CN113446279B - 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
CN113446279B
CN113446279B CN202110740140.2A CN202110740140A CN113446279B CN 113446279 B CN113446279 B CN 113446279B CN 202110740140 A CN202110740140 A CN 202110740140A CN 113446279 B CN113446279 B CN 113446279B
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China
Prior art keywords
oil
valve
way
valve core
channel
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CN202110740140.2A
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Chinese (zh)
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CN113446279A (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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Classifications

    • 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 one-way valve, a second one-way valve and an on-off valve; the first channel port of the first oil channel is connected with the first oil inlet and outlet, the second channel port is connected with the first one-way valve, and the third channel port is connected with the on-off valve; the first channel port of the second oil channel is connected with the second oil inlet and outlet, the second channel port is connected with the first one-way valve, and the third channel port is connected with the second one-way valve; the first channel opening of the third oil channel is connected with the second one-way valve, and the second channel opening is connected with the on-off valve. By implementing the technical scheme of the application, the switching operation is more convenient and faster when the hydraulic motor and the hydraulic pump are used in a reciprocal switching manner, and the control efficiency of switching the high-pressure oil way 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 higher demands on the reliability and safety of a hydraulic system. In actual use, the hydraulic motor and the hydraulic pump are needed to be used in a reciprocal way, namely, the hydraulic motor is used as the hydraulic pump in forward use, the high-pressure oil way is used as the output high-pressure oil in reverse use, and the high-pressure oil way is used as the hydraulic motor in input high-pressure oil in reverse use.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present disclosure provides a high-pressure oil path switching device and a hydraulic system.
According to the first aspect of the embodiment of the application, 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 one-way valve, a second one-way valve and an on-off valve;
The first channel port of the first oil channel is connected with the first oil inlet and outlet, the second channel port of the first oil channel is connected with the first one-way valve, and the third channel port of the first oil channel is connected with the on-off valve;
the first passage port of the second oil passage is connected with the second oil inlet and outlet, the second passage port of the second oil passage is connected with the first one-way valve, and the third passage port of the second oil passage is connected with the second one-way valve, wherein the first one-way valve is configured to be in one-way conduction with the second oil passage to the first oil passage;
The first channel port of the third oil channel is connected with the second one-way valve, the second channel port of the third oil channel is connected with the on-off valve, the second one-way valve is configured to conduct the third oil channel to the second oil channel in a one-way manner, 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 way switching device further comprises a fourth oil inlet and outlet and a fourth oil way channel communicated with the second oil way channel;
The first passage opening of the fourth oil passage is connected with the fourth oil inlet and outlet, and the second passage opening of the fourth oil passage is connected with the second one-way valve, so that the third oil passage is conducted unidirectionally to the fourth oil passage.
In a third aspect of the present application, the high-pressure oil path switching device further includes a third oil inlet/outlet port, the third oil path passage has a third port,
And a third pipeline port of the third oil pipeline is connected with the third oil inlet and outlet.
Optionally, the first one-way valve comprises 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 the first oil inlet, and the first valve core cavity is respectively communicated with the first oil outlet and the first oil inlet;
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 is used for driving the first valve core to be tightly attached to and seal the first oil inlet.
Optionally, the second one-way valve comprises a second oil inlet, a second oil outlet, a second valve body, a second spring and a second valve core;
The second valve body is provided with a second valve core cavity with an opening facing the second oil inlet, and the second valve core cavity is respectively communicated with the second oil outlet and the second oil inlet;
The second valve core is arranged in the 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 is used for driving the second valve core to be tightly attached to and seal the second oil inlet.
Optionally, the first spool cavity, the first spool, the second spool cavity and the second spool are all elliptical, the outer diameter of the first spool is the same as the diameter of the first spool cavity, and the outer diameter of the second spool is the same as the diameter of the second spool cavity.
Optionally, the on-off valve comprises a valve seat, a reset 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 a first position;
The return spring is connected with the third valve core and is used for controlling the third valve core to return to the second position;
When the third valve core is in a first position, the third valve core enables the valve seat to be in a first state, when the third valve core is in 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 mutually disconnected, the second state is that the first hole and the second hole are mutually communicated or mutually disconnected, and the first state and the second state are different.
Optionally, a cavity is arranged on the valve seat;
The third valve core is at least partially arranged in the cavity in a sliding way;
An oil guide channel is arranged in the third valve core, so that when the third valve core is positioned at a 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 core is positioned at a second position, the valve core seals the first hole or the second hole.
Optionally, the cavity and the third valve core are both cylindrical, and the outer diameter of the third valve core 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 line 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 line switching device is connected to the hydraulic device.
