Wind driven generator and gear box thereof

Abstract

The gearbox comprises a machine body, a supporting rod is installed at the bottom of the machine body, a rotating cover is rotationally connected to the side end of the machine body, fan blades are installed in the rotating cover, a partition plate is installed at the bottom of the inner wall of the machine body, and a driving motor is installed at the upper end of the partition plate; a transmission shaft is installed at the output end of the driving motor, a gearbox is installed in the middle of the transmission shaft, and a ventilation pipe is connected between the driving motor and the inner wall of the machine body. Through the arrangement of the mounting frame, the gear ring, the extrusion ring, the scraping plate, the closing plate, the electric push rod A and the cleaning adsorption mechanism, scrap iron on the surface of the filter element can be adsorbed, the problem that the filter element is blocked by the scrap iron is avoided, and therefore circulation of engine oil in the gearbox of the wind driven generator can be ensured; the problem of overheating of equipment caused by temperature rise due to unsmooth flowing of internal engine oil can be avoided, and insufficient lubrication and overheating of the interior of the gearbox of the wind driven generator can be prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, in particular to a wind power generator and a gear box thereof. Background Art

[0002] Wind power generation is a technology that converts wind energy into electrical energy. Wind turbines capture wind energy through wind rotors, causing the blades to rotate and drive the generator to generate electricity. Lubricating the inside of the wind turbine gearbox can reduce friction and wear between gears and bearings, but iron filings generated when gears and bearings wear will fall into the engine oil. In wind farms, the hydraulic system undertakes important tasks such as transmission, control and protection. Impurities in the engine oil will have a serious impact on the normal operation of the hydraulic system and even cause equipment failure. The role of the filter element is to filter out these impurities and keep the oil clean. However, as the use time increases, the filter element will gradually become clogged and the filtering effect will decrease, and it needs to be replaced regularly.

[0003] However, the existing wind turbines are located at high places, and the filter on the surface of the gearbox is installed in a tricky position, which makes it inconvenient for the staff to replace the internal filter element, making it more difficult to replace and maintain the filter element, which may cause the staff to spend more time on the operation. When filtering inside the wind turbine gearbox, the filter element inside the filter will filter the iron filings inside the oil. Long-term filtration will cause the iron filings to block the filter element, which will in turn affect the circulation of the internal oil. Insufficient internal lubrication and overheating will accelerate the wear of gears and bearings, shortening the service life of the equipment. In view of the above problems, it is urgent to carry out innovative design based on the original wind turbine. Summary of the invention

[0004] The object of the present invention is to provide a wind turbine and its gearbox to solve the problem that the gearbox of the existing wind turbine is at a high place and the position of the filter is tricky, which increases the difficulty of replacing and maintaining the filter element and may cause the staff to spend more time on the operation. The filter element inside the filter will filter the iron filings inside the engine oil. Long-term filtration will cause the iron filings to block the filter element. The technical solution of the present invention aims at the technical problem that the existing technical solution is too single and provides a solution that is significantly different from the existing technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: In a first aspect, a wind turbine is provided, comprising a body, a support rod being installed at the bottom of the body, a rotating cover being rotatably connected to the side end of the body, fan blades being installed inside the rotating cover, a partition being installed at the bottom of the inner wall of the body, a drive motor being installed at the upper end of the partition, a transmission shaft being installed at the output end of the drive motor, a gear box being installed in the middle of the transmission shaft, and a ventilation pipe being connected between the drive motor and the inner wall of the body.

[0006] In a second aspect, the present invention provides a wind turbine gearbox, comprising a casing, an oil filling pipe is installed at the upper end of the casing, an oil outlet pipe is installed at the lower end of the casing, a filter tube is installed at the side end of the casing, a hose is connected between the bottom end of the filter tube and the oil outlet pipe, a hose is connected between the top end of the filter tube and the oil filling pipe, an oil pump is installed at the side end of the filter tube, a filter element is installed inside the filter tube, a mounting frame is installed inside the filter tube, and the mounting frame is rotatably connected to the inside of the filter tube, a gear ring is installed at the connecting pipe inside the filter tube, an extrusion ring is installed on the inner wall of the filter tube, grooves are provided above and below the mounting frame, the extrusion ring is slidably connected to the groove, a scraper is installed inside the mounting frame, a closing plate is installed on the surface of the internal cavity of the mounting frame, an electric push rod A is installed at the side end of the mounting frame, and the protruding end of the electric push rod A is connected to the closing plate, A cleaning adsorption mechanism, which is arranged in the inner cavity of the mounting frame and is used to adsorb iron filings on the surface of the filter element to prevent the filter element from being blocked; A cleaning and collecting mechanism is provided in the internal cavity of the mounting frame and on the surface of the filter tube, and is used for collecting adsorbed iron filings.

