil passage 202 during use, and the hydraulic oil in the first oil passage 201 is supplied to the first oil passage 201.
  • the hydraulic oil in the second oil passage 202 is supplied to the second annular groove 8, and the second annular groove 8 can be communicated with the first oil port 402 and the second oil port through the rotation of the second rotary body 4 relative to the first rotary body 2
  • the other one between 404 realizes the output of hydraulic oil.
  • the output of dual oil circuits can be realized through one central rotary joint 100, which can reduce the external size of the central rotary joint 100, especially shorten the axis of the central rotary joint 100.
  • the weight and cost of the central swivel joint 100 are reduced.
  • the center rotary joint 100 provided by the present application can also input hydraulic oil through one of the first oil passage 201 and the second oil passage 202 during use, and pass the first oil passage 201 and the second oil passage 202.
  • the other one of the two oil passages 202 returns hydraulic oil, for example, hydraulic oil is supplied through the first oil passage 201 , and the first oil passage 201 is communicated with the first oil port 402 or the second oil port 404 through the first annular groove 6 .
  • the first oil port 402 or the second oil port 404 communicating with the first oil passage 201 can provide high-pressure hydraulic oil for the hydraulic drive member.
  • the low-pressure hydraulic oil after passing through the hydraulic driving member can be supplied to the first oil port 402 or one of the second oil and the second annular groove 8, so that the low-pressure hydraulic oil is discharged through the second oil passage 202, so that it is arranged through a
  • the installation of the central rotary joint 100 can realize the supply and return of hydraulic oil, which can reduce the external dimension of the central rotary joint 100 , especially the axial length of the central rotary joint 100 , and reduce the weight and cost of the central rotary joint 100 .
  • first annular grooves 6 and second annular grooves 8 there are multiple first annular grooves 6 and second annular grooves 8, and the plurality of first annular grooves 6 and second annular grooves 8 are along the The second revolving body 4 is arranged at intervals in the height direction.
  • each first annular groove 6 is communicated with a first oil passage 201
  • each second annular groove 8 is communicated with a second oil passage 202; wherein, there are multiple first oil ports 402 and second oil ports 404 , the plurality of first oil ports 402 and second oil ports 404 are divided into multiple groups, and the first annular groove 6 and the second annular groove 8 of the same height are fitted with a group of first oil ports 402 and second oil ports 404 .
  • each layer can provide double oil passages, which further reduces the external dimension of the central rotary joint 100, reduces the weight and cost of the central rotary joint 100, and facilitates the installation and layout of the central rotary joint 100. , especially suitable for the narrow installation space between the rotating parts of the engineering frame.
  • it further includes: a third oil port, disposed in the second rotary body 4 , the third oil port is communicated with one of the first annular groove 6 and the second annular groove 8 ;
  • the fourth oil port is provided in the second rotary body 4, and the fourth oil port is communicated with the other one of the first annular groove 6 and the second annular groove 8; wherein, the cross section of the second rotary body 4
  • the first oil port 402 and the second oil port 404 are symmetrically distributed at the center of the section of the second rotary body 4
  • the third oil port and the fourth oil port are in the center of the section of the second rotary body 4 . Centrally symmetrical distribution.
  • the third oil port and the fourth oil port are further included, and the layout of the first oil port 402 , the second oil port 404 , the third oil port and the fourth oil port is also provided.
  • the first oil port 402 or the second oil port 404 may be blocked by the partition plate during the rotation relative to the first rotary body 2 . This may cause throttling loss of hydraulic oil, and the third oil port and the first oil port 402 will not be blocked by the partition at the same time.
  • the third oil port can be activated to replace the first oil port
  • the oil port 402, the fourth oil port and the second oil port 404 will not be blocked by the diaphragm at the same time.
  • the fourth oil port can be activated to avoid the hydraulic oil in the center rotary joint 100. produce throttling losses.
  • the first oil port 402 and the second oil port 404 are symmetrically distributed at the center of the cross section of the second rotary body 4 , and the third oil port and the fourth oil port are distributed according to the cross section of the second rotary body 4 .
  • the center of the circle is symmetrically distributed, ensuring that the first oil port 402 is connected to one of the first annular groove 6 and the second annular groove 8, and the second oil port 404 is connected to the first annular groove 6 and the second annular groove 8
  • the other one ensures that the third oil port communicates with one of the first annular groove 6 and the second annular groove 8, and the fourth oil port communicates with the other of the first annular groove 6 and the second annular groove 8.
  • the formation of dual oil paths of the central rotary joint 100 is ensured.
  • the distance between the third oil port and the first oil port 402 is greater than the width of the baffle plate, and the distance between the fourth oil port and the second oil port 404 is greater than the width of the baffle plate, ensuring that the third oil port The first oil port 402 and the first oil port 402 will not be blocked by the partition at the same time, so as to ensure that the fourth oil port and the second oil port 404 will not be blocked by the partition at the same time.
  • the first rotary body 2 may be cylindrical, and the second rotary body 4 may be annular.
  • the first oil The port 402 , the second oil port 404 , the third oil port, the fourth oil port, the first annular groove 6 , the second annular groove 8 , the first oil passage 201 and the second oil passage 202 are at the same height.
  • FIG. 4a and FIG. 4b further, it further includes: a feeding hole 10, which is opened in the first rotary body 2; and/or a conductive slip ring 12, which is arranged in the first rotating body 2.
  • the conductive slip ring 12 can rotate relative to the first rotary body 2; an electrical wiring harness hole 14 is opened in the first rotary body 2, and the electrical wiring harness can pass through the electrical wiring harness hole 14 and be connected to the conductive slip ring 12; and /or the installation groove 16 is opened on the second rotary body 4 and located at the top and bottom of the first annular groove 6 and the second annular groove 8 ; the sealing member 18 is arranged in the installation groove 16 .
  • the opening of the feeding hole 10 is further included to facilitate the feeding of materials through the feeding hole 10, and the material may be a material such as water or concrete that can be transported through the hole.
  • a conductive slip ring 12 and an electrical wiring harness hole 14 are further included.
  • the arrangement of the conductive slip ring 12 and the electrical wiring harness hole 14 facilitates the transmission of electrical signals.
  • the conductive slip ring 12 is coaxially arranged in the first
  • the upper part of the revolving body 2 can rotate around the first revolving body 2.
  • Conductive wires are arranged in the axial direction of the inner circumference of the conductive slip ring 12.
  • Each conductive wire and the corresponding conductive wire bundle are connected between the conductive slip ring 12 and the first revolving body. 2 maintain electrical contact during relative rotation.
  • the installation groove 16 and the sealing member 18 are further included.
  • the first annular groove 6 and the second annular groove 8 can be sealed to avoid the loss of hydraulic oil. , making the central rotary joint 100 safer to use.
  • the present application provides a hydraulic control system 200 , which includes: the central rotary joint 100 provided in any embodiment of the above-mentioned first aspect, or the above-mentioned The center swivel joint 100 , the reversing device 22 and the hydraulic driving member 44 provided in any of the embodiments of the second aspect.
  • the first valve port 226 of the reversing device 22 is connected to the first oil port 402 of the central rotary joint 100 , and the second valve port 228 of the reversing device 22 is connected to the second oil port 404 ;
  • the port is communicated with the third valve port 230 of the reversing device 22 , and the oil outlet of the hydraulic driving member 44 is communicated with the fourth valve port 232 of the reversing device 22 .
  • the hydraulic control system 200 provided by the present application because the hydraulic control system 200 includes the central rotary joint 100 of any embodiment proposed in the first aspect, or the center rotary joint 100 of any embodiment proposed in the second aspect.
  • the central rotary joint 100 therefore, the hydraulic control system 200 provided by the third aspect has all the beneficial technical effects of the above-mentioned central rotary joint 100.
  • the hydraulic control system 200 provided by the present application can use the two oil circuits formed in the central rotary joint 100 as the oil supply circuit and the oil return circuit, and the setting of the reversing device 22 ensures that the central rotary joint 100 has a During the rotation of the second rotary body 4 , the oil supply path is always connected to the oil inlet of the hydraulic driving member 44 , and the oil return path is always connected to the oil return port of the hydraulic driving member 44 .
  • the first oil passage 201 of the central rotary joint 100 is used as the oil inlet passage, and the supplied high-pressure hydraulic oil passes through the center
  • the rotary joint 100 then enters the reversing device 22 through one of the first oil port 402 or the second oil port 404 , and then enters the hydraulic drive member 44 through the third valve port 230 of the reversing device 22 after passing through the reversing device 22 Inside.
  • the communication state between the first oil passage 201 and the first oil port 402 or the second oil port 404 changes, and the first oil passage 201 communicates with the first oil port 402 or the second oil port 404.
  • the direction of the reversing device 22 is reversed to ensure that the third valve port 230 of the reversing device 22 is an output valve port of the hydraulic oil in a high pressure state.
  • the second oil passage 202 of the central rotary joint 100 is used as the oil inlet passage, and the supplied high-pressure hydraulic oil passes through the center
  • the rotary joint 100 then enters the reversing device 22 through one of the first oil port 402 or the second oil port 404 , and then enters the hydraulic drive member 44 through the third valve port 230 of the reversing device 22 after passing through the reversing device 22 Inside.
  • the communication state between the second oil passage 202 and the first oil port 402 or the second oil port 404 changes, and the second oil passage 202 communicates with the first oil port 402 or the second oil port 402.
  • the direction of the reversing device 22 is reversed to ensure that the third valve port 230 of the reversing device 22 is an output valve port of the hydraulic oil in a high pressure state.
  • a hydraulic drive reversing valve 46 may also be provided between the hydraulic drive 44 and the reversing device, so as to control the direction in which the hydraulic oil is supplied to the hydraulic drive 44 to deliver hydraulic oil.
  • the reversing device 22 is a two-position four-way electromagnetic reversing valve 222 ; or as shown in FIG. 7 , the reversing device 22 is a two-position four-way liquid Or as shown in FIG.
  • the reversing device 22 includes: a first oil supply circuit, one end of the first oil supply circuit is connected to the first valve port 226, and the other end is connected to the third valve port 230,
  • the first oil supply path is provided with a first check valve 234 for hydraulic oil to flow to the third valve port 230 through the first valve port 226; in the second oil supply path, one end of the second oil supply line is connected to the second valve
  • the other end of the port 228 is communicated with the third valve port 230
  • the second oil supply path is provided with a second check valve 236 for only hydraulic oil to flow to the third valve port 230 through the second valve port 228 .
  • the first oil return circuit one end of the first oil return circuit is connected to the first valve port 226, and the other end is connected to the fourth valve port 232.
  • the first oil return circuit is provided with only hydraulic oil flowing through the fourth valve port 232 to the first valve port 232.
  • the third one-way valve 238 of the valve port 226; the second oil return circuit, one end of the second oil return circuit is connected to the second valve port 228, and the other end is connected to the fourth valve port 232.
  • the hydraulic oil flows to the fourth check valve 240 of the second valve port 228 via the fourth valve port 232 .
  • the specific type of the reversing device 22 is further provided, and the reversing device 22 may be a two-position four-way electromagnetic reversing valve 222, a two-position four-way hydraulic control reversing valve 224 or a one-way valve bridge structure .
  • the reversing device 22 is the two-position four-way electromagnetic reversing valve 222 or the two-position four-way hydraulic control reversing valve 224
  • the two-position four-way electromagnetic reversing valve 222 or the two-position four-way hydraulic control reversing valve 224 can ensure that the third valve port 230 of the reversing device 22 is an output valve port of the hydraulic oil in a high pressure state.
  • the one-way valve bridge structure includes a first oil supply circuit, a second oil supply circuit, a first oil return circuit and a second oil return circuit, and the first oil supply circuit and the second oil return circuit.
  • a first one-way valve 234 is provided on an oil supply line
  • a second one-way valve 236 is provided on the second oil supply line
  • a third one-way valve 238 is provided on the first oil return line
  • a fourth one-way valve is provided on the second oil return line
  • the one-way valve 240 ensures that the high-pressure hydraulic oil supplied through one of the first oil passage 201 or the second oil passage 202 can only be supplied to the hydraulic pressure through the first oil supply circuit or the second oil supply circuit through the central rotary joint 100
  • the routing port of the driver 44 The low-pressure hydraulic oil returned via the hydraulic drive member 44 can only be returned to the other of the first and second oil return lines of the central swivel joint 100 through the first oil return line or the second oil return line.
  • FIG. 13 it further includes: the first annular groove 6 and the second annular groove 8 are provided on the second rotary body 4 , and the first rotary body 2 is also provided There are a third oil passage 204 and a fourth oil passage 206, the third oil passage 204 is communicated with one of the first annular groove 6 and the second annular groove 8, and the fourth oil passage 206 is communicated with the first annular groove 6 and the second annular groove 8. In the case of the other of the two annular grooves 8.
  • a third reversing valve 34 which is arranged between the first reversing valve 28 and the central rotary joint 100 , and the oil inlet valve port of the third reversing valve 34 is communicated with the first execution valve of the first reversing valve 28
  • the first actuating valve port of the third reversing valve 34 communicates with the first oil passage 201
  • the second actuating valve port of the third reversing valve 34 communicates with the third oil passage 204 .
  • the fourth reversing valve 36 is arranged between the first reversing valve 28 and the central swivel joint 100.
  • the oil inlet valve port of the fourth reversing valve 36 is communicated with the second executive valve port of the first reversing valve 28, and the The first actuating valve port of the four-way valve 36 is communicated with the second oil passage 202 , and the second actuating valve port of the fourth direction valve 36 is communicated with the fourth oil passage 206 .
  • the first sensor 38 is connected to the first oil passage 201 and the third oil passage 204 for acquiring the first oil pressure information in the first oil passage 201 and the third oil passage 204; the second sensor 40 is connected to the first oil passage 201 and the third oil passage 204.
  • the second oil passage 202 and the fourth oil passage 206 are used to obtain the second oil pressure information in the second oil passage 202 and the fourth oil passage 206; the first controller 42 is connected to the first sensor 38 and the second oil passage 206.
  • the sensor 40 and the first controller 42 are used to control the direction change of the third reversing valve 34 when the first oil pressure information is abnormal, and control the direction change of the fourth direction valve 36 when the second oil pressure information is abnormal .
  • the work vehicle 300 when the center swivel joint 100 includes the third oil passage 204 and the fourth oil passage 206 , the work vehicle 300 includes the third reversing valve 34 , the fourth reversing valve 36 , and the first sensor 38.
  • the second sensor 40 and the first controller 42 when the center swivel joint 100 includes the third oil passage 204 and the fourth oil passage 206 , the work vehicle 300 includes the third reversing valve 34 , the fourth reversing valve 36 , and the first sensor 38.
  • the second sensor 40 and the first controller 42 when the center swivel joint 100 includes the third oil passage 204 and the fourth oil passage 206 , the work vehicle 300 includes the third reversing valve 34 , the fourth reversing valve 36 , and the first sensor 38.
  • the first sensor 38 is used to obtain the first oil pressure information in the first oil passage 201 and the third oil passage 204.
  • the first oil pressure information is abnormal, it can be considered that the first oil passage 201 in the current state Or one of the third oil passages 204 is blocked by the partition between the first annular groove 6 and the second annular groove 8.
  • the first controller 42 can control the direction of the third reversing valve 34 to change the direction of the third reversing valve 34.
  • the working state of the first oil passage 201 and the third oil passage 204 makes the other one of the first oil passage 201 or the third oil passage 204 communicate with the first annular groove 6 and the second annular groove 8 to avoid throttling loss .
  • the second sensor 40 is used to obtain the second oil pressure information in the second oil passage 202 and the fourth oil passage 206.
  • the second oil pressure information is abnormal, it can be considered that the second oil passage 202 in the current state Or one of the fourth oil passages 206 is blocked by the baffle plate between the first annular groove 6 and the second annular groove 8.
  • the first controller 42 can control the direction of the fourth reversing valve 36 to change the direction of the fourth reversing valve 36.
  • the working state of the second oil passage 202 and the fourth oil passage 206 makes the other one of the second oil passage 202 or the fourth oil passage 206 communicate with the first annular groove 6 and the second annular groove 8 to avoid throttling loss .
  • the fifth reversing valve is disposed between the central rotary joint 100 and the reversing device 22 , and the first execution valve port of the fifth reversing valve is communicated with the first oil port 402 , the second execution valve port of the fifth reversing valve is communicated with the third oil port, and the oil outlet valve port of the fifth reversing valve is communicated with the first valve port 226 of the reversing device 22 .
  • the sixth reversing valve is arranged between the central rotary joint 100 and the reversing device 22 , the first executive valve port of the sixth reversing valve is communicated with the second oil port 404 , and the second executive valve port of the sixth reversing valve Connected to the fourth oil port, the oil outlet valve port of the fourth reversing valve 36 is connected to the second valve port 228 of the reversing device 22 .
  • the third sensor is connected to the first oil port 402 and the third oil port for acquiring the third oil pressure information in the first oil port 402 and the third oil port;
  • the fourth sensor is connected to the second oil port 404 and the fourth oil port to obtain the fourth oil pressure information in the second oil port 404 and the fourth oil port;
  • the second controller is connected to the third sensor and the fourth sensor, and the second controller is used for When the third oil pressure information is abnormal, the fifth reversing valve is controlled to change direction, and when the fourth oil pressure information is abnormal, the sixth reversing valve is controlled to change direction.
  • the work vehicle 300 when the center swivel joint 100 includes a third oil port and a fourth oil port, the work vehicle 300 includes a fifth reversing valve, a sixth reversing valve, a third sensor, and a fourth sensor controller and second controller.
  • the third sensor is used to obtain the third oil pressure information in the first oil port 402 and the third oil port.
  • the third oil pressure information is abnormal, it can be considered that the first oil port 402 or the third oil pressure in the current state One of the ports is blocked by the partition between the first annular groove 6 and the second annular groove 8.
  • the fifth reversing valve can be controlled by the first controller 42 to change the direction of the first oil port 402 and the third oil port 402.
  • the working state of the oil port makes the other one of the first oil port 402 or the third oil port communicate with the first annular groove 6 and the second annular groove 8 to avoid throttling loss.
