A double gear lubricating pump for a wind turbine gear box

Abstract

The application relates to the technical field of lubricating systems of wind power generation equipment, in particular to a double gear lubricating pump for a wind power gear box, which comprises a shell, a sealing cover connected to the rear end of the shell through screws, a conveying cavity formed in the shell, a first conveying gear and a second conveying gear movably installed in the conveying cavity, the first conveying gear and the second conveying gear being mutually meshed, a motor installed at the front end of the shell, an output end of the motor penetrating through the front end of the shell and being fixed with the first conveying gear, a sealing groove formed at the front end of the shell, and a protective cover arranged in the sealing groove and located outside the motor, the motor being protected under the action of the protective cover, the motor being not prone to damage during use, so that the working efficiency of the wind power generator set is ensured, the motor not being prone to damage, so that the motor does not need to be frequently overhauled and maintained, and the defects existing in the prior art are solved.

Description

Technical Field

[0001] This invention relates to the field of lubrication system technology for wind power generation equipment, specifically a double gear lubrication pump for wind turbine gearboxes. Background Technology

[0002] The wind turbine gearbox is a core component of a wind turbine generator set, used to convert the low speed of the wind turbine rotor to the high speed required by the generator, achieving efficient transmission of mechanical energy. It typically employs a planetary gear + parallel shaft combination structure, and must withstand complex conditions such as wind load impacts, varying stresses, and extreme temperature differences, requiring high load-bearing capacity, fatigue resistance, and long service life. Key technologies involve gear precision machining, bearing selection, lubrication and cooling systems, and sealing design, directly impacting the reliability of the unit.

[0003] Currently, the lubrication and cooling system of wind turbine gearboxes mainly relies on gear lubrication pumps. These pumps are often driven by motors, and since wind turbines are installed in remote areas at high altitudes, the motors of existing gear lubrication pumps lack adequate protective structures, leaving them directly exposed to the outside environment. This makes the motors prone to damage and inconvenient to inspect and maintain, severely impacting the working efficiency of wind turbines and presenting significant drawbacks.

[0004] To address this, a double-gear lubrication pump for wind turbine gearboxes is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a double gear lubrication pump for wind turbine gearboxes.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A double gear lubrication pump for wind turbine gearboxes, comprising: The outer casing and the sealing cap attached to the rear end of the outer casing using screws; The outer shell has a conveying cavity inside, and a first conveying gear and a second conveying gear are movably installed inside the conveying cavity, and the first conveying gear and the second conveying gear mesh with each other. The top and bottom of the outer casing are respectively equipped with inlet and outlet pipes; A motor is installed at the front end of the housing; The output end of the motor passes through the front end of the housing and is fixed to the first conveying gear; The front end of the outer casing has a sealing groove, and a protective cover located outside the motor is installed inside the sealing groove.

[0007] Preferably, a fixing block is fixed to the front end of the outer shell, a fixing groove is formed at the front end of the fixing block, a fixing strip is fixed to the outer wall of the protective cover inside the fixing groove, a movable cavity is formed inside the fixing block, a movable block is movably disposed in the movable cavity, a movable hole is formed on one side of the inner wall of the movable cavity, a fixing hole is formed on the outer wall of the fixing strip, and a fixing post is fixed to one end of the movable block, which is movably disposed inside the movable hole and located inside the fixing hole.

[0008] Preferably, a threaded hole is provided on the inner wall of the other side of the movable cavity, and a threaded rod is threadedly connected to the threaded hole. A knob is fixed at one end of the threaded rod, and the other end of the threaded rod is rotatably connected to the movable block.

[0009] Preferably, the outer wall of the protective cover is equipped with heat dissipation fins.

[0010] Preferably, a heat-conducting ring is installed on the outer wall of the motor, a connecting groove is provided on the outer wall of the heat-conducting ring, an installation groove is provided at the bottom of the connecting groove, a heat-conducting telescopic rod is fixed at the bottom of the installation groove, a heat-conducting abutment strip is fixed at the top of the heat-conducting telescopic rod, and a heat-conducting spring is provided on the outside of the heat-conducting telescopic rod. The two ends of the heat-conducting spring are respectively fixed to the bottom of the installation groove and the bottom of the heat-conducting abutment strip.

[0011] Preferably, a heat-conducting strip is fixed to the inner wall of the protective cover and located inside the connecting groove, with the bottom of the heat-conducting strip contacting the top of the heat-conducting abutment strip.

