Rear gear box of wind power gear box

Abstract

The invention discloses a rear gear box of a wind power gear box, and belongs to the field of wind power gear boxes. The device comprises a plurality of through grooves formed in the rear gear box, the through grooves are communicated with positioning holes and a lubricating cavity, lubricating liquid in the lubricating cavity can be guided to the three positioning holes, and sliding sealing columns are arranged in the three through grooves. Lubricating liquid is pushed to flow or prevented from entering the penetrating grooves through sliding of the sealing columns, rotating control columns are arranged in the lubricating cavities, eccentric wheels are arranged on the surfaces of the control columns, the positions of the sealing columns in the penetrating grooves are controlled through the eccentric wheels and reset springs, and flowing of the lubricating liquid in the three penetrating grooves can be rapidly controlled. Through rotation of the independent control column, adding of lubricating liquid in the three positioning holes is achieved, relative operation is simpler and more convenient, the whole penetrating groove is formed in the rear gearbox, the lubricating liquid cannot leak out when flowing, and it is guaranteed that the lubricating liquid accurately slides to the designated position.

Description

Technical Field

[0001] The present invention relates to the field of wind power gearboxes, in particular to a rear gearbox of a wind power gearbox. Background Art

[0002] A wind turbine gearbox is a crucial mechanical component in wind power generation. Its primary function is to transmit the wind power generated by the rotor to the generator, achieving the desired speed. Wind turbine gearboxes, categorized as TA models, are power systems or devices with high power, high torque, and high output characteristics. They are relatively large and typically consist of a front gearbox and a rear gearbox connected by bolts. The rear gearbox is typically the component of the gearbox system that is directly connected to the output shaft.

[0003] The existing rear gearbox of a wind turbine gearbox generally has three positioning holes for locating the position of the planetary gears. There are generally separate through-grooves on the surfaces of the three positioning holes. When the wind turbine gearbox is put into use, lubricating liquid can be injected from the through-grooves to lubricate the positioning holes and the output shaft of the planetary gear to ensure the smooth rotation of the planetary gears; however, under normal circumstances, the three through-grooves are relatively small and require specific tools for injection, and the three positioning holes generally have different diameters. Due to usage requirements, the volume of lubricating liquid required for a single injection is different. The operator needs to inject different volumes of lubricating liquid at a specific position. The through-grooves need to be located during the process, and the volume of the lubricating liquid to be injected needs to be measured multiple times. The overall process requires high accuracy. The lubricating liquid may overflow due to a slight offset of the injection equipment or improper injection force by the operator. It is difficult to ensure that all the lubricating liquid is injected into the specified position, and the lubrication effect cannot be guaranteed.

[0004] In summary, when lubricating the positioning holes of the rear gearbox of the wind turbine gearbox in the prior art, it is necessary to manually measure different volumes of lubricating liquid and locate the through-groove position to add lubrication, which makes it difficult to ensure that the lubricating liquid completely reaches the designated position. Summary of the Invention

[0005] The present invention provides a rear gearbox for a wind turbine gearbox, which can solve the problem in the prior art that when lubricating the positioning holes of the rear gearbox of a wind turbine gearbox, it is necessary to manually measure different volumes of lubricating liquid and locate the through-groove position to add lubrication, which makes it difficult to ensure that the lubricating liquid completely reaches the designated position.

[0006] The rear gearbox of the wind turbine gearbox includes a rear gearbox, three positioning holes are opened on the surface of the rear gearbox, and a lubrication mechanism is provided between the rear gearbox and the positioning holes, and the lubrication mechanism includes: A lubrication chamber is provided inside the rear gearbox, wherein three through-grooves are provided inside the rear gearbox, wherein the three through-grooves respectively connect the lubrication chamber and the positioning hole, wherein sealing posts are slidably connected inside each of the through-grooves, wherein the sealing posts are adapted to the through-grooves, and a return spring is fixedly connected between the sealing posts and the lubrication chamber; A control column is rotatably arranged inside the lubrication cavity, and a limit assembly for limiting is provided between the control column and the rear gear box. Three eccentric wheels are fixedly connected to the surface of the control column, and the eccentric wheels are all in contact with the sealing column. The three eccentric wheels are arranged at intervals.