  • the fourth sensor is used to acquire the fourth oil pressure information in the second oil port 404 and the fourth oil port.
  • the fourth oil pressure information is abnormal, it can be considered that the second oil port 404 or the fourth oil pressure in the current state One of the ports is blocked by the partition between the first annular groove 6 and the second annular groove 8.
  • the sixth reversing valve can be controlled by the second controller to change the direction of the second oil port 404 and the fourth oil port 404.
  • the working state of the port makes the other one of the second oil port 404 or the fourth oil port communicate with the first annular groove 6 and the second annular groove 8 to avoid throttling loss.
  • the hydraulic control system includes: the central rotary joint 100 provided in any embodiment of the above-mentioned first aspect, or any implementation of any of the above-mentioned second aspect.
  • the central swivel joint 100, the reversing device 22 and the hydraulic drive 44 are provided.
  • the first valve port 226 of the reversing device 22 is connected to the first oil passage 201 of the central rotary joint 100, and the second valve port 228 of the reversing device 22 is connected to the second oil passage 202; the hydraulic drive member 44, hydraulically driven
  • the oil inlet of the hydraulic drive member 44 is communicated with the third valve port 230 of the reversing device 22
  • the oil outlet of the hydraulic driving member 44 is communicated with the fourth valve port 232 of the reversing device 22 .
  • the hydraulic control system 200 can use the two oil circuits formed in the central rotary joint 100 as the oil supply circuit and the oil return circuit, respectively.
  • the oil supply path is always connected to the oil inlet of the hydraulic drive member 44
  • the oil return path is always connected to the oil return port of the hydraulic drive member 44 .
  • the first oil port 402 of the central rotary joint 100 is used as the oil inlet passage, and the supplied high-pressure hydraulic oil passes through the center
  • the rotary joint 100 then enters the reversing device 22 through one of the first oil passage 201 or the second oil passage 202 , and then enters the hydraulic drive member 44 through the third valve port 230 of the reversing device 22 after passing through the reversing device 22 .
  • the second oil port 404 of the central rotary joint 100 is used as the oil inlet passage, and the supplied high-pressure hydraulic oil passes through the center
  • the rotary joint 100 then enters the reversing device 22 through one of the first oil passage 201 or the second oil passage 202 , and then enters the hydraulic drive member 44 through the third valve port 230 of the reversing device 22 after passing through the reversing device 22 .
  • a reversing valve of the hydraulic driving element 44 may also be provided between the hydraulic driving element 44 and the reversing device 22 to control the direction in which the hydraulic oil is supplied to the hydraulic driving element 44 to deliver hydraulic oil.
  • the reversing device 22 is a two-position four-way electromagnetic reversing valve 222 ; or as shown in FIG. 12 , the reversing device 22 is a two-position Four-way hydraulic control reversing valve 224; or as shown in FIG.
  • the reversing device 22 includes: a first oil supply circuit, one end of the first oil supply circuit is connected to the first valve port 226, and the other end is connected to the third valve Port 230, the first oil supply line is provided with a first check valve 234, the inlet of the first check valve 234 is connected to the first valve port 226; the second oil supply line, one end of the second oil supply line is connected to the second oil supply line. The other end of the valve port 228 is connected to the third valve port 230.
  • the second oil supply circuit is provided with a second one-way valve 236, and the inlet of the second one-way valve 236 is connected to the second valve port 228; the first oil return circuit, One end of the first oil return path is connected to the first valve port 226, and the other end is connected to the fourth valve port 232.
  • the first oil return path is provided with a third one-way valve 238, and the inlet of the third one-way valve 238 is connected to the fourth valve port 232.
  • Valve port 232 second oil return circuit, one end of the second oil return circuit is connected to the second valve port 228, and the other end is connected to the fourth valve port 232, the second oil return circuit is provided with a fourth one-way valve 240, the fourth The inlet of the check valve 240 is communicated with the fourth valve port 232 .
  • the specific type of the reversing device 22 is further provided, and the reversing device 22 may be a two-position four-way electromagnetic reversing valve 222, a two-position four-way hydraulic control reversing valve 224 or a one-way valve bridge structure .
  • the reversing device 22 is the two-position four-way electromagnetic reversing valve 222 or the two-position four-way hydraulic control reversing valve 224
  • the two-position four-way electromagnetic reversing valve 222 or the two-position four-way hydraulic control reversing valve 224 can ensure that the third valve port 230 of the reversing device 22 is an output valve port of the hydraulic oil in a high pressure state.
  • the one-way valve bridge structure includes a first oil supply circuit, a second oil supply circuit, a first oil return circuit and a second oil return circuit, and the first oil supply circuit and the second oil return circuit.
  • a first one-way valve 234 is provided on an oil supply line
  • a second one-way valve 236 is provided on the second oil supply line
  • a third one-way valve 238 is provided on the first oil return line
  • a fourth one-way valve is provided on the second oil return line
  • the one-way valve 240 ensures that the high-pressure hydraulic oil supplied through one of the first oil passage 201 or the second oil passage 202 can only be supplied to the hydraulic pressure through the first oil supply circuit or the second oil supply circuit through the central rotary joint 100
  • the routing port of the driving member 44, the low-pressure hydraulic oil returned via the hydraulic driving member 44 can only be returned to the first oil return circuit and the second oil return circuit of the central rotary joint 100 through the first oil return circuit or the second oil return circuit of the other.
  • the first annular groove 6 and the second annular groove 8 are provided on the second rotary body 4
  • a third rotary body 2 is further provided on the first rotary body 2
  • the fourth oil passage 206 communicates with the first annular groove 6 and the second annular groove
  • it also includes: a seventh reversing valve, which is arranged between the central rotary joint 100 and the reversing device 22, and the first execution valve port of the seventh reversing valve is communicated with the first oil passage 201, the second execution valve port of the seventh reversing valve is connected to the third oil passage 204, the oil outlet valve port of the seventh reversing valve is connected to the first valve port 226 of the reversing device 22; the eighth reversing valve, It is arranged between the central rotary joint 100 and the reversing device 22, and the first execution valve port of the seventh revers
  • the first actuator valve port of the eighth reversing valve is communicated with the second oil passage 202, and the second actuator valve port of the eighth reversing valve is communicated with the fourth oil passage.
  • the oil outlet valve port of the eighth reversing valve is connected to the second valve port 228 of the reversing device 22;
  • the fifth sensor is connected to the first oil passage 201 and the third oil passage 204 for obtaining the first oil
  • the sixth sensor connected to the second oil channel 202 and the fourth oil channel 206, is used to obtain the information in the second oil channel 202 and the fourth oil channel 206
  • the third controller is connected to the fifth sensor and the sixth sensor, and the third controller is used to control the seventh reversing valve when the fifth oil pressure information is abnormal.
  • the eighth reversing valve is controlled to change direction.
  • the first annular groove 6 and the second annular groove 8 are provided on the first rotary body 2, and the second rotary body 4 is also provided with a third oil port 406 and a fourth oil port 408, and the third oil port 406 is connected to the One of the first annular groove 6 and the second annular groove 8, when the fourth oil port 408 is communicated with the other of the first annular groove 6 and the second annular groove 8, further includes: a ninth reversing direction Valve 54, the first actuator port of the ninth reversing valve 54 is connected to the first oil port 402, and the second actuator port of the ninth reversing valve 54 is connected to the third oil port 406; the tenth reversing valve 56, The first actuating valve port of the tenth reversing valve 56 is connected to the second oil port 404, the second actuating valve port of the tenth reversing valve 56 is connected to the fourth oil port 408, and the
  • the oil port 402 and the third oil port 406 are used to obtain the seventh oil pressure information in the first oil port 402 and the third oil port 406; wherein, the oil inlet valve port of the ninth reversing valve 54 or the tenth reversing direction
  • the oil inlet valve port of the valve 56 is connected to the oil source;
  • the eighth sensor 50 is connected to the second oil port 404 and the fourth oil port 408 for obtaining the eighth oil in the second oil port 404 and the fourth oil port 408 oil pressure information;
  • the fourth controller 52 is connected to the seventh sensor and the eighth sensor, and the fourth controller 52 is used to control the ninth reversing valve 54 to change direction when the seventh oil pressure information is abnormal.
  • the tenth selector valve 56 is controlled to change direction.
  • the construction vehicle when the central rotary joint 100 includes the third oil passage 204 and the fourth oil passage 206 , the construction vehicle includes a seventh reversing valve, an eighth reversing valve, a fifth sensor, a sixth reversing valve, and a sixth reversing valve. sensor and third controller.
  • the fifth sensor is used to obtain fifth oil pressure information in the first oil passage 201 and the third oil passage 204.
  • the fifth oil pressure information is abnormal, it can be considered that the first oil passage 201 or the One of the three oil passages 204 is blocked by the partition between the first annular groove 6 and the second annular groove 8 .
  • the seventh reversing valve can be controlled by the third controller to change the direction of the first oil passage 201 . and the working state of the third oil passage 204, so that the other one of the first oil passage 201 or the third oil passage 204 communicates with the first annular groove 6 and the second annular groove 8 to avoid throttling loss.
  • the sixth sensor is used to acquire the sixth oil pressure information in the second oil passage 202 and the fourth oil passage 206.
  • the sixth oil pressure information is abnormal, it can be considered that the second oil passage 202 or the first oil passage in the current state One of the four oil passages 206 is blocked by the partition between the first annular groove 6 and the second annular groove 8 .
  • the third controller can control the direction of the eighth reversing valve to change the second oil passage 202 and the working state of the fourth oil passage 206, so that the second oil passage 202 or the fourth oil passage 206 communicates with the first annular groove 6 and the second annular groove 8 to avoid throttling loss.
  • the construction vehicle when the central rotary joint 100 includes the third oil port 406 and the fourth oil port 408 , the construction vehicle includes the ninth reversing valve 54 , the tenth reversing valve 56 , and the seventh sensor 48 , an eighth sensor 50 and a fourth controller 52 .
  • the seventh sensor 48 is used to obtain seventh oil pressure information in the first oil port 402 and the third oil port 406 .
  • the seventh oil pressure information is abnormal, it can be considered that the first oil port 402 in the current state is Or one of the third oil ports 406 is blocked by the partition between the first annular groove 6 and the second annular groove 8.
  • the ninth reversing valve 54 can be controlled by the fourth controller 52 to change direction to change the The working state of the first oil port 402 and the third oil port 406 makes the other one of the first oil port 402 or the third oil port 406 communicate with the first annular groove 6 and the second annular groove 8 to avoid throttling. loss.
  • the eighth sensor 50 is used to obtain the eighth oil pressure information in the second oil port 404 and the fourth oil port 408.
  • the eighth oil pressure information is abnormal, it can be considered that the second oil port 404 in the current state Or one of the fourth oil ports 408 is blocked by the partition plate between the first annular groove 6 and the second annular groove 8.
  • the tenth reversing valve 56 can be controlled by the fourth controller 52 to change the direction to change the The working state of the second oil port 404 and the fourth oil port 408 makes the other one of the second oil port 404 or the fourth oil port 408 communicate with the first annular groove 6 and the second annular groove 8 to avoid throttling. loss.
  • a work vehicle 300 is provided according to the present application, including: the hydraulic control system 200 provided in any of the above embodiments, a hydraulic oil pump 24 and an actuator 26.
  • the hydraulic oil pump 24 is connected to the first oil passage 201 or the second oil passage 202 of the central rotary joint 100 through the oil supply path; or as shown in FIG. 13 , the hydraulic oil pump 24 is connected to the fourth reversing valve 36 through the oil supply path
  • the oil inlet valve port or the oil inlet valve port of the third reversing valve 34; or the hydraulic oil pump 24 is connected to the first oil port 402 or the second oil port 404 of the central rotary joint 100 through the oil supply circuit; or as shown in FIG.
  • the hydraulic oil pump 24 is connected to the oil inlet valve port of the ninth reversing valve 54 or the oil inlet valve port of the tenth reversing valve 56 through the oil supply path;
  • the work vehicle 300 provided by the present application because the work vehicle 300 includes the above-mentioned hydraulic control system 200 , the work vehicle 300 provided by the present application has all the beneficial technical effects of the hydraulic control system 200 .
  • the work vehicle 300 may be an excavator, a crane, a pump truck, or other vehicles with rotating parts.
  • FIG. 13 and FIG. 14 it further includes: a first reversing valve 28 , which is arranged on the oil supply road, and the hydraulic oil pump 24 is connected to the inlet of the first reversing valve 28 .
  • the oil valve port, the first actuating valve port of the first reversing valve 28 is connected to the first oil passage 201
  • the second actuating valve port of the first reversing valve 28 is connected to the second oil passage 202 ; and/or the rotary motor 30 , which is communicated with the hydraulic oil pump 24 through the driving oil passage.
  • the second reversing valve 32, the hydraulic oil pump 24 is connected to the oil inlet valve port of the second reversing valve 32, the first actuating valve port of the second reversing valve 32 is connected to the first actuating valve port of the swing motor 30, and the swing motor
  • the second execution valve port of 30 is communicated with the second execution valve port of the second reversing valve 32 .
  • a first reversing valve 28 a swing motor 30 and a second reversing valve 32 are further included.
  • the setting of the first reversing valve 28 enables the hydraulic oil output from the hydraulic oil pump 24 to be supplied to one of the first oil passage 201 and the second oil passage 202 in the central rotary joint 100 through the first reversing valve 28 .
  • the low-pressure hydraulic oil returned through the other of the first oil passage 201 and the second oil passage 202 is returned to the oil tank through the first reversing valve 28; by the setting of the swing motor 30 and the second reversing valve 32, the hydraulic The oil pump 24 supplies the high-pressure hydraulic oil to the first actuator valve port of the swing motor 30, which can drive the swing motor 30 to rotate, and the second actuator valve port of the swing motor 30 through the swing motor 30 can pass the second actuator valve The valve port returns to the tank.
  • an embodiment of the present application provides a central rotary joint 100 , as shown in FIGS. 1 a and 1 b , the central rotary joint 100 includes a second rotary body 4 , a first rotary body 2 , the seal 18, wherein the first revolving body 2 and the second revolving body 4 are relative concepts, that is, the first revolving body 2 can be kept fixed with the supporting part of the work vehicle or construction machinery, or can be kept fixed with the slewing part of the construction machinery .
  • the second rotary body 4 is provided with a first oil port 402, a second oil port 404, a first annular groove 6 and a second annular groove 8, and multi-layer oil ports and annular grooves can be distributed as needed (Fig. 1a and Fig. 1b).
  • the first oil port 402 and the second oil port 404 are distributed on the periphery of the second rotary body 4 .
  • the first annular groove 6 and the second annular groove 8 are connected to the first oil port 402 and the The second oil port 404 is in fixed communication.
  • the first rotary body 2 is provided with a first oil passage 201 and a second oil passage 202 .
  • the first oil passage 201 and the second oil passage 202 on the same layer and the first annular grooves 6 and 6 on the same layer on the second rotary body 4 are provided.
  • the second annular grooves 8 communicate with each other in a fixed manner.
  • the first annular groove 6 and the second annular groove 8 on the second rotating body 4 switch oil passages communicating with the first rotating body 2 according to the rotating position.
  • the second rotary body 4 is provided with an annular installation groove 16 of a sealing ring, and a sealing member 18 is installed to prevent oil leakage.
  • the center rotary joint 100 provided in this embodiment is suitable for the annular groove structure provided on the first rotary body 2 , and its structure is shown in FIGS. 2 a and 2 b , and the second rotary body 4 is provided with a first oil
  • the port 402 and the second oil port 404, the second rotary body 4 is a multi-layer structure, and each layer is provided with a group of the first oil port 402 and the second oil port 404.
  • the first revolving body 2 is provided with a first oil passage 201, a second oil passage 202, a first annular groove 6 and a second annular groove 8.
  • the first revolving body 2 is also a multi-layer structure, and the first revolving body 2 has the same layer
  • the first oil passage 201 and the second oil passage 202 respectively communicate with the first annular groove 6 and the second annular groove 8 on the first rotary body 2 .
  • the second oil passage 202 switches the oil port that communicates with the second rotary body 4 according to the rotary position.
  • the first rotary body 2 is provided with an annular installation groove 16 for a sealing ring, and a sealing member 18 is installed to prevent oil leakage.
  • the central rotary joint 100 includes a second rotary body 4 , a first rotary body 2 , and a seal 18 , and the second rotary body 4 is provided with a first oil port 402 , a second rotary body 4
  • the oil port 404 , the first annular groove 6 and the second annular groove 8 , the first oil port 402 and the second oil port 404 are distributed on the periphery of the second rotary body 4 .
  • the first rotary body 2 is a multi-layer structure, and is provided with a plurality of first oil passages 201 and second oil passages 202. The same layer is provided with a first oil passage 201, a second oil passage 202, a third oil passage 204 and a With four oil passages 206, the first oil passage 201 and the third oil passage 204 on the first rotary body 2 will not be blocked by the partition at the same time, and the second oil passage 202 and the fourth oil passage 206 will not be blocked by the partition at the same time.
  • the first annular groove 6 and the second annular groove 8 on the second rotating body 4 switch oil passages communicating with the first rotating body 2 according to the rotating position.
  • a The first oil passage 201 and the second oil passage 202 are symmetrically distributed, and the third oil passage 204 and the fourth oil passage 206 are symmetrically distributed.
  • the second rotary body 4 is provided with an annular installation groove 16 of a sealing ring, and a sealing member 18 is installed to prevent oil leakage.
  • the extension of the central rotary joint 100 in this embodiment can be applied to pump trucks, fire trucks, etc. that need to transport oil, electrical signals, materials (including water, concrete, etc.) at the same time.
  • the central rotary joint 100 includes a second rotary body 4 , a first rotary body 2 , a seal 18 , and a conductive slip ring 12 .
  • a feeding hole 10 is added in the direction of the central axis of the interior of the first rotary body 2, and 10 feeding holes are used for the passage of the feeding pipe; in addition, an electrical wiring harness hole 14 is set in the axial direction, and the electrical wiring harness hole 14 is used for the electrical wiring of the slip ring 12. Harness goes through.
