CN112576781A - Proportional valve with pressure reducing and reversing functions - Google Patents
Proportional valve with pressure reducing and reversing functions Download PDFInfo
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- CN112576781A CN112576781A CN202011537933.6A CN202011537933A CN112576781A CN 112576781 A CN112576781 A CN 112576781A CN 202011537933 A CN202011537933 A CN 202011537933A CN 112576781 A CN112576781 A CN 112576781A
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- main valve
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- 230000001603 reducing effect Effects 0.000 title claims description 21
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 79
- 230000009467 reduction Effects 0.000 claims abstract description 20
- 239000003921 oil Substances 0.000 claims description 138
- 239000010687 lubricating oil Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 8
- 239000010720 hydraulic oil Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- 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
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
- F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- 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
- F16K27/048—Electromagnetically actuated valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- 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
- F16K31/0603—Multiple-way valves
- F16K31/061—Sliding valves
- F16K31/0613—Sliding valves with cylindrical slides
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention provides a proportional valve with pressure reduction and reversing functions, belonging to the technical field of hydraulic valves; the invention comprises the following steps: the valve comprises a valve body, a main valve core and two electromagnetic drivers; the main valve core is slidably arranged in the valve body, and the two electromagnetic drivers are respectively arranged at two ends of the main valve core; the main valve core slides leftwards or rightwards, so that the high-pressure oil cavity is communicated with the working oil cavity on the corresponding side, and high-pressure oil enters the working oil cavity; the two ends of the main valve core are respectively provided with a pressure stabilizing cavity, and a pressure stabilizing valve core which slides relative to the main valve core is sleeved in the pressure stabilizing cavity; after the high-pressure oil enters the working oil cavity, the high-pressure oil enters the pressure stabilizing cavity through the pressure stabilizing hole so as to drive the pressure stabilizing valve core to slide relative to the main valve core along the axial direction and be far away from the main valve core, so that the opening degree of the main valve core is adjusted. The proportional valve can realize reversing, can reduce pressure in an equal proportion and automatically control the oil pressure in a reversing oil way.
Description
Technical Field
The invention relates to a hydraulic valve technology, in particular to a proportional valve with pressure reduction and reversing functions, and belongs to the technical field of proportional reversing valves.
Background
The proportional pressure reducing valve reduces the working pressure to a certain required outlet pressure through the adjusting action of the electromagnetic driver so as to meet the pressure requirement of a certain branch; the existing proportional pressure reducing valve only reduces the pressure of a single working oil port, if two working oil ports are required to be reduced, a reversing valve is additionally arranged to switch an oil way or be provided with the two proportional pressure reducing valves, obviously, the cost can be greatly increased, and the loop is complex, large in size and high in failure rate.
Therefore, a proportional valve having an automatic pressure reducing effect and capable of meeting a reversing requirement is needed in the prior art to solve the technical problem that a person skilled in the art needs to solve urgently.
Disclosure of Invention
The invention provides a novel proportional valve with pressure reduction and reversing functions, which realizes double functions of pressure regulation and reversing by arranging a pressure stabilizing valve core capable of automatically floating according to oil pressure at the end part of a main valve core, and solves the technical problem of complex structure when realizing the functions of pressure stabilization and reversing of the proportional valve in the prior art.
The invention provides a proportional valve with pressure reduction and reversing functions, which is used for realizing reversing and pressure stabilization while reducing pressure; the invention comprises a valve body, a main valve core and two electromagnetic drivers; the main valve core is slidably arranged in the valve body, and the two electromagnetic drivers are respectively arranged at two ends of the main valve core; a high-pressure oil cavity and two working oil cavities are arranged in the valve body, and the two working oil cavities are respectively positioned on two sides of the high-pressure oil cavity; high-pressure oil is arranged in the high-pressure oil cavity;
the main valve core slides leftwards or rightwards, so that the high-pressure oil cavity is communicated with the working oil cavity on the corresponding side, and high-pressure oil enters the working oil cavity;
the two ends of the main valve core are respectively provided with a pressure stabilizing cavity, and a pressure stabilizing valve core which slides relative to the main valve core is sleeved in the pressure stabilizing cavity;
the side wall of the main valve core is provided with a pressure stabilizing hole, and the pressure stabilizing hole is connected with the pressure stabilizing cavity;
after the high-pressure oil enters the working oil cavity, the high-pressure oil enters the pressure stabilizing cavity through the pressure stabilizing hole so as to drive the pressure stabilizing valve core to slide relative to the main valve core along the axial direction and be far away from the main valve core, so that the opening degree of the main valve core is adjusted.
