CN216430105U - Electro-hydraulic pressure reducing valve - Google Patents
Electro-hydraulic pressure reducing valve Download PDFInfo
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- CN216430105U CN216430105U CN202123412041.6U CN202123412041U CN216430105U CN 216430105 U CN216430105 U CN 216430105U CN 202123412041 U CN202123412041 U CN 202123412041U CN 216430105 U CN216430105 U CN 216430105U
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Abstract
The utility model belongs to the technical field of the brake valve, a electro-hydraulic pressure reducing valve is disclosed, mainly used solve current relief pressure valve and adopt machinery or hydraulic means's drive structure complicacy and the difficult problem of control regulation output pressure. The utility model discloses utilize the pivot output of motor, it is rotatory to drive the regulation double-screw bolt, and order about the spring acting through adjusting the swivel nut, further drive piston control intercommunication oil inlet and oil-out passageway again, make the valve work, and keep the constant voltage of output fluid through the balanced state between hydraulic pressure force and the spring force, compact structure is reasonable, wherein the power take off loss is little, output efficiency is high, can stably drive valve work, and the telex mode only need press the switch can, the simple operation is laborsaving, and response speed is fast, can also control the different operating pressure of fluid output through setting for different gears, high adaptability, can adjust the output pressure of hydraulic oil more accurately, stable operation.
Description
Technical Field
The utility model belongs to the technical field of the brake valve, more specifically say, involve an electro-hydraulic pressure reducing valve.
Background
At present, in the braking system of the airplane, the automobile, the helicopter and other machines, a pressure reducing valve is a very important component, and is a valve which reduces the inlet pressure to the required outlet pressure and enables the medium to be output stably at the outlet pressure. Specifically, the throttling element realizes pressure loss by changing the throttling area and controlling the flow rate of a medium; and further, the pressure reducing valve can also be regulated and controlled to balance the fluctuation of the pressure behind the valve with the spring force, and finally, the constant pressure behind the valve is output.
At present, a pressure reducing valve for a brake system in China mainly drives the pressure reducing valve to work by means of a mechanical or hydraulic device, namely when the system receives a brake signal, the mechanical or hydraulic device provides driving force to enable the pressure reducing valve to work, the driving force is transmitted to a brake by hydraulic oil, and then a brake caliper is driven to hold a brake disc, so that the purpose of braking and speed reduction is achieved. However, in the control mode, a driver is required to step on the brake pedal to serve as a starting signal, and the operation of the valve is completed by the aid of the boosting system, so that the structure is complex, the braking force cannot be accurately controlled, and the hydraulic oil output stability is not high.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an electricity liquid relief pressure valve, it adopts motor drive valve work, and response speed is fast to can control fluid output pressure's size through changing motor turned angle, the reliable operation, the degree of accuracy is high.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the electro-hydraulic pressure reducing valve comprises an oil inlet, an oil outlet, a piston and a piston driving device, wherein the piston driving device comprises a motor, an adjusting stud connected to a rotating shaft of the motor and an adjusting threaded sleeve in threaded fit with the adjusting stud, and a spring is arranged between the adjusting threaded sleeve and the piston.
Furthermore, the adjusting device also comprises a spring sleeve and a limit screw, wherein the adjusting stud, the adjusting threaded sleeve and the spring are all positioned in the spring sleeve, the limit screw penetrates through the spring sleeve and is installed on the adjusting threaded sleeve, and an axial sliding groove matched with the limit screw is further formed in the spring sleeve.
Furthermore, a plane thrust bearing is further sleeved on the adjusting screw sleeve, a seat ring of the plane thrust bearing is connected with the spring sleeve, and a shaft ring of the plane thrust bearing is connected with the adjusting screw sleeve.
Further, the spring is a rectangular spring.
Furthermore, the oil inlet is communicated with the oil outlet through an oil inlet cavity, a mandrel is axially arranged in the oil inlet cavity, a sealing pair is formed between the mandrel and an outlet of the oil inlet cavity, a reset spring is sleeved on the mandrel, and the upper end of the mandrel extends out of the oil inlet cavity.
Furthermore, a sealing pair structure between the mandrel and the outlet of the oil inlet cavity is a metal conical surface seal.
Further, the oil outlet is communicated with the pressure sensor, and a connecting channel between the pressure sensor and the oil outlet and the lower end of the mandrel form a sealing pair.