  • the conductive slip ring 12 is coaxially arranged on the upper part of the first revolving body 2 and can rotate around the first revolving body 2.
  • Conductive wires are provided on the inner circumference of the conductive slip ring 12 in the axial direction, and each conductive wire is connected to a corresponding conductive wire harness. The electrical contact is maintained during the relative rotation of the conductive slip ring 12 and the first rotary body 2 .
  • an embodiment of the present application provides a hydraulic control system 200 , which includes the central rotary joint 100 , the reversing device 22 and the hydraulic driving member 44 of any of the above embodiments.
  • the center rotary joint 100 rotates with the second rotary body 4
  • the flow passage on the first rotary body 2 will switch the communication direction with the oil port of the second rotary body 4.
  • the oil passage can realize the supply of high-pressure hydraulic oil and the return of low-pressure hydraulic oil, so a reversing device 22 is provided between the hydraulic driving member 44 and the central rotary joint 100 .
  • the central rotary joint 100 is added on the construction machine to realize that the first oil passage 201 of the central rotary joint 100 on the fixed system is connected with the oil inlet of the hydraulic drive member 44 , and the central rotary joint 100 is located in the fixed system.
  • the second oil passage 202 on the upper part is communicated with the oil outlet of the hydraulic driving member 44 .
  • the central rotary joint 100 and the reversing device 22 can realize this function.
  • the principle is as follows: an inductor is provided on the central rotary joint 100, and the initial state of the central rotary joint 100 is that the first oil passage 201 and the first oil port 402 communicate with each other, The second oil passage 202 communicates with the second oil port 404 , and the initial state of the reversing device 22 is that the first valve port 226 communicates with the third valve port 230 , and the second valve port 228 communicates with the fourth valve port 232 .
  • the sensor detects that the internal oil passages of the central rotary joint 100 lead to reversal, that is, the first oil passage 201 of the central rotary joint 100 communicates with the second oil port 404 , and the second oil passage 202 communicates with the first oil port 402
  • the internal oil passage of the reversing device 22 is connected, that is, the first valve port 226 communicates with the fourth valve port 232 , and the second valve port 228 communicates with the third valve port 230 .
  • the first oil passage 201 of the central rotary joint 100 is communicated with the oil inlet of the hydraulic driving member 44
  • the second oil passage 202 is communicated with the oil return port of the hydraulic driving member 44 .
  • the reversing device 22 may adopt the structure of a two-position four-way electromagnetic reversing valve 222 .
  • the control device 244 of the construction machine controls the solenoid valve to change the electrified state, thereby ensuring that the first oil channel 201 of the central rotary joint 100 is communicated with the oil inlet of the hydraulic drive member 44, and the second oil channel 202 and The oil return port of the hydraulic driving member 44 communicates with each other.
  • the reversing device 22 can adopt a one-way valve bridge structure, the first oil passage 201 is the P port, the second oil passage 202 is the T port, and the high-pressure hydraulic oil enters the central rotary joint from the first oil passage 201 100.
  • the high-pressure hydraulic oil enters the first valve port 226 from the first check valve 234, while the low-pressure hydraulic oil enters the first valve port 226. Oil enters from the fourth valve port 232. Since the first valve port 226 of the reversing device 22 is high pressure, the low-pressure hydraulic oil can only pass from the fourth one-way valve 240 to the second oil port 404 of the central rotary joint 100, and then pass through the first valve port 226 of the reversing device 22.
  • the second oil passage 202 is returned to the oil tank, so that the first oil passage 201 of the central rotary joint 100 is communicated with the oil inlet of the hydraulic driving member 44 , and the second oil passage 202 is communicated with the oil outlet of the hydraulic driving member 44 .
  • the first oil passage 201 communicates with the second oil port 404 and the second oil passage 202 communicates with the first oil port 402
  • the high-pressure hydraulic oil enters the third valve port 230 from the second check valve 236, while the low-pressure hydraulic oil enters the third valve port 230.
  • the low-pressure hydraulic oil can only pass from the third one-way valve 238 to the first oil port 402 of the central rotary joint 100, and then pass through the second The oil passage 202 is formed, so that the first oil passage 201 of the central rotary joint 100 is communicated with the oil inlet of the hydraulic driving member 44 , and the second oil passage 202 is communicated with the oil outlet of the hydraulic driving member 44 .
  • first oil passage 201 of the central rotary joint 100 is the P port (high pressure oil inlet)
  • second oil passage 202 is the T port (low pressure oil return port or low pressure oil drain port)
  • the direction of the oil passage is hydraulic.
  • the oil source goes to the P port of the central rotary joint 100 and then to the hydraulic drive member 44 , and the return oil or drain oil of the hydraulic drive member 44 returns to the oil tank through the T port of the central rotary joint 100 .
  • the first oil passage 201 of the central rotary joint 100 is the P port (high pressure oil inlet)
  • T port low pressure oil return port or low pressure oil drain port
  • the first oil passage 201 is the P port
  • the second oil passage 202 is the T port
  • the high pressure hydraulic oil enters the central rotary joint 100 from the first oil passage 201 , such as the first oil passage 201 and the first oil port 402 is connected, when the second oil passage 202 is connected with the second oil port 404, under the action of high pressure hydraulic oil, the hydraulic control reversing valve is in the left position, at this time the first valve port 226 and the third valve of the reversing device 22
  • the port 230 communicates with the second valve port 228 and the fourth valve port 232, so that the first oil passage 201 of the central rotary joint 100 is communicated with the oil inlet port of the hydraulic drive member 44, and the second oil passage 202 is communicated with the hydraulic drive member 44.
  • the oil outlet is connected.
  • the hydraulic control reversing valve is in the right position, and the reversing device
  • the first valve port 226 of 22 communicates with the fourth valve port 232
  • the second valve port 228 communicates with the third valve port 230, so that the first oil passage 201 of the central rotary joint 100 is communicated with the oil inlet of the hydraulic drive member 44.
  • the second oil passage 202 communicates with the oil outlet of the hydraulic drive member 44 .
  • an embodiment of the present application provides a work vehicle 300, including the hydraulic control system 200 of any of the above-mentioned embodiments, a hydraulic oil pump 24, a first reversing valve 28, a third reversing valve 34, The fourth reversing valve 36 , the actuator 26 , the second reversing valve 32 , the swing motor 30 , the first controller 42 , the first sensor 38 and the second sensor 40 .
  • the first annular groove 6 and the second annular groove 8 of the central rotary joint 100 in the hydraulic control system 200 are provided on the second rotary body 4 , and the first rotary body 2 is further provided with a third oil passage 204 and a fourth oil passage 204 .
  • the oil passage 206, the third oil passage 204 communicate with one of the first annular groove 6 and the second annular groove 8, and the fourth oil passage 206 communicates with the other of the first annular groove 6 and the second annular groove 8 .
  • the third reversing valve 34 and the fourth reversing valve 36 may be two-position three-way reversing valves.
  • the outlet of the hydraulic oil pump 24 communicates with the oil inlet valve port (P port) of the first reversing valve 28, and communicates with the oil inlet valve port of the second reversing valve 32;
  • the execution valve port is in communication with the oil inlet valve port of the third reversing valve 34
  • the second execution valve port of the first reversing valve 28 is in communication with the oil inlet valve port of the fourth reversing valve 36 .