The proportional valve with pressure reduction and reversing functions comprises a main valve core, a working oil chamber and a pressure reducing valve, wherein the side wall of the main valve core is provided with the oil outlet groove for communicating one working oil chamber after the main valve core slides;
the oil outlet groove is of a U-shaped structure in the length direction, and the bottom of the U-shaped structure faces the working oil cavity.
In the proportional valve with pressure reducing and reversing functions, springs are respectively arranged at two ends of the main valve element, and the main valve element is installed in the valve body through the springs.
In the proportional valve with pressure reducing and reversing functions, the electromagnetic actuator has an actuating rod, and the actuating rod is in contact with the main valve core through the pressure stabilizing valve core.
The proportional valve with pressure reduction and reversing functions comprises a pressure stabilizing cavity, a pressure stabilizing valve core and a pressure regulating valve, wherein the pressure stabilizing cavity is a cylindrical cavity with an opening at one end, and the pressure stabilizing valve core is arranged in the pressure stabilizing cavity through the opening; the opening is towards the end of the main spool;
and the high-pressure oil enters the pressure stabilizing cavity so that the pressure stabilizing valve core moves towards the opening direction.
The proportional valve with pressure reduction and reversing functions comprises a pressure stabilizing valve core, a pressure stabilizing valve body, a pressure regulating valve body and a pressure regulating valve body, wherein the pressure stabilizing valve core is provided with a radial surface and a radial surface;
and the pressure stabilizing valve core is also provided with a blind hole which is used for communicating the lubricating oil hole with the pressure stabilizing cavity.
The proportional valve with pressure reduction and reversing functions is characterized in that the part of the main valve core, which is used for sealing the high-pressure oil cavity, is an oil inlet section, and the section of the oil inlet section is in the shape of an inwards concave arc and corresponds to the high-pressure oil cavity.
The proportional valve with pressure reduction and reversing functions is characterized in that two oil return cavities are further arranged in the valve body; the two oil return cavities correspond to two ends of the main valve core respectively.
The proportional valve with pressure reduction and reversing functions comprises a main valve core, wherein the main valve core is provided with a plurality of oil discharge grooves at the end part, and the oil discharge grooves correspond to the oil return cavity.
The valve body structure of the invention can automatically adjust the oil pressure of the reversing oil way according to the pressure during the working process of the reversing valve, has strong automatic adjusting capability, can improve the reliability and the service life of a system, and improves the quality of a final product.
Drawings
FIG. 1 is a schematic cross-sectional view of a closed state of a proportional valve with pressure reduction and direction change functions according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a proportional valve with pressure reducing and direction changing functions according to an embodiment of the present invention, in an open state at one side;
FIG. 3 is a schematic structural diagram of a main spool of a proportional valve with pressure reducing and reversing functions according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of a pressure stabilizing valve core of a proportional valve with pressure reducing and reversing functions according to an embodiment of the present invention.
Detailed Description
The valve body structure of the reversing valve can be made of the following materials, and is not limited to the following materials, for example: common components such as a valve core, a hydraulic matching system, an electric control device and the like.
FIG. 1 is a schematic cross-sectional view of a closed state of a proportional valve with pressure reduction and direction change functions according to an embodiment of the present invention; and refer to fig. 2 and 3.