The following beneficial technical effects can be achieved by implementing the technical scheme of the application: by adopting the high-pressure oil way switching device, the oil way channel during the switching of the hydraulic motor and the hydraulic pump can be controlled by the on-off valve, so that the switching operation during the switching of the hydraulic motor and the hydraulic pump is more convenient, and the control efficiency of the switching of the high-pressure oil way is improved.
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 diagram of a high-pressure oil circuit switching device according to an embodiment of the present application;
Fig. 2 is a schematic diagram of oil path control of a high-pressure oil path switching device according to an embodiment of the present application.
Detailed Description
The present disclosure is described in further detail below with reference to the drawings and the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant content and not limiting of the present disclosure. It should be further noted that, for convenience of description, only a portion relevant to the present disclosure is shown in the drawings.
In addition, embodiments of the present disclosure and features of the embodiments 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 comprises a first oil inlet and outlet port 1, a second oil inlet and outlet port 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;
The first channel port of the first oil channel 3 is connected with the first oil inlet and outlet port 1, the second channel port of the first oil channel 3 is connected with the first one-way valve 6, and the third channel port of the first oil channel 3 is connected with the on-off valve 8;
The first passage opening of the second oil passage 4 is connected with the second oil inlet and outlet 2, the second passage opening of the second oil passage 4 is connected with the first one-way valve 6, the third passage opening of the second oil passage 4 is connected with the second one-way valve 7, wherein the first one-way valve 6 is configured that the second oil passage 4 is conducted unidirectionally to the first oil passage 3;
the first channel opening of the third oil channel 5 is connected with the second one-way valve 7, the second channel opening of the third oil channel 5 is connected with the on-off valve 8, wherein the second one-way valve 7 is configured to enable the third oil channel 5 to conduct unidirectionally to the second oil channel 4, 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 having at least three passage openings, the second oil passage is an oil passage having at least three passage openings, and the second oil passage is an oil passage having at least two passage openings, wherein the passage openings 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 and outlet port 1 is connected with a high-pressure oil way of a system, and the second oil inlet and outlet port 2 is connected with the high-pressure oil way of the hydraulic pump or the hydraulic motor.
When the hydraulic pump or the hydraulic motor is to be used as the hydraulic pump, only the on-off valve 8 is required to be controlled to be disconnected, so that the first oil path 3 is not communicated with the third oil path 5, and meanwhile, the second check valve 7 is configured to enable the third oil path 5 to be conducted unidirectionally to the second oil path 4, and high-pressure oil does not exist in the third oil path 5, so that the second oil path 4 is not communicated with the third oil path 5; thus, the high-pressure oil output by the hydraulic pump applies an acting force to 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 the high-pressure oil path of the hydraulic pump flows to the high-pressure oil path of the system;
When the hydraulic pump or the hydraulic motor is to be used as the hydraulic motor, only the on-off valve 8 is controlled to be opened so as to enable the first oil path 3 to be communicated with the third oil path 5, meanwhile, the second one-way valve 7 is constructed so that the third oil path 5 is in one-way conduction with the second oil path 4, and at the moment, high-pressure oil exists in the third oil path 5, and the high-pressure oil can enable the second one-way valve 7 to be opened, so that the second oil path 4 is also communicated with the third oil path 5 at the moment; the first check valve 6 is configured to be in one-way conduction with the second oil path 4 to the first oil path 3, so that high-pressure oil in the high-pressure oil path of the system is blocked by the first check valve 6, and the high-pressure oil in the high-pressure oil path of the system sequentially passes through the third high-pressure oil path and the second high-pressure oil path from the first high-pressure oil path and then enters the hydraulic motor.
As can be seen from the above, when the high-pressure oil path switching device of the present embodiment is implemented, the on-off valve 8 in the high-pressure oil path switching device is only required to be controlled to switch between the hydraulic motor and the hydraulic pump in a reciprocal manner, so as to realize corresponding oil path switching control and isolate the oil path.
As is clear from the above, the first check valve 6 is for discharging oil with respect to the hydraulic pump, so the first check valve 6 may be referred to as an oil discharge check valve, the second check valve 7 is for feeding oil with respect to the hydraulic motor, and the second check valve 7 may be referred to as an oil feed check valve.
In one embodiment, referring to fig. 1 and 2, the high-pressure oil path switching device further includes a fourth oil inlet and outlet port 9 and a fourth oil path passage 10 communicating with the second oil path passage 4;
The first port of the fourth oil passage 10 is connected with the fourth oil inlet and outlet port 9, and the second port of the fourth oil passage 10 is connected with the second check valve 7, so that the third oil passage 5 is conducted unidirectionally to the fourth oil passage 10.
It is known that the fourth oil passage in the present embodiment is an oil passage having at least two passage openings, wherein the passage openings 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 port 11, the third oil way channel 5 is provided with a third channel port, and the third channel port of the third oil way channel 5 is connected with the third oil inlet and outlet port 11.