  • the first oil passage 201 of the central rotary joint 100 is communicated with the first actuating valve port of the third reversing valve 34 , and the third oil passage of the central rotary joint 100 is communicated with the second actuating valve port of the third selector valve 34 204 ; the first execution valve port of the fourth reversing valve 36 is communicated with the second oil passage 202 , and the second execution valve port of the fourth reversing valve 36 is communicated with the fourth oil passage 206 .
  • the initial state of the third reversing valve 34 and the fourth reversing valve 36 is that the oil inlet valve port is communicated with the first execution valve port, and the oil inlet valve port is communicated with the first execution valve port when the power is turned on;
  • the first oil port 402 communicates with the first valve port 226 of the reversing device 22 of the hydraulic control system 200 , and the second oil port 404 of the central rotary joint 100 communicates with the second valve port 228 of the reversing device 22 of the hydraulic control system 200 ;
  • the third valve port 230 of the reversing device 22 communicates with the oil inlet of the hydraulic drive 44 of the hydraulic control system 200, and the third valve port 230 of the reversing device 22 communicates with the oil outlet of the hydraulic drive 44;
  • the second The first actuating valve port of the reversing valve 32 is communicated with the first actuating valve port of the swing motor 30
  • the second actuating valve port of the swing motor 30 is communicated with the second actuating
  • the first controller 42 receives the input signals of the first sensor 38 and the second sensor 40 , and outputs control information to control the on-off of the second reversing valve 32 and the reversing of the oil circuit of the reversing device 22 .
  • the first sensor 38 outputs a signal to the first controller 42 when the first oil channel 201 of the dual oil channel concentric rotary joint 100 is blocked by the partition plate, and the second sensor 40 is connected to the second oil channel 202 of the central rotary joint 100 When blocked by the partition, a signal is output to the first controller 42 .
  • the control method of the work vehicle 300 includes the following steps:
  • the first sensor 38 outputs a signal to the first controller 42 when the first oil passage 201 of the central rotary joint 100 is blocked by the partition;
  • the second sensor 40 outputs a signal to the first controller 42 when the second oil passage 202 of the central rotary joint 100 is blocked by the partition plate; it controls the third reversing valve 34 and the fourth reversing valve 36 to lose power, and the third reversing valve 36 is de-energized.
  • the reversing valve 34 and the fourth reversing valve 36 work in the left position.
  • the first valve port 226 of the third reversing valve 34 communicates with the first oil passage 201 of the central rotary joint 100, and the fourth reversing valve 36
  • the second valve port 228 communicates with the second oil passage 202 of the central rotary joint 100, and no throttling loss occurs.
  • the control method contains three flag bits, namely Flag1 for judging that the first sensor 38 is powered, Flag2 for determining that the second sensor 40 is powered, and Flag3 for determining that both the first sensor 38 and the second sensor 40 are powered .
  • the third reversing valve 34 and the fourth reversing valve 36 are controlled to be energized, and the third reversing valve 34 and the fourth reversing valve 36 work at Right position, at this time, the first valve port 226 of the third reversing valve 34 communicates with the third oil passage 204 of the center rotary joint 100 , and the first valve port 226 of the fourth reversing valve 36 is connected with the third oil passage 204 of the center rotary joint 100 .
  • the oil passages 204 communicate with each other, and no throttling loss occurs.
  • the third reversing valve 34 and the fourth reversing valve 36 are controlled not to be energized, and the third reversing valve 34 and the fourth reversing valve 36 work at Left position, at this time, the first valve port 226 of the third reversing valve 34 is in communication with the first oil passage 201 of the central rotary joint 100 , and the first valve port 226 of the fourth reversing valve 36 is connected with the second oil passage of the central rotary joint 100 .
  • the oil passages 202 communicate with each other, and no throttling loss occurs.
  • the value of Flag3 remains unchanged
  • the working position of the reversing device 22 remains unchanged.

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Abstract

一种中心回转接头、液压控制系统和作业车辆，其中，中心回转接头(100)包括：第一回转体(2)，第一回转体(2)内设置有第一油道(201)和第二油道(202)；第二回转体(4)，套设在第一回转体(2)外侧，第二回转体(4)与第一回转体(2)能够相对转动，第二回转体(4)上设置有第一油口(402)和第二油口(404)；第一环形槽(6)，设置在第二回转体(4)上，第一油口(402)连通于第一环形槽(6)；第二环形槽(8)，设置在第二回转体(4)上，第二油口(404)连通于第二环形槽(8)；第一油道(201)连通于第一环形槽(6)和第二环形槽(8)中的一者，第二油道(202)连通于第一环形槽(6)和第二环形槽(8)中的另一者。该中心回转接头(100)形成两个油道，能够减小中心回转接头(100)的外形尺寸，缩短中心回转接头(100)的轴向长度，降低了中心回转接头(100)的重量和成本。

Description

中心回转接头、液压控制系统和作业车辆
本申请要求于2020年07月31日提交中国专利局、申请号为“2020107613257”、发明名称为“中心回转接头、液压控制系统和作业车辆”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及液压技术领域，具体而言，涉及一种中心回转接头、一种液压控制系统和一种作业车辆。
背景技术
带回转机构的工程机械(如挖掘机、起重机、泵车)通常包括固定部分(下装)和回转部分(上装)，固定部分不动，而回转部分需要进行回转作业。液压油动力源、电源一般安装在固定部分上。控制回转部分的液压油、电信号需要从固定系统传送到回转部分。在现有技术中，液压油通过胶管，电信号采用电线传送相关的动力和信号到回转部分。回转部分在进行回转作业时，联接固定部分和回转部分的胶管、电线会相互缠绕，使得胶管和电线容易损坏，同时也限制回转的回转范围。
但随着市场需求的不断变化，工程机械的吨位也逐渐提升，因此整机的液压系统压力和流量也随之增大，所以中心回转接头油路的通径也需要相应增大，现有技术中的中心回转接头油槽为环形仅能提供一个油道，导致中心回转接头的整体外形尺寸增大，中心回转接头的重量和成本也相应增大。
发明内容
本申请旨在至少解决现有技术中存在的技术问题之一。
为此，本申请第一方面提供了一种中心回转接头。
本申请第二方面提供了一种液压控制系统。
本申请第三方面提供了又一种液压控制系统。
本申请第四方面提供了一种作业车辆。
在本申请第一方面的技术方案中，本申请提供了一种中心回转接头，包括：第一回转体，第一回转体内设置有第一油道和第二油道；第二回转体，套设在第一回转体外侧，第二回转体与第一回转体转动连接，第二回转体上设置有第一油口和第二油口；第一环形槽，设置于第一回转体与第二回转体之间；第二环形槽，设置于第一回转体与第二回转体之间；隔板，设置于第一环形槽与第二环形槽之间，用于隔断第一环形槽与第二环形槽；其中，第一环形槽和第二环形槽位于第一回转体或第二回转体的同一径向截面上，第一油口连通于第一环形槽和第二环形槽中的一者，第二油口连通于第一环形槽和第二环形槽中的另一者，第一油道连通于第一环形槽和第二环形槽中的一者，第二油道连通于第一环形槽和第二环形槽中的另一者。
本申请提供的中心回转接头，第二回转体上的第一油口连通于第一环形槽和第二环形槽中的一者，第二回转体上的第二油口连通于第一环形槽和第二环形槽中的另一者。第二回转体能够相对于第一回转体转动，使得第一油道连通于第一环形槽和第二环形槽中的一者第二油道连通于第一环形槽和第二环形槽中的另一者，第一回转体上的第一油道能够连通于第一油口和第二油口中的一者，第二油道能够连通于第一油口和第二油口中的另一者。实现了一个中心回转接头形成两个油道，能够减小中心回转接头的外形尺寸，特别是缩短中心回转接头的轴向长度，降低了中心回转接头的重量和成本。
本申请提供的中心回转接头，在使用过程中，可以通过第一油道和第二油道接入液压油，第一油道的液压油供给至第一环形槽和第二环形槽中的一者，通过第一环形槽或第二环形槽内连通于第一油口和第二油口中的一者。第二油道的液压油供给至第一环形槽和第二环形槽中的另一者，通过第一环形槽或第二环形槽内连通于第一油口和第二油口中的另一者，如此设置即可通过一个中心回转接头实现双油路的输出，能够减小中心回转接头的外形尺寸，特别是缩短中心回转接头的轴向长度，降低了中心回转接头的重量和成本。
本申请提供的中心回转接头，在使用过程中，还可以经由第一油道和第二油道中的一者输入高压状态的液压油，通过第一油道和第二油道中的另一者返回液压油。例如，通过第一油道供给液压油，第一油道连通至第一环形槽和第二环形槽中的一者，通过第一环形槽或第二环形槽内连通于第一油口和第二油口中的一者供给至液压驱动件，低压状态的液压油通过第一油口和第二油口中的另一者进入到中心回转接头，连通于第一环形槽或第二环形槽，通过第二油道排出，如此设置通过一个中心回转接头的设置即可实现液压油的供给与返回，能够减小中心回转接头的外形尺寸，特别是缩短中心回转接头的轴向长度，降低了中心回转接头的重量和成本。
另外，本申请提供的上述技术方案中的中心回转接头还可以具有如下附加技术特征：
在上述技术方案中，进一步地，第一环形槽和第二环形槽设置于第二回转体的内周面上，第一油口连通于第一环形槽，第二油口连通于第二环形槽，第一油道连通于第一环形槽和第二环形槽中的一者，第二油道连通于第一环形槽和第二环形槽中的另一者。或第一环形槽和第二环形槽设置于第一回转体的外周面上，第一油道连通于第一环形槽，第二油道连通第二环形槽，第一油口连通于第一环形槽和第二环形槽中的一者，第二油口连通于第一环形槽和第二环形槽中的另一者。
在该技术方案中，进一步提供了第一环形槽和第二环形槽的设置位置。在第一环形槽和第二环形槽设置于第二回转体的内周面上的情况下，第二回转体上的第一油口连通于第一环形槽，第二回转体上的第二油口连通于第二环形槽。第二回转体能够相对于第一回转体转动，带动第一环形槽和第二环形槽相对于第一回转体的第一油道和第二油道转动，第一油道连通于第一环形槽和第二环形槽中的一者第二油道连通于第一环形槽和第二环形槽中的另一者。在第一环形槽和第二环形槽设置于第一回转体的外周面上的情况下，第一回转体上的第一油道连通于第一环形槽，第一回转体上的第二油道连通于第二环形槽，第二回转体能够相对于第一回转体转动，带动第一油口和第二油口相对于第一回转体转动，第一油口连通于第一环形槽和第二环形槽中的一者。
在上述任一技术方案中，进一步地，第一环形槽和第二环形槽为多层，多层第一环形槽和第二环形槽沿第二回转体的轴线方向间隔设置；第一油口和第二油口为多个，多个第一油口和第二油口分别与多层第一环形槽、第二环形槽对应设置；第一油道和第二油道为多个，多个第一油道和第二油道分为多组，同一高度的第一环形槽和第二环形槽适配有一组第一油道和第二油道。
在该技术方案中，进一步地第一环形槽和第二环形槽为多个，多个第一环形槽和第二环形槽沿第一回转体的高度方向间隔设置，使得中心回转接头为多层结构，每层都可以提供双油道，更进一步地减小中心回转接头的外形尺寸，降低了中心回转接头的重量和成本，便于中心回转接头的安装与布局，特别适用于工程车架转动部件之间狭窄的安装空间。
在上述任一技术方案中，进一步地，在第一环形槽和第二环形槽设置于第二回转体的内周面上的情况下，还包括：第三油道，设置在第一回转体内，第三油道连通于第一环形槽和第二环形槽中的一者；第四油道，设置在第一回转体内，第四油道连通于第一环形槽和第二环形槽中的另一者；其中，第一回转体的截面为圆形，第一油道和第二油道以第一回转体的截面的圆心呈中心对称分布，第三油道和第四油道以第一回转体的截面的圆心呈中心对称分布。或第一环形槽和第二环形槽设置于第一回转体的外周面上的情况下，还包括：第三油口，设置在第二回转体内，第三油口连通于述第一半环形槽和第二环形槽中的一者；第四油口，设置在第二回转体内，第四油口连通于述第一半环形槽和第二环形槽中的另一者的情况下；其中，第二回转体的截面为圆环形，第一油口和第二油口以第二回转体的截面的圆心呈中心对称分布，第三油口和第四油口以第二回转体的截面的圆心呈中心对称分布。
在该技术方案中，在第一环形槽和第二环形槽设置于第二回转体的内周面上的情况下，包括了第三油道和第四油道。在第一环形槽和第二环形槽设置于第一回转体的外周面上的情况下，包括了第三油口和第四油口。
在该技术方案中，在包括第三油道和第四油道的情况下，同时提供了第一油道、第二油道、第三油道和第四油道的布局方式。为了避免液压油 击穿第一环形槽和第二环形槽，确保了第一环形槽和第二环形槽不连通，第一环形槽和第二环形槽之间会形成隔板。考虑到在回转在相对于第一回转体转动的过程中可能会存在第一油道或第二油道被隔板遮挡的情况，这样可能会导致液压油产生节流损失。通过第三油道和第四油道的设置，第三油道和第一油道不会同时被隔板遮挡，第四油道和第二油道不会同时被隔板遮挡，在第一油道被隔板遮挡时，可以启用第三油道代替第一油道，在第二油道被隔板遮挡时，可以启用第四油道，避免中心回转接头内的液压油产生节流损失。
在该技术方案中，通过第一油道和第二油道以第一回转体的截面的圆心呈中心对称分布，第三油道和第四油道以第一回转体的截面的圆心呈中心对称分布。确保了第一油道连通于第一环形槽和第二环形槽中的一者，第二油道连通于第一环形槽和第二环形槽中的另一者，确保了第三油道连通于第一环形槽和第二环形槽中的一者，第四油道连通于第一环形槽和第二环形槽中的另一者，确保了中心回转接头双油路的形成。
具体地，第三油道与第一油道之间间隔的距离大于隔板的宽度，第四油道与第二油道之间间隔的距离大于隔板的宽度，确保第三油道与第一油道不会同时被隔板遮挡，确保第四油道与第二油道不会同时被隔板遮挡。
具体地，为了便于第二回转体相对于第一回转体转动，第一回转体可以为圆柱形，第二回转体可以为圆环形，为了保障油路的连通效果第一油口、第二油口、第一环形槽、第二环形槽、第一油道、第二油道、第三油道和第四油道处于同一高度。
在该技术方案中，在包括了第三油口和第四油口的情况下，提供了第一油口、第二油口、第三油口和第四油口的布局方式。为了避免液压油击穿第一环形槽和第二环形槽，确保了第一环形槽和第二环形槽不连通，第一环形槽和第二环形槽之间会形成隔板。考虑到在回转在相对于第一回转体转动的过程中可能会存在第一油口或第二油口被隔板遮挡的情况，这样可能会导致液压油产生节流损失，第三油口和第一油口不会同时被隔板遮挡，在第一油口被隔板遮挡时，可以启用第三油口代替第一油口，第四油口和第二油口不会同时被隔板遮挡，在第二油口被隔板遮挡时，可以启用 第四油口，避免中心回转接头内的液压油产生节流损失。
