CN112855666B - Loading oil way and loading test oil way - Google Patents

Loading oil way and loading test oil way Download PDF

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Publication number
CN112855666B
CN112855666B CN202110006609.XA CN202110006609A CN112855666B CN 112855666 B CN112855666 B CN 112855666B CN 202110006609 A CN202110006609 A CN 202110006609A CN 112855666 B CN112855666 B CN 112855666B
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China
Prior art keywords
oil
port
loading
control valve
pressure
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CN202110006609.XA
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CN112855666A (en
Inventor
唐生霞
陈庚
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Zoomlion Heavy Industry Science and Technology Co Ltd
Shaanxi Zoomlion West Earthmoving Machinery Co Ltd
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Zoomlion Heavy Industry Science and Technology Co Ltd
Shaanxi Zoomlion West Earthmoving Machinery Co Ltd
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Priority to CN202110006609.XA priority Critical patent/CN112855666B/en
Publication of CN112855666A publication Critical patent/CN112855666A/en
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    • 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
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more 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
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • 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
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/149—Fluid interconnections, e.g. fluid connectors, passages

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

The invention relates to the technical field of test loading, and discloses a loading oil way and a loading test oil way. The loading part first oil path comprises a first oil inlet control valve and a first oil outlet control valve which are connected between the first oil port and the first loading part connecting port and connected in parallel, the loading part second oil path comprises a second oil inlet control valve and a second oil outlet control valve which are connected between the second oil port and the second loading part connecting port and connected in parallel, and the first oil port is communicated with the second oil port, so that the loading oil path is simple in structure, and in actual use, stable and reliable loading test of a tested piece can be realized after the loading part and the tested piece are connected.

Description

Loading oil way and loading test oil way
Technical Field
The invention relates to the technical field of test loading, in particular to a loading oil way and a loading test oil way.
Background
At present, the performance of a tested piece needs to be frequently subjected to a load test so as to detect whether the performance of the tested piece can meet the required requirements.
In the prior art, a loading part is connected with a tested part, the loading part is connected with a loading system, the loading system comprises one set of independent hydraulic pump source, the tested part is connected with a loaded system, and the loaded system comprises another set of independent hydraulic pump source. The independent hydraulic pump sources generally include a power device, a hydraulic pump, various control valves, and the like, and the power device may be a motor or other power mechanism such as a diesel engine, which form a set of independent hydraulic pump sources. During loading, after the power device is started, the hydraulic pump is driven to operate, the hydraulic pump provides hydraulic energy (pressure and flow) for the loading system, the hydraulic energy is converted into mechanical energy through the loading cylinder, namely, the mechanical energy is output as forces with different sizes and speeds, and the mechanical energy can drive a tested piece to correspondingly move so as to test the performance of the tested piece.
Therefore, the loading system and the loaded system are two independent systems, thereby making the loading test loop complicated.
Disclosure of Invention
In view of this, the present invention provides a loading oil path, which has a simple structure and can realize a stable and reliable loading test of a tested piece after being connected with a loading piece and the tested piece in actual use.
In order to achieve the above object, the present invention provides a loading oil path, where the loading oil path is used for performing a loading test on a tested piece, and the loading oil path includes: the first loading part first oil path comprises a first oil port and a first loading part connecting port which is used for being communicated with the first connecting port of the loading part, and the first loading part first oil path comprises a first oil inlet control valve and a first oil outlet control valve which are connected between the first oil port and the first loading part connecting port in parallel; a second loader second oil passage including a second oil port and a second loader connecting port for communicating with a second connecting port of the loader, the second loader second oil passage including a second oil inlet control valve and a second oil outlet control valve connected between the second oil port and the second loader connecting port and connected in parallel; wherein the first oil port and the second oil port are in communication; wherein the first oil outlet control valve is configured to be openable when first pressure oil that is pressure-discharged from the first connection port and that enters the first oil passage of the loading member through the first loading member connection port reaches a first opening pressure, and the second oil inlet control valve is configured to allow the first pressure oil to pass and flow from the second loading member connection port into the second connection port; wherein the second oil outlet control valve is adapted to be openable when second pressure oil that is pressure-discharged from the second connection port and that enters the second oil passage of the loader through the second loader connection port reaches a second opening pressure, and the first oil inlet control valve is adapted to allow the second pressure oil to pass and flow from the first loader connection port into the first connection port.