[0012] Preferably, a connecting pipe is provided inside the outlet pipe, and a filter plate is installed inside the connecting pipe.

[0013] Preferably, the inner wall of the outlet pipe is provided with a threaded groove, the outer wall of the connecting pipe is provided with a connecting thread, the connecting pipe is threadedly connected to the inside of the outlet pipe through the connecting thread engaging with the threaded groove, and a fixing ring and a rotating shaft are fixed on the outer wall of the outlet pipe.

[0014] Preferably, the outer wall of the fixing ring is provided with a snap-fit ​​groove, an L-shaped strip is snapped into the snap-fit ​​groove, and a U-shaped frame is fixed to the top of the L-shaped strip, the U-shaped frame being located outside the knob.

[0015] Preferably, a connecting block is fixed to the outer wall of the outlet pipe, a connecting strip is provided on the outside of the connecting block, one end of the connecting strip is fixed to an L-shaped strip, a first locking hole and a second locking hole are respectively opened on the outer walls of both sides of the connecting strip, a third locking hole and a fourth locking hole are respectively opened on the inner walls of both sides of the connecting block, a fixed telescopic rod is provided inside the connecting block, a first connecting plate and a second connecting plate are respectively fixed at both ends of the fixed telescopic rod, a first locking piece and a second locking piece are respectively fixed at the ends of the first connecting plate and the second connecting plate that are far apart from each other, the first locking piece and the second locking piece are respectively located inside the first locking hole and the third locking hole, the second locking hole and the fourth locking hole, and a fixed spring is provided on the outside of the fixed telescopic rod, the two ends of the fixed spring are respectively fixed to the first connecting plate and the second connecting plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The protective cover is placed inside the sealing groove. At this time, the fixing strip on the outside of the protective cover will be inserted into the fixing groove of the fixing block. Then, the movable block can be moved in the movable cavity by using the knob. When the movable block moves, it will drive the fixing column to move in the movable hole. When the fixing column is in the fixing hole, the protective cover can be fixed inside the sealing groove. Since the protective cover is located outside the motor, it can protect the motor and make it less likely to be damaged during use, thereby ensuring the working efficiency of the wind turbine generator set. Since the motor is not easily damaged, it does not need to be frequently inspected and maintained, thus solving the defects existing in the prior art. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural schematic diagram of the present invention; Figure 3 For the present invention Figure 2 Enlarged diagram of A in the middle; Figure 4 This is a schematic diagram of the internal structure of the outer shell in this invention; Figure 5 This is a schematic diagram of the internal structure of the fixing block in this invention; Figure 6 This is a schematic diagram of the internal structure of the mounting slot in this invention; Figure 7 This is a schematic diagram of the U-shaped frame structure in this invention; Figure 8 This is a schematic diagram of the fixed telescopic rod and fixed spring structure in this invention; Figure 9 This is a schematic diagram of the connecting pipe structure in this invention; Figure 10 This is a schematic diagram of the internal structure of the outlet pipe in this invention.

[0018] In the diagram: 1. Outer shell; 2. Sealing cap; 3. Screw; 4. Conveying chamber; 5. First conveying gear; 6. Second conveying gear; 7. Motor; 8. Inlet pipe; 9. Outlet pipe; 10. Sealing groove; 11. Protective cover; 12. Fixing block; 13. Fixing groove; 14. Fixing strip; 15. Movable chamber; 16. Movable block; 17. Movable hole; 18. Fixing hole; 19. Fixing post; 20. Threaded hole; 21. Threaded rod; 22. Knob; 23. Heat dissipation fins; 24. Heat-conducting ring; 25. 26. Connecting groove; 27. Mounting groove; 28. Thermally conductive telescopic rod; 29. ​​Thermally conductive abutment strip; 30. Thermally conductive spring; 31. Thermally conductive strip; 32. Threaded groove; 33. Connecting pipe; 34. Filter plate; 35. Fixing ring; 36. Rotating shaft; 37. Snap-fit ​​groove; 38. L-shaped strip; 39. U-shaped frame; 40. Connecting block; 41. Connecting strip; 42. Fixed telescopic rod; 43. First connecting plate; 44. Second connecting plate; 45. Fixed spring; 46. Second snap-fit; 47. Second snap-fit. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods. Example