在该技术方案中，通过第一油口和第二油口以第二回转体的截面的圆心呈中心对称分布，第三油口和第四油口以第二回转体的截面的圆心呈中心对称分布。确保了第一油口连通于第一环形槽和第二环形槽中的一者，第二油口连通于第一环形槽和第二环形槽中的另一者，确保了第三油口连通于第一环形槽和第二环形槽中的一者，第四油口连通于第一环形槽和第二环形槽中的另一者，确保了中心回转接头双油路的形成。
具体地，第三油口与第一油口之间间隔的距离大于隔板的宽度，第四油口与第二油口之间间隔的距离大于隔板的宽度，确保第三油口与第一油口不会同时被隔板遮挡，确保第四油口与第二油口不会同时被隔板遮挡。
具体地，为了便于第二回转体相对于第一回转体转动，第一回转体可以为圆柱形，第二回转体可以为圆环形，为了保障油路的连通效果第一油口、第二油口、第三油口、第四油口、第一环形槽、第二环形槽、第一油道和第二油道处于同一高度。
在上述任一技术方案中，进一步地，还包括：输料孔，开设在第一回转体内；和/或导电滑环，设置在第一回转体上，导电滑环能够相对于第一回转体转动；电气线束孔，开设在第一回转体内，电气线束能够穿过电气线束孔连接于导电滑环；和/或安装槽，开设在第一回转体或第二回转体上，位于第一环形槽和第二环形槽的顶部和底部；密封件，设置在安装槽内。
在该技术方案中，进一步包括了输料孔的开设便于通过输料孔输送物料，物料可以为水或混凝土等能够通过孔进行输送的物料。
在该技术方案中，进一步包括了导电滑环和电气线束孔，通过导电滑环和电气线束孔的设置便于电气信号的传输，具体地，导电滑环同轴布置在第一回转体的上部，能够绕第一回转体转动，导电滑环的内周的轴线方向上设置有导电丝，每个导电丝与相应的导电线束在导电滑环与第一回转体相对转动的过程中保持电接触。
在该技术方案中，进一步包括了安装槽和密封件，通过安装槽和密封件的设置，能够对第一环形槽和第二环形槽进行密封，避免了液压油的流失，使得中心回转接头使用更为安全。
根据本申请的第二方面，提供了一种液压控制系统，其中，包括：上述任一技术方案的中心回转接头；换向装置，换向装置的第一阀口连通于中心回转接头的第一油口，换向装置的第二阀口连通于第二油口；液压驱动件，液压驱动件的入油口连通于换向装置的第三阀口，液压驱动件的出油口连通于换向装置的第四阀口。
本申请提供的液压控制系统可以将中心回转接头中形成的两条油路分别作为供油路和回油路，通过换向装置的设置确保在中心回转接头的第二回转体转动过程中，供油路始终连通于液压驱动件的入油口，回油路始终连通于液压驱动件的回油口。
例如，在第一环形槽和第二环形槽设置在第二回转体上的情况下，将中心回转接头的第一油道作为进油道，供给的高压状态液压油通过中心回转接头后通过第一油口或第二油口中的一者进入到换向装置，通过换向装置后经过换向装置的第三阀口进入到液压驱动件内，在中心回转接头的第二回转体转动，第一油道与第一油口或第二油口的连通状态发生变化，第一油道连通于第一油口或第二油口中的另一者的情况下，换向装置换向以确保换向装置的第三阀口为高压状态液压油的输出阀口。
例如，在第一环形槽和第二环形槽设置在第一回转体上的情况下，将中心回转接头的第二油道作为进油道，供给的高压状态液压油通过中心回转接头后通过第一油口或第二油口中的一者进入到换向装置，通过换向装置后经过换向装置的第三阀口进入到液压驱动件内，在中心回转接头的第二回转体转动，第二油道与第一油口或第二油口的连通状态发生变化，第二油道连通于第一油口或第二油口中的另一者的情况下，换向装置换向以确保换向装置的第三阀口为高压状态液压油的输出阀口。
具体地，在液压驱动件和换向装置之间还可以设置液压驱动件换向阀，用以控制液压油供给向液压驱动件输送液压油的方向。
本申请第二方面提供的液压控制系统，因液压控制系统包括了上述任一技术方案的中心回转接头，因此液压控制系统具备上述中心回转接头的全部有益技术效果。
另外，本申请提供的第二方面中的液压控制系统还可以具有如下附加 技术特征：
在上述技术方案中，进一步地，换向装置为二位四通电磁换向阀；或换向装置为二位四通液控换向阀；或换向装置包括：第一供油路，第一供油路的一端连通于第一阀口，另一端连通于第三阀口，第一供油路上设置有第一单向阀，第一单向阀的进口连通第一阀口；第二供油路，第二供油管路的一端连通于第二阀口，另一端连通于第三阀口，第二供油路设置有第二单向阀，第二单向阀的进口连通于第二阀口；第一回油路，第一回油路一端连通于第一阀口，另一端连通于第四阀口，第一回油路上设置有第三单向阀，第三单向阀的进口连通于第四阀口；第二回油路，第二回油路一端连通于第二阀口，另一端连通于第四阀口，第二回油路上设置有第四单向阀，第四单向阀的进口连通于第四阀口。
在该技术方案中，进一步提供了换向装置的具体类型，换向装置可以为二位四通电磁换向阀、二位四通液控换向阀或单向阀桥式结构。
具体地，在换向装置为二位四通电磁换向阀或二位四通液控换向阀时，通过二位四通电磁换向阀或二位四通液控换向阀换向能够确保换向装置的第三阀口为高压状态液压油的输出阀口。
具体地，在换向装置为单向阀桥式结构时，单向阀桥式结构包括了第一供油路、第二供油路、第一回油路和第二回油路，第一供油路上设置有第一单向阀，第二供油路上设置有第二单向阀，第一回油路上设置有第三单向阀，第二回油路上设置有第四单向阀，确保经由第一油道或第二油道中的一者供给的高压液压油仅能通过中心回转接头通过了第一供油路或第二供油路供给至液压驱动件的路由口，经由液压驱动件返回的低压液压油仅能够通过第一回油路或第二回油路返回至中心回转接头的第一回油路和第二回油路中的另一者。
在上述任一技术方案中，进一步地，在第一环形槽和第二环形槽设置在第二回转体上，第一回转体上还设置有第三油道和第四油道，第三油道连通于第一环形槽和第二环形槽中的一者，第四油道连通于第一环形槽和第二环形槽中的另一者的情况下，还包括：第三换向阀，第三换向阀的第一执行阀口连通于第一油道，第三换向阀的第二执行阀口连通于第三油道； 第四换向阀，第四换向阀的第一执行阀口连通于第二油道，第四换向阀的第二执行阀口连通于第四油道；其中，第四换向阀的进油阀口或第三换向阀的进油阀口连通于油源；第一感应器，连接于第一油道和第三油道，用以获取第一油道和第三油道内的第一油压信息；第二感应器，连接于第二油道和第四油道，用以获取第二油道和第四油道内的第二油压信息；第一控制器，连接于第一感应器和第二感应器，第一控制器用于在第一油压信息异常的情况下控制第三换向阀换向，在第二油压信息异常的情况下控制第四换向阀换向。或在第一环形槽和第二环形槽设置在第一回转体上，第二回转体上还设置有第三油口和第四油口，第三油口连通于第一环形槽和第二环形槽中的一者，第四油口连通于第一环形槽和第二环形槽中的另一者的情况下，还包括：第五换向阀，设置在中心回转接头和换向装置之间，第五换向阀的第一执行阀口连通于第一油口，第五换向阀的第二执行阀口连通于第三油口，第五换向阀的出油阀口连通于换向装置的第一阀口；第六换向阀，设置在中心回转接头和换向装置之间，第六换向阀的第一执行阀口连通于第二油口，第六换向阀的第二执行阀口连通于第四油口，第六换向阀的出油阀口连通于换向装置的第二阀口；第三感应器，连接于第一油口和第三油口，用以获取第一油口和第三油口内的第三油压信息；第四感应器，连接于第二油口和第四油口，用以获取第二油口和第四油口内的第四油压信息；第二控制器，连接于第三感应器和第四感应器，第二控制器用于在第三油压信息异常的情况下控制第五换向阀换向，在第四油压信息异常的情况下控制第六换向阀换向。
在该技术方案中，在中心回转接头包括第三油道和第四油道的情况下，工程车辆包括了第三换向阀、第四换向阀、第一感应器、第二感应器和第一控制器。
具体地，第一感应器用以获取第一油道和第三油道内的第一油压信息，在第一油压信息异常时，可以认为当前状态下的第一油道或第三油道中的一者被第一环形槽和第二环形槽之间的隔板遮挡，此时可以通过第一控制器控制第三换向阀换向，改变第一油道和第三油道的工作状态，使得第一油道或第三油道中的另一者与第一环形槽和第二环形槽连通，避免出现产 生节流损失。
具体地，第二感应器用以获取第二油道和第四油道内的第二油压信息，在第二油压信息异常时，可以认为当前状态下的第二油道或第四油道中的一者被第一环形槽和第二环形槽之间的隔板遮挡，此时可以通过第一控制器控制第四换向阀换向，改变第二油道和第四油道的工作状态，使得第二油道或第四油道中的另一者与第一环形槽和第二环形槽连通，避免出现产生节流损失。
在该技术方案中，在中心回转接头包括第三油口和第四油口的情况下，工程车辆包括了第五换向阀、第六换向阀、第三感应器、第四感应器和第二控制器。
具体地，第三感应器用以获取第一油口和第三油口内的第三油压信息，在第三油压信息异常时，可以认为当前状态下的第一油口或第三油口中的一者被第一环形槽和第二环形槽之间的隔板遮挡，此时可以通过第一控制器控制第五换向阀换向，改变第一油口和第三油口的工作状态，使得第一油口或第三油口中的另一者与第一环形槽和第二环形槽连通，避免出现产生节流损失。
具体地，第四感应器用以获取第二油口和第四油口内的第四油压信息，在第四油压信息异常时，可以认为当前状态下的第二油口或第四油口中的一者被第一环形槽和第二环形槽之间的隔板遮挡，此时可以通过第二控制器控制第六换向阀换向，改变第二油口和第四油口的工作状态，使得第二油口或第四油口中的另一者与第一环形槽和第二环形槽连通，避免出现产生节流损失。
根据本申请的第三方面提供了又一种液压控制系统，包括：上述任一技术方案的中心回转接头；换向装置，换向装置的第一阀口连通于中心回转接头的第一油道，换向装置的第二阀口连通于第二油道；液压驱动件，液压驱动件的入油口连通于换向装置的第三阀口，液压驱动件的出油口连通于换向装置的第四阀口。
本申请提供的液压控制系统可以将中心回转接头中形成的两条油路分别作为供油路和回油路，通过换向装置的设置确保在中心回转接头的第二 回转体转动过程中，供油路始终连通于液压驱动件的入油口，回油路始终连通于液压驱动件的回油口。
例如，在第一环形槽和第二环形槽设置在第二回转体上的情况下，将中心回转接头的第一油口作为进油道，供给的高压状态液压油通过中心回转接头后通过第一油道或第二油道中的一者进入到换向装置，通过换向装置后经过换向装置的第三阀口进入到液压驱动件内，在中心回转接头的第二回转体转动，第一油口与第一油道或第二油道的连通状态发生变化，第一油道连通于第一油道或第二油道中的另一者的情况下，换向装置换向以确保换向装置的第三阀口为高压状态液压油的输出阀口。
例如，在第一环形槽和第二环形槽设置在第一回转体上的情况下，将中心回转接头的第二油口作为进油道，供给的高压状态液压油通过中心回转接头后通过第一油道或第二油道中的一者进入到换向装置，通过换向装置后经过换向装置的第三阀口进入到液压驱动件内，在中心回转接头的第二回转体转动，第二油口与第一油道或第二油道的连通状态发生变化，第二油口连通于第一油道或第二油道中的另一者的情况下，换向装置换向以确保换向装置的第三阀口为高压状态液压油的输出阀口。
具体地，在液压驱动件和换向装置之间还可以设置液压驱动件换向阀，用以控制液压油供给向液压驱动件输送液压油的方向。
另外，本申请第三方面提供的上述技术方案中的作业车辆还可以具有如下附加技术特征：
在上述技术方案中，进一步地，换向装置为二位四通电磁换向阀；或换向装置为二位四通液控换向阀；或换向装置包括：第一供油路，第一供油路的一端连通于第一阀口，另一端连通于第三阀口，第一供油路上设置有第一单向阀，第一单向阀的进口连通第一阀口；第二供油路，第二供油管路的一端连通于第二阀口，另一端连通于第三阀口，第二供油路设置有第二单向阀，第二单向阀的进口连通于第二阀口；第一回油路，第一回油路一端连通于第一阀口，另一端连通于第四阀口，第一回油路上设置有第三单向阀，第三单向阀的进口连通于第四阀口；第二回油路，第二回油路一端连通于第二阀口，另一端连通于第四阀口，第二回油路上设置有第四 单向阀，第四单向阀的进口连通于第四阀口。
在该技术方案中，进一步提供了换向装置的具体类型，换向装置可以为二位四通电磁换向阀、二位四通液控换向阀或单向阀桥式结构。
具体地，在换向装置为二位四通电磁换向阀或二位四通液控换向阀时，通过二位四通电磁换向阀或二位四通液控换向阀换向能够确保换向装置的第三阀口为高压状态液压油的输出阀口。
具体地，在换向装置为单向阀桥式结构时，单向阀桥式结构包括了第一供油路、第二供油路、第一回油路和第二回油路，第一供油路上设置有第一单向阀，第二供油路上设置有第二单向阀，第一回油路上设置有第三单向阀，第二回油路上设置有第四单向阀，确保经由第一油道或第二油道中的一者供给的高压液压油仅能通过中心回转接头通过了第一供油路或第二供油路供给至液压驱动件的路由口，经由液压驱动件返回的低压液压油仅能够通过第一回油路或第二回油路返回至中心回转接头的第一回油路和第二回油路中的另一者。
在上述任一技术方案中，进一步地，在第一环形槽和第二环形槽设置在第二回转体上，第一回转体上还设置有第三油道和第四油道，第三油道连通于第一环形槽和第二环形槽中的一者，第四油道连通于第一环形槽和第二环形槽中的另一者的情况下，还包括：第七换向阀，设置在中心回转接头和换向装置之间，第七换向阀的第一执行阀口连通于第一油道，第七换向阀的第二执行阀口连通于第三油道，第七换向阀的出油阀口连通于换向装置的第一阀口；第八换向阀，设置在中心回转接头和换向装置之间，第八换向阀的第一执行阀口连通于第二油道，第八换向阀的第二执行阀口连通于第四油道，第八换向阀的出油阀口连通于换向装置的第二阀口；第五感应器，连接于第一油道和第三油道，用以获取第一油道和第三油道内的第五油压信息；第六感应器，连接于第二油道和第四油道，用以获取第二油道和第四油道内的第六油压信息；第三控制器，连接于第五感应器和第六感应器，第三控制器用于在第五油压信息异常的情况下控制第七换向阀换向，在第六油压信息异常的情况下控制第八换向阀换向。或在第一环形槽和第二环形槽设置在第一回转体上，第二回转体上还设置有第三油口 和第四油口，第三油口连通于第一环形槽和第二环形槽中的一者，第四油口连通于第一环形槽和第二环形槽中的另一者的情况下，还包括：第九换向阀，第九换向阀的第一执行阀口连通于第一油口，第九换向阀的第二执行阀口连通于第三油口；第十换向阀，第十换向阀的第一执行阀口连通于第二油口，第十换向阀的第二执行阀口连通于第四油口；第七感应器，连接于第一油口和第三油口，用以获取第一油口和第三油口内的第七油压信息；其中，第九换向阀的进油阀口或第十换向阀的进油阀口连通于油源；第八感应器，连接于第二油口和第四油口，用以获取第二油口和第四油口内的第八油压信息；第四控制器，连接于第七感应器和第八感应器，第四控制器用于在第七油压信息异常的情况下控制第九换向阀换向，在第八油压信息异常的情况下控制第十换向阀换向。
在该技术方案中，在中心回转接头包括第三油道和第四油道的情况下，工程车辆包括了第七换向阀、第八换向阀、第五感应器、第六感应器和第三控制器。
具体地，第五感应器用以获取第一油道和第三油道内的第五油压信息，在第五油压信息异常时，可以认为当前状态下的第一油道或第三油道中的一者被第一环形槽和第二环形槽之间的隔板遮挡，此时可以通过第三控制器控制第七换向阀换向，改变第一油道和第三油道的工作状态，使得第一油道或第三油道中的另一者与第一环形槽和第二环形槽连通，避免出现产生节流损失。
具体地，第六感应器用以获取第二油道和第四油道内的第六油压信息，在第六油压信息异常时，可以认为当前状态下的第二油道或第四油道中的一者被第一环形槽和第二环形槽之间的隔板遮挡，此时可以通第三控制器控制第八换向阀换向，改变第二油道和第四油道的工作状态，使得第二油道或第四油道中的另一者与第一环形槽和第二环形槽连通，避免出现产生节流损失。
在该技术方案中，在中心回转接头包括第三油口和第四油口的情况下，工程车辆包括了第九换向阀、第十换向阀、第七感应器、第八感应器和第四控制器。
具体地，第七感应器用以获取第一油口和第三油口内的第七油压信息，在第七油压信息异常时，可以认为当前状态下的第一油口或第三油口中的一者被第一环形槽和第二环形槽之间的隔板遮挡，此时可以通过第四控制器控制第九换向阀换向，改变第一油口和第三油口的工作状态，使得第一油口或第三油口中的另一者与第一环形槽和第二环形槽连通，避免出现产生节流损失。
具体地，第八感应器用以获取第二油口和第四油口内的第八油压信息，在第八油压信息异常时，可以认为当前状态下的第二油口或第四油口中的一者被第一环形槽和第二环形槽之间的隔板遮挡，此时可以通过第四控制器控制第十换向阀换向，改变第二油口和第四油口的工作状态，使得第二油口或第四油口中的另一者与第一环形槽和第二环形槽连通，避免出现产生节流损失。
根据本申请的第四方面提供了一种作业车辆，包括：液压油泵；上述任一实施例的液压控制系统；液压油泵通过供油路连通于中心回转接头的第一油道或第二油道；或液压油泵通过供油路连通于第四换向阀的进油阀口或第三换向阀的进油阀口；或液压油泵通过供油路连通于中心回转接头的第一油口或第二油口；或液压油泵通过供油路连通于第九换向阀的进油阀口或第十换向阀的进油阀口；执行件，连接于液压驱动件。
本申请提供的作业车辆，因作业车辆包括了上述的液压控制系统，因此本申请提供的作业车辆具备的液压控制系统的全部有益技术效果。
具体地，作业车辆可以为挖掘机、起重机、泵车等其他带有旋转部件的车辆。
另外，本申请第四方面提供的上述技术方案中的作业车辆还可以具有如下附加技术特征：
在上述技术方案中，进一步地，还包括：第一换向阀，设置在供油路上，液压油泵连通于第一换向阀的进油阀口，其中，第一换向阀的第一执行阀口连通于第一油道，第一换向阀的第二执行阀口连通于第二油道；或第一换向阀的第一执行阀口连通于第四换向阀的进油阀口，第一换向阀的第二执行阀口连通于第三换向阀的进油阀口；或第一换向阀的第一执行阀 口连通于第一油口，第一换向阀的第二执行阀口连通于第二油口；或第一换向阀的第一执行阀口连通于第九换向阀的进油阀口，第一换向阀的第二执行阀口连通于第十换向阀的进油阀口；和/或回转马达，通过驱动油路连通于液压油泵，用于驱动第一回转体与第二回转体之间的相对转动；第二换向阀，液压油泵连通于第二换向阀的进油阀口，第二换向阀的第一执行阀口连通于回转马达的第一执行阀口，回转马达的第二执行阀口连通于第二换向阀的第二执行阀口。
在该技术方案中，进一步包括了第一换向阀、回转马达和第二换向阀。通过第一换向阀的设置，能够使得液压油泵输出的液压油通过第一换向阀供给至中心回转接头中第一油道和第二油道中的一者，能够使经由第一油道和第二油道中另一者返回的低压液压油通过第一换向阀返回至油箱；通过回转马达和第二换向阀的设置，能够通过液压油泵向回转马达供给高压液压油的第一执行阀口，能够驱动回转马达转动，经由回转马达的回转马达的第二执行阀口能够通过第二换向阀的第二执行阀口返回至油箱。回转马达能够驱动中心回转接头的第二回转体相对于第一回转体转动，为中心回转接头提供动力源。
具体地，在中心回转接头包括了第三油道和第四油道的情况下，液压控制系统的第三换向阀设置在第一换向阀和中心回转接头之间。第三换向阀的进油阀口连通于第一换向阀的第一执行阀口，第三换向阀的第一执行阀口连通于第一油道，第三换向阀的第二执行阀口连通于第三油道。液压控制系统的第四换向阀，设置在第一换向阀和中心回转接头之间，第四换向阀的进油阀口连通于第一换向阀的第二执行阀口，第四换向阀的第一执行阀口连通于第二油道，第四换向阀的第二执行阀口连通于第四油道。
本申请的附加方面和优点将在下面的描述部分中变得明显，或通过本申请的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1a示出了根据本申请的一个实施例提供的中心回转接头的结构示意 图；
图1b为图1a中AA方向的剖面图；
图2a示出了根据本申请的另一个实施例提供的中心回转接头的结构示意图；
图2b为图2a中AA方向的剖面图；
图3a示出了根据本申请的又一个实施例提供的中心回转接头的结构示意图；
图3b为图3a中AA方向的剖面图；
图4a示出了根据本申请的再一个实施例提供的中心回转接头的结构示意图；
图4b为图3a中AA方向的剖面图；
图5示出了根据本申请的第三方面一个实施例提供的液压控制系统的结构示意图；
图6示出了根据本申请的第三方面另一个实施例提供的液压控制系统的结构示意图；
图7示出了根据本申请的第三方面又一个实施例提供的液压控制系统的结构示意图；
图8示出了根据本申请的第三方面再一个实施例提供的液压控制系统的结构示意图；
图9示出了根据本申请的第四方面一个实施例提供的液压控制系统的结构示意图；
图10示出了根据本申请的第四方面另一个实施例提供的液压控制系统的结构示意图；
图11示出了根据本申请的第四方面又一个实施例提供的液压控制系统的结构示意图；
图12示出了根据本申请的第四方面再一个实施例提供的液压控制系统的结构示意图；
图13示出了根据本申请的一个实施例提供的作业车辆的结构示意图；
图14示出了根据本申请的又一个实施例提供的作业车辆的结构示意图。
其中，图1a至图14中附图标记与部件名称之间的对应关系为：
100中心回转接头，2第一回转体，4第二回转体，6第一环形槽，8第二环形槽，10输料孔，12导电滑环，14电气线束孔，16安装槽，18密封件；