In this aspect, the first loading member oil passage includes a first oil inlet control valve and a first oil outlet control valve that are connected in parallel between the first oil port and the first loading member connection port, the second loading member oil passage includes a second oil inlet control valve and a second oil outlet control valve that are connected in parallel between the second oil port and the second loading member connection port, and the first oil port and the second oil port are communicated, so that the loading oil passage is simple in structure. In practical use, when a loading test is required, the first loading part connecting port can be communicated with the first connecting port of the loading part, the second loading part connecting port can be communicated with the second connecting port of the loading part, the loading part and the loading oil path are filled with hydraulic oil, and the loading part and the tested part are in power transmission connection, so that when the tested part moves forward to drive the loading part to move forward, first pressure oil in the loading part is discharged under pressure to enter the first oil path of the loading part from the first connecting port and the first loading part connecting port, high pressure is generated in the first oil path of the loading part due to incompressibility of the first pressure oil, the generated high pressure can be controlled by the first oil outlet control valve to generate forward loading force of the tested part, and therefore, the first oil outlet control valve can be opened when the first pressure oil reaches a first opening pressure, at the same time, the pressure at the second connecting port of the loading member is reduced, so that the second oil inlet control valve can allow the first pressure oil to pass through and flow from the second loading member connecting port into the second connecting port to be replenished into the loading member. Correspondingly, when the tested piece reversely acts to drive the loading piece to reversely act, the second pressure oil in the loading piece is discharged under pressure to enter the second oil path of the loading piece from the second connecting port and the second loading piece connecting port, and high pressure is generated in the second oil path of the loading piece due to the incompressibility of the second pressure oil, and the generated high pressure can be controlled by the second oil outlet control valve, so that the reverse loading force of the tested piece is generated. Therefore, the loading oil way can realize the stable and reliable loading test of the tested piece after being connected with the loading piece and the tested piece in the actual use.
In addition, the charging oil passage includes an oil inlet port for opening and closing, the oil inlet port being simultaneously communicated with the first oil port and the second oil port.
Further, the loading oil path comprises an oil inlet on-off control valve, and the oil inlet on-off control valve is communicated with the oil inlet port.
Furthermore, in the oil inlet direction of the oil inlet on-off control valve, the loading oil path comprises a pressure detection piece for detecting the pressure of the oil path at the downstream of the oil inlet on-off control valve, and the oil inlet on-off control valve can be opened when the pressure of the oil path detected by the pressure detection piece is smaller than a set value so as to supplement oil to the loading oil path.
Further, the charging oil passage includes an oil tank for supplying oil.
Furthermore, the oil tank is a high-level oil tank which is used for supplying oil by utilizing the gravity of oil.
Further, the volume of the oil tank is set to be equal to the sum of the oil path internal volume of the loading oil path and the oil path internal volume of the loading piece for connection.
In addition, a first opening pressure of the first oil outlet control valve can be adjusted, and/or a second opening pressure of the second oil outlet control valve can be adjusted.
Further, the first oil outlet control valve can be controlled proportionally, and/or the second oil outlet control valve can be controlled proportionally.
In addition, the first oil outlet control valve is an overflow valve, and/or the second oil outlet control valve is an overflow valve.
In addition, the first oil inlet control valve is a first oil inlet check valve, and/or the second oil inlet control valve is a second oil inlet check valve.
In addition, the charging oil path includes a first pressure detecting member for detecting an oil inlet side pressure of the first oil outlet control valve; and/or the loading oil circuit comprises a second pressure detection piece for detecting the oil inlet side pressure of the second oil outlet control valve.
Further, the first pressure detection part is used for outputting a pressure signal capable of representing a pressure change curve in the loading test process; and/or the second pressure detection piece is used for outputting a pressure signal which can represent a pressure change curve in the loading test process.
In addition, the loading oil path comprises a loading piece which is used for being in power transmission connection with the tested piece, the loading piece comprises a first connecting port and a second connecting port, the first connecting port is communicated with the first loading piece connecting port, and the second connecting port is communicated with the second loading piece connecting port.
Further, the loading part is a loading oil cylinder, wherein a rod cavity of the loading oil cylinder comprises the first connecting port, and a rodless cavity of the loading oil cylinder comprises the second connecting port.
Further, the loading piece is a loading hydraulic motor.
