A fluid direction control valve in a hydraulic system of a wind turbine
By setting up a filter and a cleaning brush in the fluid direction control valve in the hydraulic system of the wind turbine unit, the problems of internal blockage of the valve and low valve spool closure efficiency are solved, and higher seal reliability and fluid direction control flexibility are achieved.
Patent Information
- Application Number
- CN202510067889.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2025-04-04
AI Technical Summary
The existing fluid direction control valves are prone to internal blockage due to the lack of a dirt filtering mechanism and space to accommodate dirt after a long period of use, and the closing efficiency of the valve core when the reverse flow is affected.
A fluid direction control valve in the hydraulic system of the wind turbine unit is designed, and the valve seat and valve core structure in the housing are adopted. The filter mesh on the first liquid outlet pipe and the second liquid outlet pipe are arranged. The filter mesh is cleaned by using an upper cleaning brush and a lower cleaning brush, and the switching between the first liquid outlet pipe and the second liquid outlet pipe is realized by rotating the sealing plate.
Filtering dirt through the filter reduces the risk of internal blockage of the valve, improves the seal reliability and stability of the valve core and valve seat, and achieves flexible control of the fluid direction.
Smart Images
Figure CN119755162A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of control valves, and in particular to a fluid direction control valve in a hydraulic system of a wind turbine generator set. Background Art
[0002] Wind turbines are important equipment in wind power generation and have a direct impact on the economic benefits of wind power projects. Daily maintenance and equipment management must be strengthened. The existing water cooling system can ensure that the wind turbines can be cooled and operate continuously and stably under relatively high temperatures. The lubrication system can reduce component wear, extend the operating cycle of the wind turbines and achieve cold start of the wind turbines. The hydraulic system can provide power support and power control for the hydraulic power elements.
[0003] The fluid directional control valve is a key control element in the hydraulic system of a wind turbine. The fluid directional control valve is a valve that controls the direction of the fluid in the hydraulic system of a wind turbine. Its performance plays a decisive role in the controllability, safety, and economic efficiency of the wind turbine. After a long period of use, the fluid directional control valve needs to be cleaned regularly to prevent internal blockage of the fluid directional control valve. However, the existing fluid directional control valve does not have a dirt filtering mechanism or space to accommodate dirt. Dirt usually fills various positions of the fluid directional control valve, and cleaning the dirt is cumbersome. In addition, when the flow direction of the liquid changes, the valve core of the fluid directional control valve is closed only by the action of the spring. However, when the pressure of the reverse flowing liquid is large, it will hinder the closing process of the valve core and affect the closing efficiency of the valve core. Summary of the invention
[0004] In order to solve the above technical problems, the present invention provides a fluid directional control valve in a hydraulic system of a wind turbine generator set.
[0005] To achieve the above-mentioned purpose, the technical solution of a fluid directional control valve in a hydraulic system of a wind turbine generator system of the present invention is as follows: A fluid direction control valve in a hydraulic system of a wind turbine generator system comprises a housing, a valve seat is provided in the housing to divide the interior of the housing into an upper cavity and a lower cavity, a liquid inlet pipe connected to the upper cavity and a first liquid outlet pipe and a second liquid outlet pipe connected to the lower cavity are provided on the housing, a first filter screen and a second filter screen are provided on the liquid inlet of the first liquid outlet pipe and the second liquid outlet pipe, respectively, a sewage pipe connected to the lower end of the lower cavity is provided on the housing, a valve core is installed in the upper cavity for guiding, a first driving mechanism is provided on the housing to drive the valve core to move downward so that the valve core and the valve seat are sealed, a reset spring is provided in the upper cavity to move the valve core upward so that the valve core and the valve seat are unsealed, a sleeve is rotatably installed in the lower cavity, and a A second driving mechanism for driving the sleeve to rotate, the sleeve is fixedly connected with a sealing plate which cooperates with the inner wall of the shell for sliding sealing and sealing the first liquid outlet pipe or the second liquid outlet pipe, the lower end of the valve core is rotatably installed with a rotating shaft, the lower end of the rotating shaft extends into the sleeve, the rotating shaft is provided with a forward thread section and a reverse thread section, the forward thread section is provided with an upper cleaning brush, the reverse thread section is provided with a lower cleaning brush, the sleeve is provided with a slide groove for the upper and lower cleaning brushes to move up and down, the rotating shaft and the sleeve are provided with a limiting structure which is fixed to the sleeve when the rotating shaft moves downward, the upper end of the rotating shaft extends into the interior of the valve core, the interior of the valve core is provided with a driving motor, and the output shaft of the driving motor and the rotating shaft can be connected by a split electromagnetic coupling.