201第一油道，202第二油道，204第三油道，206第四油道，402第一油口，404第二油口，406第三油口，408第四油口；
200液压控制系统，22换向装置，44液压驱动件，46液压驱动件换向阀；
222二位四通电磁换向阀，224二位四通液控换向阀，226第一阀口，228第二阀口，230第三阀口，232第四阀口，234第一单向阀，236第二单向阀，238第三单向阀，240第四单向阀，242感应装置，244控制装置；
300作业车辆，24液压油泵，26执行件，28第一换向阀，30回转马达，32第二换向阀，34第三换向阀，36第四换向阀，38第一感应器，40第二感应器，42第一控制器，48第七感应器，50第八感应器，52第四控制器，54第九换向阀，56第十换向阀。
具体实施方式
为了能够更清楚地理解本申请的上述目的、特征和优点，下面结合附图和具体实施方式对本申请进行进一步地详细描述。需要说明的是，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本申请，但是，本申请还可以采用其他不同于在此描述的其他方式来实施，因此，本申请的保护范围并不受下面公开的具体实施例的限制。
下面参照图1a至图14描述根据本申请一些实施例的中心回转接头100、液压控制系统200和作业车辆300。
在本申请第一方面实施例中，如图1a和图1b所示，本申请提供了一种中心回转接头100，包括：第一回转体2、第二回转体4、第一环形槽6和第二环形槽8。
其中，第一回转体2内设置有第一油道201和第二油道202；第二回转体4套设在第一回转体2外侧，第二回转体4与第一回转体2能够相对转动，第二回转体4上设置有第一油口402和第二油口404；第一环形槽6 设置在第二回转体4上，位于第一回转体2和第二回转体4的连接侧，第一油口402连通于第一环形槽6；第二环形槽8设置在第二回转体4上，位于第一回转体2和第二回转体4的连接侧，第二油口404连通于第二环形槽8。其中，第一油道201连通于第一环形槽6和第二环形槽8中的一者，第二油道202连通于第一环形槽6和第二环形槽8中的另一者。
在该实施例中，本申请提供的中心回转接头100，第二回转体4上的第一油口402连通于第一环形槽6，第二回转体4上的第二油口404连通于第二环形槽8。第二回转体4能够相对于第一回转体2转动，带动第一环形槽6和第二环形槽8相对于第一回转体2的第一油道201和第二油道202转动，第一油道201连通于第一环形槽6和第二环形槽8中的一者第二油道202连通于第一环形槽6和第二环形槽8中的另一者，使得第一回转体2上的第一油道201能够连通于第一油口402和第二油口404中的一者，第二油道202能够连通于第一油口402和第二油口404中的另一者。实现了一个中心回转接头100形成两个油道，能够减小中心回转接头100的外形尺寸，特别是缩短中心回转接头100的轴向长度，降低了中心回转接头100的重量和成本。
在该实施例中，本申请提供的中心回转接头100，在使用过程中，可以通过第一油道201和第二油道202接入液压油，第一油道201的液压油供给至第一环形槽6和第二环形槽8中的一者，通过第一环形槽6或第二环形槽8内连通于第一油口402和第二油口404中的一者。第二油道202的液压油供给至第一环形槽6和第二环形槽8中的另一者，通过第一环形槽6或第二环形槽8内连通于第一油口402和第二油口404中的另一者，如此设置即可通过一个中心回转接头100实现双油路的输出，能够减小中心回转接头100的外形尺寸，特别是缩短中心回转接头100的轴向长度，降低了中心回转接头100的重量和成本。
在该实施例中，本申请提供的中心回转接头100，在使用过程中，还可以经由第一油道201和第二油道202中的一者输入高压状态的液压油，通过第一油道201和第二油道202中的另一者返回液压油。例如，通过第一油道201供给液压油，第一油道201连通至第一环形槽6和第二环形槽 8中的一者，通过第一环形槽6或第二环形槽8内连通于第一油口402和第二油口404中的一者供给至液压驱动件，低压状态的液压油通过第一油口402和第二油口404中的另一者进入到中心回转接头100，连通于第一环形槽6或第二环形槽8，通过第二油道202排出。如此设置通过一个中心回转接头100的设置即可实现液压油的供给与返回，能够减小中心回转接头100的外形尺寸，特别是缩短中心回转接头100的轴向长度，降低了中心回转接头100的重量和成本。
在本申请的一个实施例中，如图1a和图1b所示，第一环形槽6和第二环形槽8为多个，多个第一环形槽6和第二环形槽8沿第二回转体4的高度方向间隔设置。其中，每个第一环形槽6连通于一个第一油口402，每个第二环形槽8连通于一个第二油口404；其中，第一油道201和第二油道202为多个，多个第一油道201和第二油道202分为多组，同一高度的第一环形槽6和第二环形槽8适配有一组第一油道201和第二油道202。
在该实施例中，进一步地第一环形槽6和第二环形槽8为多个，多个第一环形槽6和第二环形槽8沿第二回转体4的高度方向间隔设置，使得中心回转接头100为多层结构，每层都可以提供双油道。更进一步地减小中心回转接头100的外形尺寸，降低了中心回转接头100的重量和成本，便于中心回转接头100的安装与布局，特别适用于工程车架转动部件之间狭窄的安装空间。
在本申请的一个实施例中，如图4a和图4b所示，进一步地，还包括：第三油道204，设置在第一回转体2内，第三油道204连通于第一环形槽6和第二环形槽8中的一者；第四油道206，设置在第一回转体2内，第四油道206连通于第一环形槽6和第二环形槽8中的另一者。其中，第一回转体2的截面为圆形，第一油道201和第二油道202以第一回转体2的截面的圆心呈中心对称分布，第三油道204和第四油道206以第一回转体2的截面的圆心呈中心对称分布。
在该实施例中，进一步包括了第三油道204和第四油道206，同时提供了第一油道201、第二油道202、第三油道204和第四油道206的布局方式。为了避免液压油击穿第一环形槽6和第二环形槽8，确保了第一环形 槽6和第二环形槽8不连通，第一环形槽6和第二环形槽8之间会形成隔板。考虑到在回转在相对于第一回转体2转动的过程中可能会存在第一油道201或第二油道202被隔板遮挡的情况，这样可能会导致液压油产生节流损失，通过第三油道204和第四油道206的设置，第三油道204和第一油道201不会同时被隔板遮挡，第四油道206和第二油道202不会同时被隔板遮挡，在第一油道201被隔板遮挡时，可以启用第三油道204代替第一油道201，在第二油道202被隔板遮挡时，可以启用第四油道206，避免中心回转接头100内的液压油产生节流损失。
在该实施例中，通过第一油道201和第二油道202以第一回转体2的截面的圆心呈中心对称分布，第三油道204和第四油道206以第一回转体2的截面的圆心呈中心对称分布，确保了第一油道201连通于第一环形槽6和第二环形槽8中的一者。第二油道202连通于第一环形槽6和第二环形槽8中的另一者，确保了第三油道204连通于第一环形槽6和第二环形槽8中的一者，第四油道206连通于第一环形槽6和第二环形槽8中的另一者，确保了中心回转接头100双油路的形成。
具体地，第三油道204与第一油道201之间间隔的距离大于隔板的宽度，第四油道206与第二油道202之间间隔的距离大于隔板的宽度，确保第三油道204与第一油道201不会同时被隔板遮挡，确保第四油道206与第二油道202不会同时被隔板遮挡。
具体地，为了便于第二回转体4相对于第一回转体2转动，第一回转体2可以为圆柱形，第二回转体4可以为圆环形，为了保障油路的连通效果第一油口402、第二油口404、第一环形槽6、第二环形槽8、第一油道201、第二油道202、第三油道204和第四油道206处于同一高度。
在本申请的一个实施例中，如图4a和图4b所示，进一步地，还包括：输料孔10，开设在第一回转体2内；和/或导电滑环12，设置在第一回转体2上，导电滑环12能够相对于第一回转体2转动；电气线束孔14，开设在第一回转体2内，电气线束能够穿过电气线束孔14连接于导电滑环12；和/或安装槽16，开设在第二回转体4上，位于第一环形槽6和第二环形槽8的顶部和底部；密封件18，设置在安装槽16内。
在该实施例中，进一步包括了输料孔10的开设便于通过输料孔10输送物料，物料可以为水或混凝土等能够通过孔进行输送的物料。
在该实施例中，进一步包括了导电滑环12和电气线束孔14，通过导电滑环12和电气线束孔14的设置便于电气信号的传输，具体地，导电滑环12同轴布置在第一回转体2的上部，能够绕第一回转体2转动，导电滑环12的内周的轴线方向上设置有导电丝，每个导电丝与相应的导电线束在导电滑环12与第一回转体2相对转动的过程中保持电接触。
在该实施例中，进一步包括了安装槽16和密封件18，通过安装槽16和密封件18的设置，能够对第一环形槽6和第二环形槽8进行密封，避免了液压油的流失，使得中心回转接头100使用更为安全。
在本申请第二方面实施例中，如图2a和图2b所示，根据本申请提供了一种中心回转接头100，包括：第一回转体2、第二回转体4、第一环形槽6和第二环形槽8。
其中，第一回转体2内设置有第一油道201和第二油道202；第二回转体4套设在第一回转体2外侧，第二回转体4与第一回转体2能够相对转动，第二回转体4上设置有第一油口402和第二油口404；第一环形槽6设置在第一回转体2上，位于第一回转体2和第二回转体4的连接侧，第一油道201连通于第一环形槽6；第二环形槽8设置在第一回转体2上，位于第一回转体2和第二回转体4的连接侧，第二油道202连通于第二环形槽8。其中，第一油口402连通于第一环形槽6和第二环形槽8中的一者，第二油口404连通于第一环形槽6和第二环形槽8中的另一者。
在该实施例中，本申请提供的中心回转接头100，第一回转体2上的第一油道201连通于第一环形槽6，第一回转体2上的第二油道202连通于第二环形槽8，第二回转体4能够相对于第一回转体2转动，带动第一油口402和第二油口404相对于第一回转体2转动，第一油口402连通于第一环形槽6和第二环形槽8中的一者，第二油口404连通于第一环形槽6和第二环形槽8中的另一者。使得第一回转体2上的第一油道201能够连通于第一油口402和第二油口404中的一者，第二油道202能够连通于第一油口402和第二油口404中的另一者，实现了一个中心回转接头100 形成两个油道，能够减小中心回转接头100的外形尺寸，特别是缩短中心回转接头100的轴向长度，降低了中心回转接头100的重量和成本。
在该实施例中，本申请提供的中心回转接头100，在使用过程中，可以通过第一油道201和第二油道202接入液压油，第一油道201的液压油供给至第一环形槽6，通过第二回转体4相对于第一回转体2转动，第一环形槽6即可连通于第一油口402和第二油口404之间的一者实现液压油的输出，第二油道202的液压油供给至第二环形槽8，通过第二回转体4相对于第一回转体2转动，第二环形槽8即可连通于第一油口402和第二油口404之间的另一者实现液压油的输出，如此设置即可通过一个中心回转接头100实现双油路的输出，能够减小中心回转接头100的外形尺寸，特别是缩短中心回转接头100的轴向长度，降低了中心回转接头100的重量和成本。
在该实施例中，本申请提供的中心回转接头100，在使用过程中，还可以经由第一油道201和第二油道202中的一者输入液压油，通过第一油道201和第二油道202中的另一者返回液压油，例如通过第一油道201供给液压油，第一油道201通过第一环形槽6连通于第一油口402或第二油口404中的一者，与第一油道201连通的第一油口402或第二油口404即可为液压驱动件提供高压的液压油。进一步地通过液压驱动件后的低压液压油可以供给至第一油口402或第二油与第二环形槽8连通的一者，使得低压液压油通过第二油道202排出，如此设置通过一个中心回转接头100的设置即可实现液压油的供给与返回，能够减小中心回转接头100的外形尺寸，特别是缩短中心回转接头100的轴向长度，降低了中心回转接头100的重量和成本。
在本申请的一个实施例中，如图2a和图2b所示，进一步地，第一环形槽6和第二环形槽8为多个，多个第一环形槽6和第二环形槽8沿第二回转体4的高度方向间隔设置。其中，每个第一环形槽6连通于一个第一油道201，每个第二环形槽8连通于一个第二油道202；其中，第一油口402和第二油口404为多个，多个第一油口402和第二油口404分为多组，同一高度的第一环形槽6和第二环形槽8适配有一组第一油口402和第二 油口404。
在该实施例中，进一步地第一环形槽6和第二环形槽8为多个，多个第一环形槽6和第二环形槽8沿第一回转体2的高度方向间隔设置，使得中心回转接头100为多层结构，每层都可以提供双油道，更进一步地减小中心回转接头100的外形尺寸，降低了中心回转接头100的重量和成本，便于中心回转接头100的安装与布局，特别适用于工程车架转动部件之间狭窄的安装空间。
在本申请的一个实施例中，进一步地，还包括：第三油口，设置在第二回转体4内，第三油口连通于第一环形槽6和第二环形槽8中的一者；第四油口，设置在第二回转体4内，第四油口连通于第一环形槽6和第二环形槽8中的另一者的情况下；其中，第二回转体4的截面为圆环形，第一油口402和第二油口404以第二回转体4的截面的圆心呈中心对称分布，第三油口和第四油口以第二回转体4的截面的圆心呈中心对称分布。
在该实施例中，进一步包括了第三油口和第四油口，同时提供了第一油口402、第二油口404、第三油口和第四油口的布局方式。为了避免液压油击穿第一环形槽6和第二环形槽8，确保了第一环形槽6和第二环形槽8不连通，第一环形槽6和第二环形槽8之间会形成隔板，考虑到在回转在相对于第一回转体2转动的过程中可能会存在第一油口402或第二油口404被隔板遮挡的情况。这样可能会导致液压油产生节流损失，第三油口和第一油口402不会同时被隔板遮挡，在第一油口402被隔板遮挡时，可以启用第三油口代替第一油口402，第四油口和第二油口404不会同时被隔板遮挡，在第二油口404被隔板遮挡时，可以启用第四油口，避免中心回转接头100内的液压油产生节流损失。
在该实施例中，通过第一油口402和第二油口404以第二回转体4的截面的圆心呈中心对称分布，第三油口和第四油口以第二回转体4的截面的圆心呈中心对称分布，确保了第一油口402连通于第一环形槽6和第二环形槽8中的一者，第二油口404连通于第一环形槽6和第二环形槽8中的另一者，确保了第三油口连通于第一环形槽6和第二环形槽8中的一者，第四油口连通于第一环形槽6和第二环形槽8中的另一者，确保了中心回 转接头100双油路的形成。
具体地，第三油口与第一油口402之间间隔的距离大于隔板的宽度，第四油口与第二油口404之间间隔的距离大于隔板的宽度，确保第三油口与第一油口402不会同时被隔板遮挡，确保第四油口与第二油口404不会同时被隔板遮挡。
具体地，为了便于第二回转体4相对于第一回转体2转动，第一回转体2可以为圆柱形，第二回转体4可以为圆环形，为了保障油路的连通效果第一油口402、第二油口404、第三油口、第四油口、第一环形槽6、第二环形槽8、第一油道201和第二油道202处于同一高度。
在本申请的一个实施例中，如图4a和图4b所示，进一步地，还包括：输料孔10，开设在第一回转体2内；和/或导电滑环12，设置在第一回转体2上，导电滑环12能够相对于第一回转体2转动；电气线束孔14，开设在第一回转体2内，电气线束能够穿过电气线束孔14连接于导电滑环12；和/或安装槽16，开设在第二回转体4上，位于第一环形槽6和第二环形槽8的顶部和底部；密封件18，设置在安装槽16内。
在该实施例中，进一步包括了输料孔10的开设便于通过输料孔10输送物料，物料可以为水或混凝土等能够通过孔进行输送的物料。
在该实施例中，进一步包括了导电滑环12和电气线束孔14，通过导电滑环12和电气线束孔14的设置便于电气信号的传输，具体地，导电滑环12同轴布置在第一回转体2的上部，能够绕第一回转体2转动，导电滑环12的内周的轴线方向上设置有导电丝，每个导电丝与相应的导电线束在导电滑环12与第一回转体2相对转动的过程中保持电接触。
在该实施例中，进一步包括了安装槽16和密封件18，通过安装槽16和密封件18的设置，能够对第一环形槽6和第二环形槽8进行密封，避免了液压油的流失，使得中心回转接头100使用更为安全。
在本申请第三方面实施例中，如图5至图8所示，本申请提供了一种液压控制系统200，包括：上述第一方面中任一实施例提供的中心回转接头100，或上述第二方面中任一实施例提供的中心回转接头100、换向装置22和液压驱动件44。
其中，换向装置22的第一阀口226连通于中心回转接头100的第一油口402，换向装置22的第二阀口228连通于第二油口404；液压驱动件44的入油口连通于换向装置22的第三阀口230，液压驱动件44的出油口连通于换向装置22的第四阀口232。
在该实施例中，本申请提供的液压控制系统200，因液压控制系统200包括了上述第一方面提出的任一实施例的中心回转接头100，或述第二方面提出的任一实施例的中心回转接头100，因此第三方面提供的液压控制系统200具备上述中心回转接头100的全部有益技术效果。
在该实施例中，本申请提供的液压控制系统200可以将中心回转接头100中形成的两条油路作为供油路和回油路，通过换向装置22的设置确保在中心回转接头100的第二回转体4转动过程中，供油路始终连通于液压驱动件44的入油口，回油路始终连通于液压驱动件44的回油口。
例如，在第一环形槽6和第二环形槽8设置在第二回转体4上的情况下，将中心回转接头100的第一油道201作为进油道，供给的高压状态液压油通过中心回转接头100后通过第一油口402或第二油口404中的一者进入到换向装置22，通过换向装置22后经过换向装置22的第三阀口230进入到液压驱动件44内。在中心回转接头100的第二回转体4转动，第一油道201与第一油口402或第二油口404的连通状态发生变化，第一油道201连通于第一油口402或第二油口404中的另一者的情况下，换向装置22换向以确保换向装置22的第三阀口230为高压状态液压油的输出阀口。
例如，在第一环形槽6和第二环形槽8设置在第一回转体2上的情况下，将中心回转接头100的第二油道202作为进油道，供给的高压状态液压油通过中心回转接头100后通过第一油口402或第二油口404中的一者进入到换向装置22，通过换向装置22后经过换向装置22的第三阀口230进入到液压驱动件44内。在中心回转接头100的第二回转体4转动，第二油道202与第一油口402或第二油口404的连通状态发生变化，第二油道202连通于第一油口402或第二油口404中的另一者的情况下，换向装置22换向以确保换向装置22的第三阀口230为高压状态液压油的输出阀口。
具体地，在液压驱动件44和换向装置之间还可以设置液压驱动件换向 阀46，用以控制液压油供给向液压驱动件44输送液压油的方向。
在本申请的一个实施例中，进一步地，如图6所示，换向装置22为二位四通电磁换向阀222；或如图7所示，换向装置22为二位四通液控换向阀224；或如图8所示，换向装置22包括：第一供油路，第一供油路的一端连通于第一阀口226，另一端连通于第三阀口230，第一供油路设置有仅供液压油经由第一阀口226流向第三阀口230的第一单向阀234；第二供油路，第二供油管路的一端连通于第二阀口228，另一端连通于第三阀口230，第二供油路设置有仅供液压油经由第二阀口228流向第三阀口230的第二单向阀236。第一回油路，第一回油路一端连通于第一阀口226，另一端连通于第四阀口232，第一回油路上设置有仅供液压油经由第四阀口232流向第一阀口226的第三单向阀238；第二回油路，第二回油路一端连通于第二阀口228，另一端连通于第四阀口232，第二回油路上设置有仅供液压油经由第四阀口232流向第二阀口228的第四单向阀240。
在该实施例中，进一步提供了换向装置22的具体类型，换向装置22可以为二位四通电磁换向阀222、二位四通液控换向阀224或单向阀桥式结构。
具体地，在换向装置22为二位四通电磁换向阀222或二位四通液控换向阀224时，通过二位四通电磁换向阀222或二位四通液控换向阀224换向能够确保换向装置22的第三阀口230为高压状态液压油的输出阀口。
具体地，在换向装置22为单向阀桥式结构时，单向阀桥式结构包括了第一供油路、第二供油路、第一回油路和第二回油路，第一供油路上设置有第一单向阀234，第二供油路上设置有第二单向阀236，第一回油路上设置有第三单向阀238，第二回油路上设置有第四单向阀240，确保经由第一油道201或第二油道202中的一者供给的高压液压油仅能通过中心回转接头100通过了第一供油路或第二供油路供给至液压驱动件44的路由口。经由液压驱动件44返回的低压液压油仅能够通过第一回油路或第二回油路返回至中心回转接头100的第一回油路和第二回油路中的另一者。
