Auxiliary box opening device on wind power gear box tower

Abstract

The utility model relates to the technical field of wind power gear box maintenance, in particular to an auxiliary box opening device on a wind power gear box tower. The auxiliary box opening device comprises at least two clamping pieces, every two adjacent clamping pieces are connected through a first connecting assembly, the clamping pieces are used for clamping the outer circle side of a secondary inner gear ring of the wind power gear box, and the clamping pieces are connected with a middle box body of the wind power gear box through second connecting assemblies. After a rear box body of a two-stage planetary gear box is detached from a tower, a second-stage inner gear ring is jointly clamped by a clamping piece, and the clamping piece is connected with a middle box body of a wind power gear box through a second connecting assembly, so that the second-stage inner gear ring and the middle box body are fixed together, axial restraining force is provided for the second-stage inner gear ring, the second-stage inner gear ring is prevented from moving backwards, and the service life of the second-stage inner gear ring is prolonged. Therefore, the safety risk is reduced, and the situation of oil leakage caused by a gap generated between the second-stage inner gear ring and the middle box body is prevented.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine gearbox maintenance technology, specifically to an auxiliary gearbox opening device on a wind turbine gearbox tower. Background Technology

[0002] In existing technologies, wind turbine generator gearboxes typically employ single-stage, two-stage, and three-stage planetary gearboxes to provide speed-increasing transmission for the wind turbine generator. A two-stage planetary gearbox consists of front, middle, and rear housings, and also includes first-stage and second-stage planetary gear systems. The first-stage internal gear ring of the first-stage planetary gear system is located between the front and middle housings, while the second-stage internal gear ring of the second-stage planetary gear system is located between the middle and rear housings. The diameter of the second-stage internal gear ring is smaller than that of the first-stage internal gear ring. The front housing, first-stage internal gear ring, and middle housing are connected by several first double-ended bolts distributed circumferentially, and the middle housing, second-stage internal gear ring, and rear housing are connected by several second double-ended bolts distributed circumferentially.

[0003] Currently, when maintenance on the tower requires removing the rear housing of the two-stage planetary gearbox, the second double-ended bolt must be removed simultaneously. This results in the secondary internal gear ring being connected to the intermediate housing only by a pin. The pin is primarily used to transmit torque and cannot secure the secondary internal gear ring, creating a risk of rearward displacement between the secondary internal gear ring and the planetary carrier. This poses a safety hazard, and furthermore, as working time increases, the secondary internal gear ring gradually detaches from the intermediate housing, creating a gap between them, which poses a risk of oil leakage at the mating surfaces. Utility Model Content

[0004] To address the aforementioned deficiencies, the technical problem to be solved by this utility model is to provide an auxiliary gearbox opening device for wind turbine gearbox towers. This auxiliary gearbox opening device can fix the secondary internal gear ring after the rear housing is removed from the two-stage planetary gearbox tower, preventing the risk caused by the rearward movement of the secondary internal gear ring.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] An auxiliary gearbox opening device for wind turbine gearboxes includes at least two clamping members. Two adjacent clamping members are connected by a first connecting assembly. The clamping members are used to clamp the outer circumference of the secondary internal gear ring of the wind turbine gearbox. The clamping members are connected to the middle housing of the wind turbine gearbox by a second connecting assembly.

[0007] By adopting the above scheme, after removing the rear housing of the two-stage planetary gearbox on the tower, all clamping components jointly clamp the secondary internal gear ring of the wind turbine gearbox, firmly fixing the clamping components to the secondary internal gear ring. The clamping components are connected to the middle housing of the wind turbine gearbox through the second connecting assembly, thereby fixing the secondary internal gear ring to the middle housing and providing axial constraint force for the secondary internal gear ring, preventing the secondary internal gear ring from shifting backward, thus reducing safety risks and preventing gaps between the secondary internal gear ring and the middle housing that could lead to oil leakage.

[0008] Preferably, the clamping member includes an arc-shaped base plate, with end plates fixedly connected to both ends of the base plate. An arc-shaped side plate is fixedly connected to the inner arc side of the base plate, and the inner arc side of the side plate abuts against the outer circle side of the secondary internal gear ring. The contact surface between the clamping member and the outer circle side of the secondary internal gear ring is increased by the arc-shaped side plate, allowing the clamping member to provide a stable clamping force for the secondary internal gear ring and reducing the local pressure exerted by the clamping member on the secondary internal gear ring, thus preventing damage to the surface of the secondary internal gear ring.

[0009] Preferably, the end plate has a first mounting hole. The first mounting hole on the end plate facilitates the connection between the first connecting component and the corresponding clamping component.