[0007] Preferably, the scraper surface is a curved surface and fits the inner wall of the filter tube; the scraper is in three groups and the side ends are chamfered.

[0008] Preferably, the extrusion ring is in an unclosed circular ring state, and an unclosed end of the extrusion ring is provided with an inwardly inclined surface.

[0009] Preferably, the cleaning adsorption mechanism includes a connecting plate that slides in the upper and lower ends of the internal cavity of the mounting frame, the bottom of the connecting plate is rotatably connected to a rotating rod, the surface of the rotating rod is sleeved with a magnetic rod, one end of the connecting plate is installed with a spring, the other end of the spring is connected to one end of the inner wall of the sliding groove, and a gear is installed on the surface of the rotating rod.

[0010] Preferably, an arc-shaped groove is provided on the surface of the mounting frame, the extrusion ring rotates in the arc-shaped groove, and a rounded corner is provided on the end of the connecting plate.

[0011] Preferably, when the connecting plate slides into the sliding groove, the gear is meshed with the gear ring.

[0012] Preferably, the cleaning and collecting mechanism includes a mounting plate installed on the surface of the rotating rod, an electric push rod B is installed inside the mounting plate, a scraper ring is installed on the protruding end of the electric push rod B, a position sensor is installed on the side wall of the internal cavity of the mounting frame, a square notch is opened on the surface of the filter tube, a collection table A slides inside the square notch, and the bottom of the collection table A is rotatably connected to the collection table B.

[0013] Preferably, the inner wall diameter of the scraper ring matches the diameter of the magnetic rod, the collecting table A is designed in a "U" shape, and a torsion spring is installed inside the collecting table B; the collecting table A and the collecting table B are combined into a "mouth" shape design.

[0014] Preferably, a controller is installed inside the filter tube, and when the oil pump stops working, no oil is injected into the filter tube. At this time, the controller sends a first control information, and the first control information drives the electric push rod A to open the closing plate. Then the controller drives the motor to drive the mounting frame to rotate, so that the magnetic rod extends and rotates, and then absorbs iron filings on the surface of the filter element. When the magnetic rod is reset, the position sensor transmits information to the controller. At this time, the controller sends a second control information to drive the electric push rod B to drive the scraper ring to collect iron filings on the surface of the magnetic rod, and drives the electric push rod A to close the closing plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can adsorb iron filings on the surface of the filter element by means of the mounting frame, gear ring, extrusion ring, scraper, closing plate, electric push rod A and cleaning adsorption mechanism, thereby preventing the filter element from being blocked by iron filings and ensuring the fluidity of the oil inside the gearbox of the wind turbine generator. This can not only prevent the problem of poor internal oil flow leading to temperature rise and thus causing overheating of the equipment, but also prevent the problem of insufficient lubrication and overheating inside the gearbox of the wind turbine generator, accelerate the wear of gears and bearings, and shorten the service life of the equipment.

[0016] 2. The cleaning and collecting mechanism provided in the present invention can centrally clean the iron filings adsorbed on the surface of the magnetic rod, thereby ensuring that the magnetic rod has the ability to continuously and efficiently adsorb and that the equipment is always in the best working condition. It can not only reduce the frequency of internal filter element replacement by staff, but also directly clean the centrally collected iron filings from the outside without the need to disassemble the filter tube, thereby reducing the work intensity and workload of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the process of the present invention; Figure 2 Schematic diagram of the structure of the present invention Figure 3 Schematic diagram of the cross-section structure of a wind turbine Figure 4 This is a schematic diagram of the wind turbine gearbox structure; Figure 5 This is a schematic diagram of the filter tube and oil pump structure of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the filter tube of the present invention; Figure 7 for Figure 6 The enlarged structural diagram at A in the middle; Figure 8 This is a schematic diagram of the filter tube explosion structure; Fig. 9 It is a schematic diagram of the upper end structure of the mounting frame section; Fig.10 for Fig. 9 The enlarged structural diagram at B in the middle; Fig.11 It is a schematic diagram of the structure of the lower end of the mounting frame section; Fig.12 for Fig.11 The enlarged structural diagram at C in the middle; Fig.13 This is a schematic diagram of the explosion structure of the mounting frame; Fig.14 Schematic diagram of the scraper structure.