[0007] Optionally, a plurality of connecting pipes are fixedly connected to the surface of the rear gear box, and the ends of the connecting pipes are connected to the through grooves.

[0008] Optionally, a sealing block is detachably connected to the surface of the rear gear box, and the sealing block is adapted to the lubrication cavity.

[0009] Optionally, a plurality of observation windows are fixedly provided on the surface of the sealing block, and the plurality of observation windows are staggered.

[0010] Optionally, the cross section of the sealing column is H-shaped, a guide ring is fixedly connected to the inside of the lubrication cavity, the sealing column is slidingly connected to the guide ring, and the return spring is fixedly arranged between the guide ring and the sealing column and sleeved on the surface of the sealing column.

[0011] Optionally, a communicating groove adapted to the control column is provided on the surface of the sealing block, an operating column is slidably connected inside the control column, and a limiting assembly for limiting rotation is provided between the operating column and the sealing block.

[0012] Optionally, the limiting assembly includes a plurality of limiting teeth fixedly arranged on the surface of the sealing block, and the plurality of limiting teeth are arranged in a ring array on the surface of the connecting groove. The surface of the operating column is threadedly connected to a mounting column, and the mounting column is fixedly connected to a plurality of connecting teeth close to the side of the sealing block, and the connecting teeth are adapted to the limiting teeth.

[0013] Optionally, a connecting spring is fixedly connected between the operating column and the control column, a movable shaft is fixedly connected to the surface of the operating column, a movable groove is opened inside the control column, and the movable shaft is adapted to the movable groove.

[0014] Optionally, a liquid injection groove is provided on the surface of the rear gear box, the liquid injection groove is connected to the lubrication chamber, a sealing cover is slidably connected to the inside of the liquid injection groove, an elastic plate is fixedly connected to the inside of the lubrication chamber, the elastic plate covers the control column and the eccentric wheel, and the projection of the elastic plate toward the liquid injection groove covers half of the area of ​​the liquid injection groove.

[0015] Optionally, a protruding block is fixedly connected to the interior of the rear gear box, and the protruding block is fixedly arranged between the two through grooves away from the liquid injection groove.

[0016] The present invention provides a rear gearbox of a wind turbine gearbox, comprising a plurality of through grooves provided inside the rear gearbox, wherein the through grooves are connected to the positioning holes and the lubricating cavity, and the lubricating liquid inside the lubricating cavity can be guided to the positions of the three positioning holes, and a sliding sealing column is provided inside the three through grooves, and the sliding of the sealing column promotes the flow of the lubricating liquid or hinders the lubricating liquid from entering the through grooves, and a rotating control column is provided inside the lubricating cavity, and an eccentric wheel is provided on the surface of the control column. The position of the sealing column inside the through groove is controlled by the eccentric wheel and the return spring, and the flow of the lubricating liquid inside the three through grooves can be quickly controlled. When it is necessary to add lubricating liquid to the inside of the three positioning holes, the control column can be directly rotated to prompt the sealing column to move, and then the lubricating liquid can flow into the surface of the positioning hole, so that there is a proper amount of lubricating liquid between the planetary gear output shaft and the positioning block hole; the addition of lubricating liquid to the three positioning holes is achieved by rotating a separate control column, which is relatively simple to operate, and the entire through groove is provided inside the rear gearbox, so that the lubricating liquid will not leak when flowing, thereby ensuring that the lubricating liquid slides accurately to the specified position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the rear gearbox structure of the wind turbine gearbox provided by the present invention; Figure 2 The present invention provides Figure 1 A magnified view of the local structure at point A; Figure 3 A structural perspective view of the rear gearbox provided by the present invention; Figure 4 This is a three-dimensional exploded view of the lubrication mechanism provided by the present invention; Figure 5 A three-dimensional structural cross-sectional view of the rear gearbox provided by the present invention; Figure 6 The present invention provides Figure 5 A magnified view of the local structure at point B in the middle.