在本申请的一个实施例中，如图13所示，进一步地，还包括：在第一环形槽6和第二环形槽8设置在第二回转体4上，第一回转体2上还设置 有第三油道204和第四油道206，第三油道204连通于第一环形槽6和第二环形槽8中的一者，第四油道206连通于第一环形槽6和第二环形槽8中的另一者的情况下。还包括：第三换向阀34，设置在第一换向阀28和中心回转接头100之间，第三换向阀34的进油阀口连通于第一换向阀28的第一执行阀口，第三换向阀34的第一执行阀口连通于第一油道201，第三换向阀34的第二执行阀口连通于第三油道204。第四换向阀36，设置在第一换向阀28和中心回转接头100之间，第四换向阀36的进油阀口连通于第一换向阀28的第二执行阀口，第四换向阀36的第一执行阀口连通于第二油道202，第四换向阀36的第二执行阀口连通于第四油道206。第一感应器38，连接于第一油道201和第三油道204，用以获取第一油道201和第三油道204内的第一油压信息；第二感应器40，连接于第二油道202和第四油道206，用以获取第二油道202和第四油道206内的第二油压信息；第一控制器42，连接于第一感应器38和第二感应器40，第一控制器42用于在第一油压信息异常的情况下控制第三换向阀34换向，在第二油压信息异常的情况下控制第四换向阀36换向。
在该实施例中，在中心回转接头100包括第三油道204和第四油道206的情况下，作业车辆300包括了第三换向阀34、第四换向阀36、第一感应器38、第二感应器40和第一控制器42。
具体地，第一感应器38用以获取第一油道201和第三油道204内的第一油压信息，在第一油压信息异常时，可以认为当前状态下的第一油道201或第三油道204中的一者被第一环形槽6和第二环形槽8之间的隔板遮挡，此时可以通过第一控制器42控制第三换向阀34换向，改变第一油道201和第三油道204的工作状态，使得第一油道201或第三油道204中的另一者与第一环形槽6和第二环形槽8连通，避免产生节流损失。
具体地，第二感应器40用以获取第二油道202和第四油道206内的第二油压信息，在第二油压信息异常时，可以认为当前状态下的第二油道202或第四油道206中的一者被第一环形槽6和第二环形槽8之间的隔板遮挡，此时可以通过第一控制器42控制第四换向阀36换向，改变第二油道202和第四油道206的工作状态，使得第二油道202或第四油道206中的另一 者与第一环形槽6和第二环形槽8连通，避免产生节流损失。
在本申请的一个实施例中，进一步地，第五换向阀，设置在中心回转接头100和换向装置22之间，第五换向阀的第一执行阀口连通于第一油口402，第五换向阀的第二执行阀口连通于第三油口，第五换向阀的出油阀口连通于换向装置22的第一阀口226。第六换向阀，设置在中心回转接头100和换向装置22之间，第六换向阀的第一执行阀口连通于第二油口404，第六换向阀的第二执行阀口连通于第四油口，第四换向阀36的出油阀口连通于换向装置22的第二阀口228。第三感应器，连接于第一油口402和第三油口，用以获取第一油口402和第三油口内的第三油压信息；第四感应器，连接于第二油口404和第四油口，用以获取第二油口404和第四油口内的第四油压信息；第二控制器，连接于第三感应器和第四感应器，第二控制器用于在第三油压信息异常的情况下控制第五换向阀换向，在第四油压信息异常的情况下控制第六换向阀换向。
在该实施例中，在中心回转接头100包括第三油口和第四油口的情况下，作业车辆300包括了第五换向阀、第六换向阀、第三感应器、第四感应器和第二控制器。
具体地，第三感应器用以获取第一油口402和第三油口内的第三油压信息，在第三油压信息异常时，可以认为当前状态下的第一油口402或第三油口中的一者被第一环形槽6和第二环形槽8之间的隔板遮挡，此时可以通过第一控制器42控制第五换向阀换向，改变第一油口402和第三油口的工作状态，使得第一油口402或第三油口中的另一者与第一环形槽6和第二环形槽8连通，避免产生节流损失。
具体地，第四感应器用以获取第二油口404和第四油口内的第四油压信息，在第四油压信息异常时，可以认为当前状态下的第二油口404或第四油口中的一者被第一环形槽6和第二环形槽8之间的隔板遮挡，此时可以通过第二控制器控制第六换向阀换向，改变第二油口404和第四油口的工作状态，使得第二油口404或第四油口中的另一者与第一环形槽6和第二环形槽8连通，避免产生节流损失。
在本申请第四方面实施例中，如图9至图12所示，液压控制系统，包 括：上述第一方面中任一实施例提供的中心回转接头100，或上述第二方面中任一实施例提供的中心回转接头100、换向装置22和液压驱动件44。
其中，换向装置22的第一阀口226连通于中心回转接头100的第一油道201，换向装置22的第二阀口228连通于第二油道202；液压驱动件44，液压驱动件44的入油口连通于换向装置22的第三阀口230，液压驱动件44的出油口连通于换向装置22的第四阀口232。
本申请提供的液压控制系统200可以将中心回转接头100中形成的两条油路分别作为供油路和回油路，通过换向装置22的设置确保在中心回转接头100的第二回转体4转动过程中，供油路始终连通于液压驱动件44的入油口，回油路始终连通于液压驱动件44的回油口。
例如，在第一环形槽6和第二环形槽8设置在第二回转体4上的情况下，将中心回转接头100的第一油口402作为进油道，供给的高压状态液压油通过中心回转接头100后通过第一油道201或第二油道202中的一者进入到换向装置22，通过换向装置22后经过换向装置22的第三阀口230进入到液压驱动件44内，在中心回转接头100的第二回转体4转动，第一油口402与第一油道201或第二油道202的连通状态发生变化，第一油道201连通于第一油道201或第二油道202中的另一者的情况下，换向装置22换向以确保换向装置22的第三阀口230为高压状态液压油的输出阀口。
例如，在第一环形槽6和第二环形槽8设置在第一回转体2上的情况下，将中心回转接头100的第二油口404作为进油道，供给的高压状态液压油通过中心回转接头100后通过第一油道201或第二油道202中的一者进入到换向装置22，通过换向装置22后经过换向装置22的第三阀口230进入到液压驱动件44内，在中心回转接头100的第二回转体4转动，第二油口404与第一油道201或第二油道202的连通状态发生变化，第二油口404连通于第一油道201或第二油道202中的另一者的情况下，换向装置22换向以确保换向装置22的第三阀口230为高压状态液压油的输出阀口。
具体地，在液压驱动件44和换向装置22之间还可以设置液压驱动件44换向阀，用以控制液压油供给向液压驱动件44输送液压油的方向。
在本申请的一个实施例中，进一步地，如图10和图11所示，换向装 置22为二位四通电磁换向阀222；或如图12所示，换向装置22为二位四通液控换向阀224；或如图13所示，换向装置22包括：第一供油路，第一供油路的一端连通于第一阀口226，另一端连通于第三阀口230，第一供油路上设置有第一单向阀234，第一单向阀234的进口连通第一阀口226；第二供油路，第二供油管路的一端连通于第二阀口228，另一端连通于第三阀口230，第二供油路设置有第二单向阀236，第二单向阀236的进口连通于第二阀口228；第一回油路，第一回油路一端连通于第一阀口226，另一端连通于第四阀口232，第一回油路上设置有第三单向阀238，第三单向阀238的进口连通于第四阀口232；第二回油路，第二回油路一端连通于第二阀口228，另一端连通于第四阀口232，第二回油路上设置有第四单向阀240，第四单向阀240的进口连通于第四阀口232。
在该实施例中，进一步提供了换向装置22的具体类型，换向装置22可以为二位四通电磁换向阀222、二位四通液控换向阀224或单向阀桥式结构。
具体地，在换向装置22为二位四通电磁换向阀222或二位四通液控换向阀224时，通过二位四通电磁换向阀222或二位四通液控换向阀224换向能够确保换向装置22的第三阀口230为高压状态液压油的输出阀口。
具体地，在换向装置22为单向阀桥式结构时，单向阀桥式结构包括了第一供油路、第二供油路、第一回油路和第二回油路，第一供油路上设置有第一单向阀234，第二供油路上设置有第二单向阀236，第一回油路上设置有第三单向阀238，第二回油路上设置有第四单向阀240，确保经由第一油道201或第二油道202中的一者供给的高压液压油仅能通过中心回转接头100通过了第一供油路或第二供油路供给至液压驱动件44的路由口，经由液压驱动件44返回的低压液压油仅能够通过第一回油路或第二回油路返回至中心回转接头100的第一回油路和第二回油路中的另一者。
在本申请的一个实施例中，进一步地，如图14所示，在第一环形槽6和第二环形槽8设置在第二回转体4上，第一回转体2上还设置有第三油道204和第四油道206，第三油道204连通于第一环形槽6和第二环形槽8中的一者，第四油道206连通于第一环形槽6和第二环形槽8中的另一者 的情况下，还包括：第七换向阀，设置在中心回转接头100和换向装置22之间，第七换向阀的第一执行阀口连通于第一油道201，第七换向阀的第二执行阀口连通于第三油道204，第七换向阀的出油阀口连通于换向装置22的第一阀口226；第八换向阀，设置在中心回转接头100和换向装置22之间，第八换向阀的第一执行阀口连通于第二油道202，第八换向阀的第二执行阀口连通于第四油道206，第八换向阀的出油阀口连通于换向装置22的第二阀口228；第五感应器，连接于第一油道201和第三油道204，用以获取第一油道201和第三油道204内的第五油压信息；第六感应器，连接于第二油道202和第四油道206，用以获取第二油道202和第四油道206内的第六油压信息；第三控制器，连接于第五感应器和第六感应器，第三控制器用于在第五油压信息异常的情况下控制第七换向阀换向，在第六油压信息异常的情况下控制第八换向阀换向。或在第一环形槽6和第二环形槽8设置在第一回转体2上，第二回转体4上还设置有第三油口406和第四油口408，第三油口406连通于第一环形槽6和第二环形槽8中的一者，第四油口408连通于第一环形槽6和第二环形槽8中的另一者的情况下，还包括：第九换向阀54，第九换向阀54的第一执行阀口连通于第一油口402，第九换向阀54的第二执行阀口连通于第三油口406；第十换向阀56，第十换向阀56的第一执行阀口连通于第二油口404，第十换向阀56的第二执行阀口连通于第四油口408；第七感应器48，连接于第一油口402和第三油口406，用以获取第一油口402和第三油口406内的第七油压信息；其中，第九换向阀54的进油阀口或第十换向阀56的进油阀口连通于油源；第八感应器50，连接于第二油口404和第四油口408，用以获取第二油口404和第四油口408内的第八油压信息；第四控制器52，连接于第七感应器和第八感应器，第四控制器52用于在第七油压信息异常的情况下控制第九换向阀54换向，在第八油压信息异常的情况下控制第十换向阀56换向。
在该实施例中，在中心回转接头100包括第三油道204和第四油道206的情况下，工程车辆包括了第七换向阀、第八换向阀、第五感应器、第六感应器和第三控制器。
具体地，第五感应器用以获取第一油道201和第三油道204内的第五油压信息，在第五油压信息异常时，可以认为当前状态下的第一油道201或第三油道204中的一者被第一环形槽6和第二环形槽8之间的隔板遮挡，此时可以通过第三控制器控制第七换向阀换向，改变第一油道201和第三油道204的工作状态，使得第一油道201或第三油道204中的另一者与第一环形槽6和第二环形槽8连通，避免出现产生节流损失。
具体地，第六感应器用以获取第二油道202和第四油道206内的第六油压信息，在第六油压信息异常时，可以认为当前状态下的第二油道202或第四油道206中的一者被第一环形槽6和第二环形槽8之间的隔板遮挡，此时可以通第三控制器控制第八换向阀换向，改变第二油道202和第四油道206的工作状态，使得第二油道202或第四油道206中的另一者与第一环形槽6和第二环形槽8连通，避免出现产生节流损失。
在该技术方案中，在中心回转接头100包括第三油口406和第四油口408的情况下，工程车辆包括了第九换向阀54、第十换向阀56、第七感应器48、第八感应器50和第四控制器52。
具体地，第七感应器48用以获取第一油口402和第三油口406内的第七油压信息，在第七油压信息异常时，可以认为当前状态下的第一油口402或第三油口406中的一者被第一环形槽6和第二环形槽8之间的隔板遮挡，此时可以通过第四控制器52控制第九换向阀54换向，改变第一油口402和第三油口406的工作状态，使得第一油口402或第三油口406中的另一者与第一环形槽6和第二环形槽8连通，避免出现产生节流损失。
具体地，第八感应器50用以获取第二油口404和第四油口408内的第八油压信息，在第八油压信息异常时，可以认为当前状态下的第二油口404或第四油口408中的一者被第一环形槽6和第二环形槽8之间的隔板遮挡，此时可以通过第四控制器52控制第十换向阀56换向，改变第二油口404和第四油口408的工作状态，使得第二油口404或第四油口408中的另一者与第一环形槽6和第二环形槽8连通，避免出现产生节流损失。
在本申请第五方面实施例中，如图13或图14所示，根据本申请提供了一种作业车辆300，包括：上述任一实施例提供的液压控制系统200、液 压油泵24和执行件26。
其中，液压油泵24通过供油路连通于中心回转接头100的第一油道201或第二油道202；或如图13所示，液压油泵24通过供油路连通于第四换向阀36的进油阀口或第三换向阀34的进油阀口；或液压油泵24通过供油路连通于中心回转接头100的第一油口402或第二油口404；或如图14所示，液压油泵24通过供油路连通于第九换向阀54的进油阀口或第十换向阀56的进油阀口；执行件26，连接于液压驱动件44。
本申请提供的作业车辆300，因作业车辆300包括了上述的液压控制系统200，因此本申请提供的作业车辆300具备的液压控制系统200的全部有益技术效果。
具体地，作业车辆300可以为挖掘机、起重机、泵车等其他带有旋转部件的车辆。
在本申请的一个实施例中，如图13和图14所示，进一步地，还包括：第一换向阀28，设置在供油路上，液压油泵24连通于第一换向阀28的进油阀口，第一换向阀28的第一执行阀口连通于第一油道201，第一换向阀28的第二执行阀口连通于第二油道202；和/或回转马达30，通过驱动油路连通于液压油泵24。第二换向阀32，液压油泵24连通于第二换向阀32的进油阀口，第二换向阀32的第一执行阀口连通于回转马达30的第一执行阀口，回转马达30的第二执行阀口连通于第二换向阀32的第二执行阀口。
在该实施例中，进一步包括了第一换向阀28、回转马达30和第二换向阀32。通过第一换向阀28的设置，能够使得液压油泵24输出的液压油通过第一换向阀28供给至中心回转接头100中第一油道201和第二油道202中的一者，能够使经由第一油道201和第二油道202中另一者返回的低压液压油通过第一换向阀28返回至油箱；通过回转马达30和第二换向阀32的设置，能够通过液压油泵24向回转马达30供给高压液压油的第一执行阀口，能够驱动回转马达30转动，经由回转马达30的回转马达30的第二执行阀口能够通过第二换向阀32的第二执行阀口返回至油箱。
具体实施例1
如图1a和图1b所示，本申请的一个实施例提供了一种中心回转接头 100，如图1a和图1b所示，该中心回转接头100包括第二回转体4、第一回转体2、密封件18，其中第一回转体2和第二回转体4是相对概念，即第一回转体2可跟作业车辆或工程机械的支承部分保持固定，也可跟工程机械的回转部分保持固定。第二回转体4上设有第一油口402、第二油口404、第一环形槽6和第二环形槽8，视需要可以分布多层油口和环形槽(图1a和图1b中为两层环形槽)，第一油口402和第二油口404分布在第二回转体4的周边。第一环形槽6和第二环形槽8之间有两道隔板，将同一层环形槽分成两个环形油道，第一环形槽6和第二环形槽8分别跟第一油口402和第二油口404固定相通。第一回转体2设有第一油道201和第二油道202，同一层的第一油道201和第二油道202跟第二回转体4上的同一层的第一环形槽6和第二环形槽8固定相通。第二回转体4上的第一环形槽6和第二环形槽8会根据回转位置切换与第一回转体2连通的油道。在第二回转体4上设有密封圈环形安装槽16，安装密封件18，防止油液泄漏。
进一步的，本实施例提供的中心回转接头100，其适用于第一回转体2上设有环形槽结构，其结构如图2a和图2b所示，第二回转体4上设有第一油口402和第二油口404，第二回转体4为多层结构，每一层上设有一组第一油口402和第二油口404。第一回转体2设有第一油道201、第二油道202、第一环形槽6和第二环形槽8，第一回转体2同样为多层结构，第一回转体2上同一层的第一油道201和第二油道202分别跟第一回转体2上的第一环形槽6和第二环形槽8相通。第一回转体2的第一环形槽6和第二环形槽8之间有两道隔板，分隔第一环形槽6和第二环形槽8，第一回转体2上的第一油道201和第二油道202会根据回转位置切换与第二回转体4连通的油口。在第一回转体2上设有密封圈环形安装槽16，安装密封件18，防止油液泄漏。
进一步的，如图3a和图3b所示，该中心回转接头100包括第二回转体4、第一回转体2、密封件18，第二回转体4上设有第一油口402、第二油口404、第一环形槽6和第二环形槽8，第一油口402和第二油口404分布在第二回转体4的周边。第一环形槽6和第二环形槽8之间有两个隔板，第一环形槽6、第二环形槽8和两个隔板之间的连线成环形，隔板将第一 环形槽6和第二环形槽8分隔。第一环形槽6与第一油口402固定连通，第二环形槽8与第二油口404固定连通。第一回转体2为多层结构，设有多个第一油道201和第二油道202，同一层上设置有第一油道201、第二油道202、第三油道204和第四油道206，第一回转体2上的第一油道201和第三油道204不会同时被隔板遮挡，第二油道202和第四油道206不会同时被隔板遮挡，第二回转体4上的第一环形槽6和第二环形槽8会根据回转位置切换与第一回转体2连通的油道。A第一油道201和第二油道202对称分布，第三油道204和第四油道206对称分布。在第二回转体4上设有密封圈环形安装槽16，安装密封件18，防止油液泄漏。
进一步的，如图3a和图3b所示，本实施例的中心回转接头100其扩展可适用于泵车、消防车等需要同时输送油液、电气信号、料(包括水、砼等)，该中心回转接头100包括第二回转体4、第一回转体2、密封件18、导电滑环12。在第一回转体2的内部的中心轴线方向增加输料孔10，输料孔10道供输料管通过；另在轴线方向设定电气线束孔14，电气线束孔14供导电滑环12的线束通过。导电滑环12同轴布置在第一回转体2的上部，能够绕第一回转体2转动，导电滑环12的内周的轴线方向上设置有导电丝，每个导电丝与相应的导电线束在导电滑环12与第一回转体2相对转动的过程中保持电接触。
具体实施例2
如图5至图8所示，本申请的一个实施例提供了一种液压控制系统200，包括了上述任一实施例的中心回转接头100、换向装置22和液压驱动件44。考虑到中心回转接头100随着第二回转体4的转动，第一回转体2上的流道会切换与第二回转体4油口的连通方向，为了确保中心回转接头100同一层上的两条油道能够实现高压液压油的供给与低压液压油的返回，所以在液压驱动件44和中心回转接头100之间设置了换向装置22。如图5所示，在工程机械上增加中心回转接头100是为了实现中心回转接头100位于固定系统上的第一油道201和液压驱动件44的入油口相通、中心回转接头100位于固定系统上的第二油道202和液压驱动件44的出油口相连通。中心回转接头100和换向装置22可以实现该功能，其原理为：在中心回转 接头100上设有感应器，中心回转接头100的初始状态为第一油道201和第一油口402相通，第二油道202和第二油口404相通，换向装置22的初始状态为第一阀口226和第三阀口230相通，第二阀口228和第四阀口232相通。当感应器检查到中心回转接头100的内部油道通向换向时，即中心回转接头100的第一油道201和第二油口404相通，第二油道202和第一油口402相通时，触发指令，换向装置22的内部油道通向，即第一阀口226和第四阀口232相通，第二阀口228和第三阀口230相通。从而实现中心回转接头100的第一油道201和液压驱动件44的入油口相通，第二油道202和液压驱动件44的回油口相通。
进一步的，如图6所示，换向装置22可采用二位四通电磁换向阀222的结构，中心回转接头100当中心回转接头100上的感应装置242检查到中心回转接头100的内部油道通向换向时，工程机械的控制装置244控制电磁阀改变得电状态，进而保证中心回转接头100的第一油道201和液压驱动件44的入油口相通，第二油道202和液压驱动件44的回油口相通。