[0021] Please see Figure 1-6The present invention provides a technical solution: To achieve the above objectives, the present invention provides the following technical solution: A wind turbine gearbox double gear lubrication pump, comprising: a housing 1, a sealing cover 2 connected to the rear end of the housing 1 by screws 3; a conveying cavity 4 is provided inside the housing 1, and a first conveying gear 5 and a second conveying gear 6 are movably installed inside the conveying cavity 4, the first conveying gear 5 and the second conveying gear 6 meshing with each other; an inlet pipe 8 and an outlet pipe 9 are respectively installed at the top and bottom of the housing 1; a motor 7 is installed at the front end of the housing 1; the output end of the motor 7 passes through the front end of the housing 1 and is fixed to the first conveying gear 5; a sealing groove 10 is provided at the front end of the housing 1, and a protective cover 11 located outside the motor 7 is provided in the sealing groove 10; a fixing block 12 is fixed at the front end of the housing 1, and a fixing groove 13 is provided at the front end of the fixing block 12; a fixing strip 14 located inside the fixing groove 13 is fixed on the outer wall of the protective cover 11; a movable cavity 15 is provided inside the fixing block 12, and a movable block 16 is movably arranged in the movable cavity 15; one side of the inner wall of the movable cavity 15 is opened A movable hole 17 is provided, and a fixing hole 18 is provided on the outer wall of the fixing strip 14. A fixing post 19, which is movably disposed inside the movable hole 17 and located inside the fixing hole 18, is fixed at one end of the movable block 16. A threaded hole 20 is provided on the inner wall of the other side of the movable cavity 15. A threaded rod 21 is threadedly connected to the threaded hole 20. A knob 22 is fixed at one end of the threaded rod 21, and the other end of the threaded rod 21 is rotatably connected to the movable block 16. A heat dissipation fin 23 is installed on the outer wall of the protective cover 11, and a heat-conducting ring 24 is installed on the outer wall of the motor 7 for heat conduction. A connecting groove 25 is provided on the outer wall of the ring 24, and an installation groove 26 is provided at the bottom of the connecting groove 25. A heat-conducting telescopic rod 27 is fixed at the bottom of the installation groove 26, and a heat-conducting abutment strip 28 is fixed at the top of the heat-conducting telescopic rod 27. A heat-conducting spring 29 is provided on the outside of the heat-conducting telescopic rod 27. The two ends of the heat-conducting spring 29 are fixed to the bottom of the installation groove 26 and the bottom of the heat-conducting abutment strip 28, respectively. A heat-conducting strip 30 located inside the connecting groove 25 is fixed on the inner wall of the protective cover 11, and the bottom of the heat-conducting strip 30 contacts the top of the heat-conducting abutment strip 28.

[0022] Specifically, the protective cover 11 is placed inside the sealing groove 10. At this time, the fixing strip 14 on the outside of the protective cover 11 will be inserted into the fixing groove 13 of the fixing block 12. Then, the movable block 16 can be moved in the movable cavity 15 by the knob 22. When the movable block 16 moves, it will drive the fixing column 19 to move in the movable hole 17. When the fixing column 19 is in the fixing hole 18, the protective cover 11 can be fixed inside the sealing groove 10. Since the protective cover 11 is located outside the motor 7, the motor 7 can be protected under the action of the protective cover 11, so that the motor 7 is not easily damaged during use, thereby ensuring the working efficiency of the wind turbine generator set. Since the motor 7 is not easily damaged, it does not need to be frequently inspected and maintained, thus solving the defects existing in the prior art. After the protective cover 11 is fixed inside the sealing groove 10, the heat-conducting strip 30 will be located inside the connecting groove 25 of the heat-conducting ring 24. Under the action of heat conduction, the heat of the motor 7 will be conducted to the protective cover 11 through the heat-conducting ring 24. The protective cover 11, together with the heat dissipation fins 23, dissipates the heat, thereby indirectly achieving the purpose of dissipating heat from the motor 7. Therefore, the present invention takes into account both the protection and heat dissipation of the motor 7, further ensuring the safety of the motor 7 and improving the service life of the motor 7. When the heat-conducting strip 30 is located inside the connecting groove 25, the heat-conducting telescopic rod 27 will stretch under the action of the heat-conducting spring 29 in the mounting groove 26. When the heat-conducting telescopic rod 27 stretches, it will drive the heat-conducting abutment strip 28 to move. When the heat-conducting abutment strip 28 contacts the heat-conducting strip 30, the heat-conducting telescopic rod 27 and the heat-conducting spring 29 can act as heat-conducting medium, so that the heat of the heat-conducting ring 24 can be better conducted to the protective cover 11, ensuring the heat dissipation efficiency of the motor 7. Example