[0018] Description of reference numerals: 1. Rear gearbox; 2. Positioning hole; 31. Lubrication chamber; 32. Through groove; 33. Sealing column; 34. Return spring; 35. Control column; 36. Eccentric wheel; 41. Connecting pipe; 42. Sealing block; 43. Observation window; 44. Guide ring; 51. Connecting groove; 52. Operating column; 53. Limiting tooth; 54. Mounting column; 55. Connecting tooth; 56. Connecting spring; 61. Liquid injection groove; 62. Sealing cover; 63. Elastic plate; 64. Protruding block. DETAILED DESCRIPTION

[0019] The specific embodiments of the present application are described in detail below, but it should be understood that the scope of protection of the present application is not limited by the specific embodiments.

[0020] As shown in Figures 1 to 6 The rear gear box of the wind power gear box provided by the embodiment of the present application comprises a rear gear box 1, three positioning holes 2 are formed on the surface of the rear gear box 1, a lubricating mechanism is arranged between the rear gear box 1 and the positioning holes 2, and the lubricating mechanism comprises: A lubricating cavity 31 is formed in the rear gear box 1, three through grooves 32 are formed in the rear gear box 1, the three through grooves 32 are respectively connected with the lubricating cavity 31 and the positioning holes 2, a sealing column 33 is slidably connected in each of the through grooves 32, the sealing column 33 is matched with the through groove 32, and a return spring 34 is fixedly connected between the sealing column 33 and the lubricating cavity 31. A control column 35 is rotatably arranged in the lubricating cavity 31, a limiting assembly for limiting is arranged between the control column 35 and the rear gear box 1, three eccentric wheels 36 are fixedly connected to the surface of the control column 35, the eccentric wheels 36 are in contact with the sealing columns 33, and the three eccentric wheels 36 are arranged at intervals.