The proportional valve with pressure reduction and reversing functions of the embodiment comprises: valve body 1, main valve element 2 and two electromagnetic drivers 9; the main valve element 2 is slidably mounted in the valve body 1, and the two electromagnetic drivers are respectively mounted at two ends of the main valve element 2; a high-pressure oil cavity 3 and two working oil cavities 4 are arranged in the valve body 1, and the two working oil cavities 4 are respectively positioned on two sides of the high-pressure oil cavity 3; high-pressure oil is arranged in the high-pressure oil cavity 3; the high-pressure oil chamber 3 is connected with a hydraulic oil pump in the hydraulic system and used for releasing high-pressure hydraulic oil through a high-pressure oil port P.
Two working oil chambers 4 are respectively connected with two ends of the executing element so as to execute actions through an oil outlet A or an oil outlet B.
In general, two oil return cavities 5 are also arranged in the valve body 1; the two oil return cavities 5 correspond to two ends of the main valve core respectively.
The return chamber 5 is adapted to be connected to a return port T for draining low pressure oil to the tank on the non-active side of the actuator.
The main valve core 1 slides leftwards or rightwards, so that the high-pressure oil chamber 3 is communicated with the working oil chamber 4 on the corresponding side, and high-pressure oil enters the working oil chamber 4; as shown in fig. 2, main spool 1 slides to the right to communicate high-pressure chamber 3 with right-side working-oil chamber 4.
A pressure stabilizing hole 21 is formed in the side wall of the main valve element 2, and the pressure stabilizing hole 21 is connected with the pressure stabilizing cavity 20 and used for guiding hydraulic oil outside into the pressure stabilizing cavity 20;
after the high-pressure oil enters the working oil cavity 4, the high-pressure oil enters the pressure stabilizing cavity 20 through the pressure stabilizing hole 21 so as to drive the pressure stabilizing valve core 6 to axially slide relative to the main valve core 2 and to be far away from the main valve core 2, so that the opening degree of the main valve core 2 is adjusted.
In this embodiment, an oil outlet groove 24 for communicating one of the working oil chambers 4 after the main valve element 2 slides is formed in the side wall of the main valve element 2;
the oil outlet groove 24 is U-shaped in the longitudinal direction, and the bottom of the U-shaped structure faces the working oil chamber 4.
Because the bottom of the U-shaped structure is firstly opened in the working process of the oil outlet groove 24, when the opening degree is small, the initial pressure is small, and the oil outlet pressure in a weak opening state can be effectively adjusted.
According to the proportional valve with the pressure reducing and reversing functions, the two ends of the main valve element 2 are respectively provided with the spring 8, and the main valve element 2 is installed in the valve body through the spring 8.
The spring 8 can ensure that the main valve core is positioned in the middle of the valve body 1 under the effect of no external force, thereby keeping the closed state of the valve core.
In the proportional valve with pressure reducing and reversing functions according to the present embodiment, it is preferable that the electromagnetic actuator includes a drive rod 9, and the drive rod 9 is in contact with the main valve element 2 through the pressure stabilizing valve element 6.
In the proportional valve with pressure reduction and reversing functions of the embodiment, specifically, the pressure stabilizing cavity 20 is a cylindrical cavity with an opening at one end, and the pressure stabilizing valve core 6 is installed in the pressure stabilizing cavity 20 through the opening; the opening is towards the end of main spool 2; it is apparent that the regulator valve spool 6 is automatically slidable in accordance with the pressure of the hydraulic oil in the regulator chamber 20.
The high-pressure oil enters the pressure stabilizing cavity 20, so that the pressure stabilizing valve core 6 moves towards the opening direction.
The proportional valve structure with pressure reduction and reversing functions can guarantee stable and reliable output pressure, can realize reversing and pressure reduction control on the two working oil ports A and B, and is simple in structure and economical.
In the proportional valve with pressure reduction and reversing functions of the embodiment, an annular oil groove 63 is formed in the radial surface of the pressure stabilizing valve core 6, and a lubricating oil hole 62 is formed in the bottom of the annular oil groove 63;
the pressure stabilizing valve core 6 is also provided with a blind hole 61, and the blind hole 61 is used for communicating the lubricating oil hole 62 with the pressure stabilizing cavity 20.
In this embodiment, a portion of the main valve element 2 for sealing the high-pressure oil chamber 3 is an oil inlet section, and a cross section of the oil inlet section is in an inward concave arc shape so as to correspond to the high-pressure oil chamber 3.