In addition, the invention provides a loading test oil path, which comprises a tested piece, a loading piece and the loading oil path, wherein the tested piece and the loading piece are in power transmission connection and have the same motion mode; the loading piece comprises a first connecting port and a second connecting port, the first connecting port is communicated with the first loading piece connecting port, and the second connecting port is communicated with the second loading piece connecting port.
Therefore, as described above, the loading oil path can realize the stable and reliable loading test of the tested piece.
Furthermore, the loading test oil path comprises a reversing valve, the reversing valve comprises an oil inlet P, an oil return port T, a first working oil port A and a second working oil port B, the oil inlet P is communicated with the first working oil port A in a first working position of the reversing valve, the oil return port T is communicated with the second working oil port B, the oil inlet P is communicated with the second working oil port B in a second working position of the reversing valve, and the oil return port T is communicated with the first working oil port A; and the first working oil port A and the second working oil port B of the reversing valve are respectively communicated with the first connecting interface and the second connecting interface of the tested piece.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic diagram of a loading test oil path according to an embodiment of the present invention, in which a schematic diagram of a loading oil path according to an embodiment of the present invention is shown.
Description of reference numerals:
1-a loading part first oil path, 2-a first oil port, 3-a tested part, 4-a first loading part connecting port, 5-a first oil inlet control valve, 6-a first oil outlet control valve, 7-a loading part second oil path, 8-a second oil port, 9-a second loading part connecting port, 10-a second oil inlet control valve, 11-a second oil outlet control valve, 12-an oil inlet port, 13-an oil inlet on-off control valve, 14-an oil tank, 15-a first pressure detecting part, 16-a second pressure detecting part, 17-a loading oil cylinder, 18-a loading oil cylinder rod cavity, 19-a loading oil cylinder rodless cavity, 20-a loading oil path, 21-a reversing valve, 22-a tested oil cylinder rodless cavity and 23-a tested oil cylinder rod cavity.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation. In addition, it should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1, the loading oil path provided by the present invention is used for loading a tested piece 3, and the loading oil path includes a loading piece first oil path 1 and a loading piece second oil path 7, wherein the loading piece first oil path 1 includes a first oil port 2 and a first loading piece connection port 4 for communicating with the first connection port of the loading piece, the loading piece first oil path 1 includes a first oil inlet control valve 5 and a first oil outlet control valve 6 connected between the first oil port 2 and the first loading piece connection port 4 in parallel, the loading piece second oil path 7 includes a second oil port 8 and a second loading piece connection port 9 for communicating with the second connection port of the loading piece, and the loading piece second oil path 7 includes a second oil inlet control valve 10 and a second oil outlet control valve 11 connected between the second oil port 8 and the second loading piece connection port 9 in parallel; wherein the first oil port 2 and the second oil port 8 are communicated; the first oil outlet control valve 6 is used for being opened when first pressure oil which is discharged from the first connecting port in a pressurized mode and enters the first oil path 1 of the loading part through the first loading part connecting port 4 reaches a first opening pressure, and the second oil inlet control valve 10 is used for enabling the first pressure oil to pass through and flow into the second connecting port from the second loading part connecting port 9; wherein the second oil outlet control valve 11 is adapted to be openable when second pressure oil that is pressure-discharged from the second connecting port and that enters the loader second oil passage 7 through the second loader connecting port 9 reaches a second opening pressure, and the first oil inlet control valve 5 is adapted to allow the second pressure oil to pass and flow from the first loader connecting port 4 into the first connecting port.
