Driving module of hydraulic valve with reset spring

Abstract

The invention provides a hydraulic valve driving module with a reset spring, and relates to the technical field of hydraulic valves, the hydraulic valve driving module comprises a shell, a rear cover and a base plate, a driving assembly and a position sensing assembly are arranged in the shell, the driving assembly comprises a rack driven by a driving motor through a gear pair, the rack is connected with an inner spring seat, and the spring can be compressed to store energy through bidirectional movement of a valve element. The position sensing assembly adopts a magnetostrictive displacement measurement scheme that a magnetic ring moves along with a rack and a measuring rod is fixed, real-time accurate detection and closed-loop control of the position of the valve element are achieved, in addition, the module integrates an electromagnetic damper which is connected with an outer spring seat, controllable damping can be provided to achieve buffering when the valve element is reset, and the electromagnetic damper type electromagnetic valve is compact in structure, high in integration level and high in reliability. The size is effectively reduced, and the control precision, the movement stability and the overall reliability of valve element driving are remarkably improved by combining position closed-loop feedback and a spring-damping cooperative reset mechanism.

Description

Technical Field

[0001] This invention relates to the field of hydraulic valve technology, and in particular to a drive module for a hydraulic valve with a return spring. Background Technology

[0002] Hydraulic valves are automated components operated by pressurized oil. They control the pressure, flow, and direction of the liquid to open and close pipeline systems. They are usually used in combination with solenoid pressure regulating valves to achieve remote control of the clamping, control, and lubrication of oil, gas, and water pipeline systems in hydropower stations. With the advancement of electrification, electric motors and electronic controls are gradually being applied in the hydraulic industry.

[0003] However, the existing hydraulic valve drive module is not tightly integrated with the hydraulic valve, resulting in a large overall size and rigid layout, which is a significant disadvantage, especially in the field of mobile hydraulics where size is a critical factor. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies, such as insufficient integration between the hydraulic valve drive module and the hydraulic valve, large overall size, and rigid layout, which are particularly disadvantageous in the field of mobile hydraulics where size is a critical factor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a drive module for a hydraulic valve with a return spring, comprising a housing, a rear cover, and a base plate, wherein the housing and the rear cover are respectively fixedly installed at the front and rear ends of the base plate, and the housing is provided with a spring chamber, and further comprising: A drive assembly installed in the spring chamber is used to drive the hydraulic valve core. The drive assembly includes an inner spring seat and an outer spring seat, both of which are slidably installed in the housing. A set screw is slidably inserted between the inner spring seat and the outer spring seat. A return spring is provided between the inner spring seat and the outer spring seat. When the valve core moves outward, the inner spring seat compresses the return spring, and the outer spring seat remains stationary. When the valve core moves inward, the outer spring seat compresses the return spring, and the inner spring seat remains stationary. A position sensing component installed within the housing is used to detect the linear displacement of the drive component and the valve core directly connected thereto in real time and with high accuracy, thereby achieving closed-loop control of the valve core position.

[0006] In at least some embodiments, a drive motor is fixedly mounted on the substrate, a drive gear is fixedly mounted on the output shaft of the drive motor, a speed-changing gear that meshes with the drive gear is rotatably mounted on the substrate, and a transmission gear is fixedly mounted on the other end of the shaft of the speed-changing gear.

[0007] In at least some embodiments, the diameter of the transmission gear is larger than the diameter of the drive gear to increase the torque of the transmission gear.

[0008] In at least some embodiments, the drive assembly further includes a rack and a rack connector, a rack bracket is fixedly installed inside the housing, the rack is slidably installed inside the rack bracket, the rack is meshed with a transmission gear, a rack bearing is rotatably installed inside the rack bracket to improve the smoothness of rack translation, and the rack connector is fixedly inserted into the rack and the inner spring seat.

[0009] In at least some embodiments, the housing is provided with a sealed interface for leading out signal lines of the drive assembly and the position sensing assembly.

[0010] In at least some embodiments, a spring chamber cover plate is fixedly installed at one end of the spring chamber, and an electromagnetic damper is fixedly installed on the spring chamber cover plate. The movable output rod of the electromagnetic damper is connected to the center of the outer spring seat through a ball joint.

[0011] In at least some embodiments, the axis of the electromagnetic damper is substantially coincident with the axis of motion of the return spring and the rack.