Furthermore, the oil return device further comprises an oil return port, a return channel communicated with the oil return port and the oil outlet is arranged on the piston, and a sealing pair is formed between the upper end of the mandrel and an outlet of the return channel.
Further, still include the valve body, the valve body is connected with the spring housing, is equipped with the piston seat between piston and the valve body, and all is equipped with the sealing washer between piston seat and the piston, between piston seat and the valve body.
Furthermore, the valve further comprises an adjusting spring, and the adjusting spring is axially connected to the piston and the valve body.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses utilize the pivot output of motor, it is rotatory to drive the regulation double-screw bolt, and order about the spring acting through adjusting the swivel nut, further drive piston control intercommunication oil inlet and oil-out passageway again, make the valve work, and keep the constant voltage of output fluid through the balanced state between hydraulic pressure force and the spring force, compact structure is reasonable, wherein power take off loss is little, output efficiency is high, can stably drive valve work, and the telex mode only need press the switch can, the simple operation is laborsaving, and response speed is fast, can also control the different operating pressure of fluid output through setting for different gears, high adaptability, can adjust the output pressure of hydraulic oil more accurately, stable operation, can show the brake performance who improves braking system.
The adjusting stud, the adjusting threaded sleeve and the spring are all located in the spring sleeve, the limiting screw penetrates through the spring sleeve and is installed on the adjusting threaded sleeve, an axial sliding groove matched with the limiting screw is further formed in the spring sleeve, the limiting screw can prevent the adjusting stud from synchronously rotating with the adjusting threaded sleeve, power output of the motor completely acts on movement of the piston, energy loss is reduced, and accuracy of valve pressure adjustment is enhanced.
The third, still overlap and be equipped with plane thrust bearing on adjusting the swivel nut, plane thrust bearing's seat circle and spring housing are connected, and plane thrust bearing's ring is connected with adjusting the swivel nut, and plane thrust bearing can bear the axial load of one side to prevent when the valve carries out the during operation, the reaction force of hydraulic oil is used in the motor shaft and leads to the excessive wearing and tearing of motor shaft, can improve the life of motor and the output efficiency of motor shaft.
The spring adopts the rectangle spring, because when the valve carries out decompression work, the change of oil pressure can make fluid temperature rise, and the rectangle spring is high temperature resistant more than ordinary circular spring to have higher intensity and fabulous wear-resisting characteristic, it can still keep better job stabilization nature under high temperature environment, and life is longer.
Fifthly, the oil inlet is communicated with the oil outlet through an oil inlet cavity, a mandrel is axially arranged in the oil inlet cavity, a sealing pair is formed between the mandrel and the outlet of the oil inlet cavity, a reset spring is sleeved on the mandrel, the upper end of the mandrel extends out of the oil inlet cavity, the movement of a piston can act on the upper end of the mandrel, the outlet of the oil inlet cavity is opened by the mandrel, and further oil flows to the oil outlet from the oil inlet, the braking and speed reducing effects are realized, the fluctuation of oil pressure is eliminated through the balance between hydraulic pressure and spring force, the size of output oil pressure of the oil outlet can be adjusted through the rotation angle of a motor, meanwhile, the mandrel can be timely driven to reset by the reset spring after the force of the mandrel is removed, the outlet of the oil inlet cavity is closed, the pressure supply of the oil inlet is stopped, the whole structure is compact and reasonable, the pressure regulating effect is obvious, the fluctuation of the oil pressure can be well eliminated, and stable braking is ensured.
Sixthly, the sealing pair structure between the mandrel and the outlet of the oil inlet cavity is sealed by a metal conical surface, the conical surface sealing structure can generate wedge-shaped force, the sealing performance can be enhanced, zero leakage between the oil inlet and the oil outlet is realized, and the imbalance of the oil pressure of the oil inlet and the oil outlet is ensured.
Seventhly, still include pressure sensor, pressure sensor intercommunication oil-out for detect the hydraulic oil pressure of oil-out, and the interface channel between pressure sensor and the oil-out forms sealed vice with the dabber lower extreme, act on the dabber and make the dabber open the oil feed chamber export in the at utmost promptly when output oil pressure is the biggest, this interface channel just by totally enclosed, and when the dabber is totally closed this interface channel not, pressure sensor can monitor the pressure of oil-out constantly, and transmit oil pressure signal for the control unit of motor, and then the output pressure of reply motor relatively adjusts, adjust the hydraulic oil pressure of oil-out rapidly, the operational reliability of valve can be improved in such feedback setting, prevent that the hydraulic oil pressure of the inside circulation of valve is out of control.