In this aspect, the first loading member oil passage includes a first oil inlet control valve and a first oil outlet control valve that are connected in parallel between the first oil port and the first loading member connection port, the second loading member oil passage includes a second oil inlet control valve and a second oil outlet control valve that are connected in parallel between the second oil port and the second loading member connection port, and the first oil port and the second oil port are communicated, so that the loading oil passage is simple in structure. In practical use, when a loading test is required, the first loading part connecting port can be communicated with the first connecting port of the loading part, the second loading part connecting port can be communicated with the second connecting port of the loading part, the loading part and the loading oil path are filled with hydraulic oil, and the loading part and the tested part are in power transmission connection, so that when the tested part moves forward to drive the loading part to move forward, first pressure oil in the loading part is discharged under pressure to enter the first oil path of the loading part from the first connecting port and the first loading part connecting port, high pressure is generated in the first oil path of the loading part due to incompressibility of the first pressure oil, the generated high pressure can be controlled by the first oil outlet control valve to generate forward loading force of the tested part, and therefore, the first oil outlet control valve can be opened when the first pressure oil reaches a first opening pressure, at the same time, the pressure at the second connecting port of the loading member is reduced, so that the second oil inlet control valve can allow the first pressure oil to pass through and flow from the second loading member connecting port into the second connecting port to be replenished into the loading member. Correspondingly, when the tested piece reversely acts to drive the loading piece to reversely act, the second pressure oil in the loading piece is discharged under pressure to enter the second oil path of the loading piece from the second connecting port and the second loading piece connecting port, and high pressure is generated in the second oil path of the loading piece due to the incompressibility of the second pressure oil, and the generated high pressure can be controlled by the second oil outlet control valve, so that the reverse loading force of the tested piece is generated. Therefore, the loading oil way can realize the stable and reliable loading test of the tested piece after being connected with the loading piece and the tested piece in the actual use.
In the charging oil passage, in one embodiment, the first oil port 2 and the second oil port 8 may be connected by a connecting pipeline, that is, one end port of the connecting pipeline is connected to the first oil port 2, and the other end port of the connecting pipeline is connected to the second oil port 8, and besides, no other additional interface is provided on the connecting pipeline. Alternatively, in another embodiment, referring to fig. 1, the charging oil path includes an oil inlet port 12 for opening and closing, and the oil inlet port 12 communicates with both the first oil port 2 and the second oil port 8, for example, the charging oil path may include a three-way joint, a first port of the three-way joint is connected with the first oil port 2, a second port of the three-way joint is connected with the second oil port 8, and a third port of the three-way joint is used as the oil inlet port 12. Alternatively, a bypass pipe may be extended from the connection line between the first oil port 2 and the second oil port 8 as the oil inlet port 12. In this way, hydraulic oil can be input into the first oil path 1 and the second oil path 7 of the loading element through the oil inlet port 12, and of course, the oil inlet port 12 can be kept closed during the oil flow process of the forward loading test and the reverse loading test. In addition, if necessary, oil can be replenished into the first loading element oil passage 1 and the second loading element oil passage 7 through the oil inlet port 12.
In addition, in one embodiment, the inlet port 12 may be connected to an oil outlet connection of the tank, and the oil outlet connection of the tank may be closed during the oil flow in the forward loading test and the reverse loading test to interrupt the oil flow between the inlet port 12 and the tank.
In addition, in other embodiments, referring to fig. 1, the loading oil path includes an oil inlet on-off control valve 13, and the oil inlet on-off control valve 13 is communicated with the oil inlet port 12, so that when hydraulic oil is input into the loading member first oil path 1 and the loading member second oil path 7, the oil inlet on-off control valve 13 can be opened. And the oil inlet on-off control valve 13 can be closed during the oil flow in the forward loading test and the reverse loading test.
In addition, the oil-feed on-off control valve 13 may have various types, and for example, the oil-feed on-off control valve 13 may be a manual on-off valve, or may be an electromagnetic on-off valve.
In addition, in the oil inlet direction of the oil inlet on-off control valve 13, the loading oil path includes a pressure detection element (not shown in the figure) for detecting the pressure of the oil path downstream of the oil inlet on-off control valve 13, and the oil inlet on-off control valve 13 can be opened when the pressure of the oil path detected by the pressure detection element is smaller than a set value, so as to supplement oil to the loading oil path. For example, the operator can open the oil-intake on-off control valve 13 according to the oil passage pressure detected and displayed by the pressure detecting member. Alternatively, the oil inlet on-off control valve 13 may be an electric control valve, an oil passage pressure signal detected by a pressure detecting member such as a pressure sensor may be transmitted to the controller, and the controller may control the electric control valve to open according to the oil passage pressure signal so as to replenish oil to the loading oil passages such as the loading member first oil passage 1 and the loading member second oil passage 7.
Further, referring to fig. 1, the loading oil passage includes an oil tank 14 for supplying oil, so that the oil in the oil tank 14 is supplied to the loading member first oil passage 1 and the loading member second oil passage 7, or hydraulic oil is supplemented to the loading member first oil passage 1 and the loading member second oil passage 7 as needed.