[0012] In at least some embodiments, the position sensing component includes a ring seat and a measuring rod. Two ring seats are provided and symmetrically fixedly installed. A magnetic ring is fixedly clamped between the two ring seats. The magnetic ring is fixedly installed on the rack through the ring seats. The measuring rod has rod seats fixedly installed at both ends and is fixedly installed on the inner wall of the housing through the rod seats. The measuring rod passes through the magnetic ring and the axis of the measuring rod coincides with the axis of the magnetic ring. The axis of the measuring rod is parallel to the axis of the rack.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. In this invention, by highly integrating the drive component, position sensing component and electromagnetic damper into the same housing and compactly arranging them with the gear transmission mechanism, the overall module size and space occupied are significantly reduced, making it particularly suitable for mobile hydraulic equipment with strict size requirements.

[0014] 2. In this invention, a magnetostrictive displacement sensor is used to detect the valve core position in real time, realizing high-precision closed-loop control. At the same time, the synergistic effect of the return spring and the electromagnetic damper not only provides a reliable bidirectional return force for the valve core, but also dynamically buffers and precisely controls the speed and endpoint of the return process, improving the stability, response speed and reliability of the system operation. Attached Figure Description

[0015] Figure 1 This invention provides an overall three-dimensional schematic diagram of a hydraulic valve drive module with a return spring. Figure 2 This invention provides a schematic diagram of the internal structure of a hydraulic valve drive module with a return spring. Figure 3This invention provides a schematic diagram of the substrate structure in the drive module of a hydraulic valve with a return spring. Figure 1 ; Figure 4 This invention provides a schematic diagram of the substrate structure in the drive module of a hydraulic valve with a return spring. Figure 2 ; Figure 5 This invention provides a schematic diagram of the rack and pinion bracket structure in the drive module of a hydraulic valve with a return spring. Figure 6 This invention provides a schematic diagram of the installation of the drive component and the position sensing component in the drive module of a hydraulic valve with a return spring. Figure 7 This invention provides a schematic diagram of the drive assembly in the drive module of a hydraulic valve with a return spring. Figure 8 This invention presents a schematic diagram of the position sensing component in the drive module of a hydraulic valve with a return spring.

[0016] Legend: 1. Housing; 101. Rack support; 102. Rack bearing; 103. Spring chamber; 104. Sealing interface; 105. Spring chamber cover; 106. Electromagnetic damper; 2. Back cover; 3. Substrate; 301. Drive motor; 302. Drive gear; 303. Speed-changing gear; 304. Transmission gear; 4. Drive assembly; 401. Rack; 402. Rack connector; 403. Inner spring seat; 404. Set screw; 405. Outer spring seat; 406. Return spring; 5. Position sensing component; 501. Ring seat; 502. Measuring rod; 503. Magnetic ring; 504. Rod seat. Detailed Implementation

[0017] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0018] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0019] according to Figures 1-8 The driving module for a hydraulic valve with a return spring provided in this embodiment of the invention includes a housing 1, a rear cover 2, and a base plate 3, as shown below. Figure 1 and Figure 2As shown, the housing 1 and the rear cover 2 are respectively fixedly installed at the front and rear ends of the base plate 3. The housing 1 is provided with a spring chamber 103, and also includes a drive assembly 4 installed in the spring chamber 103 for driving the hydraulic valve core, such as... Figure 6 and Figure 7 As shown, the drive assembly 4 includes an inner spring seat 403 and an outer spring seat 405. Both the inner spring seat 403 and the outer spring seat 405 are slidably installed in the housing 1. A set screw 404 is slidably inserted between the inner spring seat 403 and the outer spring seat 405. A return spring 406 is provided between the inner spring seat 403 and the outer spring seat 405. When the valve core moves outward, the inner spring seat compresses the return spring 406. At this time, the outer spring seat 405 remains stationary in its original position. When the valve core moves inward, the outer spring seat 405 compresses the return spring 406. At this time, the inner spring seat remains stationary in its original position. The position sensing assembly 5 installed in the housing 1 is used to detect the linear displacement of the drive assembly 4 and the valve core directly connected to it in real time and accurately, thereby realizing closed-loop control of the valve core position. The return spring 406 between the inner spring seat 403 and the outer spring seat 405 is always in a pre-compressed state, providing bidirectional return force for the valve core. The rack connector 402 is fixedly connected to the rack 401 and the inner spring seat 403, so that the linear motion of the rack 401 can be directly transmitted to the inner spring seat 403.

[0020] like Figure 2 As shown, a sealed interface 104 is provided on the housing 1 for leading out signal lines from the drive assembly 4 and the position sensing assembly 5. A spring chamber cover 105 is fixedly installed at one end of the spring chamber 103, and an electromagnetic damper 106 is fixedly installed on the spring chamber cover 105. The movable output rod of the electromagnetic damper 106 is connected to the center of the outer spring seat 405 via a ball joint. The axis of the electromagnetic damper 106 is substantially coincident with the movement axes of the return spring 406 and the rack 401. The electromagnetic damper 106 and the return spring 406 are connected in parallel and act together on the outer spring seat 405. When the valve core moves and compresses the return spring 406, the electromagnetic damper 106 can be in a free state or provide slight damping. When the valve core resets under the action of the return spring 406, the electromagnetic damper 106 can receive a control signal to provide a controllable damping force to adjust the reset speed and achieve buffering at the end of the stroke to avoid impact.