进一步的，中心回转接头100的第一油道201为P口(高压进油口)，第二油道202为T口(低压回油口或低压泄油口)时，即油路走向为液压油源到中心回转接头100的P口再到液压驱动件44，而液压驱动件44的回油或泄油通过中心回转接头100的T口回油箱。如图7所示，换向装置22可采用单向阀桥式结构，第一油道201为P口，第二油道202为T口，高压液压油从第一油道201进入中心回转接头100，如第一油道201与第一油口402相通，第二油道202与第二油口404通时，高压液压油从第一单向阀234进入第一阀口226，而低压液压油从第四阀口232进入，由于换向装置22的第一阀口226为高压，低压液压油只能从第四单向阀240到中心回转接头100的第二油口404，进而通过第二油道202返回至油箱，从而实现中心回转接头100的第一油道201和液压驱动件44的入油口相通，第二油道202和液压驱动件44的出油口相通。如第一油道201与第二油口404相通，第二油道202与第一油口402相通时，高压液压油从第二单向阀236阀进入第三阀口230，而低压液压油从第四阀口232进入，由于换向装置22的第二阀口228为高压，低压液压油只能从第三单向阀238 到中心回转接头100的第一油口402，进而通过第二油道202，从而实现中心回转接头100的第一油道201和液压驱动件44的入油口相通，第二油道202和液压驱动件44的出油口相通。
进一步的，中心回转接头100的第一油道201为P口(高压进油口)，第二油道202为T口(低压回油口或低压泄油口)时，即油路走向为液压油源到中心回转接头100的P口再到液压驱动件44，而液压驱动件44的回油或泄油通过中心回转接头100的T口回油箱。如图8所示，第一油道201为P口，第二油道202为T口，高压液压油从第一油道201进入中心回转接头100，如第一油道201与第一油口402相通，第二油道202与第二油口404相通时，在高压液压油的作用下，液控换向阀处于左位，此时换向装置22的第一阀口226和第三阀口230相通，第二阀口228和第四阀口232相通，从而实现中心回转接头100的第一油道201和液压驱动件44的入油口相通，第二油道202和液压驱动件44的出油口相通。如第一油道201与第二油口404相通，第二油道202与第一油口402相通时，在高压液压油的作用下，液控换向阀处于右位，此时换向装置22的第一阀口226和第四阀口232相通，第二阀口228和第三阀口230相通，从而实现中心回转接头100的第一油道201和液压驱动件44的入油口相通，第二油道202和液压驱动件44的出油口相通。
具体实施例3
如图13所示，本申请的一个实施例提供了一种作业车辆300，包括上述任一实施例的液压控制系统200、液压油泵24、第一换向阀28、第三换向阀34、第四换向阀36、执行件26、第二换向阀32、回转马达30、第一控制器42、第一感应器38和第二感应器40。
其中，液压控制系统200中的中心回转接头100的第一环形槽6和第二环形槽8设置在第二回转体4上，第一回转体2上还设置有第三油道204和第四油道206，第三油道204连通于第一环形槽6和第二环形槽8中的一者，第四油道206连通于第一环形槽6和第二环形槽8中的另一者。
其中，第三换向阀34和第四换向阀36可以为二位三通换向阀。
其中，液压油泵24的出口与第一换向阀28的进油阀口(P口)相通， 并与回第二换向阀32的进油阀口相通；第一换向阀28的第一执行阀口与第三换向阀34的进油阀口连通，第一换向阀28的第二执行阀口与第四换向阀36的进油阀口连通。第三换向阀34的第一执行阀口连通于的中心回转接头100的第一油道201，第三换向阀34的第二执行阀口连通于的中心回转接头100的第三油道204；第四换向阀36的第一执行阀口连通于第二油道202，第四换向阀36的第二执行阀口连通于第四油道206。第三换向阀34和第四换向阀36的初始状态为进油阀口跟第一执行阀口相通，在得电时进油阀口与第一执行阀口相通；中心回转接头100的第一油口402与液压控制系统200的换向装置22的第一阀口226相通，中心回转接头100的第二油口404与液压控制系统200的换向装置22的第二阀口228相通；换向装置22的第三阀口230和液压控制系统200的液压驱动件44的入油口相通，换向装置22的第三阀口230和液压驱动件44的出油口相通；第二换向阀32的第一执行阀口连通于回转马达30的第一执行阀口，回转马达30的第二执行阀口连通于第二换向阀32的第二执行阀口。
第一控制器42接收第一感应器38和第二感应器40的输入信号，并输出控制信息控制第二换向阀32的通断和换向装置22的油路换向。第一感应器38在双油道共中心回转接头100的第一油道201被隔板遮挡时输出信号给第一控制器42，第二感应器40在中心回转接头100的第二油道202被隔板遮挡时输出信号给第一控制器42。
如图13所示的一种具有上述任一实施例提供的液压控制系统200的作业车辆300或工程器械，在中心回转接头100的第二回转体4转动时，会出现第二回转体4上的隔板部分堵住第一回转体2的油道，产生节流损失。或者完全堵住第一回转体2油道，导致中心回转接头100的油路无法连通；更有甚者，如果往复回转，会存在隔板刚遮挡油道，触发第一控制器42发出信号，控制换向装置22换向，会产生油口连接错误的问题。为解决以上问题，该作业车辆300的控制方法，包含以下步骤：
第一感应器38在中心回转接头100的第一油道201被隔板遮挡时输出信号给第一控制器42；
第二感应器40在中心回转接头100的第二油道202被隔板遮挡时输出 信号给第一控制器42；控制第三换向阀34和第四换向阀36失电，第三换向阀34和第四换向阀36工作在左位，此时第三换向阀34的第一阀口226和中心回转接头100的第一油道201相通，第四换向阀36的第二阀口228和中心回转接头100的第二油道202相通，不产生节流损失。
控制方法中含有3个标志位，分别为判断第一感应器38得电的Flag1、判断第二感应器40得电的Flag2、判断第一感应器38和第二感应器40均得电的Flag3。
第一感应器38和第二感应器40均不得电时，且Flag3＝0时，Flag1值保持不变，Flag2值保持不变，第三换向阀34和第四换向阀36工作位置不变，换向装置22工作位置不变。
第一感应器38和第二感应器40均不得电时，且Flag3＝1时，Flag1＝0，Flag2＝0，Flag3＝0，第三换向阀34和第四换向阀36工作位置不变，换向装置22工作位置不变。
第一感应器38得电，第二感应器40不得电时，控制第三换向阀34和第四换向阀36)得电，第三换向阀34和第四换向阀36工作在右位，此时第三换向阀34的第一阀口226和中心回转接头100的第三油道204相通，第四换向阀36的第一阀口226和中心回转接头100的第三油道204相通，不产生节流损失。Flag1＝1，Flag2值保持不变，Flag3值保持不变，换向装置22工作位置不变。
当第二感应器40得电，第一感应器38不得电时，控制第三换向阀34和第四换向阀36不得电，第三换向阀34和第四换向阀36工作在左位，此时第三换向阀34的第一阀口226和中心回转接头100的第一油道201相通，第四换向阀36的第一阀口226和中心回转接头100的第二油道202相通，不产生节流损失。Flag2＝1，Flag1值保持不变，Flag3值保持不变，换向装置22工作位置不变。
当flag2＝1且flag1＝1且flag3＝1时，第三换向阀34和第四换向阀36状态不变，换向装置22工作位置换向。
在本申请中，术语“安装”、“相连”、“连接”、“固定”等术语均应做广义理解，例如，“连接”可以是固定连接，也可以是可拆卸连接，或一体地连接；“相连”可以是直接相连，也可以通过中间媒介间接相连。对于本领域 的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本说明书的描述中，术语“一个实施例”、“一些实施例”、“具体实施例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或实例。而且，描述的具体特征、结构、材料或特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (13)

  1. 一种中心回转接头，其中，包括：
    第一回转体，所述第一回转体内设置有第一油道和第二油道；
    第二回转体，套设在所述第一回转体外侧，所述第二回转体与所述第一回转体转动连接，所述第二回转体上设置有第一油口和第二油口；
    第一环形槽，设置于所述第一回转体与所述第二回转体之间；
    第二环形槽，设置于所述第一回转体与所述第二回转体之间；
    隔板，设置于所述第一环形槽与所述第二环形槽之间，用于隔断第一环形槽与所述第二环形槽；
    其中，所述第一环形槽和所述第二环形槽位于所述第一回转体或所述第二回转体的同一径向截面上，所述第一油口连通于所述第一环形槽和第二环形槽中的一者，所述第二油口连通于所述第一环形槽和第二环形槽中的另一者，所述第一油道连通于所述第一环形槽和第二环形槽中的一者，所述第二油道连通于所述第一环形槽和第二环形槽中的另一者。
  2. 根据权利要求1所述的中心回转接头，其中，
    所述第一环形槽和第二环形槽设置于所述第二回转体的内周面上，所述第一油口连通于所述第一环形槽，所述第二油口连通于所述第二环形槽，所述第一油道连通于所述第一环形槽和第二环形槽中的一者，所述第二油道连通于所述第一环形槽和第二环形槽中的另一者；或
    所述第一环形槽和第二环形槽设置于所述第一回转体的外周面上，所述第一油道连通于所述第一环形槽，所述第二油道连通所述第二环形槽，所述第一油口连通于所述第一环形槽和第二环形槽中的一者，所述第二油口连通于所述第一环形槽和第二环形槽中的另一者。
  3. 根据权利要求2所述的中心回转接头，其中，
    所述第一环形槽和所述第二环形槽为多层，多层所述第一环形槽和所述第二环形槽沿所述第二回转体的轴线方向间隔设置；
    所述第一油口和第二油口为多个，多个第一油口和第二油口分别与多层所述第一环形槽、所述第二环形槽对应设置；
    所述第一油道和所述第二油道为多个，多个所述第一油道和所述第二油道分为多组，同一高度的所述第一环形槽和所述第二环形槽适配有一组所述第一油道和所述第二油道。
  4. 根据权利要求2所述的中心回转接头，其中，
    在所述第一环形槽和第二环形槽设置于所述第二回转体的内周面上的情况下，还包括：
    第三油道，设置在第一回转体内，所述第三油道连通于第一环形槽和所述第二环形槽中的一者；
    第四油道，设置在第一回转体内，所述第四油道连通于第一环形槽和所述第二环形槽中的另一者；
    其中，所述第一回转体的截面为圆形，所述第一油道和第二油道以所述第一回转体的截面的圆心呈中心对称分布，所述第三油道和第四油道以所述第一回转体的截面的圆心呈中心对称分布；或
    所述第一环形槽和第二环形槽设置于所述第一回转体的外周面上的情况下，还包括：
    第三油口，设置在所述第二回转体内，所述第三油口连通于述第一半环形槽和所述第二环形槽中的一者；
    第四油口，设置在所述第二回转体内，所述第四油口连通于述第一半环形槽和所述第二环形槽中的另一者的情况下；
    其中，所述第二回转体的截面为圆环形，所述第一油口和第二油口以所述第二回转体的截面的圆心呈中心对称分布，所述第三油口和第四油口以所述第二回转体的截面的圆心呈中心对称分布。
  5. 根据权利要求1至4中任一项所述的中心回转接头，其中，还包括：
    输料孔，开设在第一回转体内；和/或
    导电滑环，设置在第一回转体上，导电滑环能够相对于第一回转体转动；
    电气线束孔，开设在第一回转体内，电气线束能够穿过电气线束孔连接于导电滑环；和/或
    安装槽，开设在所述第一回转体或第二回转体上，位于第一环形槽和 第二环形槽的顶部和底部；
    密封件，设置在安装槽内。
  6. 一种液压控制系统，其中，包括：
    如权利要求1至5中任一项所述的中心回转接头；
    换向装置，所述换向装置的第一阀口连通于所述中心回转接头的第一油口，所述换向装置的第二阀口连通于所述第二油口；
    液压驱动件，所述液压驱动件的入油口连通于所述换向装置的第三阀口，所述液压驱动件的出油口连通于所述换向装置的第四阀口。
  7. 根据权利要求6所述的液压控制系统，其中，
    所述换向装置为二位四通电磁换向阀；或
    所述换向装置为二位四通液控换向阀；或
    所述换向装置包括：
    第一供油路，所述第一供油路的一端连通于所述第一阀口，另一端连通于所述第三阀口，所述第一供油路上设置有第一单向阀，所述第一单向阀的进口连通所述第一阀口；
    第二供油路，所述第二供油管路的一端连通于所述第二阀口，另一端连通于所述第三阀口，所述第二供油路设置有第二单向阀，所述第二单向阀的进口连通于所述第二阀口；
    第一回油路，所述第一回油路一端连通于所述第一阀口，另一端连通于所述第四阀口，所述第一回油路上设置有第三单向阀，所述第三单向阀的进口连通于所述第四阀口；
    第二回油路，所述第二回油路一端连通于所述第二阀口，另一端连通于所述第四阀口，所述第二回油路上设置有第四单向阀，所述第四单向阀的进口连通于所述第四阀口。
  8. 根据权利要求6或7所述的液压控制系统，其中，在所述第一环形槽和所述第二环形槽设置在所述第二回转体上，所述第一回转体上还设置有第三油道和第四油道，所述第三油道连通于第一环形槽和所述第二环形槽中的一者，所述第四油道连通于第一环形槽和所述第二环形槽中的另一者的情况下，还包括：
    第三换向阀，所述第三换向阀的第一执行阀口连通于所述第一油道，所述第三换向阀的第二执行阀口连通于所述第三油道；
    第四换向阀，所述第四换向阀的第一执行阀口连通于所述第二油道，所述第四换向阀的第二执行阀口连通于所述第四油道；
    其中，所述第四换向阀的进油阀口或所述第三换向阀的进油阀口连通于油源；
    第一感应器，连接于所述第一油道和第三油道，用以获取第一油道和第三油道内的第一油压信息；
    第二感应器，连接于所述第二油道和第四油道，用以获取第二油道和第四油道内的第二油压信息；
    第一控制器，连接于所述第一感应器和所述第二感应器，所述第一控制器用于在所述第一油压信息异常的情况下控制所述第三换向阀换向，在所述第二油压信息异常的情况下控制所述第四换向阀换向；或
    在所述第一环形槽和所述第二环形槽设置在所述第一回转体上，所述第二回转体上还设置有第三油口和第四油口，所述第三油口连通于第一环形槽和所述第二环形槽中的一者，所述第四油口连通于第一环形槽和所述第二环形槽中的另一者的情况下，还包括：
    第五换向阀，设置在所述中心回转接头和所述换向装置之间，所述第五换向阀的第一执行阀口连通于所述第一油口，第五换向阀的第二执行阀口连通于所述第三油口，所述第五换向阀的出油阀口连通于所述换向装置的第一阀口；
    第六换向阀，设置在所述中心回转接头和所述换向装置之间，所述第六换向阀的第一执行阀口连通于所述第二油口，第六换向阀的第二执行阀口连通于所述第四油口，所述第六换向阀的出油阀口连通于所述换向装置的第二阀口；
    第三感应器，连接于所述第一油口和第三油口，用以获取第一油口和第三油口内的第三油压信息；
    第四感应器，连接于所述第二油口和第四油口，用以获取第二油口和第四油口内的第四油压信息；
    第二控制器，连接于所述第三感应器和所述第四感应器，所述第二控制器用于在所述第三油压信息异常的情况下控制所述第五换向阀换向，在所述第四油压信息异常的情况下控制所述第六换向阀换向。
  9. 一种液压控制系统，其中，包括：
    如权利要求1至5中任一项所述的中心回转接头；
    换向装置，所述换向装置的第一阀口连通于所述中心回转接头的第一油道，所述换向装置的第二阀口连通于所述第二油道；
    液压驱动件，所述液压驱动件的入油口连通于所述换向装置的第三阀口，所述液压驱动件的出油口连通于所述换向装置的第四阀口。
  10. 根据权利要求9所述的液压控制系统，其中，
    所述换向装置为二位四通电磁换向阀；或
    所述换向装置为二位四通液控换向阀；或
    所述换向装置包括：
    第一供油路，所述第一供油路的一端连通于所述第一阀口，另一端连通于所述第三阀口，所述第一供油路上设置有第一单向阀，所述第一单向阀的进口连通所述第一阀口；
    第二供油路，所述第二供油管路的一端连通于所述第二阀口，另一端连通于所述第三阀口，所述第二供油路设置有第二单向阀，所述第二单向阀的进口连通于所述第二阀口；
    第一回油路，所述第一回油路一端连通于所述第一阀口，另一端连通于所述第四阀口，所述第一回油路上设置有第三单向阀，所述第三单向阀的进口连通于所述第四阀口；
    第二回油路，所述第二回油路一端连通于所述第二阀口，另一端连通于所述第四阀口，所述第二回油路上设置有第四单向阀，所述第四单向阀的进口连通于所述第四阀口。
  11. 根据权利要求9或10所述的液压控制系统，其中，在所述第一环形槽和所述第二环形槽设置在所述第二回转体上，所述第一回转体上还设置有第三油道和第四油道，所述第三油道连通于第一环形槽和所述第二环形槽中的一者，所述第四油道连通于第一环形槽和所述第二环形槽中的另 一者的情况下，还包括：
    第七换向阀，设置在所述中心回转接头和所述换向装置之间，所述第七换向阀的第一执行阀口连通于所述第一油道，所述第七换向阀的第二执行阀口连通于所述第三油道，所述第七换向阀的出油阀口连通于所述换向装置的第一阀口；
    第八换向阀，设置在所述中心回转接头和所述换向装置之间，所述第八换向阀的第一执行阀口连通于所述第二油道，所述第八换向阀的第二执行阀口连通于所述第四油道，所述第八换向阀的出油阀口连通于所述换向装置的第二阀口；
    第五感应器，连接于所述第一油道和第三油道，用以获取第一油道和第三油道内的第五油压信息；
    第六感应器，连接于所述第二油道和第四油道，用以获取第二油道和第四油道内的第六油压信息；
    第三控制器，连接于所述第五感应器和所述第六感应器，所述第三控制器用于在所述第五油压信息异常的情况下控制所述第七换向阀换向，在所述第六油压信息异常的情况下控制所述第八换向阀换向；或
    在所述第一环形槽和所述第二环形槽设置在所述第一回转体上，所述第二回转体上还设置有第三油口和第四油口，所述第三油口连通于第一环形槽和所述第二环形槽中的一者，所述第四油口连通于第一环形槽和所述第二环形槽中的另一者的情况下，还包括：
    第九换向阀，所述第九换向阀的第一执行阀口连通于所述第一油口，第九换向阀的第二执行阀口连通于所述第三油口；
    第十换向阀，所述第十换向阀的第一执行阀口连通于所述第二油口，第十换向阀的第二执行阀口连通于所述第四油口；
    其中，所述第九换向阀的进油阀口或所述第十换向阀的进油阀口连通于油源；
    第七感应器，连接于所述第一油口和第三油口，用以获取第一油口和第三油口内的第七油压信息；
    第八感应器，连接于所述第二油口和第四油口，用以获取第二油口和 第四油口内的第八油压信息；
    第四控制器，连接于所述第七感应器和所述第八感应器，所述第四控制器用于在所述第七油压信息异常的情况下控制所述第九换向阀换向，在所述第八油压信息异常的情况下控制所述第十换向阀换向。
  12. 一种作业车辆，其中，包括：
    液压油泵；
    如权利要求6或7所述的液压控制系统，所述液压油泵通过供油路连通于所述中心回转接头的第一油道或第二油道；或
    如权利要求8所述的液压控制系统，所述液压油泵通过供油路连通于所述第四换向阀的进油阀口或所述第三换向阀的进油阀口；或
    如权利要求9或10所述的液压控制系统，所述液压油泵通过供油路连通于所述中心回转接头的第一油口或第二油口；或
    如权利要求11所述的液压控制系统，所述液压油泵通过供油路连通于所述第九换向阀的进油阀口或所述第十换向阀的进油阀口；
    执行件，连接于所述液压驱动件。
  13. 根据权利要求12所述的作业车辆，其中，还包括：
    第一换向阀，设置在所述供油路上，所述液压油泵连通于所述第一换向阀的进油阀口；
    其中，在所述作业车辆包括如权利要求6或7所述的液压控制系统的情况下，所述第一换向阀的第一执行阀口连通于所述第一油道，所述第一换向阀的第二执行阀口连通于所述第二油道；在所述作业车辆包括如权利要求8所述的液压控制系统的情况下，所述第一换向阀的第一执行阀口连通于所述第四换向阀的进油阀口，所述第一换向阀的第二执行阀口连通于第三换向阀的进油阀口；在所述作业车辆包括如权利要求9或10所述的液压控制系统的情况下，所述第一换向阀的第一执行阀口连通于所述第一油口，所述第一换向阀的第二执行阀口连通于所述第二油口；在所述作业车辆包括如权利要求11所述的液压控制系统的情况下，所述第一换向阀的第一执行阀口连通于所述第九换向阀的进油阀口，所述第一换向阀的第二执行阀口连通于所述第十换向阀的进油阀口；
    和/或
    回转马达，通过驱动油路连通于所述液压油泵，用于驱动所述第一回转体与所述第二回转体之间的相对转动；
    第二换向阀，液压油泵连通于所述第二换向阀的进油阀口，所述第二换向阀的第一执行阀口连通于所述回转马达的第一执行阀口，所述回转马达的第二执行阀口连通于所述第二换向阀的第二执行阀口。
PCT/CN2020/110708 2020-07-31 2020-08-24 中心回转接头、液压控制系统和作业车辆 WO2022021517A1 (zh)

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