[0023] Please see Figure 1 , 2 7-10, the present invention provides a technical solution: a double gear lubrication pump for a wind turbine gearbox, wherein a connecting pipe 32 is provided inside the outlet pipe 9, a filter plate 33 is installed inside the connecting pipe 32, a threaded groove 31 is provided on the inner wall of the outlet pipe 9, and a connecting thread is provided on the outer wall of the connecting pipe 32. The connecting pipe 32 is threadedly connected to the inside of the outlet pipe 9 through the connecting thread engaging with the threaded groove 31. A fixing ring 34 and a rotating shaft 35 are fixed on the outer wall of the outlet pipe 9. A snap-fit ​​groove 36 is opened on the outer wall of the fixing ring 34, and an L-shaped strip 37 is snapped into the snap-fit ​​groove 36. A U-shaped frame 38 is fixed on the top of the L-shaped strip 37. The U-shaped frame 38 is located outside the knob 22. A connecting block 39 is fixed on the outer wall of the outlet pipe 9, and a connecting strip 40 is provided outside the connecting block 39. One end of the connecting strip 40 is connected to... The L-shaped strip 37 is fixed, and the outer walls of the two sides of the connecting strip 40 are respectively provided with a first locking hole and a second locking hole. The inner walls of the two sides of the connecting block 39 are respectively provided with a third locking hole and a fourth locking hole. The connecting block 39 is provided with a fixed telescopic rod 41. The two ends of the fixed telescopic rod 41 are respectively fixed with a first connecting plate 42 and a second connecting plate 43. The ends of the first connecting plate 42 and the second connecting plate 43 that are far apart from each other are respectively fixed with a first locking piece and a second locking piece 46. The first locking piece and the second locking piece 46 are respectively located inside the first locking hole and the third locking hole, and the second locking hole and the fourth locking hole. The fixed telescopic rod 41 is provided with a fixed spring 44. The two ends of the fixed spring 44 are respectively fixed to the first connecting plate 42 and the second connecting plate 43.

[0024] Specifically, the connecting pipe 32 is threaded to the inside of the outlet pipe 9 via the rotating shaft 35 using the threaded groove 31 and connecting thread. Since a filter plate 33 is installed inside the connecting pipe 32, the filter plate 33 can filter impurities inside the lubricating oil, improve the purity of the lubricating oil, avoid the impurities in the lubricating oil from affecting the wind turbine generator set, and ensure the working efficiency of the wind turbine generator set. By attaching the L-shaped strip 37 into the slot 36 and then placing the fixed telescopic rod 41 into the connecting block 39, the fixed telescopic rod 41 will be stretched under the action of the fixed spring 44. During this stretching motion, the fixed telescopic rod 41 will compress the first connecting plate 42 and the second connecting plate 43. Once the first clip is engaged with the first and third clip holes, and the second clip 46 is engaged with the second and fourth clip holes, the connecting block 39 and the connecting strip 40 can be connected and fixed, thereby fixing the L-shaped strip 37 into the slot 36. Because... A U-shaped bracket 38 is fixed to the top of the L-shaped strip 37, and the U-shaped bracket 38 is located outside the knob 22. Therefore, the U-shaped bracket 38 can limit the knob 22, prevent the threaded rod 21 from moving in the threaded hole 20, and prevent the fixing post 19 from falling out in the fixing hole 18, thus ensuring the connection stability of the protective cover 11. Since the L-shaped strip 37 is located inside the snap-fit ​​groove 36, the L-shaped strip 37 can limit the fixing ring 34 through the snap-fit ​​groove 36, preventing the connecting pipe 32 from loosening or falling out inside the outlet pipe 9, thus ensuring the filtering effect of the filter plate 33 on the lubricating oil.

