CN113446279A - High-pressure oil way switching device and hydraulic system - Google Patents

High-pressure oil way switching device and hydraulic system Download PDF

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Publication number
CN113446279A
CN113446279A CN202110740140.2A CN202110740140A CN113446279A CN 113446279 A CN113446279 A CN 113446279A CN 202110740140 A CN202110740140 A CN 202110740140A CN 113446279 A CN113446279 A CN 113446279A
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China
Prior art keywords
oil
valve
channel
way
valve core
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Granted
Application number
CN202110740140.2A
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Chinese (zh)
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CN113446279B (en
Inventor
谯维智
高翔
穆文堪
尚耀星
陆红林
刘晓超
王振宇
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Beihang University
Ningbo Institute of Innovation of Beihang University
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Beihang University
Ningbo Institute of Innovation of Beihang University
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Priority to CN202110740140.2A priority Critical patent/CN113446279B/en
Publication of CN113446279A publication Critical patent/CN113446279A/en
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Publication of CN113446279B publication Critical patent/CN113446279B/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
    • 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
    • F15B13/021—Valves for interconnecting the fluid chambers of an actuator
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
    • F16K11/24—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an electromagnetically-operated valve, e.g. for washing machines
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0263—Construction of housing; Use of materials therefor of lift valves multiple way 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/029—Electromagnetically actuated 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • F16K31/0655—Lift 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0675—Electromagnet aspects, e.g. electric supply therefor

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The application provides a high-pressure oil way switching device and a hydraulic system, wherein the high-pressure oil way switching device comprises a first oil inlet and outlet, a second oil inlet and outlet, a first oil way channel, a second oil way channel, a third oil way channel, a first check valve, a second check valve and an on-off valve; a first channel port of the first oil channel is connected with the first oil inlet and outlet, a second channel port is connected with the first one-way valve, and a third channel port is connected with the on-off valve; a first channel port of the second oil passage is connected with the second oil inlet and outlet, a second channel port is connected with the first check valve, and a third channel port is connected with the second check valve; and a first channel port of the third oil channel is connected with the second one-way valve, and a second channel port is connected with the on-off valve. According to the technical scheme, the switching operation of the hydraulic motor and the hydraulic pump during the reciprocal switching use is more convenient, and the control efficiency of high-pressure oil circuit switching is improved.

Description

High-pressure oil way switching device and hydraulic system
Technical Field
The disclosure relates to the field of hydraulic pressure, in particular to a high-pressure oil way switching device and a hydraulic system.
Background
With the development of industrial automation, intellectualization and integration, more and more hydraulic products use customers to put forward higher requirements on the reliability and safety of a hydraulic system. In actual use, a hydraulic source integrated product needs to use the hydraulic motor and the hydraulic pump in a reciprocal way, namely, when the hydraulic source integrated product is used in a forward direction, the hydraulic source integrated product is used as the hydraulic pump, a high-pressure oil way is used for outputting high-pressure oil, and when the hydraulic source integrated product is used in a reverse direction, the hydraulic source integrated product is used as the hydraulic motor, and the high-pressure oil way is used for inputting high-pressure oil.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present disclosure provides a high-pressure oil passage switching device and a hydraulic system.
In a first aspect of the embodiment of the present application, a high-pressure oil path switching device includes a first oil inlet/outlet, a second oil inlet/outlet, a first oil path channel, a second oil path channel, a third oil path channel, a first check valve, a second check valve, and an on-off valve;
a first channel port of the first oil channel is connected with the first oil inlet and outlet, a second channel port of the first oil channel is connected with the first one-way valve, and a third channel port of the first oil channel is connected with the on-off valve;
a first channel port of the second oil channel is connected with the second oil inlet and outlet, a second channel port of the second oil channel is connected with the first one-way valve, and a third channel port of the second oil channel is connected with the second one-way valve, wherein the first one-way valve is constructed in a way that the second oil channel is communicated with the first oil channel in a one-way mode;
and a first channel port of the third oil channel is connected with the second one-way valve, a second channel port of the third oil channel is connected with the on-off valve, the second one-way valve is constructed in a manner that the third oil channel is communicated with the second oil channel in a one-way mode, and the channel valve is used for controlling the on-off of the first oil channel and the third oil channel.