[0021] In summary, the rear gear box of the wind power gear box provided by the embodiment of the present application comprises a plurality of through grooves 32 formed in the rear gear box 1, the through grooves 32 are connected with the positioning holes 2 and the lubricating cavity 31, the lubricating liquid in the lubricating cavity 31 can be guided to the positions of the three positioning holes 2, the sealing columns 33 are arranged to slide in the three through grooves 32, the lubricating liquid is pushed to flow or prevented from entering the through grooves 32 by the sliding of the sealing columns 33, the control column 35 is arranged to rotate in the lubricating cavity 31, the eccentric wheels 36 are arranged on the surface of the control column 35, the position of the sealing column 33 in the through groove 32 is controlled by the eccentric wheels 36 and the return spring 34, the lubricating liquid in the three through grooves 32 can be quickly controlled to flow, when it is necessary to increase the lubricating liquid in the three positioning holes 2, the control column 35 can be directly rotated to drive the sealing column 33 to move, and then the lubricating liquid can flow to the surface of the positioning hole 2, so that there is a proper amount of lubricating liquid between the planetary gear output shaft and the positioning block hole; the addition of the lubricating liquid in the three positioning holes 2 is realized by the rotation of the separate control column 35, the operation is relatively simple, and the through grooves 32 are all formed in the rear gear box 1, so that the lubricating liquid will not leak out when flowing, and the accurate sliding of the lubricating liquid to the specified position is ensured. In some specific embodiments, a plurality of connecting pipes 41 are fixedly connected to the surface of the rear gear box 1, and the end portions of the connecting pipes 41 are communicated with the through grooves 32; the fixed connecting pipes 41 are arranged on the surface of the rear gear box 1 and communicated with the through grooves 32, so that the passage for the lubricating liquid to flow to the positioning holes 2 can be individually formed on the surface of the rear gear box 1, and the smooth sliding of the lubricating liquid to the positioning holes 2 is ensured. In some specific embodiments, the rear gear box 1 surface is detachably connected with a sealing block 42, which is matched with the lubricating cavity 31; the sealing block 42 and the lubricating cavity 31 are provided with sealing rings (not shown in the figure) at the contact positions, the lubricating cavity 31 can be sealed by the sealing block 42, so that the lubricating cavity 31 can store lubricating liquid, and subsequent cleaning and maintenance of the control column 35 and other structures are facilitated, and smooth transmission is ensured; In further embodiments, a plurality of observation windows 43 are fixedly arranged on the surface of the sealing block 42, and the observation windows 43 are staggered; through the observation windows 43, the internal lubricating liquid storage state of the lubricating cavity 31 can be directly observed; In further embodiments, the sealing block 42 and the rear gear box 1 surface are both provided with a fixing groove, and a fixing rod is threadedly connected in the fixing groove; In some specific embodiments, the cross section of the sealing column 33 is H-shaped, a guide ring 44 is fixedly connected in the lubricating cavity 31, the sealing column 33 is slidingly connected with the guide ring 44, and the return spring 34 is fixedly arranged between the guide ring 44 and the sealing column 33 and is sleeved on the surface of the sealing column 33; the guide ring 44 is arranged to limit the sliding distance and sliding track of the sealing column 33, so that the sealing column 33 can be tightly fitted with the through groove 32 after resetting, and gaps at this position are avoided; In some specific embodiments, the surface of the sealing block 42 is provided with a communication groove 51 matched with the control column 35, the control column 35 is slidingly connected with an operation column 52, and a limiting component for limiting rotation is arranged between the operation column 52 and the sealing block 42; In further embodiments, the limiting component includes a plurality of limiting teeth 53 fixedly arranged on the surface of the sealing block 42, the limiting teeth 53 are arranged in a ring array on the surface of the communication groove 51, an installation column 54 is threadedly connected on the surface of the operation column 52, a plurality of connecting teeth 55 are fixedly connected on the side of the installation column 54 close to the sealing block 42, and the connecting teeth 55 are matched with the limiting teeth 53; In further embodiments, a connecting spring 56 is fixedly connected between the operation column 52 and the control column 35, a moving shaft is fixedly connected on the surface of the operation column 52, a moving groove is arranged in the control column 35, and the moving shaft is matched with the moving groove; In some specific embodiments, a liquid injection groove 61 is formed on the surface of the rear gearbox 1. The liquid injection groove 61 is connected to the lubrication chamber 31. A sealing cover 62 is slidably connected to the interior of the liquid injection groove 61. An elastic plate 63 is fixedly connected to the interior of the lubrication chamber 31. The elastic plate 63 covers the control column 35 and the eccentric wheel 36. The projection of the elastic plate 63 toward the liquid injection groove 61 covers half of the area of ​​the liquid injection groove 61. The elastic plate 63 can divert the lubricating liquid dripping from the liquid injection groove 61 to ensure that sufficient lubricating liquid flows into the eccentric wheel 36 away from the liquid injection groove 61. It should be noted that the sealing cover 62 is made of silicone and has a small diameter groove on its surface to ensure that the gas in the lubrication cavity 31 can flow without leaking the lubricating liquid. In a further embodiment, a protrusion block 64 is fixedly connected to the inside of the rear gearbox 1, and the protrusion block 64 is fixedly arranged between the two through grooves 32 away from the injection groove 61; through the protrusion block 64, the lubricating liquid on the surface of the through groove 32 away from the injection groove 61 is prevented from flowing to a lower position, affecting the speed of the lubricating liquid flowing into the through groove 32.

[0022] Working principle of the present invention: Before lubrication, first open the sealing cover 62 and inject an appropriate amount of lubricating liquid into the lubrication cavity 31 through the injection groove 61. Ensure that there is sufficient lubricating liquid at all three through-grooves 32 through the observation window 43, and then insert the sealing cover 62 into the injection groove 61. When lubricating, pull the mounting post 54 to cause the limiting teeth 53 and the connecting teeth 55 to disengage, then rotate the mounting post 54 to drive the operating post 52 and the control post 35 to rotate, causing the eccentric wheel 36 to rotate, and the eccentric wheel 36 to disengage from the sealing post 33. Under the action of the return spring 34, the sealing post 33 will disengage from the through groove 32, and the lubricating liquid will flow into the through groove 32. When the eccentric wheel 36 contacts the sealing post 33 again, the sealing post 33 slides toward the inside of the through groove 32, pushing the lubricating liquid to flow. After the amount of lubricating liquid in the positioning hole 2 is sufficient, rotate the control post 35 to cause all the eccentric wheels 36 to contact the sealing post 33, loosen the mounting post 54, and under the action of the connecting spring 56, the limiting teeth 53 and the connecting teeth 55 engage to limit the rotation of the control post 35.