It is known that the second oil passage in the present embodiment is an oil passage having at least three passage openings, wherein the passage openings of the same oil passage are communicated with each other.
The present embodiment is directed to a case where a swash plate variable mechanism is present 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 and outlet port 9 is connected with the inlet oil way of the pressure control valve of the swash plate variable mechanism, and at the moment, the third oil way channel 5 is not communicated with the second oil way channel 4, and the third oil way channel 5 is in an isolated state with the first oil way channel 3. 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, and the angle of the swash plate is large under the elastic force of the return spring and is in a large displacement state; when the pressure rises to the variable pressure set by the pressure control valve, the pressure control valve is opened, high-pressure oil enters a follow-up piston cavity of the swash plate variable mechanism, the swash plate overcomes the elastic force of a return spring under the action of the pressure of the follow-up piston cavity, the angle of the swash plate is reduced until the angle is zero, the swash plate is in a state from small displacement to zero displacement, and finally the constant-pressure variable requirement of a hydraulic system is met.
When the hydraulic pump or the 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 way of a pressure control valve of the swash plate variable mechanism, the third oil inlet and outlet hole 11 is connected with a small-end piston cavity oil way of the swash plate variable mechanism in a low-load state. When the motor is in low load, 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 interrupt the piston cavity, and as the large-end piston and the small-end piston have area differences, the angle of the swash plate is increased under the action of the pressure difference, and the swash plate is in a large-displacement state, so that 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 spool 63, a first oil inlet port 64, and a first oil outlet port 65;
the first valve body 61 is provided with a first valve core cavity 611 which is opened towards 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 within the first spool chamber 611;
The first spring 62 is disposed between the first spool 63 and the cavity wall of the first spool cavity 611, and the first spool 63 is driven by the first spring 62 to abut against and seal the first oil inlet port 64.
The first valve core 63 may include a truncated cone, where the diameter of the upper bottom surface of the truncated cone is smaller than the diameter of the first oil inlet 64, and the diameter of the lower bottom surface of the truncated cone is larger than the diameter of the first oil inlet 64. The outer surface of the circular truncated cone portion may be provided with a flexible rubber layer, the first valve core 63 includes a cylindrical portion, the cylindrical portion is combined with the lower bottom surface of the circular truncated cone portion, and the diameter of the cylindrical portion is the same as the diameter of the lower bottom surface of the circular truncated cone portion.
The first spool chamber 611 may have a cylindrical structure having the same diameter as the cylindrical portion described above, so that the first spool 63 can smoothly slide in the first spool chamber 611. It is 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, and thus 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 path channel 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 path channel 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 a body of the high-pressure oil way switching device, and is provided with a corresponding first oil way channel, a second oil way channel, a third oil way channel, a fourth oil way channel, a first one-way valve, a second one-way 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 port 74, and a second oil inlet port 75;
the second valve body 71 is provided with a second valve core cavity 711 with an opening facing the second oil inlet 75, 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 within the second spool chamber 711;
the second spring 72 is disposed between the second spool 73 and the chamber wall of the second spool chamber 711, and the second spool 73 is driven by the second spring 72 to abut against 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, to facilitate the on-off valve 8 being controlled, the on-off valve 8 is an electromagnetic on-off valve 8, which is controlled by turning on and off the battery 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 core 83 and is used for controlling the third valve core 83 to move to the first position;
a return spring 84 is connected to the third valve element 83 for controlling the third valve element 83 to return to the second position;
When the third valve element 83 is in the first position, the third valve element 83 brings the valve seat 82 into a first state, and when the third valve element 83 is in the second position, the third valve element 83 brings the valve seat 82 into a second state, wherein the first state is that the first hole 821 and the second hole 822 are mutually communicated or mutually disconnected, and the second state is that the first hole 821 and the second hole 822 are mutually communicated or mutually disconnected, and the first state and the second state are different.
The electromagnetic coil 81 surrounds the outer side of the third valve core 83, so that the electromagnetic coil 81 can control the third valve core 83 to move after being electrified, wherein the third valve core 83 is made of metal materials, such as copper and iron; taking the first state as the first hole 821 and the second hole 822 are mutually communicated, and the second state as the first hole 821 and the second hole 822 are mutually disconnected as an example, when the electromagnetic coil 81 is electrified, the electromagnetic coil 81 controls the third valve core 83 to move to the first position, at the moment, the third valve core 83 closes the on-off valve 8, and when the electromagnetic coil 81 is in the outage, the spring controls the third valve core 83 to move to the second position, at the moment, the third valve core 83 opens the on-off valve 8.
Specifically, the valve seat 82 is provided with a cavity 823;
The third spool 83 is at least partially slidably disposed within the cavity 823;
An oil guide passage 831 is provided in the third valve element 83, so that when the third valve element 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 valve element 83 is in the second position, the third valve element 83 seals the first hole 821 or the second hole 822.