Eighthly, the oil-saving valve further comprises an oil return port, a return channel communicated with the oil return port and an oil outlet is arranged on the piston, a sealing pair is formed between the upper end of the mandrel and an outlet of the oil return channel, and when the valve drives the mandrel to open the outlet of the oil inlet cavity through the piston, the mandrel and the oil return channel are sealed; when the pressure of the circulating oil inside the valve rises, the hydraulic pressure is gradually increased and the piston retracts by overcoming the elastic force of the spring, the mandrel is gradually returned through the reset spring to close the outlet of the oil inlet cavity, the pressure supply is stopped, the pressure of the oil inside the valve does not rise any more at the moment, the piston stops retracting, a sealing state is formed between the mandrel and the outlet of the oil return channel on the piston at the moment, the motor needs to be controlled to rotate reversely, the piston continues to retract, the mandrel is opened to form the oil return channel, the high-pressure oil inside the valve is released from the oil return opening, the oil return opening can be timely released after the pressure supply is stopped, the high-pressure oil is prevented from remaining inside the valve, the damage to the valve is caused, and the service life of the whole valve is shortened.
The valve body is connected with the spring sleeve, a piston seat is arranged between the piston and the valve body, the piston seat can play a transition role, and the accelerated abrasion of the piston and the valve body caused by the direct contact of the piston and the inner wall of the valve body can be avoided; and the sealing rings are arranged between the piston seat and the piston and between the piston seat and the inner wall of the valve body, so that no leakage and unbalance of oil pressure in the valve body can be ensured.
Ten, still include adjusting spring, adjusting spring axial connection is on piston and valve body, and adjusting spring and spring cooperate the moving stroke of control piston, not only can reduce the regulation pressure of spring, can also play certain cushioning effect to the piston, reduce the wearing and tearing speed of piston, increase the life of valve.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The hydraulic control valve comprises a valve body, a piston, a motor, an oil inlet, a piston, a pressure sensor, an oil return port, a valve body, a piston seat and an adjusting spring, wherein 1-the oil inlet, 2-the oil outlet, 3-the piston, 4-the motor, 5-the adjusting stud, 6-the adjusting threaded sleeve, 7-the spring, 8-the spring sleeve, 9-the limiting screw, 10-the plane thrust bearing, 11-the oil inlet cavity, 12-the mandrel, 13-the reset spring, 14-the pressure sensor, 15-the oil return port, 16-the valve body, 17-the piston seat and 18-the adjusting spring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The electro-hydraulic pressure reducing valve shown in fig. 1 comprises an oil inlet 1, an oil outlet 2, a piston 3 and a piston driving device, wherein the piston driving device comprises a motor 4, an adjusting stud 5 connected to a rotating shaft of the motor 4 and an adjusting threaded sleeve 6 in threaded fit with the adjusting stud 5, and a spring 7 is arranged between the adjusting threaded sleeve 6 and the piston 3.
The utility model discloses utilize motor 4's pivot output, it is rotatory to drive adjusting stud 5, and order about spring 7 acting through adjusting swivel nut 6, further drive 3 control of piston intercommunication oil inlets 1 and 2 passageways of oil-out again, make the valve work, and keep the constant voltage of output fluid through the balanced state between hydraulic pressure force and the spring 7 elasticity, compact structure is reasonable, wherein the power take off loss is little, output efficiency is high, can stably drive valve work, and the telex mode only need press the switch can, the simple operation is laborsaving, and response speed is fast, can also control the different operating pressure of fluid output through setting for different gears, high adaptability, can adjust the output pressure of hydraulic oil more accurately, stable operation, can show the brake performance who improves braking system.
Still include spring housing 8 and stop screw 9, adjusting stud 5, adjusting swivel nut 6 all are located spring housing 8 with spring 7, and stop screw 9 runs through spring housing 8 and installs on adjusting swivel nut 6, still is equipped with the axial spout with stop screw 9 looks adaptation on the spring housing 8, and stop screw 9 can prevent to adjust stud 5 and adjust swivel nut 6 synchronous rotation, makes motor 4's power take off act on piston 3's removal completely, reduces energy loss, strengthens the accuracy of valve pressure regulating.