As shown in fig. 3, the end of main valve element 2 is provided with a plurality of oil drain grooves 25, and oil drain grooves 25 correspond to oil return chamber 5. Main valve element 2 is also provided with an oil return channel 26 for discharging hydraulic oil during the discharge of oil.
As shown in fig. 1 and 2, the working process of the present embodiment is as follows.
An electromagnetic force generated by an electromagnetic driver (generally a proportional electromagnet) pushes a pressure stabilizing valve core 6 through a driving rod 9, the pressure stabilizing valve core 6 pushes a main valve core 2 and overcomes the spring force of a spring 8 to move to the right, so that an oil outlet groove 24 is communicated with a right working oil cavity 4, and a high pressure oil port P is communicated with an oil outlet B to drive a load to do work.
Meanwhile, pressure oil in the right working oil cavity 4 enters the pressure stabilizing hole 21 of the main valve core 2, firstly, the pressure stabilizing valve core 6 is pushed to move rightwards, and the driving rod 9 of the electromagnetic driver limits the movement stroke of the pressure stabilizing valve core 6; secondly, the pressure oil of the pressure stabilizing cavity 20 acts on the bottom surface of the pressure stabilizing valve core to push the main valve core 2 to counterbalance the electromagnetic force of the electromagnetic driver, when the hydraulic pressure of the right working oil cavity 4 is larger than the electromagnetic force of the electromagnetic driver, the main valve core 2 moves to the left, the oil groove 24 is cut off, and the pressure oil of the right working oil cavity 4 is decompressed.
When the hydraulic pressure of the right working oil chamber 4 is smaller than the electromagnetic force of the electromagnetic driver, the main valve element 2 moves to the right, so that the oil groove 24 is communicated with the right working oil chamber 4 again, and the pressure oil of the right working oil chamber 4 is supplemented; in such a reciprocating manner, the pressure oil in the right working oil chamber 4 is decompressed to a fixed value, and the magnitude of the pressure oil depends on the control current of the electromagnetic driver; it can be seen that main valve element 2 keeps the pressure in right working-oil chamber 4 stable with constant movement.
As can be seen from fig. 3 and 4, the pressure oil in the working oil chamber flows to the annular oil groove 63 through the blind hole 61 and the lubricating oil hole 62 of the pressure stabilizing valve core 6, so that the pressure stabilizing valve core 6 is supported by the annular pressure oil when sliding in the pressure stabilizing chamber, thereby ensuring the smoothness of the reciprocating motion of the main valve core 2; the problem that the pressure stability of the right working oil cavity 4 is influenced due to the fact that the movement of the main valve element 2 is blocked because a pressure stabilizing cavity of the main valve element 2 is not smoothly matched with the pressure stabilizing valve element 6 is avoided; meanwhile, the oil inlet section of the main valve core 2 is arranged in an inwards concave arc shape, so that the flow rate can be increased, the flow field of hydraulic oil from the port P to the right working oil cavity 4 can be improved, and the pressure stability of the right working oil cavity 4 is facilitated.
The oil discharge groove can smoothly discharge hydraulic oil and air in the electromagnetic driver, so that the smooth actuation of the electromagnetic driver is ensured, and the pressure stabilization of the right working oil cavity 4 is facilitated.
Similarly, when the electromagnetic driver on the other side has control current input, the pressure of the port A (the left working oil chamber 4) can be kept stable through the actuation process.
Meanwhile, the valve body structure of the invention enables the reversing valve to automatically adjust the oil pressure of the reversing oil way according to the pressure during the working process, has strong automatic adjustment capability, can improve the reliability and the service life of the system, and improves the quality of the final product.