Wherein the cavity 823 may be oval, the third valve core 83 may be oval, and the outer diameter of the third valve body is the same as the diameter of the cavity 823, so that the third valve body may move along the cavity 823, and referring to fig. 1, the position of the third valve core 83 in fig. 1 is the second position, and the third valve core 83 seals the second hole 822.
The oil guide channel may be formed by matching an annular groove formed on the outer wall of the third valve core in a surrounding manner 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 application discloses a hydraulic system comprising a hydraulic device and any of the above high pressure oil circuit switching devices, the hydraulic device comprising a hydraulic pump or a hydraulic motor, the high pressure oil circuit switching device being connected to the hydraulic device. How the hydraulic device and the high-pressure oil circuit switching device can be referred to the foregoing, the description will not be repeated here.
In the description of the present specification, reference to the terms "one embodiment/manner," "some embodiments/manner," "example," "a particular example," "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/manner or example is included in at least one embodiment/manner or example of the application. In this specification, the schematic representations of the above terms are not necessarily for the same embodiment/manner 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/modes or examples described in this specification and the features of the various embodiments/modes or examples can be combined and combined by persons skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
It will be appreciated by those skilled in the art that the above-described 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 will be apparent to persons skilled in the art from the foregoing disclosure, and such variations or modifications are intended to be within the scope of the present disclosure.

Claims (7)

1. The 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 one-way valve, a second one-way valve and an on-off valve;
The first channel port of the first oil channel is connected with the first oil inlet and outlet, the second channel port of the first oil channel is connected with the first one-way valve, and the third channel port of the first oil channel is connected with the on-off valve;
the first passage port of the second oil passage is connected with the second oil inlet and outlet, the second passage port of the second oil passage is connected with the first one-way valve, and the third passage port of the second oil passage is connected with the second one-way valve, wherein the first one-way valve is configured to be in one-way conduction with the second oil passage to the first oil passage;
The first passage opening of the third oil passage is connected with the second one-way valve, the second passage opening of the third oil passage is connected with the on-off valve, the second one-way valve is configured to conduct the third oil passage to the second oil passage in a one-way manner, and the on-off valve is used for controlling the on-off of the first oil passage and the third oil passage; the high-pressure oil way switching device further comprises a fourth oil inlet and outlet and a fourth oil way channel communicated with the second oil way channel;
The first passage opening of the fourth oil passage is connected with the fourth oil inlet and outlet, and the second passage opening of the fourth oil passage is connected with the second one-way valve, so that the third oil passage is conducted unidirectionally to the fourth oil passage;
the high-pressure oil way switching device further comprises a third oil inlet and outlet, the third oil way channel is provided with a third pipeline port, and the third pipeline port of the third oil way channel is connected with the third oil inlet and outlet;
The on-off valve comprises a valve seat, a reset 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 a first position;
The return spring is connected with the third valve core and is used for controlling the third valve core to return to the second position;
When the third valve core is in a first position, the third valve core enables the valve seat to be in a first state, when the third valve core is in 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 mutually disconnected, the second state is that the first hole and the second hole are mutually communicated or mutually disconnected, and the first state and the second state are different.
2. The high pressure oil circuit switching device of claim 1, wherein the first check valve comprises 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 the first oil inlet, and the first valve core cavity is respectively communicated with the first oil outlet and the first oil inlet;
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 is used for driving the first valve core to be tightly attached to and seal the first oil inlet.
3. The high pressure oil circuit switching device according to claim 2, wherein the second check valve includes a second oil inlet, a second oil outlet, a second valve body, a second spring, and a second valve spool;
The second valve body is provided with a second valve core cavity with an opening facing the second oil inlet, and the second valve core cavity is respectively communicated with the second oil outlet and the second oil inlet;
The second valve core is arranged in the 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 is used for driving the second valve core to be tightly attached to and seal the second oil inlet.
4. The high-pressure oil circuit switching device according to claim 3, wherein the first spool chamber, the first spool, the second spool chamber, and the second spool are each elliptical, 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.
5. The high-pressure oil path switching device according to claim 4, wherein a cavity is provided on the valve seat;
The third valve core is at least partially arranged in the cavity in a sliding way;
An oil guide channel is arranged in the third valve core, so that when the third valve core is positioned at a 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 core is positioned at a second position, the valve core seals the first hole or the second hole.
6. The high pressure oil circuit switching device of claim 5, wherein the cavity and the third spool are both cylindrical, and the third spool has an outer diameter that is the same as the cavity diameter.
7. A hydraulic system, comprising a hydraulic device and the high-pressure oil path switching device according to any one of claims 1 to 6, wherein the hydraulic device comprises a hydraulic pump or a hydraulic motor, and the high-pressure oil path switching device is connected with 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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