[0006] Furthermore, the shell includes a columnar body, a truncated cone block is provided at the bottom of the body, the sleeve is rotatably mounted on the truncated cone block through a bearing, an upper flange is provided at the upper end of the body, and a lower flange is provided at the lower end, the shell includes a base and a fixed box, the fixed box is fixedly connected to the upper flange through the fixed box flange, and the base is fixedly connected to the lower flange through the base flange.
[0007] Furthermore, the first driving mechanism includes an electromagnet and a magnet block, the upper end of the valve core is fixedly connected to a guide rod, the upper end of the guide rod extends into a fixed box, the magnet block is fixedly connected to the upper end of the guide rod, and the electromagnet is fixedly connected to the top of the fixed box.
[0008] Furthermore, a connecting plate is fixedly connected to the guide rod, the return spring is sleeved on the guide rod, the upper end of the return spring is fixedly connected to the connecting plate, and the lower end of the return spring is fixedly connected to the upper side of the valve seat.
[0009] Furthermore, the valve core includes a large-diameter cylindrical section, a conical section and a small-diameter cylindrical section that are integrally formed from top to bottom, the outer wall of the small-diameter cylindrical section is sealed with the valve mouth of the valve seat, the drive motor is fixedly connected to the top of the large-diameter cylindrical section through a fixing frame, and the split electromagnetic clutch includes an input part and an output part, the input part is fixedly connected to the lower end of the output shaft of the drive motor, and the output part is fixedly connected to the upper end of the rotating shaft.
[0010] Furthermore, two fixing rods spaced apart from each other are provided on the outer wall of the sleeve, and ends of the fixing rods are fixedly connected to the sealing plate.
[0011] Furthermore, the upper cleaning brush includes an upper screw sleeve, an upper connecting rod and an upper brush body, the upper screw sleeve is threadedly connected to the forward thread segment, the two ends of the upper connecting rod are respectively fixedly connected to the upper screw sleeve and the upper brush body, and the upper connecting rod matches the slide groove; the lower cleaning brush includes a lower screw sleeve, a lower connecting rod and a lower brush body, the lower screw sleeve is threadedly connected under the reverse thread segment, the two ends of the lower connecting rod are respectively fixedly connected to the lower screw sleeve and the lower brush body, and the lower connecting rod matches the slide groove.
[0012] Furthermore, the second driving mechanism includes a reduction motor, which is fixedly connected to the bottom of the base, and the output shaft of the reduction motor extends into the base. The lower end of the sleeve is fixedly connected with a connecting shaft, and the output shaft of the reduction motor and the connecting shaft are fixedly connected through a coupling.
[0013] Furthermore, the limiting structure includes a plurality of limiting plates fixedly connected to the outer wall of the rotating shaft, and the plurality of limiting plates are evenly spaced along the circumference of the rotating shaft. The limiting structure also includes a plurality of limiting grooves arranged at the upper end of the sleeve, and the plurality of limiting grooves correspond vertically one-to-one with the plurality of limiting plates.