[0010] Preferably, the first connecting assembly includes a first bolt and a first nut. The first bolt passes through a first mounting hole located on two adjacent end plates on two base plates, and the two end plates are connected together by the first bolt and the first nut. By using the first bolt and the first nut to connect two adjacent end plates located on two base plates, the overall connection structure is simple, stable, and easy to operate.

[0011] Preferably, four clamping members are evenly distributed along the outer circumference of the secondary internal gear ring. By having four clamping members jointly clamp the secondary internal gear ring, a more stable clamping force can be provided.

[0012] Preferably, the base plate has a second mounting hole. The second mounting hole facilitates the connection between the second connecting component and the clamping member.

[0013] Preferably, the second connecting assembly includes a second bolt, a second nut, and a bolt sleeve. The second bolt is a double-ended bolt, which passes through a corresponding second mounting hole. The second nut is threaded onto one end of the second bolt and abuts against the side of the base plate away from the middle housing. The other end of the second bolt is connected to a first double-ended bolt on the middle housing via the bolt sleeve. In use, the second bolt and second nut work together to hold the base plate, i.e., to hold the fixing component, which in turn clamps the secondary internal gear ring, preventing it from retracting. The connection of one end of the second bolt to the first double-ended bolt on the middle housing via the nut sleeve fully utilizes the original structure of the secondary planetary gearbox, simplifying the overall structure of the opening device.

[0014] Preferably, the system also includes several baffles connected to the intermediate housing via a third connecting assembly. These baffles are positioned on the side of the secondary internal gear ring away from the intermediate housing and serve to abut against the side of the secondary planetary carrier of the wind turbine gearbox away from the intermediate housing. The baffles provide axial support to the secondary planetary carrier of the wind turbine gearbox, preventing it from retracting backward.

[0015] Preferably, the baffles are distributed on the upper half of the middle housing. This arrangement makes installation on the tower easier for workers.

[0016] Preferably, the baffle has a third mounting hole corresponding to the third connecting component. The third connecting component includes a third bolt and a third nut. The third bolt is a double-ended bolt, which passes through the corresponding third mounting hole. The third nut is threaded onto one end of the third bolt and abuts against the side of the baffle away from the secondary internal gear ring. The other end of the third bolt is threaded onto the middle housing. This threaded connection between the third bolt and the middle housing fully utilizes the original structure of the two-stage planetary gearbox, simplifying the overall structure of the opening device.

[0017] In summary, the auxiliary gearbox opening device for wind turbine gearboxes provided by this utility model has at least the following beneficial effects:

[0018] 1. After removing the rear housing of the two-stage planetary gearbox, the opening device can provide stable axial support for the second-stage internal gear ring and the second-stage planetary carrier, thereby preventing the second-stage internal gear ring and the second-stage planetary carrier from moving backward, reducing safety risks, and also preventing gaps from forming between the second-stage internal gear ring and the middle housing.

[0019] 2. The original structure of the two-stage planetary gearbox is fully utilized as the connection and fixing point of the opening device, making the overall structure of the opening device simpler and the operation more convenient for operators. Attached image description:

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any novel effort.

[0021] Figure 1 This is a schematic diagram of the structure of a two-stage planetary gearbox in the background art;

[0022] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 3 This is a three-dimensional structural diagram of the clamping component in this utility model;

[0024] Figure 4 This is a three-dimensional structural diagram of the present invention and the first-stage internal gear ring, the second-stage internal gear ring, and the second-stage planetary carrier in a two-stage planetary gearbox.

[0025] The reference numerals in the attached drawings include: clamping component 1, base plate 101, end plate 102, side plate 103, first mounting hole 104, second mounting hole 105, first connecting assembly 2, first bolt 201, first nut 202, second connecting assembly 3, second bolt 301, second nut 302, bolt sleeve 303, baffle 4, third connecting assembly 5, third bolt 501, third nut 502, front housing 6, middle housing 7, rear housing 8, primary internal gear ring 9, secondary internal gear ring 10, first double-ended bolt 11, second double-ended bolt 12, pin 13, connecting hole 14, and secondary planetary carrier 15. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the following description is provided in conjunction with the appendix. Figure 1-4 The present invention will be further described in detail below with reference to specific embodiments.