In addition, the valve body structure of the invention has low manufacturing cost, compact structural design, ingenious structure, stable start and stop, convenient use and maintenance and is suitable for reversing, decompressing and oil pressure adjusting actions of various hydraulic systems.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments. Through the above description of the embodiments, those skilled in the art will clearly understand that the above embodiment method can be implemented by some modifications plus the necessary general technical overlap; of course, the method can also be realized by simplifying some important technical features in the upper level. Based on such understanding, the technical solution of the present invention essentially or contributing to the prior art is: the specific structure of the valve is matched with the method of the various embodiments of the invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A proportional valve with pressure reduction and reversing functions is characterized by comprising: the valve comprises a valve body, a main valve core and two electromagnetic drivers; the main valve core is slidably arranged in the valve body, and the two electromagnetic drivers are respectively arranged at two ends of the main valve core; a high-pressure oil cavity and two working oil cavities are arranged in the valve body, and the two working oil cavities are respectively positioned on two sides of the high-pressure oil cavity; high-pressure oil is arranged in the high-pressure oil cavity;
the main valve core slides leftwards or rightwards, so that the high-pressure oil cavity is communicated with the working oil cavity on the corresponding side, and high-pressure oil enters the working oil cavity;
the two ends of the main valve core are respectively provided with a pressure stabilizing cavity, and a pressure stabilizing valve core which slides relative to the main valve core is sleeved in the pressure stabilizing cavity;
the side wall of the main valve core is provided with a pressure stabilizing hole, and the pressure stabilizing hole is connected with the pressure stabilizing cavity;
after the high-pressure oil enters the working oil cavity, the high-pressure oil enters the pressure stabilizing cavity through the pressure stabilizing hole so as to drive the pressure stabilizing valve core to slide relative to the main valve core along the axial direction and be far away from the main valve core, so that the opening degree of the main valve core is adjusted.
2. The proportional valve with pressure reducing and reversing functions as claimed in claim 1, wherein an oil outlet groove for communicating one of the working oil chambers after the main valve core slides is formed in a side wall of the main valve core;
the oil outlet groove is of a U-shaped structure in the length direction, and the bottom of the U-shaped structure faces the working oil cavity.
3. The proportional valve with pressure reducing and reversing functions according to claim 1, wherein a spring is provided at each end of the main valve body, and the main valve body is mounted in the valve body through the spring.
4. The proportional valve with pressure reducing and reversing functions according to claim 3, wherein the electromagnetic actuator has an actuating rod that contacts the main spool via the pressure stabilizing spool.
5. The proportional valve with pressure reducing and reversing functions according to claim 1, wherein the pressure stabilizing cavity is a cylindrical cavity with an opening at one end, and the pressure stabilizing valve core is installed in the pressure stabilizing cavity through the opening; the opening is towards the end of the main spool;
and the high-pressure oil enters the pressure stabilizing cavity so that the pressure stabilizing valve core moves towards the opening direction.
6. The proportional valve with pressure reduction and reversing functions as claimed in claim 5, wherein an annular oil groove is formed in a radial surface of the pressure stabilizing valve core, and a lubricating oil hole is formed in the bottom of the annular oil groove;
and the pressure stabilizing valve core is also provided with a blind hole which is used for communicating the lubricating oil hole with the pressure stabilizing cavity.
7. The proportional valve with pressure reducing and reversing functions as claimed in claim 1, wherein the portion of the main valve core for sealing the high-pressure oil chamber is an oil inlet section, and the cross section of the oil inlet section is in the shape of an inward concave arc so as to correspond to the high-pressure oil chamber.
8. The proportional valve with pressure reduction and reversing functions according to claim 1, wherein two oil return cavities are further arranged in the valve body; the two oil return cavities correspond to two ends of the main valve core respectively.