[0018] In the figure: 1. box body; 2. oil filling pipe; 3. oil outlet pipe; 4. filter pipe; 5. oil pump; 6. filter element; 7. mounting frame; 8. gear ring; 9. extrusion ring; 10. scraper; 11. closing plate; 12. electric push rod A; 13. cleaning adsorption mechanism; 131. connecting plate; 132. rotating rod; 133. magnetic rod; 134. spring; 135. gear; 14. cleaning and collecting mechanism; 141. mounting plate; 142. electric push rod B; 143. scraper ring; 144. position sensor; 145. collecting table A; 146. collecting table B; 201. machine body; 202. support rod; 203. rotating cover; 204. fan blade; 205. partition; 206. transmission shaft; 207. ventilation pipe. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-14 The present invention provides a technical solution: a wind turbine and a gearbox thereof, It includes a body 201, a support rod 202 is installed at the bottom of the body 201, a rotating cover 203 is rotatably connected to the side end of the body 201, a fan blade 204 is installed inside the rotating cover 203, a partition is installed at the bottom of the inner wall of the body 201, a driving motor is installed at the upper end of the partition 205, a transmission shaft 206 is installed at the output end of the driving motor, a gear box is installed in the middle of the transmission shaft 206, and a ventilation pipe 207 is connected between the driving motor and the inner wall of the body 201; It comprises a box body 1, an oil filling pipe 2 is installed at the upper end of the box body 1, an oil outlet pipe 3 is installed at the lower end of the box body 1, a filter tube 4 is installed at the side end of the box body 1, a hose is connected between the bottom end of the filter tube 4 and the oil outlet pipe 3, a hose is connected between the top end of the filter tube 4 and the oil filling pipe 2, an oil pump 5 is installed at the side end of the filter tube 4, a filter element 6 is installed inside the filter tube 4, a mounting frame 7 is installed inside the filter tube 4, and the mounting frame 7 is rotatably connected inside the filter tube 4, a gear ring 8 is installed at the connecting pipe inside the filter tube 4, an extrusion ring 9 is installed on the inner wall of the filter tube 4, grooves are provided above and below the mounting frame 7, the extrusion ring 9 is slidably connected to the groove, a scraper 10 is installed inside the mounting frame 7, a closing plate 11 is installed on the surface of the internal cavity of the mounting frame 7, an electric push rod A12 is installed at the side end of the mounting frame 7, and the protruding end of the electric push rod A12 is connected to the closing plate 11, A cleaning adsorption mechanism 13, which is disposed in the inner cavity of the mounting frame 7, and is used to adsorb iron filings on the surface of the filter element 6 to prevent the filter element 6 from being blocked; A cleaning and collecting mechanism 14 is provided in the inner cavity of the mounting frame 7 and on the surface of the filter tube 4, and is used to collect adsorbed iron filings; During operation, the filter element 6 inside the filter will filter the iron filings inside the oil. Long-term filtering will cause the iron filings to block the filter element 6. This embodiment of the present invention can solve the above problems. The specific implementation method is as follows. When the filter tube 4 inside the wind power generation gear box 135 is blocked, the oil pump 5 is first closed to prevent the internal oil from continuing to circulate. At this time, the closing plate 11 is opened by the electric push rod A12, and then the mounting frame 7 is driven to rotate by the motor. When the mounting frame 7 rotates, the extrusion ring 9 will squeeze the connecting plate 131, so that the magnetic rod 133 extends out. At this time, the rotating rod 132 will leave the position sensor 144, and the electric push rod B142 will drive the scraper ring 143 to rise, and the magnetic rod 1 The surface of the filter element 6 will be attached to the surface of the filter element 6, so that the surface of the filter element 6 can be cleaned. The magnetic rod 133 is in the internal cavity of the mounting frame 7 at this time, and the closing plate 11 will close the cavity. At this time, the magnetic rod 133 is not in contact with the filter element 6, and no iron filings are generated on the surface of the magnetic rod, and the gear 135 is above the magnetic rod 133. When the magnetic rod 133 is extended, the closing plate 11 opens, and then the scraper ring 143 moves upward on the surface of the magnetic rod, and the scraper ring stays at the center of the distance between the gear 135 and the magnetic rod 133. Then the gear 135 will mesh with the gear ring 8, and when the magnetic rod 133 rotates around the filter element 6, it will rotate, thereby avoiding the adsorption of more iron filings in the local area of ​​the magnetic rod 133; When the mounting frame 7 rotates to reset, the connecting plate 131 will not be subjected to the pressure of the extrusion ring 9, so that the spring 134 will drive the connecting plate 131 to automatically reset. At this time, the position sensor 144 senses the position of the rotating rod 132 and drives the electric push rod B142 to drive the scraper ring 143 to move downward, and can drive the electric push rod A12 to drive the closing plate 11 to close. When the scraper ring 143 moves downward, the iron filings will fall into the collecting table A145 and the collecting table B146. The collecting table A145 can be