[0027] Please see Figure 1-4This embodiment provides an auxiliary opening device for a wind turbine gearbox tower, comprising at least two clamping members 1. Preferably, four clamping members 1 are evenly distributed along the outer circumference of the secondary internal gear ring 10. Adjacent clamping members 1 are connected by a first connecting assembly 2. The clamping members 1 are used to clamp the outer circumferential side (i.e., the outer circumferential surface of the internal gear ring) of the secondary internal gear ring 10 of the wind turbine gearbox. The clamping members 1 are connected to the middle housing 7 of the wind turbine gearbox through a second connecting assembly 3. Specifically, the clamping member 1 includes an arc-shaped base plate 101, with end plates 102 fixedly connected to both ends of the base plate 101. An arc-shaped side plate 103 is fixedly connected to the inner arc side of the base plate 101. The shape of the side plate 103 matches the shape of the secondary internal gear ring 10, and the inner arc side of the side plate 103 abuts against the outer circumferential side of the secondary internal gear ring 10. The end plate 102 is fixedly connected to both the base plate 101 and the side plate 103. The end plate 102 has a first mounting hole 104, and the base plate 101 has a second mounting hole 105. The first connecting assembly 2 includes a first bolt 201 and a first nut 202. The first bolt 201 passes through the first mounting hole 104 on two adjacent end plates 102 located on the two base plates 101. The two end plates 102 are connected together by the first bolt 201 and the first nut 202 so that the four clamping members 1 together hold the secondary internal gear ring 10 tightly.

[0028] The second connecting assembly 3 includes a second bolt 301, a second nut 302, and a bolt sleeve 303. The second bolt 301 is a double-ended bolt, which passes through the corresponding second mounting hole 105. The second nut 302 is threaded to the right end of the second bolt 301 and abuts against the side of the base plate 101 away from the middle housing 7. The left end of the second bolt 301 is connected to the first double-ended bolt 11 on the middle housing 7 via the bolt sleeve 303. The bolt sleeve 303 is a sleeve with internal threads. By threading the bolt sleeve 303 to the first double-ended bolt 11 on the middle housing 7 and to the left end of the second bolt 301, the first double-ended bolt 11 and the second bolt 301 on the middle housing 7 can be connected together. In this embodiment, the base plate 101 preferably has three second mounting holes 105. The three second mounting holes 105 are evenly distributed along the length of the base plate 101, and the positions of the second mounting holes 105 correspond to the first double-headed bolts 11 on the middle box 7.

[0029] To prevent the secondary planetary carrier 15 from shifting backward, several baffles 4 are further included. In this embodiment, three baffles 4 are preferably provided. The baffles 4 are connected to the middle housing 7 through the third connecting component 5. The baffles 4 are located on the side of the secondary internal gear ring 10 away from the middle housing 7. The baffles 4 are used to abut against the side of the secondary planetary carrier 15 of the wind turbine gearbox away from the middle housing 7. The baffles 4 are distributed in the upper half of the middle housing 7. To accommodate the height difference between the right end face of the secondary internal gear ring 10 and the right end face of the secondary planetary carrier 15, the baffles 4 are specifically Z-shaped. The upper end of the baffle 4 abuts against the right end face of the secondary internal gear ring 10, and the lower end of the baffle 4 abuts against the right end face of the secondary planetary carrier 15.

[0030] The baffle 4 has a third mounting hole corresponding to the third connecting component 5. The third connecting component 5 includes a third bolt 501 and a third nut 502. The third bolt 501 is a double-ended bolt. The third bolt 501 passes through the corresponding third mounting hole. The third nut 502 is threaded to one end of the third bolt 501. The third nut 502 abuts against the side of the baffle 4 away from the secondary internal gear ring 10. The other end of the third bolt 501 is threaded to the middle housing 7.

[0031] Please see Figure 4 When the above scheme is used, after removing the second double-ended bolt 12 on the two-stage planetary gearbox and the rear housing 8, the left end of the second bolt 301 is connected to the corresponding first double-ended bolt 11 on the middle housing 7 through the bolt sleeve 303. The two end plates 102 located on the two clamping parts 1 and adjacent to each other are connected together by the first bolt 201 and the first nut 202. The four clamping parts 1 together clamp the outer circumference of the second-stage internal gear ring 10, thereby preventing the second-stage internal gear ring 10 from moving backward. After removing the rear housing 8 and the second stud bolt 12 of the two-stage planetary gearbox, the third bolt 501 is inserted into the connecting hole 14 on the second-stage internal gear ring 10, which was originally used to install the second stud bolt 12. The left end of the third bolt 501 passes through the connecting hole 14 and is threaded to the middle housing 7. The right end of the third bolt 501 passes through the third mounting hole on the baffle 4. The third nut 502 is threaded to the right end of the third bolt 501 and is located on the right side of the baffle 4, abutting against the right side of the baffle 4. The baffle 4 is connected to the middle housing 7 through the third connecting assembly 5. The baffle 4 restricts the position of the second-stage planetary carrier 15, thereby preventing the second-stage planetary carrier 15 from moving backward and reducing safety risks.