[0025] Working principle: By installing the outer casing 1 in the designated position, connecting the inlet pipe 8 to the lubricating oil pipe, and the outlet pipe 9 to the wind turbine generator set, and then starting the motor 7, the motor 7 will drive the first conveying gear 5 to rotate. Since the first conveying gear 5 and the second conveying gear 6 mesh with each other, the first conveying gear 5 and the second conveying gear 6 will rotate in the conveying chamber 4. At this time, the lubricating oil inside the lubricating oil pipe will enter the conveying chamber 4 through the inlet pipe 8, and then enter the wind turbine generator set through the outlet pipe 9, achieving the purpose of lubricating the wind turbine generator set. In addition, the protective cover 11 can be placed inside the sealing groove 10. At this time, the fixing strip 14 on the outside of the protective cover 11 will be inserted into the fixing groove 13 of the fixing block 12. Then, the movable block 16 can be driven in the movable chamber using the knob 22. The movable block 16 moves within the movable hole 17, causing the fixed column 19 to move within the movable hole 17. Once the fixed column 19 is within the fixed hole 18, the protective cover 11 can be fixed inside the sealing groove 10. Since the protective cover 11 is located outside the motor 7, it can protect the motor 7, making it less prone to damage during use and thus ensuring the working efficiency of the wind turbine generator set. Because the motor 7 is not easily damaged, it does not require frequent inspection and maintenance. After the protective cover 11 is fixed inside the sealing groove 10, the heat-conducting strip 30 will be located inside the connecting groove 25 of the heat-conducting ring 24. Under the effect of heat conduction, the heat of the motor 7 will be conducted to the protective cover 11 through the heat-conducting ring 24. On the cover 11, the protective cover 11, together with the heat dissipation fins 23, dissipates heat, indirectly achieving the purpose of heat dissipation for the motor 7. Therefore, the present invention takes into account both protection and heat dissipation for the motor 7, further ensuring the safety of the motor 7 and improving its service life. When the heat-conducting strip 30 is located inside the connecting groove 25, under the action of the heat-conducting spring 29 in the mounting groove 26, the heat-conducting telescopic rod 27 will perform a stretching movement. When the heat-conducting telescopic rod 27 performs a stretching movement, it will drive the heat-conducting abutment strip 28 to move. When the heat-conducting abutment strip 28 contacts the heat-conducting strip 30, the heat-conducting telescopic rod 27 and the heat-conducting spring 29 can act as heat-conducting mediums, so that the heat of the heat-conducting ring 24 can be better conducted to the protective cover 11, ensuring the heat dissipation efficiency of the motor 7. Before starting the motor 7, the connecting pipe 32 is threaded into the outlet pipe 9 via the shaft 35 using the threaded groove 31 and connecting thread. Then, one end of the connecting pipe 32 is connected to the wind turbine generator set. Since a filter plate 33 is installed inside the connecting pipe 32, the filter plate 33 can filter impurities inside the lubricating oil, improve the purity of the lubricating oil, and prevent impurities in the lubricating oil from affecting the wind turbine generator set, thus ensuring the working efficiency of the wind turbine generator set. By snapping the L-shaped strip 37 into the snap-fit ​​groove 36, and then placing the fixed telescopic rod 41 into the connecting block 39, the fixed telescopic rod 41 will be driven to stretch under the action of the fixed spring 44. When the fixed telescopic rod 41 stretches, it will squeeze the first connecting plate 42 and the second connecting plate 43.After the first clip 46 is engaged with the first and third clip holes, and the second clip 46 is engaged with the second and fourth clip holes, the connecting block 39 and connecting strip 40 can be connected and fixed, thereby fixing the L-shaped strip 37 into the snap-fit ​​groove 36. Since a U-shaped bracket 38 is fixed to the top of the L-shaped strip 37 and is located outside the knob 22, the U-shaped bracket 38 can limit the knob 22, preventing the threaded rod 21 from moving within the threaded hole 20 and preventing the fixing post 19 from detaching from the fixing hole 18, thus ensuring the connection stability of the protective cover 11. Because the L-shaped strip 37 is located inside the snap-fit ​​groove 36, it can limit the fixing ring 34 through the snap-fit ​​groove 36, preventing the connecting pipe 32 from loosening or detaching inside the outlet pipe 9, thus ensuring the filtering effect of the filter plate 33 on the lubricating oil.

[0026] In the description of this invention, it should be understood that the terms "center", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-gear lubrication pump for a wind turbine gearbox, characterized in that, include: The outer casing (1) and the sealing cap (2) connected to the rear end of the outer casing (1) by screws (3); The outer shell (1) has a conveying cavity (4) inside, and a first conveying gear (5) and a second conveying gear (6) are movably installed inside the conveying cavity (4), and the first conveying gear (5) and the second conveying gear (6) mesh with each other; The top and bottom of the outer shell (1) are respectively equipped with an inlet pipe (8) and an outlet pipe (9); A motor (7) is installed at the front end of the outer casing (1); The output end of the motor (7) passes through the front end of the housing (1) and is fixed to the first conveying gear (5); The front end of the outer casing (1) is provided with a sealing groove (10), and a protective cover (11) located outside the motor (7) is provided in the sealing groove (10).