In addition, the oil in the tank 14 may be supplied to the inlet port 12 by the hydraulic pump and forcibly replenished to the inlet port 1. Alternatively, referring to fig. 1, the tank 14 is a high-level tank for supplying oil by gravity, for example, the tank 14 may be disposed at a high level with respect to the loading member. Thus, for example, the oil in the high-level oil tank can flow into the first loading part oil path 1 and the second loading part oil path 7 through the opened oil inlet on-off control valve by using the gravity of the oil, and when the oil inlet on-off control valve is closed, the oil in the high-level oil tank is prevented from continuously flowing into the first loading part oil path 1 and the second loading part oil path 7 by using the gravity of the oil. Of course, if necessary, the oil inlet on-off control valve can be opened, so that the hydraulic oil in the oil tank is supplemented into the first loading part oil path 1 and the second loading part oil path 7 by using the gravity of the oil.
In addition, the tank 14 may have a larger volume to accommodate a greater amount of oil. Alternatively, the volume of the oil tank 14 is set equal to the sum of the oil path internal volume of the loading oil path and the oil path internal volume of the loading member for connection. As used herein, the term "equal" may be the same or slightly larger, that is, the volume of the oil tank 14 is set to be slightly larger or slightly larger than the sum of the internal volume of the oil path of the charging oil path and the internal volume of the oil path of the charging member for connection. Therefore, the size of the oil tank can be further reduced, and the complexity and the cost of loading oil paths can be effectively reduced.
In addition, the first opening pressure of the first oil outlet control valve 6 may be a fixed value to realize a load test of a rated load, or the first opening pressure of the first oil outlet control valve 6 may be adjusted, so that load test requirements of different loads may be realized.
In addition, the second opening pressure of the second oil outlet control valve 11 may be a fixed value to realize the load test of the rated load, or the second opening pressure of the second oil outlet control valve 11 may be adjusted, so that the load test requirements of different loads may be realized.
Of course, the first opening pressure of the first outlet control valve 6 may be adjusted manually or by a plurality of pressure steps. Alternatively, the first outlet control valve 6 may be proportional controlled, for example a proportional valve, so that a stepless, different level of accuracy of the load force setting is achieved.
Of course, the second opening pressure of the second outlet control valve 11 may be adjusted manually or by a plurality of pressure steps. Alternatively, the second outlet control valve 11 may be proportional controlled, for example, a proportional valve, so that a stepless, different level of accuracy of the load force setting may be achieved.
In addition, the first oil outlet control valve 6 may have various types. For example, the first outlet control valve 6 may be a relief valve, which may have a certain rated first opening pressure, or a first opening pressure with a plurality of pressure steps.
In addition, the second oil outlet control valve 11 may have various types. For example, the second outlet control valve 11 may be a relief valve that may have a certain rated first opening pressure, or a first opening pressure having a plurality of pressure steps.
In addition, the first oil feed control valve 5 may have a plurality of types as long as it can achieve separate oil feeding. For example, the first oil feed control valve 5 may be an on-off valve that is opened when oil feed is required and may be closed during a forward loading test. Or, referring to fig. 1, the first oil inlet control valve 5 is a first oil inlet check valve, so that the first oil inlet check valve may only allow oil inlet, and oil may only flow through the first oil outlet control valve 6 during a forward loading test, so that the loading oil path may have a simpler structure and may conveniently implement one-way oil inlet control.
In addition, the second oil feed control valve 10 may have a plurality of types as long as the single oil feed can be achieved. For example, the second oil feed control valve 10 may be an on-off valve that is opened when oil feed is required and closed during a reverse loading test. Or, referring to fig. 1, the second oil inlet control valve 10 is a second oil inlet check valve, so that the second oil inlet check valve may only allow oil inlet, and oil may only flow through the second oil outlet control valve 11 during a reverse loading test, so that the loading oil path may have a simpler structure and may conveniently implement one-way oil inlet control.
Further, referring to fig. 1, the charging oil path includes a first pressure detecting member 15 for detecting the oil-inlet-side pressure of the first outlet control valve 6, so that the operator can easily know the first opening pressure. In addition, the operator can adjust the first opening pressure by the first pressure detection member 15. Of course, the first pressure detection member 15 may be a pressure gauge or a pressure sensor.
