CN211737626U - Electro-hydraulic pressure servo valve - Google Patents
Electro-hydraulic pressure servo valve Download PDFInfo
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- CN211737626U CN211737626U CN201922359952.3U CN201922359952U CN211737626U CN 211737626 U CN211737626 U CN 211737626U CN 201922359952 U CN201922359952 U CN 201922359952U CN 211737626 U CN211737626 U CN 211737626U
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Abstract
The utility model belongs to the technical field of hydraulic pressure, especially, relate to an electricity liquid pressure servo valve. Setting a pressure sensor on the electro-hydraulic pressure servo valve to sense the brake pressure data of a brake port; the method comprises the following steps that a rotary motor is arranged, when a rotating shaft of the rotary motor rotates towards a first direction, a first oil duct is communicated with an open slot, and when the rotating shaft of the rotary motor rotates towards a second direction, a second oil duct is communicated with the open slot; the controller controls the rotating direction and the rotating angle of the rotating motor by comparing the pressure difference, so that closed-loop control is realized.
Description
Technical Field
The utility model belongs to the technical field of hydraulic pressure, especially, relate to an electricity liquid pressure servo valve.
Background
The electro-hydraulic pressure servo valve is mainly applied to an airplane hydraulic brake system and can output brake pressure in a proportional relation with an electric signal. The existing electro-hydraulic pressure servo valve rotates an armature component by applying a current signal, two nozzle cavities generate differential pressure to push a valve core to move, and when the pressure of a feedback cavity, the spring force and the control differential pressure reach a balance state, the electro-hydraulic pressure servo valve outputs stable brake pressure. The nozzle baffle type electro-hydraulic pressure servo valve has small clearance and high requirement on the cleanliness of oil, and faults are caused by blockage caused by oil pollution in use. In order to prolong the service life of the electro-hydraulic pressure servo valve, most of the existing electro-hydraulic pressure servo valves are matched with an electromagnetic hydraulic lock to work, so that the self weight of a hydraulic brake system is increased, and the reliability of the hydraulic brake system is reduced.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned circumstances of the prior art, it is an object of the present invention to provide an electro-hydraulic pressure servo valve.
The technical scheme of the utility model:
an electro-hydraulic pressure servo valve comprising: the device comprises a shell, a rotating motor, a valve core and an elastic piece;
wherein, the shell is provided with a rotating motor; the inner cavity of the shell comprises a thrust cavity and a valve core movement cavity which are communicated, and a rotating shaft of the rotating motor extends into the top of the thrust cavity of the shell and is in clearance fit with the top of the thrust cavity; an open slot for oil return is arranged on the rotating shaft;
the valve core is arranged in the valve core movement cavity, and one end of the valve core is fixedly connected with the inner wall of the valve core movement cavity through an elastic piece; the space where the elastic piece is located is a feedback cavity; an oil return port, a brake port and an oil inlet are formed in the side wall of the valve core movement cavity; the oil inlet is communicated with the top of the thrust cavity through a first oil duct; the oil return port is communicated with the top of the thrust cavity through a second oil duct; the rest thrust cavity is used for containing the oil which flows in after the first oil duct is communicated with the open slot or the oil which flows after the second oil duct is communicated with the open slot; a feedback small hole for communicating the brake port with the feedback cavity is formed in the valve core;
when the rotating shaft is at the 0 position, the valve core seals the oil inlet; when the rotating shaft rotates towards a first direction, the first oil duct is communicated with the open slot, oil enters the thrust cavity and provides a rightward thrust for the valve core, and when the thrust is greater than the elastic force of the elastic piece, the valve core is pushed to move rightward so that the oil return port is closed, and the oil inlet is communicated with the brake port;
when the pivot was rotatory towards the second direction, second oil duct and open slot intercommunication promoted the fluid in the intracavity and flowed to the oil return opening through the second oil duct, promoted the hydraulic pressure in chamber and reduced, when the restoring force of bullet spare is greater than hydraulic pressure force, promoted the valve core and move left to make the oil inlet close, oil return opening and brake mouthful intercommunication.
Further comprising: and a controller for controlling a rotation direction and a rotation angle of the rotating electric machine.
Further comprising: a pressure sensor; the pressure sensor is used for sensing brake pressure data of the brake port and sending the brake pressure data to the controller; the controller adjusts the rotation direction and rotation angle of the rotating motor according to the brake pressure data.