[0014] The present invention provides a fluid directional control valve in a hydraulic system of a wind turbine generator set. Compared with the prior art, the present invention has the following beneficial effects: The fluid direction control valve in the hydraulic system of the wind turbine unit of the present invention can realize the switching of the first liquid outlet pipe and the second liquid outlet pipe by rotating the sealing plate, and the sealing plate seals the first liquid outlet pipe or the second liquid outlet pipe, so as to meet the fluid direction control requirements of the hydraulic system. By arranging a filter screen on the first liquid outlet pipe and the second liquid outlet pipe, the fluid impurities in the control valve can be filtered, and the filtered impurities can be temporarily stored at the bottom of the control valve. By arranging an upper cleaning brush and a lower cleaning brush, the filter screen can be cleaned. When the sealing plate rotates, it can drive the upper cleaning brush and the lower cleaning brush to rotate synchronously, so that the upper cleaning brush and the lower cleaning brush can move to the unsealed filter screen when the first liquid outlet pipe and the second liquid outlet pipe are switched, ensuring that the cleaning brush can be used normally after the switching. The valve core is sealed with the valve seat under the action of electromagnetic force, which improves the sealing reliability and stability of the valve core and the valve seat. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of a fluid directional control valve in a hydraulic system of a wind turbine generator set of the present invention; Figure 2 yes Figure 1 The enlarged view of point A in the middle; Figure 3 yes Figure 1 The enlarged view of point B in the middle; Figure 4 This is a partial structural diagram of the fluid direction control valve in the hydraulic system of the wind turbine unit of the present invention. Figure 1 ; Figure 5 This is a partial structural diagram of the fluid direction control valve in the hydraulic system of the wind turbine unit of the present invention. Figure 2 ; Numbers in the figure: 1, body; 2, fixing box; 3, base; 4, upper flange; 5, lower flange; 6, fixing box flange; 7, base flange; 8, sleeve; 9, round table block; 10, liquid inlet pipe; 11, first liquid outlet pipe; 12, second liquid outlet pipe; 13, pipe joint; 14, stop valve; 15, sewage pipe; 16, valve seat; 17, valve core; 18, rotating shaft; 19, positive thread section; 20, reverse thread section; 21, slide groove; 22, upper screw sleeve; 23. Upper connecting rod; 24. Upper brush body; 25. Lower screw sleeve; 26. Lower connecting rod; 27. Lower brush body; 28. First filter screen; 29. Second filter screen; 30. Guide rod; 31. Magnet block; 32. Electromagnet; 33. Connecting plate; 34. Return spring; 35. Fixed bracket; 36. Drive motor; 37. Input member; 38. Output member; 39. Speed reducer motor; 40. Limit plate; 41. Limit groove; 42. Fixed rod; 43. Sealing plate. DETAILED DESCRIPTION
[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: A specific embodiment of the fluid direction control valve in the hydraulic system of a wind turbine generator system of the present invention is as follows: Figures 1 to 5 As shown, the housing includes a columnar body 1, a truncated cone block 9 is fixedly connected to the bottom of the body 1, and a through hole is provided at the center of the truncated cone block 9, which penetrates the upper and lower ends of the truncated cone block 9. The upper end of the body 1 has an upper flange 4, and the lower end has a lower flange 5. The housing also includes a base 3 and a fixed box 2. The fixed box 2 is a columnar structure with an open upper end and a sealed lower end. The outer diameter of the fixed box 2 is smaller than the outer diameter of the body 1, and a box cover is threadedly connected to the upper end of the fixed box 2. The lower end of the fixed box 2 is fixedly connected to the upper flange 4 through a fixed box flange 6. The base 3 is also a columnar structure, and the outer diameter of the base 3 is equal to the outer diameter of the body 1. The upper end of the base 3 is fixedly connected to the lower flange 5 through a base flange 7.
[0017] The body 1 is integrally formed with a valve seat 16 that divides the interior of the body 1 into an upper cavity and a lower cavity. The valve mouth is circular and located at the center of the valve seat 16. The body 1 is provided with a liquid inlet pipe 10 connected to the upper cavity and a first liquid outlet pipe 11 and a second liquid outlet pipe 12 connected to the lower cavity. The first liquid outlet pipe 11 and the second liquid outlet pipe 12 are located on both sides of the body 1. The diameter of the liquid inlet pipe 10 is equal to the diameter of the first liquid outlet pipe 11 and the second liquid outlet pipe 12. The axis of the first liquid outlet pipe 11 and the axis of the second liquid outlet pipe 12 are arranged in a colinear manner. The first filter screen 28 and the second filter screen 29 are respectively installed on the liquid inlet of the first liquid outlet pipe 11 and the second liquid outlet pipe 12. The body 1 is provided with a sewage pipe 15 connected to the lower end of the lower cavity. The sewage pipe 15 is close to the bottom position of the truncated cone block 9 so that the dirt in the lower cavity can be fully discharged. A control valve is installed on the sewage pipe 15. The ends of the first liquid outlet pipe 11 and the second liquid outlet pipe 12 are fixedly connected to pipe joints 13 via connecting flanges, the end of the liquid inlet pipe 10 is also fixedly connected to the pipe joint 13, and a stop valve 14 is installed between the liquid inlet pipe 10 and the pipe joint 13.