Further, referring to fig. 1, the charging oil path includes a second pressure detecting member 16 for detecting the oil-inlet-side pressure of the second outlet control valve 11, so that the operator can easily know the second opening pressure. In addition, the operator can adjust the second opening pressure by means of the second pressure detection member 16. Of course, the second pressure detecting member 16 may be a pressure gauge or a pressure sensor.
In addition, in an embodiment, the first pressure detecting element 15 is configured to output a pressure signal that can represent a pressure variation curve during the loading test, so that an operator can know the pressure variation during the loading test in real time, so as to perform the loading test more comprehensively.
In addition, in one embodiment, the second pressure detecting element 16 is used for outputting a pressure signal representing a pressure variation curve during the loading test, so that the operator can know the pressure variation during the loading test in real time, so as to perform the loading test more comprehensively.
In addition, the loading oil path may not include a loading member and, in actual use, is connected to the loading member. Alternatively, referring to fig. 1, the loading oil path includes a loading member for power transmission connection with the tested member 3, and the loading member includes a first connection port and a second connection port, wherein the first connection port is communicated with the first loading member connection port 4, and the second connection port is communicated with the second loading member connection port 9. Thus, in actual use, the loading member and the test object 3 need only be connected in a power transmission manner.
Of course, the loader can be of various types, for example, one type, referring to fig. 1, the loader is a loader cylinder 17, wherein the loader cylinder rod chamber 18 of the loader cylinder 17 includes a first connection port and the loader cylinder rodless chamber 19 of the loader cylinder 17 includes a second connection port. At this time, the tested piece may be a tested cylinder, and the tested cylinder includes a tested cylinder rodless chamber 22 and a tested cylinder rod chamber 23. Of course, the piston rod of the load cylinder 17 and the piston rod of the cylinder under test may be connected directly or through other intermediate structures such as an intermediate universal joint. Alternatively, in another type, the loading member is a loading hydraulic motor, and in this case, the tested member may be a tested hydraulic motor, so that the output rotating shaft of the loading hydraulic motor and the output rotating shaft of the tested hydraulic motor may be directly connected or connected through another intermediate structure such as an intermediate universal joint.
Furthermore, the present invention provides a loading test oil path, referring to fig. 1, comprising a tested piece 3, a loading piece and the loading oil path 20 described in any of the above, wherein the tested piece 3 and the loading piece are in power transmission connection and have the same motion pattern, for example, the tested piece 3 and the loading piece both move or both rotate; the loading member includes a first connection port communicating with the first loading member connection port 4 and a second connection port communicating with the second loading member connection port 9. Therefore, as above, the loading oil path can realize the stable and reliable loading test of the tested piece.
In addition, the number of the loading member and the test piece 3 may be one or more.
In addition, referring to fig. 1, in an embodiment, the load test oil path includes a reversing valve 21, the reversing valve 21 includes an oil inlet P, an oil return port T, a first working oil port a and a second working oil port B, the oil inlet P is communicated with the first working oil port a and the oil return port T is communicated with the second working oil port B in a first working position of the reversing valve 21, and the oil inlet P is communicated with the second working oil port B and the oil return port T is communicated with the first working oil port a in a second working position of the reversing valve 21; the first working oil port a and the second working oil port B of the reversing valve 21 are respectively communicated with the first connecting interface and the second connecting interface of the tested piece 3. Thus, the forward loading test and the reverse loading test can be conveniently carried out through the first working position and the second working position of the reversing valve 21.
In the embodiment shown in fig. 1, when the direction-changing valve is in the left position, the piston of the tested cylinder moves to the right to drive the piston of the loading cylinder 17 to move to the right, and the oil is incompressible, so that the oil in the rod-free chamber 19 of the loading cylinder 17 generates high pressure, and the generated pressure can be set by the second oil outlet control valve 11 (for example, the generated pressure can be observed by a second pressure detecting element 16 such as a pressure gauge), that is, the loading force of the tested cylinder is generated, and meanwhile, during the process that the piston of the loading cylinder 17 moves to the right, the pressure in the rod chamber 18 of the loading cylinder becomes small, even vacuum is generated, and at this time, the oil overflowing from the second oil outlet control valve 11 is supplemented to the rod chamber 18 of the loading cylinder through the first oil inlet control valve 5.