Still the cover is equipped with plane thrust bearing 10 on adjusting swivel nut 6, plane thrust bearing 10's seat circle is connected with spring housing 8, and plane thrust bearing 10's ring is connected with adjusting swivel nut 6, and plane thrust bearing 10 can bear the axial load of one side to prevent when the valve carries out the during operation, the reaction force of hydraulic oil is used in the 1 pivot of motor and is leaded to electronic 1 pivot excessive wear, can improve the life of motor 1 and the output efficiency of the 1 pivot of motor.
An oil inlet 1 is communicated with an oil outlet 2 through an oil inlet cavity 11, a mandrel 12 is axially arranged in the oil inlet cavity 11, a sealing pair is formed between the mandrel 2 and an outlet of the oil inlet cavity 11, a reset spring 13 is sleeved on the mandrel 12, the upper end of the mandrel 12 extends out of the oil inlet cavity 11, the movement of a piston 3 can act on the upper end of the mandrel 12, the mandrel 12 opens the outlet of the oil inlet cavity 11, oil flows from the oil inlet 1 to the oil outlet 2, the braking and decelerating effects are realized, the oil pressure fluctuation is eliminated through the balance between hydraulic pressure and elastic force of a spring 7, the output oil pressure of the oil outlet 2 can be adjusted by changing the rotating angle of a motor 4, meanwhile, the reset spring 13 can timely drive the mandrel 12 to reset after the force of the mandrel 12 is removed, the outlet of the oil inlet cavity 11 is closed, the pressure supply of the oil inlet 1 is stopped, the whole structure is compact and reasonable, the pressure regulating effect is obvious, and the oil pressure fluctuation can be well eliminated, and stable braking is ensured.
The sealing pair structure between the mandrel 12 and the outlet of the oil inlet cavity 11 is a metal conical surface seal structure, the conical surface sealing structure can generate wedge-shaped force, the sealing performance can be enhanced, zero leakage between the oil inlet 1 and the oil outlet 2 is realized, and the imbalance of the oil pressure of the oil inlet 1 and the oil outlet 2 is ensured.
Still include pressure sensor 14, pressure sensor 14 communicates oil-out 2 for detect out the hydraulic oil pressure of oil-out 2, and the connecting channel between pressure sensor 14 and the oil-out 2 forms sealed vice with dabber 12 lower extreme, when the piston 3 acts on dabber 12 and makes dabber 12 open oil feed chamber 11 export in the at utmost promptly output oil pressure is the biggest, this connecting channel just is closed totally, and when dabber 12 is not totally closed this connecting channel completely, pressure sensor 14 can monitor the pressure of oil-out 2 constantly, and transmit the oil pressure signal to the control unit of motor 4, and then the output pressure of answering motor 4 relatively adjusts, adjust the hydraulic oil pressure of oil-out 2 rapidly, the operational reliability of valve can be improved in such feedback setting, prevent that the hydraulic oil pressure of the inside circulation of valve is out of control.
The oil-return valve further comprises an oil return port 15, a return channel communicated with the oil return port 15 and the oil outlet 2 is arranged on the piston 3, a sealing pair is formed between the upper end of the mandrel 12 and the outlet of the oil return channel, and when the valve drives the mandrel 12 to open the outlet of the oil inlet cavity 11 through the piston 3, the mandrel 12 and the oil return channel are sealed; when the pressure of the circulating oil inside the valve rises, the hydraulic pressure is gradually increased and the piston 3 retracts by overcoming the elasticity of the spring 7, the mandrel 12 gradually returns through the reset spring 13 to close the outlet of the oil inlet cavity 11, the pressure supply is stopped, the pressure of the oil inside the valve does not rise any more at the moment, the piston 3 stops retracting, at the moment, the mandrel 12 just forms a sealing state with the outlet of the oil return channel on the piston 3, at the moment, the motor 4 needs to be controlled to rotate reversely, the piston 3 continues to retract, the mandrel 12 is further enabled to open the oil return channel, the high-pressure oil inside the valve is released from the oil return opening 15, the oil return opening 15 can release the pressure in time after the pressure supply is stopped, the high-pressure oil is prevented from remaining inside the valve, the damage to the valve is caused, and the service life of the whole valve is shortened.
The valve body 16 is connected with the spring sleeve 8, a piston seat 17 is arranged between the piston 3 and the valve body 16, the piston seat 17 can play a transition role, and the accelerated abrasion of the piston 3 and the valve body 16 caused by direct contact of the inner wall of the valve body 16 can be avoided; and the sealing rings are arranged between the piston seat 17 and the piston 3 and between the piston seat 17 and the inner wall of the valve body 16, so that no leakage and unbalance of oil pressure in the valve body 16 can be ensured.