[0018] The valve core 17 is guided and installed in the upper cavity, the housing has a first driving mechanism that drives the valve core 17 to move downward to seal the valve core 17 with the valve seat 16, the upper cavity has a reset spring 34 that moves the valve core 17 upward to unseal the valve core 17 and the valve seat 16, and the lower cavity has a sleeve 8 that is rotatably installed. The housing has a second driving mechanism that drives the sleeve 8 to rotate, and the sleeve 8 is fixedly connected with a sealing plate 43 that cooperates with the inner wall of the housing to slide and seal the first liquid outlet pipe 11 or the second liquid outlet pipe 12. A rotating shaft 18 is rotatably installed at the lower end of the valve core 17, and the lower end of the rotating shaft 18 extends into the sleeve 8. The rotating shaft 18 has a forward threaded section 19 and a reverse threaded section 20. An upper cleaning brush is installed on the forward threaded section 19, and a lower cleaning brush is installed on the reverse threaded section 20. The sleeve 8 is provided with a slide groove 21 for the upper and lower cleaning brushes to move up and down. The rotating shaft 18 and the sleeve 8 are provided with a limiting structure for fixing the rotating shaft 18 with the sleeve 8 when the rotating shaft 18 moves downward. The upper end of the rotating shaft 18 extends into the interior of the valve core 17, and a drive motor 36 is fixedly connected to the interior of the valve core 17. The output shaft of the drive motor 36 can be connected to the rotating shaft 18 through a split electromagnetic coupling.
[0019] The first driving mechanism includes an electromagnet 32 and a magnet block 31. The upper end of the valve core 17 is fixedly connected to a guide rod 30, and the upper end of the guide rod 30 extends into the fixed box 2. The magnet block 31 is fixedly connected to the upper end of the guide rod 30, and the electromagnet 32 is fixedly connected to the top of the fixed box 2. A connecting plate 33 is fixedly connected to the guide rod 30, and a return spring 34 is sleeved on the guide rod 30. The upper end of the return spring 34 is fixedly connected to the connecting plate 33, and the lower end of the return spring 34 is fixedly connected to the upper side of the valve seat 16.
[0020] The valve core 17 includes a large-diameter cylindrical section, a conical section and a small-diameter cylindrical section integrally formed from top to bottom. The outer wall of the small-diameter cylindrical section is sealed with the valve mouth of the valve seat 16. The drive motor 36 is fixedly connected to the top of the large-diameter cylindrical section through a fixing frame 35. The split electromagnetic clutch includes an input member 37 and an output member 38. The input member 37 is fixedly connected to the lower end of the output shaft of the drive motor 36, and the output member 38 is fixedly connected to the upper end of the rotating shaft 18. Two fixed rods 42 arranged at intervals in an upper and lower direction are fixedly connected to the outer wall of the sleeve 8, and the ends of the fixed rods 42 are fixedly connected to the sealing plate 43.
[0021] The upper cleaning brush includes an upper screw sleeve 22, an upper connecting rod 23 and an upper brush body 24. The upper screw sleeve 22 is threadedly connected to the forward threaded section 19, and the two ends of the upper connecting rod 23 are fixedly connected to the upper screw sleeve 22 and the upper brush body 24 respectively, and the upper connecting rod 23 matches the slide groove 21; the lower cleaning brush includes a lower screw sleeve 25, a lower connecting rod 26 and a lower brush body 27. The lower screw sleeve 25 is threadedly connected under the reverse threaded section 20, and the two ends of the lower connecting rod 26 are fixedly connected to the lower screw sleeve 25 and the lower brush body 27 respectively, and the lower connecting rod 26 matches the slide groove 21.
[0022] The second driving mechanism includes a reduction motor 39, which is fixedly connected to the bottom of the base 3, and the output shaft of the reduction motor 39 extends into the base 3. The lower end of the sleeve 8 is fixedly connected with a connecting shaft, and the output shaft of the reduction motor 39 is fixedly connected to the connecting shaft through a coupling. The limiting structure includes a plurality of limiting plates 40 fixedly connected to the outer wall of the rotating shaft 18, and the plurality of limiting plates 40 are evenly spaced along the circumference of the rotating shaft 18. The limiting structure also includes a plurality of limiting grooves 41 arranged at the upper end of the sleeve 8, and the plurality of limiting grooves 41 correspond to the plurality of limiting plates 40 vertically.