Optionally, the high-pressure oil path switching device further includes a fourth oil inlet and outlet and a fourth oil path channel communicated with the second oil path channel;
and a first channel port of the fourth oil channel is connected with the fourth oil inlet and outlet, and a second channel port of the fourth oil channel is connected with the second one-way valve, so that the third oil channel is in one-way communication with the fourth oil channel.
In a third aspect of the present application, the high-pressure oil passage switching device further includes a third oil inlet and outlet, the third oil passage has a third passage port,
and a third channel port of the third oil channel is connected with the third oil inlet and outlet.
Optionally, the first check valve includes a first oil inlet, a first oil outlet, a first valve body, a first spring and a first valve core;
the first valve body is provided with a first valve core cavity with an opening facing a first oil inlet, and the first valve core cavity is communicated with the first oil outlet and the first oil inlet respectively;
the first valve core is arranged in the first valve core cavity;
the first spring is arranged between the first valve core and the cavity wall of the first valve core cavity and used for driving the first valve core to be attached tightly and sealing the first oil inlet.
Optionally, the second check valve includes a second oil inlet, a second oil outlet, a second valve body, a second spring and a second valve core;
a second valve core cavity with an opening facing a second oil inlet is formed in the second valve body and is communicated with the second oil outlet and the second oil inlet respectively;
the second valve core is arranged in a second valve core cavity;
the second spring is arranged between the second valve core and the cavity wall of the second valve core cavity and used for driving the second valve core to be attached to and seal the second oil inlet.
Optionally, the first valve core cavity, the first valve core, the second valve core cavity and the second valve core are all oval, the outer diameter of the first valve core is the same as the diameter of the first valve core cavity, and the outer diameter of the second valve core is the same as the diameter of the second valve core cavity.
Optionally, the on-off valve includes a valve seat, a return spring, a third valve core and an electromagnetic coil;
the valve seat is provided with a first hole and a second hole;
the electromagnetic coil surrounds the outer side of the third valve core and is used for controlling the third valve core to move to the first position;
the return spring is connected with the third valve core and is used for controlling the third valve core to return to a second position;
when the third valve core is at a first position, the third valve core enables the valve seat to be in a first state, when the third valve core is at a second position, the third valve core enables the valve seat to be in a second state, the first state is that the first hole and the second hole are mutually communicated or disconnected, the second state is that the first hole and the second hole are mutually communicated or disconnected, and the first state is different from the second state.
Optionally, a cavity is arranged on the valve seat;
the third valve element is at least partially arranged in the cavity in a sliding mode;
an oil guide channel is arranged in the third valve element, so that when the third valve element is located at the first position, the oil guide channel is matched with the first hole and the second hole to form an oil path channel, and when the third valve element is located at the second position, the valve element seals the first hole or the second hole.
Optionally, the cavity and the third valve element are both cylindrical, and the outer diameter of the third valve element is the same as the diameter of the cavity.
In a second aspect of the embodiments of the present application, a hydraulic system includes a hydraulic device and the high-pressure oil path switching device according to any one of the first aspect of the embodiments of the present application, where the hydraulic device includes a hydraulic pump or a hydraulic motor, and the high-pressure oil path switching device is connected to the hydraulic device.
The technical scheme of the application can achieve the following beneficial technical effects: adopt the high-pressure oil circuit auto-change over device of this application, can switch the oil circuit passageway when hydraulic motor and hydraulic pump reciprocal switch use through the control of break-make valve for the switching operation when hydraulic motor and hydraulic pump reciprocal switch use is more convenient, improves the control efficiency that the high-pressure oil circuit switches.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
Fig. 1 is a schematic structural diagram of a high-pressure oil path switching device in an embodiment of the present application;
fig. 2 is a schematic oil path control diagram of a high-pressure oil path switching device in an embodiment of the present application.
Detailed Description
The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1 and 2, a high-pressure oil path switching device includes a first oil inlet and outlet 1, a second oil inlet and outlet 2, a first oil path channel 3, a second oil path channel 4, a third oil path channel 5, a first check valve 6, a second check valve 7 and an on-off valve 8;
a first channel port of the first oil channel 3 is connected with the first oil inlet/outlet port 1, a second channel port of the first oil channel 3 is connected with the first check valve 6, and a third channel port of the first oil channel 3 is connected with the on-off valve 8;
a first channel port of the second oil channel 4 is connected with the second oil inlet/outlet 2, a second channel port of the second oil channel 4 is connected with the first check valve 6, and a third channel port of the second oil channel 4 is connected with the second check valve 7, wherein the first check valve 6 is constructed in a way that the second oil channel 4 is communicated with the first oil channel 3 in a single direction;
and a first channel port of the third oil channel 5 is connected with a second one-way valve 7, a second channel port of the third oil channel 5 is connected with an on-off valve 8, wherein the second one-way valve 7 is constructed in a way that the third oil channel 5 is communicated to the second oil channel 4 in a one-way mode, and the channel valve is used for controlling the on-off of the first oil channel 3 and the third oil channel 5.