disassembled by bolts, and then the inside of the collecting table A145 and the collecting table B146 can be cleaned; As an embodiment of the present invention, the surface of the scraper 10 is an arc surface and fits the inner wall of the filter tube 4; the number of the scraper 10 is three groups and the side ends are provided with chamfers, the arc surface of the scraper 10 fits the inside of the filter tube 4, and the chamfers on the scraper surface can reduce the resistance during cleaning. When the mounting frame 7 rotates, the scraper 10 can clean the inner wall of the filter tube 4, and the iron filings on the inner wall surface will fall into the bottom of the filter tube 4. When the oil passes through the inside of the filter tube 4 again, the oil will adsorb the iron filings at the bottom of the filter tube 4 to the surface of the filter element again; As an embodiment of the present invention, the extrusion ring 9 is in an unclosed circular ring state, and the unclosed end of the extrusion ring 9 is provided with an inward inclined surface. When the mounting frame rotates, the design of the inclined surface of the extrusion ring 9 can more conveniently squeeze the connecting plate 131. The unclosed circular ring is set up when the mounting frame 7 rotates to the unclosed area, at which time the magnetic rod 133 can be reset; As an embodiment of the present invention, the cleaning adsorption mechanism 13 includes a connecting plate 131 that slides in the upper and lower ends of the internal cavity of the mounting frame 7, and the bottom of the connecting plate 131 is rotatably connected to a rotating rod 132, and a magnetic rod 133 is sleeved on the surface of the rotating rod 132. A spring 134 is installed at one end of the connecting plate 131, and the other end of the spring 134 is connected to one end of the inner wall of the sliding groove. A gear 135 is installed on the surface of the rotating rod 132. The magnetic rod 133 can adsorb iron filings on the surface of the filter element 6 to prevent the iron filings from clogging the filter element 6, so as to ensure the fluidity of the oil inside the gear box 135 of the wind turbine generator; As an embodiment of the present invention, an arc-shaped groove is provided on the surface of the mounting frame 7, and the extrusion ring 9 rotates in the arc-shaped groove. A rounded corner is provided at the end of the connecting plate 131. The rounded corner design at the end of the connecting plate 131 can facilitate the extrusion ring 9 to be extruded when the end of the connecting plate 131 contacts the inclined surface of the extrusion ring 9. As an embodiment of the present invention, when the connecting plate 131 slides into the slide groove, the gear 135 is meshed with the gear ring 8. When the connecting plate 131 slides into the slide groove, when the magnetic rod 133 contacts the surface of the filter element 6, the gear 135 and the gear ring 8 are meshed with each other, and when the mounting frame 7 rotates, the rotating rod 132 is driven to rotate. As an embodiment of the present invention, the cleaning and collecting mechanism 14 includes a mounting plate 141 mounted on the surface of the rotating rod 132, an electric push rod B142 is mounted inside the mounting plate 141, a scraper ring 143 is mounted on the extended end of the electric push rod B142, a position sensor 144 is mounted on the side wall of the inner cavity of the mounting frame 7, a square notch is opened on the surface of the filter tube 4, a collecting table A145 is slid inside the square notch, and a collecting table B146 is rotatably connected to the bottom of the collecting table A145, and the cleaning and collecting mechanism 14 can centrally clean the iron filings adsorbed on the surface of the magnetic rod 133, and can also directly clean the centrally collected iron filings from the outside without the need to disassemble the filter tube 4; As an embodiment of the present invention, the inner wall diameter of the scraper ring 143 is consistent with the diameter of the magnetic rod 133, the collecting table A145 is of "U" shape design, and a torsion spring is installed inside the collecting table B146; the collecting table A145 and the collecting table B146 are combined into a "mouth" design, and the "mouth" design of the collecting table B146 and the collecting table A145 can collect the iron filings on the surface of the magnetic rod 133 to prevent them from falling randomly. When the collecting table A145 is disassembled, the torsion spring design of the collecting table B146 prevents the rotating rod 132 from affecting it, and the collecting table B146 will automatically reset when the extrusion force is lost; A controller is installed inside the filter tube 4. When the oil pump 5 stops working, no oil is injected into the filter tube 4. At this time, the controller sends out a first control message, and the first control message drives the electric push rod A12 to open the closing plate 11. Then the controller drives the motor to drive the mounting frame 7 to rotate, so that the magnetic rod 133 extends and rotates, and then absorbs the iron filings on the surface of the filter element 6. When the magnetic rod 133 is reset, the position sensor transmits information to the controller. At this time, the controller sends out a second control message to drive the electric push rod B142 to drive the scraper ring 143 to collect the iron filings on the surface of the magnetic rod 133, and drives the electric push rod A12 to close the closing plate 11.