When the reversing valve is in the right position, the piston of the tested oil cylinder moves to the left, oil liquid in the rod cavity 18 of the loading oil cylinder 17 generates high pressure, the generated pressure is set by the first oil outlet control valve 6 (for example, the generated pressure can be observed by a first pressure detection part 15 such as a pressure gauge), namely, the loading force of the tested oil cylinder is generated, meanwhile, in the process that the piston of the loading oil cylinder 17 moves to the left, the pressure in the rodless cavity 19 of the loading oil cylinder is reduced, even vacuum is generated, and at the moment, the oil liquid overflowing from the first oil outlet control valve 6 is supplemented to the rodless cavity 19 of the loading oil cylinder through the second oil inlet control valve 10.
Therefore, in the process of realizing the loading test, the cyclic recycling of the oil can be realized, and the loading test cost is reduced.
In addition, if needed, other components can be additionally arranged on the loading test oil way, so that the loading test oil way has more functions or is more convenient to operate, and the loading test oil way can be controlled electrically, locally, remotely or remotely and the like.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims (18)

1. A loading oil path is used for loading and testing a tested piece (3), and comprises:
a first loader oil path (1), wherein the first loader oil path (1) comprises a first oil port (2) and a first loader connecting port (4) communicated with the first loader connecting port, and the first loader oil path (1) comprises a first oil inlet control valve (5) and a first oil outlet control valve (6) which are connected between the first oil port (2) and the first loader connecting port (4) in parallel;
a second loader oil passage (7), the second loader oil passage (7) including a second oil port (8) and a second loader connection port (9) for communicating with the second connection port of the loader, the second loader oil passage (7) including a second oil inlet control valve (10) and a second oil outlet control valve (11) connected between the second oil port (8) and the second loader connection port (9) and connected in parallel;
wherein the first oil port (2) and the second oil port (8) are in communication;
wherein the first oil outlet control valve (6) is adapted to be openable when first pressure oil, which is pressure-discharged from the first connection port and enters the loader first oil passage (1) through the first loader connection port (4), reaches a first opening pressure, and the second oil inlet control valve (10) is adapted to allow the first pressure oil to pass and flow from the second loader connection port (9) into the second connection port;
wherein the second oil outlet control valve (11) is adapted to be openable when second pressure oil that is pressure-discharged from the second connection port and that enters the loader second oil passage (7) through the second loader connection port (9) reaches a second opening pressure, and the first oil inlet control valve (5) is adapted to allow the second pressure oil to pass and flow from the first loader connection port (4) into the first connection port.
2. The charging circuit according to claim 1, characterized in that it comprises an oil inlet port (12) for opening and closing, said oil inlet port (12) communicating with both said first oil port (2) and said second oil port (8).
3. The loading oil circuit according to claim 2, characterized in that the loading oil circuit comprises an oil inlet on-off control valve (13), and the oil inlet on-off control valve (13) is communicated with the oil inlet port (12).
4. The loading oil circuit according to claim 3, wherein in the oil inlet direction of the oil inlet on-off control valve (13), the loading oil circuit comprises a pressure detection part for detecting the pressure of an oil circuit downstream of the oil inlet on-off control valve (13), and the oil inlet on-off control valve (13) can be opened to supplement oil to the loading oil circuit when the pressure of the oil circuit detected by the pressure detection part is smaller than a set value.
5. The charging circuit according to claim 2, characterized in that it comprises a tank (14) for supplying oil.
6. The charging circuit according to claim 5, characterized in that the tank (14) is a high-level tank for oil supply by gravity of oil.
7. The charging oil passage according to claim 5, wherein a volume of the oil tank (14) is set equal to a sum of an oil passage internal volume of the charging oil passage and an oil passage internal volume of the charging member for connection.
8. The charging circuit according to claim 1, characterized in that a first opening pressure of the first outlet control valve (6) is adjustable, and/or a second opening pressure of the second outlet control valve (11) is adjustable.
9. The charging circuit according to claim 8, characterized in that the first outlet control valve (6) is capable of proportional control and/or the second outlet control valve (11) is capable of proportional control.
10. The charging circuit according to claim 1, characterized in that the first outlet control valve (6) is a relief valve and/or the second outlet control valve (11) is a relief valve.
11. The charging circuit according to claim 1, characterized in that the first inlet control valve (5) is a first inlet check valve and/or the second inlet control valve (10) is a second inlet check valve.