[0023] The above disclosures are only a few specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. Wind turbine gearbox rear gearbox, characterized in that, It comprises a rear gear box (1), wherein three positioning holes (2) are provided on the surface of the rear gear box (1), and a lubrication mechanism is provided between the rear gear box (1) and the positioning holes (2), wherein the lubrication mechanism comprises: A lubrication chamber (31) is provided inside the rear gear box (1), three through-grooves (32) are provided inside the rear gear box (1), the three through-grooves (32) are connected to the lubrication chamber (31) and the positioning hole (2) respectively, a sealing column (33) is slidably connected inside each of the through-grooves (32), the sealing column (33) is adapted to the through-grooves (32), and a return spring (34) is fixedly connected between the sealing column (33) and the lubrication chamber (31); A control column (35) is rotatably arranged inside the lubrication cavity (31), and a position limiting assembly for limiting is provided between the control column (35) and the rear gear box (1). Three eccentric wheels (36) are fixedly connected to the surface of the control column (35), and the eccentric wheels (36) are all in contact with the sealing column (33). The three eccentric wheels (36) are arranged at intervals.

2. The wind turbine gearbox rear gearbox according to claim 1, characterized in that: A plurality of connecting pipes (41) are fixedly connected to the surface of the rear gear box (1), and the ends of the connecting pipes (41) are in communication with the through grooves (32).

3. The wind turbine gearbox rear gearbox according to claim 1, characterized in that: A sealing block (42) is detachably connected to the surface of the rear gear box (1), and the sealing block (42) is adapted to the lubrication cavity (31).

4. The wind turbine gearbox rear gearbox according to claim 3, characterized in that: A plurality of observation windows (43) are fixedly provided on the surface of the sealing block (42), and the plurality of observation windows (43) are staggered.

5. The wind turbine gearbox rear gearbox according to claim 1, characterized in that: The cross section of the sealing column (33) is H-shaped. A guide ring (44) is fixedly connected to the interior of the lubrication cavity (31). The sealing column (33) is slidably connected to the guide ring (44). The return spring (34) is fixedly arranged between the guide ring (44) and the sealing column (33) and is sleeved on the surface of the sealing column (33).

6. The wind turbine gearbox rear gearbox according to claim 3, characterized in that: A communicating groove (51) adapted to the control column (35) is provided on the surface of the sealing block (42); an operating column (52) is slidably connected inside the control column (35); and a limiting assembly for limiting rotation is provided between the operating column (52) and the sealing block (42).

7. The wind turbine gearbox rear gearbox according to claim 6, characterized in that: The limiting assembly comprises a plurality of limiting teeth (53) fixedly arranged on the surface of the sealing block (42), wherein the plurality of limiting teeth (53) are arranged in an annular array on the surface of the connecting groove (51), and a mounting column (54) is threadedly connected to the surface of the operating column (52), and a plurality of connecting teeth (55) are fixedly connected to the side of the mounting column (54) close to the sealing block (42), and the connecting teeth (55) are adapted to the limiting teeth (53).

8. The wind turbine gearbox rear gearbox according to claim 6, characterized in that: A connecting spring (56) is fixedly connected between the operating column (52) and the control column (35), a movable shaft is fixedly connected to the surface of the operating column (52), a movable groove is provided inside the control column (35), and the movable shaft is adapted to the movable groove.

9. The wind turbine gearbox rear gearbox according to claim 1, characterized in that: A liquid injection groove (61) is provided on the surface of the rear gear box (1), the liquid injection groove (61) is communicated with the lubrication chamber (31), a sealing cover (62) is slidably connected to the inside of the liquid injection groove (61), an elastic plate (63) is fixedly connected to the inside of the lubrication chamber (31), the elastic plate (63) covers the control column (35) and the eccentric wheel (36), and the projection of the elastic plate (63) toward the liquid injection groove (61) covers half of the area of ​​the liquid injection groove (61).

10. The wind turbine gearbox rear gearbox according to claim 9, characterized in that: A protruding block (64) is fixedly connected to the interior of the rear gear box (1), and the protruding block (64) is fixedly arranged between the two through grooves (32) away from the liquid injection groove (61).

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