It can be known that the first oil passage is an oil passage with at least three passage ports, the second oil passage is an oil passage with at least three passage ports, and the second oil passage is an oil passage with at least two passage ports, wherein the passage ports of the same oil passage are communicated with each other;
when the high-pressure oil way switching device in the embodiment of the application is applied to a hydraulic pump or a hydraulic motor, the first oil inlet/outlet 1 is connected with a high-pressure oil way of the system, and the second oil inlet/outlet 2 is connected with a high-pressure oil way of the hydraulic pump or the hydraulic motor.
When the hydraulic pump or the hydraulic motor is used as the hydraulic pump, the on-off valve 8 is controlled to be switched off, so that the first oil path channel 3 is not communicated with the third oil path channel 5, meanwhile, the second one-way valve 7 is constructed in a way that the third oil path channel 5 is communicated with the second oil path channel 4 in one way, and the second oil path channel 4 is not communicated with the third oil path channel 5 because high-pressure oil does not exist in the third oil path channel 5; therefore, high-pressure oil output by the hydraulic pump exerts an acting force on the second one-way valve 7, and when the acting force exceeds a certain value, the second one-way valve 7 is opened, so that a high-pressure oil way of the hydraulic pump flows to a system high-pressure oil way;
when the hydraulic pump or the hydraulic motor is used as the hydraulic motor, the on-off valve 8 is controlled to be opened only, so that the first oil path passage 3 is communicated with the third oil path passage 5, meanwhile, the second check valve 7 is constructed in a way that the third oil path passage 5 is communicated with the second oil path passage 4 in a one-way mode, and because high-pressure oil exists in the third oil path passage 5, the high-pressure oil can cause the second check valve 7 to be opened, so that the second oil path passage 4 is also communicated with the third oil path passage 5; and because the first check valve 6 is constructed in a way that the second oil passage 4 is communicated with the first oil passage 3 in a one-way mode, high-pressure oil of the high-pressure oil passage of the system is blocked by the first check valve 6, so that the high-pressure oil of the high-pressure oil passage of the system sequentially passes through the third high-pressure oil passage and the second high-pressure oil passage from the first high-pressure oil passage and then enters the hydraulic motor.
Therefore, when the high-pressure oil path switching device of the embodiment is implemented, the on-off valve 8 in the high-pressure oil path switching device is controlled to be on or off, so that when the hydraulic motor and the hydraulic pump are switched in a reciprocal manner, corresponding oil path switching control can be realized, and the oil paths are isolated.
As can be seen from the above, the first check valve 6 is used for oil production relative to the hydraulic pump, so the first check valve 6 can be called as an oil production check valve, the second check valve 7 is used for oil feeding relative to the hydraulic motor, and the second check valve 7 can be called as an oil feeding check valve.
In one embodiment, referring to fig. 1 and 2, the high-pressure oil path switching device further includes a fourth oil inlet/outlet 9 and a fourth oil path passage 10 communicating with the second oil path passage 4;
a first channel port of the fourth oil channel 10 is connected with the fourth oil inlet/outlet 9, and a second channel port of the fourth oil channel 10 is connected with the second check valve 7, so that the third oil channel 5 is communicated with the fourth oil channel 10 in a single direction.
It can be known that the fourth oil passage in the present embodiment is an oil passage having at least two passage ports, wherein the passage ports of the same oil passage are communicated with each other.
The high-pressure oil way switching device further comprises a third oil inlet and outlet 11, the third oil way passage 5 is provided with a third passage port, and the third passage port of the third oil way passage 5 is connected with the third oil inlet and outlet 11.
It can be known that the second oil passage in the present embodiment is an oil passage having at least three passage ports, in which the passage ports of the same oil passage communicate with each other.
The present embodiment deals with a case where a swash plate variable mechanism is provided in a hydraulic pump or a hydraulic motor.