The controller controls the rotation of the rotating motor by comparing the pressure difference, so that closed-loop control is realized.
The controller is a DSP chip.
The spring is a spring.
The utility model has the advantages that: 1) through setting up pressure sensor, setting up the rotating electrical machines, the controller promotes the movement of valve core through comparing differential pressure control rotating electrical machines's direction of rotation and rotation angle, exports brake pressure, realizes the closed-loop control of electric hydraulic pressure servo valve. 2) The electro-hydraulic pressure servo valve is simple in structure, relatively convenient to machine and debug and strong in pollution resistance.
Description of the drawings:
fig. 1 is a schematic structural diagram of an electro-hydraulic pressure servo valve of the present invention.
Wherein, 1-shell, 2-rotating electrical machines, 3-pressure sensor, 4-controller, 5-valve core, 6-spring.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
Please refer to fig. 1, which is a schematic structural diagram of the electrohydraulic pressure servo valve of the present invention. As shown in the figures, the electro-hydraulic pressure servo valve of the utility model comprises a shell 1, a rotating motor 2, a pressure sensor 3, a controller 4, a valve core 5 and a spring 6, wherein the rotating motor 2 is installed on the shell 1, the inner cavity of the shell 1 comprises a thrust cavity and a valve core 5 movement cavity which are communicated, and a rotating shaft of the rotating motor 2 extends into the top of the thrust cavity of the shell 1 and is in clearance fit with the top of the thrust cavity; an open slot for oil return is arranged on the rotating shaft;
the valve core 5 is arranged in the valve core 5 motion cavity, and one end of the valve core 5 motion cavity is fixedly connected with the inner wall of the valve core 5 motion cavity through a spring 6; the space where the spring 6 is located is a feedback cavity; an oil return port, a brake port and an oil inlet are formed in the side wall of the motion cavity of the valve core 5; the oil inlet is communicated with the top of the thrust cavity through a first oil duct; the oil return port is communicated with the top of the thrust cavity through a second oil duct; the rest thrust cavity is used for containing the oil which flows in after the first oil duct is communicated with the open slot or the oil which flows after the second oil duct is communicated with the open slot; a feedback small hole for communicating the brake port with the feedback cavity is formed in the valve core 5;
when the rotating shaft is at the 0 position, the valve core 5 seals the oil inlet; when the rotating shaft rotates towards the first direction, the first oil duct is communicated with the open slot, oil enters the thrust cavity and provides a rightward thrust to the valve core 5, and when the thrust is greater than the elastic force of the spring 6, the valve core 5 is pushed to move rightwards, so that the oil return port is closed, and the oil inlet is communicated with the brake port;
when the pivot was rotatory towards the second direction, second oil duct and open slot intercommunication promoted the fluid in the intracavity and flowed to the oil return opening through the second oil duct, promoted the hydraulic pressure in chamber and reduced, when the restoring force of spring 6 was greater than hydraulic pressure force, pushed case 5 and moved left to make the oil inlet close, oil return opening and brake mouthful intercommunication.
According to the electro-hydraulic pressure servo valve, the electro-hydraulic pressure servo valve is provided with the pressure sensor to sense the brake pressure data of the brake port; the rotating motor is arranged, when a rotating shaft of the rotating motor rotates towards a first direction, the first oil duct is communicated with the open slot, and when the rotating shaft rotates towards a second direction, the second oil duct is communicated with the open slot.
The controller controls the rotating direction and the rotating angle of the rotating motor by comparing the pressure difference, so that closed-loop control is realized.
The rotary motor rotates to drive the valve core to work at the position below, and when the rotating shaft of the rotary motor is at the 0 position, the valve core seals the oil inlet and communicates braking and oil return; when the rotating shaft rotates towards a first direction, the first oil duct is communicated with the open slot, oil enters the thrust cavity and provides a rightward thrust for the valve core, and when the thrust is greater than the elastic force of the spring, the valve core is pushed to move rightward so that the oil return port is closed, and the oil inlet is communicated with the brake port; when the rotating shaft rotates towards the second direction, the second oil duct is communicated with the open slot, oil in the pushing cavity flows to the oil return port through the second oil duct, hydraulic pressure of the pushing cavity is reduced, and when restoring force of the spring is larger than hydraulic pressure, the valve core is pushed to move leftwards, so that the oil inlet is closed, and the oil return port is communicated with the brake port.