[0021] like Figure 3 and Figure 4As shown, a drive motor 301 is fixedly mounted on the base plate 3. A drive gear 302 is fixedly mounted on the output shaft of the drive motor 301. A variable speed gear 303 that meshes with the drive gear 302 is rotatably mounted on the base plate 3. A transmission gear 304 is fixedly mounted on the other end of the shaft of the variable speed gear 303. The diameter of the variable speed gear 303 is larger than the diameter of the drive gear 302 to increase the torque of the transmission gear 304. The drive motor 301 is preferably a servo motor or a stepper motor. It receives external control signals and drives the drive gear 302 to rotate. Through the speed reduction and torque increase effect of the variable speed gear 303, the power is transmitted to the transmission gear 304.

[0022] like Figure 7 As shown, the drive assembly 4 also includes a rack 401 and a rack connector 402. A rack bracket 101 is fixedly installed inside the housing 1. The rack 401 is slidably installed inside the rack bracket 101. The rack 401 is meshed with the transmission gear 304. A rack bearing 102 is rotatably installed inside the rack bracket 101 to improve the smoothness of the translation of the rack 401. The rack connector 402 is fixedly inserted into the rack 401 and the inner spring seat 403. The meshing of the rack 401 with the transmission gear 304 converts the rotational motion of the transmission gear 304 into the linear motion of the rack 401, thereby driving the hydraulic valve core connected to the end of the rack 401. When rack 401 moves to the left, it drives inner spring seat 403 to move to the left via rack connector 402, compressing return spring 406 located between inner spring seat 403 and outer spring seat 405. At this time, outer spring seat 405 is limited and held stationary by spring cavity cover plate 105 or housing structure, and return spring 406 stores energy. When rack 401 moves to the right, it drives inner spring seat 403 and outer spring seat 405 connected to it via rack connector 402 to move to the right together. Return spring 406 is compressed between outer spring seat 405 and fixed inner spring seat 403 (at this time, inner spring seat 403 is driven by rack connector 402, but due to relative motion, it can be regarded as the pushing end relative to outer spring seat 405), and also stores energy. Regardless of which direction the valve core is driven, return spring 406 is compressed and stores energy.

[0023] like Figure 8As shown, the position sensing component 5 includes a ring seat 501 and a measuring rod 502. Two ring seats 501 are provided and symmetrically fixedly installed. A magnetic ring 503 is fixedly clamped between the two ring seats 501. The magnetic ring 503 is fixedly mounted on the rack 401 through the ring seats 501. Rod seats 504 are fixedly installed at both ends of the measuring rod 502 and are fixedly mounted on the inner wall of the housing 1 through the rod seats 504. The measuring rod 502 passes through the magnetic ring 503, and the axis of the measuring rod 502 coincides with the axis of the magnetic ring 503. The axis of the measuring rod 502 is parallel to the axis of the rack 401. The position sensing component 5 constitutes a magnetostrictive displacement measurement system. The measuring rod 502 contains a magnetostrictive waveguide, and the magnetic ring 503 acts as a position magnet, moving with the rack 401. When the electronic head (usually located at one end of the probe 502, with the signal line leading out from the sealed interface 104) emits an electrical pulse, a magnetic field is generated along the waveguide. This magnetic field interacts with the permanent magnetic field of the magnetic ring 503 to produce a strain pulse. This pulse propagates back to the electronic head and is detected. By measuring the time difference between pulse transmission and reception, the absolute position of the magnetic ring 503, i.e., the real-time linear displacement of the rack 401 and the valve core, can be accurately calculated. This displacement signal is fed back to the external controller and compared with the controller's commanded position to form a closed-loop control, thereby achieving precise control of the valve core position.