[0021] Working principle: when the filter tube 4 inside the wind power generation gear 135 box is blocked, the oil pump 5 is first closed to prevent the internal oil from continuing to circulate. At this time, the closing plate 11 is opened by the electric push rod A12, and then the mounting frame 7 is driven to rotate by the motor. When the mounting frame 7 rotates, the extrusion ring 9 will squeeze the connecting plate 131, so that the magnetic rod 133 extends out. At this time, the rotating rod 132 will leave the position sensor 144, and the electric push rod B142 will drive the scraper ring 143 to rise, and the surface of the magnetic rod 133 will fit on the surface of the filter element 6, so as to clean the surface of the filter element 6. When the magnetic rod 133 is extended, the gear 135 will mesh with the gear ring 8, and the magnetic rod 133 will rotate when it rotates around the filter element 6, thereby avoiding the problem of excessive local adsorption of the magnetic rod 133 affecting the adsorption effect; When the mounting frame 7 rotates to reset, the connecting plate 131 will not be subjected to the pressure of the extrusion ring 9, so that the spring 134 will drive the connecting plate 131 to automatically reset. At this time, the position sensor 144 senses the position of the rotating rod 132 and drives the electric push rod B142 to drive the scraper ring 143 to move downward, and can drive the electric push rod A12 to drive the closing plate 11 to close. When the scraper ring 143 moves downward, the iron filings will fall into the collecting table A145 and the collecting table B146. The collecting table A145 can be disassembled by bolts, and then the inside of the collecting table A145 and the collecting table B146 can be cleaned.