When the hydraulic pump or the hydraulic motor is used as the hydraulic pump, if the swash plate variable mechanism exists, the fourth oil inlet/outlet 9 is connected with an inlet oil way of a pressure control valve of the swash plate variable mechanism, at the moment, the third oil way channel 5 is not communicated with the first oil way channel 3, and the third oil way channel 5 is in an isolated state, and the second oil way channel 4 is connected with the third oil way channel 5. When the outlet pressure of the hydraulic pump does not reach the set variable pressure of the pressure control valve, the pressure control valve is closed, the angle of the swash plate is large under the action of the elastic force of the return spring, and the swash plate is in a large displacement state; when the pressure rises to the pressure of the pressure control valve set variable, the pressure control valve is opened, high-pressure oil enters the servo piston cavity of the swash plate variable mechanism, the swash plate overcomes the elastic force of the return spring under the action of the pressure of the servo piston cavity, the angle of the swash plate is reduced to zero, the swash plate is in a state of small displacement to zero displacement, and finally the constant pressure variable requirement of the hydraulic system is met.
When a hydraulic pump or a hydraulic motor is used as hydraulic motor oil, if a swash plate variable mechanism exists, the fourth oil inlet and outlet hole is connected with an inlet oil path of a pressure control valve of the swash plate variable mechanism, the third oil inlet and outlet hole 11 is connected with the swash plate variable mechanism, and a small-end piston cavity oil path is in a low-load state. When the motor is in a low load state, the inlet pressure of the motor does not reach the set variable pressure of the pressure control valve, so that the pressure control valve is closed, the angle of the swash plate is reduced under the action of the pressure of the small-end piston cavity, and the swash plate is in a small displacement state; when the pressure rises to the set pressure of the pressure control valve, the pressure control valve is opened, high-pressure oil enters the swash plate variable mechanism to break the piston cavity, and because the area difference exists between the large-end piston and the small-end piston at the moment, the angle of the swash plate is increased under the action of the pressure difference, the swash plate is in a large-displacement state, and the constant-pressure variable requirement of the hydraulic motor is finally met.
In one embodiment, referring to fig. 1, the first check valve 6 includes a first valve body 61, a first spring 62, a first valve spool 63, a first oil inlet 64, and a first oil outlet 65;
the first valve body 61 is provided with a first valve core cavity 611 with an opening facing the first oil inlet 64, and the first valve core cavity 611 is respectively communicated with the first oil outlet 65 and the first oil inlet 64;
the first spring 62 and the first spool 63 are disposed in the first spool chamber 611;
the first spring 62 is arranged between the first valve core 63 and the wall of the first valve core cavity 611, and the first valve core 63 is driven by the first spring 62 to be close to and seal the first oil inlet 64.
Wherein, the first valve core 63 may include a circular table portion, the diameter of the upper bottom surface of the circular table portion is smaller than the diameter of the first oil inlet 64, and the diameter of the lower bottom surface of the circular table portion is larger than the diameter of the first oil inlet 64. The outer surface of the circular table portion may be provided with a flexible rubber layer, and the first spool 63 includes a cylindrical portion combined with the lower bottom surface of the circular table portion, and the diameter of the cylindrical portion is the same as that of the lower bottom surface of the circular table portion.
The first spool chamber 611 may be a cylindrical structure having the same diameter as the cylinder portion, such that the first spool 63 may slide smoothly within the first spool chamber 611. Here, it can be known that, when the fluid oil pressure of the first oil outlet 65 pushes the first spool chamber 611, so that the first spring 62 is compressed, the first spool 63 is separated from the first oil inlet 64, so that the first oil inlet 64 is communicated with the first oil outlet 65.
Specifically, in the use process, when the thrust of the fluid in the second oil passage 4 to the first valve core 63 is greater than the thrust of the elastic force of the first spring 62 to the first valve core 63, the first valve is separated from the first oil inlet 64, so that the first oil inlet 64 is communicated with the first oil outlet 65; when the thrust of the fluid in the second oil passage 4 to the first valve core 63 is smaller than the thrust of the elastic force of the first spring 62 to the first valve core 63, the first valve is tightly attached to the first oil inlet 64, so that the first oil inlet 64 is communicated with the first oil outlet 65.
The high-pressure oil path switching device comprises a valve block 12, and the first check valve 6 can be fixedly arranged on the valve block 12. The valve block can be the body of the high-pressure oil path switching device, and is provided with a first oil path channel, a second oil path channel, a third oil path channel, a fourth oil path channel, a first check valve, a second check valve and the like.