[0024] Detailed Working Process: When the hydraulic valve spool needs to be moved, the external controller sends a command to the drive motor 301. The drive motor 301 rotates, driving the drive gear 302, the transmission gear 303, and the drive gear 304 to rotate. The drive gear 304 drives the meshing rack 401 to move linearly along the rack support 101. The rack 401 pushes the hydraulic valve spool to move through the rack connector 402, realizing the opening and closing or reversing of the hydraulic valve. While the rack 401 is moving, the position sensing component 5 monitors its displacement in real time and feeds back a high-precision position signal to the controller. The controller adjusts the rotation of the drive motor 301 accordingly to achieve closed-loop precise control of the valve spool position. During the driving process, the return spring 406 is compressed and stores energy according to the direction of valve spool movement (such as moving left or right as mentioned above). When the valve spool needs to be reset to the neutral or initial position, the controller can control the drive motor 301 to stop or reverse its movement. At this point, the compressed return spring 406 releases its stored elastic energy, pushing the corresponding spring seat (inner spring seat 403 or outer spring seat 405), which in turn drives the valve core to reset via the rack connector 402 and rack 401. During this reset process, the controller can send control signals to the electromagnetic damper 106 according to a preset program to dynamically adjust the magnitude of its output damping force. For example, a smaller damping is provided at the beginning of the reset for rapid start-up, and the damping is increased at the end of the reset to achieve smooth buffering, effectively suppressing shocks and vibrations. The speed and endpoint position of the entire reset process can be monitored and corrected through feedback from the position sensor, ensuring the consistency, smoothness, and accuracy of the reset action.

[0025] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A drive module for a hydraulic valve with a return spring, comprising a housing (1), a rear cover (2), and a base plate (3), characterized in that: The housing (1) and the rear cover (2) are respectively fixedly installed at the front and rear ends of the base plate (3). The housing (1) is provided with a spring chamber (103) and also includes: A drive assembly (4) installed in the spring chamber (103) is used to drive the hydraulic valve core. The drive assembly (4) includes an inner spring seat (403) and an outer spring seat (405). The inner spring seat (403) and the outer spring seat (405) are slidably installed in the housing (1). A set screw (404) is slidably inserted between the inner spring seat (403) and the outer spring seat (405). A return spring (406) is provided between the inner spring seat (403) and the outer spring seat (405). When the valve core moves outward, the inner spring seat compresses the return spring (406). At this time, the outer spring seat (405) remains stationary in its original position. When the valve core moves inward, the outer spring seat (405) compresses the return spring (406). At this time, the inner spring seat remains stationary in its original position. The position sensing component (5) installed in the housing (1) is used to detect the linear displacement of the drive component (4) and the valve core directly connected thereto in real time and accurately, thereby realizing closed-loop control of the valve core position.

2. The drive module for a hydraulic valve with a return spring according to claim 1, characterized in that: A drive motor (301) is fixedly mounted on the base plate (3). A drive gear (302) is fixedly mounted on the output shaft of the drive motor (301). A speed-changing gear (303) that meshes with the drive gear (302) is rotatably mounted on the base plate (3). A transmission gear (304) is fixedly mounted on the other end of the shaft of the speed-changing gear (303).

3. The drive module for a hydraulic valve with a return spring according to claim 2, characterized in that: The diameter of the transmission gear (303) is larger than that of the drive gear (302) to increase the torque of the transmission gear (304).

4. The drive module for a hydraulic valve with a return spring according to claim 1, characterized in that: The drive assembly (4) further includes a rack (401) and a rack connector (402). A rack bracket (101) is fixedly installed inside the housing (1). The rack (401) is slidably installed inside the rack bracket (101). The rack (401) is meshed with a transmission gear (304). A rack bearing (102) is rotatably installed inside the rack bracket (101) to improve the smoothness of the rack (401) translation. The rack connector (402) is fixedly inserted into the rack (401) and the inner spring seat (403).

5. The drive module for a hydraulic valve with a return spring according to claim 1, characterized in that: The housing (1) is provided with a sealed interface (104) for leading out signal lines of the drive assembly (4) and the position sensing assembly (5).

6. The drive module for a hydraulic valve with a return spring according to claim 1, characterized in that: A spring chamber cover plate (105) is fixedly installed at one end of the spring chamber (103), and an electromagnetic damper (106) is fixedly installed on the spring chamber cover plate (105). The movable output rod of the electromagnetic damper (106) is connected to the center of the outer spring seat (405) through a ball joint.

7. The drive module for a hydraulic valve with a return spring according to claim 6, characterized in that: The axis of the electromagnetic damper (106) is substantially coincident with the axis of motion of the return spring (406) and the rack (401).

8. The drive module for a hydraulic valve with a return spring according to claim 1, characterized in that: The position sensing component (5) includes a ring seat (501) and a measuring rod (502). Two ring seats (501) are provided and symmetrically fixedly installed. A magnetic ring (503) is fixedly clamped between the two ring seats (501). The magnetic ring (503) is fixedly installed on the rack (401) through the ring seat (501). The measuring rod (502) has rod seats (504) fixedly installed at both ends and is fixedly installed on the inner wall of the housing (1) through the rod seats (504). The measuring rod (502) passes through the magnetic ring (503) and the axis of the measuring rod (502) coincides with the axis of the magnetic ring (503). The axis of the measuring rod (502) is parallel to the axis of the rack (401).

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