[0023] The working principle of the fluid direction control valve in the hydraulic system of the wind turbine of the present invention is: the valve core 17 is in an unsealed state with the valve seat 16 under the action of the return spring 34, and the sealing plate 43 seals the first liquid outlet pipe 11. At this time, the second liquid outlet pipe 12 is connected to the lower cavity. The external fluid enters the upper cavity from the liquid inlet pipe 10, then enters the lower cavity, and flows out from the second liquid outlet pipe 12. The filter on the second liquid outlet pipe 12 filters the dirt in the liquid. The pressure sensor arranged in the lower cavity can determine whether the filter is seriously blocked by dirt. When the pressure sensor detects that the pressure exceeds the set value, the split electromagnetic coupling is energized, and the output group of the drive motor 36 is connected to the rotating shaft 18. The drive motor 36 is started, and the drive motor 36 drives the rotating shaft 18 to rotate forward and reverse periodically. During the periodic forward and reverse rotation of the rotating shaft 18, the upper cleaning brush and the lower cleaning brush can be driven to reciprocate up and down to sweep the dirt on the filter. Of course, the dirt on the filter can also be cleaned by regularly starting the drive motor 36. When it is necessary to switch from the second liquid outlet pipe 12 to the first liquid outlet pipe 11, the electromagnet 32 is energized. After the electromagnet 32 is energized, the magnetism of the magnet block 31 is opposite, and the magnet block 31 is pushed downward. The magnet block 31 drives the guide rod 30 and the valve core 17 to move downward until the valve core 17 is sealed with the valve seat 16. The rotating shaft 18 moves downward under the action of the valve core 17. The limit block on the rotating shaft 18 is inserted into the limit groove 41 of the sleeve 8, and the rotating shaft 18 is connected to the sleeve 8. Start the reduction motor 39, the reduction motor 39 drives the sleeve 8 to rotate 180°, and the sealing plate 43 fixedly connected to the sleeve 8 rotates 180°. The sealing plate 43 and the first liquid outlet pipe 11 are unsealed, and the second liquid outlet pipe 12 is sealed. The upper cleaning brush and the lower cleaning brush rotate 180° with the sleeve 8. In this process, the stop valve 14 on the sewage pipe 15 can be opened to discharge the dirt at the bottom of the lower cavity. The electromagnet 32 is powered off, the valve core 17 moves upward under the action of the return spring 34, the valve core 17 unseals the valve seat 16, the shaft 18 moves upward, the limit plate 40 on the shaft 18 is released from the limit groove 41 on the sleeve 8, and the upper cleaning brush and the lower cleaning brush on the shaft 18 move to the filter screen of the first liquid outlet pipe 11. At this time, the external fluid flows in from the liquid inlet pipe 10 and can flow out from the first liquid outlet pipe 11, completing the switching.
[0024] The fluid direction control valve in the hydraulic system of the wind turbine unit of the present invention can realize the switching of the first liquid outlet pipe and the second liquid outlet pipe by rotating the sealing plate, and the sealing plate seals the first liquid outlet pipe or the second liquid outlet pipe, so as to meet the fluid direction control requirements of the hydraulic system. By arranging a filter screen on the first liquid outlet pipe and the second liquid outlet pipe, the fluid impurities in the control valve can be filtered, and the filtered impurities can be temporarily stored at the bottom of the control valve. By arranging an upper cleaning brush and a lower cleaning brush, the filter screen can be cleaned. When the sealing plate rotates, it can drive the upper cleaning brush and the lower cleaning brush to rotate synchronously, so that the upper cleaning brush and the lower cleaning brush can move to the unsealed filter screen when the first liquid outlet pipe and the second liquid outlet pipe are switched, ensuring that the cleaning brush can be used normally after the switching. The valve core is sealed with the valve seat under the action of electromagnetic force, which improves the sealing reliability and stability of the valve core and the valve seat.
[0025] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0026] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.
Claims
1. A fluid directional control valve in a hydraulic system of a wind turbine generator set, characterized in that: The invention comprises a shell, wherein a valve seat is provided in the shell to divide the interior of the shell into an upper cavity and a lower cavity, a liquid inlet pipe connected to the upper cavity and a first liquid outlet pipe and a second liquid outlet pipe connected to the lower cavity are provided on the shell, a first filter screen and a second filter screen are provided on the liquid inlet of the first liquid outlet pipe and the second liquid outlet pipe respectively, a sewage pipe connected to the lower end of the lower cavity is provided on the shell, a valve core is guidedly installed in the upper cavity, a first driving mechanism for driving the valve core to move downward so that the valve core and the valve seat are sealed is provided on the shell, a reset spring for driving the valve core to move upward so that the valve core and the valve seat are unsealed is provided in the upper cavity, a sleeve is rotatably installed in the lower cavity, and a second driving mechanism for driving the sleeve to rotate is provided on the shell. The invention relates to a driving mechanism, wherein a sealing plate is fixedly connected to the sleeve and cooperates with the inner wall of the shell for sliding sealing and sealing the first liquid outlet pipe or the second liquid outlet pipe. A rotating shaft is rotatably installed at the lower end of the valve core, and the lower end of the rotating shaft extends into the sleeve. A forward threaded section and a reverse threaded section are provided on the rotating shaft. An upper cleaning brush is provided on the forward threaded section, and a lower cleaning brush is provided on the reverse threaded section. A sliding groove for the upper and lower cleaning brushes to move up and down is provided on the sleeve. A limiting structure is provided on the rotating shaft and the sleeve for fixing the rotating shaft with the sleeve when the rotating shaft moves downward. The upper end of the rotating shaft extends into the interior of the valve core. A driving motor is provided inside the valve core, and the output shaft of the driving motor can be connected to the rotating shaft through a split electromagnetic coupling.