In one embodiment, referring to fig. 1, the second check valve 7 includes a second valve body 71, a second spring 72, a second valve spool 73, a second oil outlet 74, and a second oil inlet 75;
a second valve core cavity 711 with an opening facing the second oil inlet 75 is arranged on the second valve body 71, and the second valve core cavity 711 is respectively communicated with the second oil outlet 74 and the second oil inlet 75;
the second spring 72 and the second spool 73 are disposed in the second spool chamber 711;
the second spring 72 is arranged between the second valve core 73 and the wall of the second valve core cavity 711, and the second valve core 73 is driven by the second spring 72 to be close to and seal the second oil inlet 75.
Wherein the structure of the second check valve 7 may be the same as that of the first check valve 6.
In one embodiment, the on-off valve 8 is an electromagnetic on-off valve 8, and the on-off of the battery on-off valve 8 is controlled by turning on or off the battery in order to facilitate the control of the on-off valve 8.
Specifically, referring to fig. 1, the on-off valve 8 may include a solenoid 81, a valve seat 82, a third spool 83, and a return spring 84;
the valve seat 82 is provided with a first hole 821 and a second hole 822;
the electromagnetic coil 81 surrounds the outer side of the third valve spool 83 and is used for controlling the third valve spool 83 to move to the first position;
a return spring 84 is connected to the third spool 83 for controlling the third spool 83 to return to the second position;
when the third spool 83 is in the first position, the third spool 83 brings the valve seat 82 into the first state, and when the third spool 83 is in the second position, the third spool 83 brings the valve seat 82 into the second state, the first state being a state in which the first hole 821 and the second hole 822 are in communication with each other or are not in communication with each other, the second state being a state in which the first hole 821 and the second hole 822 are in communication with each other or are not in communication with each other, the first state being different from the second state.
The electromagnetic coil 81 surrounds the outside of the third spool 83, so that the electromagnetic coil 81 can control the movement of the third spool 83 when being electrified, wherein the third spool 83 is made of metal material, such as copper and iron; taking the first state in which the first hole 821 and the second hole 822 are communicated with each other and the second state in which the first hole 821 and the second hole 822 are disconnected from each other as an example, when the solenoid 81 is energized, the solenoid 81 controls the third spool 83 to move to the first position, at which time the third spool 83 closes the on-off valve 8, and when the solenoid 81 is de-energized, the spring controls the third spool 83 to move to the second position, at which time the third spool 83 opens the on-off valve 8.
Specifically, a cavity 823 is arranged on the valve seat 82;
the third spool 83 is at least partially slidably disposed within the cavity 823;
an oil guide passage 831 is provided in the third spool 83, so that when the third spool 83 is in the first position, the oil guide passage 831 cooperates with the first hole 821 and the second hole 822 to form an oil passage, and when the third spool 83 is in the second position, the third spool 83 seals the first hole 821 or the second hole 822.
Wherein the cavity 823 may be elliptical, the third spool 83 may be elliptical, and the third valve body has an outer diameter that is the same as the diameter of the cavity 823 such that the third valve body may move along the cavity 823, see fig. 1, where the position of the third spool 83 is the second position, and the third spool 83 seals the second hole 822.
The oil guide channel can be formed by matching an annular groove annularly arranged on the outer wall of the third valve element with the cavity wall of the cavity 823.
In one embodiment, the valve seat 82, the first valve body 61, and the second valve body 71 are integrally mounted to the valve block 12 by a threaded connection.
In one embodiment, the present application discloses a hydraulic system comprising a hydraulic device including a hydraulic pump or a hydraulic motor, and a high-pressure oil path switching device as any one of the above, the high-pressure oil path switching device being connected to the hydraulic device. How the hydraulic device and the high-pressure oil path switching device can refer to the foregoing, and the description is not repeated here.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.

Claims (10)

1. A high-pressure oil way switching device is characterized by comprising a first oil inlet and outlet, a second oil inlet and outlet, a first oil way channel, a second oil way channel, a third oil way channel, a first check valve, a second check valve and an on-off valve;
a first channel port of the first oil channel is connected with the first oil inlet and outlet, a second channel port of the first oil channel is connected with the first one-way valve, and a third channel port of the first oil channel is connected with the on-off valve;
a first channel port of the second oil channel is connected with the second oil inlet and outlet, a second channel port of the second oil channel is connected with the first one-way valve, and a third channel port of the second oil channel is connected with the second one-way valve, wherein the first one-way valve is constructed in a way that the second oil channel is communicated with the first oil channel in a one-way mode;
and a first channel port of the third oil channel is connected with the second one-way valve, a second channel port of the third oil channel is connected with the on-off valve, the second one-way valve is constructed in a manner that the third oil channel is communicated with the second oil channel in a one-way mode, and the channel valve is used for controlling the on-off of the first oil channel and the third oil channel.