Still include regulating spring 18, regulating spring 18 axial connection is on piston 3 and valve body 16, and regulating spring 18 cooperates the removal stroke of control piston 3 with spring 7, not only can reduce the adjusting pressure of spring 7, can also play certain cushioning effect to piston 3, reduces the rate of wear of piston 3, increases the life of valve.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.
Claims (10)
1. The electro-hydraulic pressure reducing valve comprises an oil inlet (1), an oil outlet (2), a piston (3) and a piston driving device, and is characterized in that the piston driving device comprises a motor (4), an adjusting stud (5) connected to a rotating shaft of the motor and an adjusting swivel nut (6) in threaded fit with the adjusting stud (5), and a spring (7) is arranged between the adjusting swivel nut (6) and the piston (3).
2. The electro-hydraulic pressure reducing valve according to claim 1, further comprising a spring sleeve (8) and a limit screw (9), wherein the adjusting stud (5), the adjusting screw sleeve (6) and the spring (7) are all located in the spring sleeve (8); the limiting screw (9) penetrates through the spring sleeve (8) and is installed on the adjusting threaded sleeve (6), and an axial sliding groove matched with the limiting screw (9) is further formed in the spring sleeve (8).
3. The electro-hydraulic pressure reducing valve according to claim 2, characterized in that a plane thrust bearing (10) is further sleeved on the adjusting threaded sleeve (6), a seat ring of the plane thrust bearing (10) is connected with the spring sleeve (8), and a shaft ring of the plane thrust bearing (10) is connected with the adjusting threaded sleeve (6).
4. Electro-hydraulic pressure reducing valve according to any of claims 1 to 3, characterized in that the spring (7) is a rectangular spring.
5. The electro-hydraulic pressure reducing valve according to claim 1, wherein the oil inlet (1) is communicated with the oil outlet (2) through an oil inlet cavity (11), a mandrel (12) is axially arranged in the oil inlet cavity (11), a sealing pair is formed between the mandrel (12) and an outlet of the oil inlet cavity (11), a return spring (13) is sleeved on the mandrel (12), and the upper end of the mandrel (12) extends out of the oil inlet cavity (11).
6. The electrohydraulic reducing valve according to claim 5, characterized in that the sealing pair structure between the mandrel (12) and the outlet of the oil inlet cavity (11) is a metal conical surface seal.
7. The electro-hydraulic pressure reducing valve according to claim 5, characterized by further comprising a pressure sensor (14), wherein the pressure sensor (14) is communicated with the oil outlet (2), and a connecting channel between the pressure sensor (14) and the oil outlet (2) forms a sealing pair with the mandrel (12).
8. The electrohydraulic reducing valve according to claim 5, characterized by further comprising an oil return port (15), wherein a return channel for communicating the oil return port (15) with the oil outlet (2) is arranged on the piston (3), and a sealing pair is formed between the mandrel (12) and an outlet of the return channel.
9. The electro-hydraulic pressure reducing valve according to claim 1, further comprising a valve body (16), wherein the valve body (16) is connected with the spring sleeve (8), a piston seat (17) is arranged between the piston (3) and the valve body (16), and sealing rings are arranged between the piston seat (17) and the piston (3) and between the piston seat (17) and the valve body (16).
10. The electrohydraulic reducing valve according to claim 9, characterized in that it further comprises an adjusting spring (18), the adjusting spring (18) being axially connected to the piston (3) and the valve body (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123412041.6U CN216430105U (en) | 2021-12-31 | 2021-12-31 | Electro-hydraulic pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123412041.6U CN216430105U (en) | 2021-12-31 | 2021-12-31 | Electro-hydraulic pressure reducing valve |
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| Publication Number | Publication Date |
|---|---|
| CN216430105U true CN216430105U (en) | 2022-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123412041.6U Active CN216430105U (en) | 2021-12-31 | 2021-12-31 | Electro-hydraulic pressure reducing valve |
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| Country | Link |
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| CN (1) | CN216430105U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115539934A (en) * | 2022-11-23 | 2022-12-30 | 梁山恒源热力有限公司 | Pressure self-balancing valve of coal-fired boiler |
-
2021
- 2021-12-31 CN CN202123412041.6U patent/CN216430105U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115539934A (en) * | 2022-11-23 | 2022-12-30 | 梁山恒源热力有限公司 | Pressure self-balancing valve of coal-fired boiler |
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