9. The proportional valve with pressure reducing and reversing functions as claimed in claim 8, wherein the end of the main valve core is provided with a plurality of oil drainage grooves, and the oil drainage grooves correspond to the oil return cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011537933.6A CN112576781B (en) | 2020-12-23 | 2020-12-23 | Proportional valve with decompression and reversing functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011537933.6A CN112576781B (en) | 2020-12-23 | 2020-12-23 | Proportional valve with decompression and reversing functions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112576781A true CN112576781A (en) | 2021-03-30 |
| CN112576781B CN112576781B (en) | 2024-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011537933.6A Active CN112576781B (en) | 2020-12-23 | 2020-12-23 | Proportional valve with decompression and reversing functions |
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| CN (1) | CN112576781B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446280A (en) * | 2021-06-30 | 2021-09-28 | 北京航空航天大学宁波创新研究院 | Bidirectional differential pressure controller and hydraulic equipment |
| CN113932040A (en) * | 2021-10-16 | 2022-01-14 | 涌镇液压机械（上海）有限公司 | Proportional valve for controlling opening and closing of injection molding machine |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1416247A (en) * | 1972-12-13 | 1975-12-03 | Daimler Benz Ag | Accumulator control valve assemblies |
| EP0987444A2 (en) * | 1998-09-18 | 2000-03-22 | HydraForce, Inc. | Proportional priority flow regulator with reverse flow control |
| CN202348809U (en) * | 2011-12-13 | 2012-07-25 | 常德中联重科液压有限公司 | Pressure reducing valve |
| CN202510814U (en) * | 2012-01-12 | 2012-10-31 | 上海昀锋液压有限公司 | Stacked proportional electromagnetic flow valve |
| DE102015215267A1 (en) * | 2014-08-12 | 2016-02-18 | Xuzhou Construction Machinery Group Co., Ltd. | Function connection valve body structure and proportional multiway valve |
| US20170364102A1 (en) * | 2016-06-16 | 2017-12-21 | Parker-Hannifin Corporation | Hydraulic Control Valve with Controlled Flow and Valve Safety Disable |
| CN209638134U (en) * | 2019-03-08 | 2019-11-15 | 阿托斯(上海)液压有限公司 | A kind of pilot-operated type open loop two-stage proportional reversing valve |
| CN214171391U (en) * | 2020-12-23 | 2021-09-10 | 涌镇液压机械（上海）有限公司 | Proportional valve with pressure reducing and reversing functions |
-
2020
- 2020-12-23 CN CN202011537933.6A patent/CN112576781B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1416247A (en) * | 1972-12-13 | 1975-12-03 | Daimler Benz Ag | Accumulator control valve assemblies |
| EP0987444A2 (en) * | 1998-09-18 | 2000-03-22 | HydraForce, Inc. | Proportional priority flow regulator with reverse flow control |
| CN202348809U (en) * | 2011-12-13 | 2012-07-25 | 常德中联重科液压有限公司 | Pressure reducing valve |
| CN202510814U (en) * | 2012-01-12 | 2012-10-31 | 上海昀锋液压有限公司 | Stacked proportional electromagnetic flow valve |
| DE102015215267A1 (en) * | 2014-08-12 | 2016-02-18 | Xuzhou Construction Machinery Group Co., Ltd. | Function connection valve body structure and proportional multiway valve |
| US20170364102A1 (en) * | 2016-06-16 | 2017-12-21 | Parker-Hannifin Corporation | Hydraulic Control Valve with Controlled Flow and Valve Safety Disable |
| CN209638134U (en) * | 2019-03-08 | 2019-11-15 | 阿托斯(上海)液压有限公司 | A kind of pilot-operated type open loop two-stage proportional reversing valve |
| CN214171391U (en) * | 2020-12-23 | 2021-09-10 | 涌镇液压机械（上海）有限公司 | Proportional valve with pressure reducing and reversing functions |
Non-Patent Citations (1)
| Title |
|---|
| 梁宁;: "一种转阀换向的液压双缸单作用往复泵设计", 探矿工程(岩土钻掘工程), no. 08, 25 August 2011 (2011-08-25), pages 42 - 45 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446280A (en) * | 2021-06-30 | 2021-09-28 | 北京航空航天大学宁波创新研究院 | Bidirectional differential pressure controller and hydraulic equipment |
| CN113932040A (en) * | 2021-10-16 | 2022-01-14 | 涌镇液压机械（上海）有限公司 | Proportional valve for controlling opening and closing of injection molding machine |
| CN113932040B (en) * | 2021-10-16 | 2024-04-12 | 涌镇液压机械（上海）有限公司 | Proportional valve for controlling opening and closing of injection molding machine |
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| CN112576781B (en) | 2024-05-31 |
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