2. The wind turbine gearbox double gear lubrication pump according to claim 1, characterized in that, The front end of the outer shell (1) is fixed with a fixing block (12), the front end of the fixing block (12) is provided with a fixing groove (13), the outer wall of the protective cover (11) is fixed with a fixing strip (14) located inside the fixing groove (13), the inside of the fixing block (12) is provided with a movable cavity (15), the movable cavity (15) is movably arranged with a movable block (16), the inner wall of one side of the movable cavity (15) is provided with a movable hole (17), the outer wall of the fixing strip (14) is provided with a fixing hole (18), and one end of the movable block (16) is fixed with a fixing post (19) movably arranged inside the movable hole (17) and located inside the fixing hole (18).

3. The wind turbine gearbox double gear lubrication pump according to claim 2, characterized in that, A threaded hole (20) is provided on the inner wall of the other side of the movable cavity (15). A threaded rod (21) is threadedly connected in the threaded hole (20). A knob (22) is fixed at one end of the threaded rod (21), and the other end of the threaded rod (21) is rotatably connected to the movable block (16).

4. The wind turbine gearbox double gear lubrication pump according to claim 1, characterized in that, The outer wall of the protective cover (11) is equipped with heat dissipation fins (23).

5. A double-gear lubrication pump for a wind turbine gearbox according to claim 1, characterized in that, A heat-conducting ring (24) is installed on the outer wall of the motor (7). A connecting groove (25) is opened on the outer wall of the heat-conducting ring (24). An installation groove (26) is opened at the bottom of the connecting groove (25). A heat-conducting telescopic rod (27) is fixed at the bottom of the installation groove (26). A heat-conducting abutment strip (28) is fixed at the top of the heat-conducting telescopic rod (27). A heat-conducting spring (29) is provided on the outside of the heat-conducting telescopic rod (27). The two ends of the heat-conducting spring (29) are respectively fixed to the bottom of the installation groove (26) and the bottom of the heat-conducting abutment strip (28).

6. A double-gear lubrication pump for a wind turbine gearbox according to claim 1, characterized in that, The inner wall of the protective cover (11) is fixed with a heat-conducting strip (30) located inside the connecting groove (25), and the bottom of the heat-conducting strip (30) contacts the top of the heat-conducting abutment strip (28).

7. A double-gear lubrication pump for a wind turbine gearbox according to claim 1, characterized in that, The outlet pipe (9) is provided with a connecting pipe (32), and a filter plate (33) is installed inside the connecting pipe (32).

8. A double-gear lubrication pump for a wind turbine gearbox according to claim 7, characterized in that, The inner wall of the outlet pipe (9) is provided with a threaded groove (31), and the outer wall of the connecting pipe (32) is provided with a connecting thread. The connecting pipe (32) is threadedly connected to the inside of the outlet pipe (9) through the connecting thread engaging the threaded groove (31). A fixing ring (34) and a rotating shaft (35) are fixed on the outer wall of the outlet pipe (9).

9. A double-gear lubrication pump for a wind turbine gearbox according to claim 8, characterized in that, The outer wall of the fixing ring (34) is provided with a snap-fit ​​groove (36), and an L-shaped strip (37) is snapped into the snap-fit ​​groove (36). A U-shaped frame (38) is fixed on the top of the L-shaped strip (37), and the U-shaped frame (38) is located outside the knob (22).

10. A double-gear lubrication pump for a wind turbine gearbox according to claim 8, characterized in that, A connecting block (39) is fixed to the outer wall of the outlet pipe (9). A connecting strip (40) is provided on the outside of the connecting block (39). One end of the connecting strip (40) is fixed to the L-shaped strip (37). A first locking hole and a second locking hole are respectively opened on the outer walls of both sides of the connecting strip (40). A third locking hole and a fourth locking hole are respectively opened on the inner walls of both sides of the connecting block (39). A fixed telescopic rod (41) is provided inside the connecting block (39). A first connecting rod is fixed at both ends of the fixed telescopic rod (41). The first connecting plate (42) and the second connecting plate (43) are respectively fixed with a first clip and a second clip (46) at their respective ends. The first clip and the second clip (46) are respectively located inside the first clip hole and the third clip hole, and the second clip hole and the fourth clip hole. The fixed telescopic rod (41) is provided with a fixed spring (44) on its outside. The two ends of the fixed spring (44) are respectively fixed to the first connecting plate (42) and the second connecting plate (43).

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