[0022] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. In the description of the present invention, unless otherwise specified, "multiple" means two or more; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wind turbine generator, comprising a body (201), characterized in that: A support rod (202) is installed at the bottom of the machine body (201); a rotating cover (203) is rotatably connected to the side end of the machine body (201); a fan blade (204) is installed inside the rotating cover (203); a partition (205) is installed at the bottom of the inner wall of the machine body (201); a drive motor is installed at the upper end of the partition (205); a transmission shaft (206) is installed at the output end of the drive motor; a gear box is installed in the middle of the transmission shaft (206); and a ventilation pipe (207) is connected between the drive motor and the inner wall of the machine body (201).

2. A wind turbine gearbox, suitable for a wind turbine as claimed in claim 1, characterized in that: The invention comprises a box body (1), an oil filling pipe (2) is installed at the upper end of the box body (1), an oil outlet pipe (3) is installed at the lower end of the box body (1), a filter pipe (4) is installed at the side end of the box body (1), a hose is connected between the bottom end of the filter pipe (4) and the oil outlet pipe (3), a hose is connected between the top end of the filter pipe (4) and the oil filling pipe (2), an oil pump (5) is installed at the side end of the filter pipe (4), a filter element (6) is installed inside the filter pipe (4), and a mounting frame (7) is installed inside the filter pipe (4), and the mounting frame (7) is rotatably connected to the filter pipe (4). Inside the filter tube (4), a gear ring (8) is installed at the internal connection pipe of the filter tube (4), an extrusion ring (9) is installed on the inner wall of the filter tube (4), grooves are provided on the top and bottom of the mounting frame (7), the extrusion ring (9) is slidably connected to the groove, a scraper (10) is installed inside the mounting frame (7), a closing plate (11) is installed on the surface of the internal cavity of the mounting frame (7), an electric push rod A (12) is installed on the side end of the mounting frame (7), and the protruding end of the electric push rod A (12) is connected to the closing plate (11); A cleaning adsorption mechanism (13), the cleaning adsorption mechanism (13) being arranged in an internal cavity of the mounting frame (7), the cleaning adsorption mechanism (13) being used to adsorb iron filings on the surface of the filter element (6) to prevent the filter element (6) from being blocked; A cleaning and collecting mechanism (14) is arranged in the internal cavity of the mounting frame (7) and on the surface of the filter tube (4), and the cleaning and collecting mechanism (14) is used to collect adsorbed iron filings.

3. A wind turbine gearbox according to claim 2, characterized in that: The scraper (10) has a curved surface and fits against the inner wall of the filter tube (4); the scraper (10) is provided in three groups and has chamfered side ends.

4. A wind turbine gearbox according to claim 3, characterized in that: The extrusion ring (9) is in an unclosed circular ring state, and an unclosed end of the extrusion ring (9) is provided with an inwardly inclined surface.

5. A wind turbine gearbox according to claim 4, characterized in that: The cleaning adsorption mechanism (13) comprises a connecting plate (131) which is limitedly slidable in the slide grooves at the upper and lower ends of the internal cavity of the mounting frame (7); a rotating rod (132) is rotatably connected to the bottom of the connecting plate (131); a magnetic rod (133) is sleeved on the surface of the rotating rod (132); a spring (134) is installed at one end of the connecting plate (131); the other end of the spring (134) is connected to one end of the inner wall of the slide groove; and a gear (135) is installed on the surface of the rotating rod (132).

6. A wind turbine gearbox according to claim 5, characterized in that: An arc-shaped groove is provided on the surface of the mounting frame (7), the extrusion ring (9) rotates in the arc-shaped groove, and a rounded corner is provided on the end of the connecting plate (131).

7. A wind turbine gearbox according to claim 6, characterized in that: When the connecting plate (131) slides into the sliding groove, the gear (135) meshes with the gear ring (8).

8. A wind turbine gearbox according to claim 7, characterized in that: The cleaning and collecting mechanism (14) comprises a mounting plate (141) mounted on the surface of a rotating rod (132), an electric push rod B (142) being mounted inside the mounting plate (141), a scraper ring (143) being mounted on the protruding end of the electric push rod B (142), a position sensor (144) being mounted on the side wall of the internal cavity of the mounting frame (7), a square notch being formed on the surface of the filter tube (4), a collecting platform A (145) being slidably disposed inside the square notch, and a collecting platform B (146) being rotatably connected to the bottom of the collecting platform A (145).

9. A wind turbine gearbox according to claim 8, characterized in that: The inner wall diameter of the scraper ring (143) matches the diameter of the magnetic rod (133); the collecting table A (145) is designed in a "U" shape, and a torsion spring is installed inside the collecting table B (146); the collection table A and the collection table B are combined into a "mouth" shape design.

10. A wind turbine gearbox according to claim 9, characterized in that: A controller is installed inside the filter tube (4). When the oil pump (5) stops working, no oil is injected into the filter tube (4). At this time, the controller sends a first control message. The first control message drives the electric push rod A (12) to open the closing plate (11). Then, the controller drives the motor to drive the mounting frame (7) to rotate, so that the magnetic rod (133) extends and rotates, thereby adsorbing iron filings on the surface of the filter element (6). When the magnetic rod (133) is reset, the position sensor transmits information to the controller. At this time, the controller sends a second control message to drive the electric push rod B (142) to drive the scraper ring (143) to collect iron filings on the surface of the magnetic rod (133), and drives the electric push rod A (12) to close the closing plate (11).

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