2. The high-pressure oil path switching device according to claim 1, further comprising a fourth oil inlet/outlet and a fourth oil path passage communicating with the second oil path passage;
and a first channel port of the fourth oil channel is connected with the fourth oil inlet and outlet, and a second channel port of the fourth oil channel is connected with the second one-way valve, so that the third oil channel is in one-way communication with the fourth oil channel.
3. The high-pressure oil passage switching device according to claim 2, further comprising a third oil inlet and outlet, wherein the third oil passage has a third passage port, and the third passage port of the third oil passage is connected to the third oil inlet and outlet.
4. The high-pressure oil path switching device according to claim 1, wherein the first check valve includes a first oil inlet, a first oil outlet, a first valve body, a first spring, and a first valve spool;
the first valve body is provided with a first valve core cavity with an opening facing a first oil inlet, and the first valve core cavity is communicated with the first oil outlet and the first oil inlet respectively;
the first valve core is arranged in the first valve core cavity;
the first spring is arranged between the first valve core and the cavity wall of the first valve core cavity and used for driving the first valve core to be attached tightly and sealing the first oil inlet.
5. The high-pressure oil way switching device according to claim 4, wherein the second check valve comprises a second oil inlet, a second oil outlet, a second valve body, a second spring and a second valve core;
a second valve core cavity with an opening facing a second oil inlet is formed in the second valve body and is communicated with the second oil outlet and the second oil inlet respectively;
the second valve core is arranged in a second valve core cavity;
the second spring is arranged between the second valve core and the cavity wall of the second valve core cavity and used for driving the second valve core to be attached to and seal the second oil inlet.
6. The high-pressure oil passage switching device according to claim 5, wherein the first spool chamber, the first spool, the second spool chamber, and the second spool are each oval, an outer diameter of the first spool is the same as a diameter of the first spool chamber, and an outer diameter of the second spool is the same as a diameter of the second spool chamber.
7. The high-pressure oil passage switching device according to claim 1, wherein the on-off valve includes a valve seat, a return spring, a third spool, and an electromagnetic coil;
the valve seat is provided with a first hole and a second hole;
the electromagnetic coil surrounds the outer side of the third valve core and is used for controlling the third valve core to move to the first position;
the return spring is connected with the third valve core and is used for controlling the third valve core to return to a second position;
when the third valve core is at a first position, the third valve core enables the valve seat to be in a first state, when the third valve core is at a second position, the third valve core enables the valve seat to be in a second state, the first state is that the first hole and the second hole are mutually communicated or disconnected, the second state is that the first hole and the second hole are mutually communicated or disconnected, and the first state is different from the second state.
8. The high-pressure oil path switching device according to claim 7, wherein a cavity is arranged on the valve seat;
the third valve element is at least partially arranged in the cavity in a sliding mode;
an oil guide channel is arranged in the third valve element, so that when the third valve element is located at the first position, the oil guide channel is matched with the first hole and the second hole to form an oil path channel, and when the third valve element is located at the second position, the valve element seals the first hole or the second hole.
9. The high-pressure oil passage switching device according to claim 8, wherein the cavity and the third spool are both cylindrical, and an outer diameter of the third spool is the same as a diameter of the cavity.
10. A hydraulic system comprising a hydraulic device and the high-pressure oil passage switching device according to any one of claims 1 to 9, wherein the hydraulic device includes a hydraulic pump or a hydraulic motor, and the high-pressure oil passage switching device is connected to the hydraulic device.
CN202110740140.2A 2021-06-30 2021-06-30 High-pressure oil way switching device and hydraulic system Active CN113446279B (en)

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CN114110404A (en) * 2021-12-01 2022-03-01 江苏中科朗润智能科技有限公司 Pushing type oil way distributor on-off control device
CN114110404B (en) * 2021-12-01 2023-02-28 江苏中科朗润智能科技有限公司 Pushing type oil way distributor on-off control device

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