12. The charging circuit according to claim 1, characterized in that it comprises a first pressure detecting member (15) for detecting an oil-in side pressure of the first oil outlet control valve (6);
and/or the presence of a gas in the gas,
the charging oil path includes a second pressure detecting member (16) for detecting an oil inlet side pressure of the second oil outlet control valve (11).
13. The charging circuit according to claim 12, characterized in that the first pressure detection member (15) is configured to output a pressure signal indicative of a pressure profile during a charging test; and/or the second pressure detection element (16) is used for outputting a pressure signal which can represent a pressure change curve in the loading test process.
14. The charging oil circuit according to any one of claims 1 to 13, characterized in that the charging oil circuit comprises a charging member for power transmission connection with a tested member (3), the charging member comprises a first connection port and a second connection port, wherein the first connection port communicates with the first charging member connection port (4), and the second connection port communicates with the second charging member connection port (9).
15. The charging circuit according to claim 14, characterized in that the load is a charging cylinder (17), wherein the charging cylinder rod chamber (18) of the charging cylinder (17) comprises the first connection port and the charging cylinder rodless chamber (19) of the charging cylinder (17) comprises the second connection port.
16. The charging circuit of claim 14, wherein the charging member is a charging hydraulic motor.
17. A loading test oil path, characterized by comprising a piece to be tested (3), a loading piece and the loading oil path (20) according to any one of claims 1 to 16,
the tested piece (3) and the loading piece are in power transmission connection and have the same motion mode;
the loading piece comprises a first connecting port and a second connecting port, the first connecting port is communicated with the first loading piece connecting port (4), and the second connecting port is communicated with the second loading piece connecting port (9).
18. The loading test oil way according to claim 17, wherein the loading test oil way comprises a reversing valve (21), the reversing valve (21) comprises an oil inlet P, an oil return port T, a first working oil port a and a second working oil port B, the oil inlet P is communicated with the first working oil port a in a first working position of the reversing valve (21), the oil return port T is communicated with the second working oil port B, the oil inlet P is communicated with the second working oil port B in a second working position of the reversing valve (21), and the oil return port T is communicated with the first working oil port a;
the first working oil port A and the second working oil port B of the reversing valve (21) are respectively communicated with the first connecting interface and the second connecting interface of the tested piece (3).
CN202110006609.XA 2021-01-05 2021-01-05 Loading oil way and loading test oil way Active CN112855666B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040084499A (en) * 2003-03-28 2004-10-06 학교법인 울산공업학원 hydraulic circuit of active load simulator
CN1821589A (en) * 2006-03-16 2006-08-23 靖江宝骊叉车有限公司 Double action cylinder loading test device
CN101871478A (en) * 2010-07-07 2010-10-27 金碧华 Loading device of hydraulic motor test board
CN202900838U (en) * 2012-10-30 2013-04-24 杭州海聚动力科技有限公司 Bi-directional closed type loading return circuit system in test platform of hydraulic motor
CN204921539U (en) * 2015-08-11 2015-12-30 常州时进精密机械有限公司 Two -way hydraulic motor's test loop system
CN208348186U (en) * 2018-06-20 2019-01-08 西安庆安航空试验设备有限责任公司 A kind of hydraulic motor load automatic voltage regulating system
CN209340268U (en) * 2018-12-06 2019-09-03 哈工新欧(岳阳)测控装备有限公司 Energy-saving large_sized hydraulic cylinder testing stand

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040084499A (en) * 2003-03-28 2004-10-06 학교법인 울산공업학원 hydraulic circuit of active load simulator
CN1821589A (en) * 2006-03-16 2006-08-23 靖江宝骊叉车有限公司 Double action cylinder loading test device
CN101871478A (en) * 2010-07-07 2010-10-27 金碧华 Loading device of hydraulic motor test board
CN202900838U (en) * 2012-10-30 2013-04-24 杭州海聚动力科技有限公司 Bi-directional closed type loading return circuit system in test platform of hydraulic motor
CN204921539U (en) * 2015-08-11 2015-12-30 常州时进精密机械有限公司 Two -way hydraulic motor's test loop system
CN208348186U (en) * 2018-06-20 2019-01-08 西安庆安航空试验设备有限责任公司 A kind of hydraulic motor load automatic voltage regulating system
CN209340268U (en) * 2018-12-06 2019-09-03 哈工新欧(岳阳)测控装备有限公司 Energy-saving large_sized hydraulic cylinder testing stand

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