2. A fluid directional control valve in a hydraulic system of a wind turbine according to claim 1, characterized in that: The shell includes a columnar body, a truncated cone block is provided at the bottom of the body, the sleeve is rotatably mounted on the truncated cone block through a bearing, an upper flange is provided at the upper end of the body, and a lower flange is provided at the lower end, the shell includes a base and a fixing box, the fixing box is fixedly connected to the upper flange through the fixing box flange, and the base is fixedly connected to the lower flange through the base flange.
3. A fluid directional control valve in a hydraulic system of a wind turbine according to claim 2, characterized in that: The first driving mechanism includes an electromagnet and a magnet block. The upper end of the valve core is fixedly connected to a guide rod, the upper end of the guide rod extends into a fixed box, the magnet block is fixedly connected to the upper end of the guide rod, and the electromagnet is fixedly connected to the top of the fixed box.
4. A fluid directional control valve in a hydraulic system of a wind turbine according to claim 3, characterized in that: A connecting plate is fixedly connected to the guide rod, the return spring is sleeved on the guide rod, the upper end of the return spring is fixedly connected to the connecting plate, and the lower end of the return spring is fixedly connected to the upper side of the valve seat.
5. A fluid directional control valve in a hydraulic system of a wind turbine according to claim 1, characterized in that: The valve core includes a large-diameter cylindrical section, a conical section and a small-diameter cylindrical section that are integrally formed from top to bottom. The outer wall of the small-diameter cylindrical section is sealed with the valve mouth of the valve seat. The drive motor is fixedly connected to the top of the large-diameter cylindrical section through a fixing frame. The split electromagnetic clutch includes an input part and an output part. The input part is fixedly connected to the lower end of the output shaft of the drive motor, and the output part is fixedly connected to the upper end of the rotating shaft.
6. A fluid directional control valve in a hydraulic system of a wind turbine according to claim 1, characterized in that: Two fixing rods spaced apart from each other are arranged on the outer wall of the sleeve, and the ends of the fixing rods are fixedly connected to the sealing plate.
7. A fluid directional control valve in a hydraulic system of a wind turbine according to claim 1, characterized in that: The upper cleaning brush includes an upper screw sleeve, an upper connecting rod and an upper brush body, the upper screw sleeve is threadedly connected to the forward thread segment, the two ends of the upper connecting rod are respectively fixedly connected to the upper screw sleeve and the upper brush body, and the upper connecting rod matches the slide groove; the lower cleaning brush includes a lower screw sleeve, a lower connecting rod and a lower brush body, the lower screw sleeve is threadedly connected under the reverse thread segment, the two ends of the lower connecting rod are respectively fixedly connected to the lower screw sleeve and the lower brush body, and the lower connecting rod matches the slide groove.
8. A fluid directional control valve in a hydraulic system of a wind turbine according to claim 2, characterized in that: The second driving mechanism includes a reduction motor, which is fixedly connected to the bottom of the base. The output shaft of the reduction motor extends into the base. The lower end of the sleeve is fixedly connected with a connecting shaft. The output shaft of the reduction motor and the connecting shaft are fixedly connected via a coupling.
9. A fluid directional control valve in a hydraulic system of a wind turbine according to claim 1, characterized in that: The limiting structure includes a plurality of limiting plates fixedly connected to the outer wall of the rotating shaft, and the plurality of limiting plates are evenly spaced along the circumference of the rotating shaft. The limiting structure also includes a plurality of limiting grooves arranged at the upper end of the sleeve, and the plurality of limiting grooves correspond to the plurality of limiting plates vertically one by one.