The utility model discloses an electricity liquid pressure servo valve adopts following mode work:
when the electro-hydraulic pressure servo valve does not give a signal to the controller, the rotating shaft of the rotating motor 2 is located at 0 position, the valve core 5 seals the oil inlet, and no brake pressure is output at the moment. When the controller 4 controls the rotating shaft of the rotating motor 2 to rotate towards the first direction, high-pressure oil enters the thrust cavity, the valve core 5 is pushed to move rightwards, the oil return oil way is closed, the oil inlet is communicated with the brake opening, the pressure sensor 3 collects brake pressure, the controller 4 continues to control the rotating direction and the rotating angle of the rotating motor 2 by comparing the pressure difference between the oil inlet and the brake opening until the pressure difference is zero, and stable brake pressure is output. When the controller 4 controls the rotating shaft of the rotating motor 2 to rotate towards the second direction, oil in the cavity is pushed to flow to the oil return port through the second oil duct, the spring 6 pushes the valve element to move leftwards, the oil inlet is closed, the oil return port is communicated with the brake port, and no brake pressure is output.
Claims (6)
1. An electro-hydraulic pressure servo valve, comprising: the device comprises a shell, a rotating motor, a valve core and an elastic piece;
wherein, the shell is provided with a rotating motor; the inner cavity of the shell comprises a thrust cavity and a valve core movement cavity which are communicated, and a rotating shaft of the rotating motor extends into the top of the thrust cavity of the shell and is in clearance fit with the top of the thrust cavity; an open slot for oil return is arranged on the rotating shaft;
the valve core is arranged in the valve core movement cavity, and one end of the valve core is fixedly connected with the inner wall of the valve core movement cavity through an elastic piece; the space where the elastic piece is located is a feedback cavity; an oil return port, a brake port and an oil inlet are formed in the side wall of the valve core movement cavity; the oil inlet is communicated with the top of the thrust cavity through a first oil duct; the oil return port is communicated with the top of the thrust cavity through a second oil duct; the rest thrust cavity is used for containing the oil which flows in after the first oil duct is communicated with the open slot or the oil which flows after the second oil duct is communicated with the open slot; a feedback small hole for communicating the brake port with the feedback cavity is formed in the valve core;
when the rotating shaft is at the 0 position, the valve core seals the oil inlet; when the rotating shaft rotates towards a first direction, the first oil duct is communicated with the open slot, oil enters the thrust cavity and provides a rightward thrust for the valve core, and when the thrust is greater than the elastic force of the elastic piece, the valve core is pushed to move rightward so that the oil return port is closed, and the oil inlet is communicated with the brake port;
when the pivot was rotatory towards the second direction, second oil duct and open slot intercommunication promoted the fluid in the intracavity and flowed to the oil return opening through the second oil duct, promoted the hydraulic pressure in chamber and reduced, when the restoring force of bullet spare is greater than hydraulic pressure force, promoted the valve core and move left to make the oil inlet close, oil return opening and brake mouthful intercommunication.
2. The electro-hydraulic pressure servo valve of claim 1, further comprising: and a controller for controlling a rotation direction and a rotation angle of the rotating electric machine.
3. The electro-hydraulic pressure servo valve of claim 2, further comprising: a pressure sensor; the pressure sensor is used for sensing brake pressure data of the brake port and sending the brake pressure data to the controller; the controller adjusts the rotation direction and rotation angle of the rotating motor according to the brake pressure data.
4. The electro-hydraulic pressure servo valve of claim 3, wherein the controller controls the rotation of the rotary motor by comparing the differential pressure to achieve closed loop control.
5. The electro-hydraulic pressure servo valve of claim 4, wherein the controller is a DSP chip.
6. The electro-hydraulic pressure servo valve of claim 1, wherein the resilient member is a spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922359952.3U CN211737626U (en) | 2019-12-24 | 2019-12-24 | Electro-hydraulic pressure servo valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922359952.3U CN211737626U (en) | 2019-12-24 | 2019-12-24 | Electro-hydraulic pressure servo valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211737626U true CN211737626U (en) | 2020-10-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922359952.3U Active CN211737626U (en) | 2019-12-24 | 2019-12-24 | Electro-hydraulic pressure servo valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211737626U (en) |
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2019
- 2019-12-24 CN CN201922359952.3U patent/CN211737626U/en active Active
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