[0032] like Figure 1As shown, the existing two-stage planetary gearbox includes a front housing 6, a middle housing 7, and a rear housing 8 arranged from left to right, and also includes a first-stage and a second-stage planetary gear system. The first-stage internal gear ring 9 of the first-stage planetary gear system is located between the front housing 6 and the rear housing 8, and the second-stage internal gear ring 10 of the second-stage planetary gear system is located between the middle housing 7 and the rear housing 8. The diameter of the second-stage internal gear ring 10 is smaller than the diameter of the first-stage internal gear ring 9. The front housing 6, the first-stage internal gear ring 9, and the middle housing 7 are connected by several first double-ended bolts 11 distributed circumferentially, and the middle housing 7, the second-stage internal gear ring 10, and the rear housing 8 are connected by several second double-ended bolts 12 distributed circumferentially. When removing the rear housing 8, the second double-ended bolts 12 need to be removed simultaneously, leaving only a pin 13 connecting the middle housing 7 and the second-stage internal gear ring 10. Since the pin 13 cannot provide axial restraint for the second-stage internal gear ring 10, the second-stage internal gear ring 10 is prone to rearward displacement.

[0033] It should be noted that words indicating direction in this article, such as "up" and "down," are all in the format of "upper" and "lower." Figure 1 The direction setting is for ease of description only and has no other specific meaning.

[0034] It should also be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or apparatus comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or apparatus that includes the aforementioned element.

[0035] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A wind turbine gearbox on-tower auxiliary unboxing device, characterized in that, The utility model relates to a wind turbine gearbox two-stage inner gear ring clamping device, including: At least two clamping pieces (1) are connected between two adjacent clamping pieces (1) through a first connecting assembly (2), the clamping piece (1) is used for clamping the outer circle side of the two-stage inner gear ring (10) of the wind turbine gearbox, and the clamping piece (1) is connected with the middle box body (7) of the wind turbine gearbox through a second connecting assembly (3).

2. A wind turbine gearbox tower auxiliary unboxing device according to claim 1, characterized in that, The clamping piece (1) includes an arc-shaped bottom plate (101), both ends of the bottom plate (101) are fixedly connected with end plates (102), and the inner arc side of the bottom plate (101) is fixedly connected with an arc-shaped side plate (103); the inner arc side of the side plate (103) abuts against the outer circle side of the two-stage inner gear ring (10).

3. A wind turbine gearbox tower auxiliary unboxing device according to claim 2, characterized in that, First mounting holes (104) are formed in the end plates (102).

4. A wind turbine gearbox tower auxiliary unboxing device according to claim 3, characterized in that, The first connecting assembly (2) includes first bolts (201) and first nuts (202), the first bolts (201) are arranged in the first mounting holes (104) on the two bottom plates (101) and the two adjacent end plates (102) respectively, and the two end plates (102) are connected together through the first bolts (201) and the first nuts (202).

5. A wind turbine gearbox tower auxiliary unboxing device according to claim 2, characterized in that, Four clamping pieces (1) are evenly arranged along the outer circumference of the two-stage inner gear ring (10).

6. A wind turbine gearbox tower auxiliary unboxing device according to claim 2, characterized in that, Second mounting holes (105) are formed in the bottom plates (101).

7. A wind turbine gearbox tower auxiliary unboxing device according to claim 6, characterized in that, The second connecting assembly (3) includes second bolts (301), second nuts (302) and bolt sleeves (303), the second bolts (301) are double-headed bolts, the second bolts (301) are arranged in the corresponding second mounting holes (105), the second nuts (302) are threadedly connected to one ends of the second bolts (301), the second nuts (302) abut against one sides of the bottom plates (101) away from the middle box body (7), and the other ends of the second bolts (301) are connected with first double-headed bolts (11) on the middle box body (7) through the bolt sleeves (303).

8. A wind turbine gearbox tower assisted opening device according to any of claims 1-7, characterized in that, A plurality of baffles (4) are further included, the baffles (4) are connected with the middle box body (7) through third connecting assemblies (5), the baffles (4) are arranged on one sides of the two-stage inner gear ring (10) away from the middle box body (7), and the baffles (4) are used for abutting against one sides of two-stage planet carriers (15) of the wind turbine gearbox away from the middle box body (7).

9. A wind turbine gearbox tower auxiliary unboxing device according to claim 8, characterized in that, The baffles (4) are distributed on upper halves of the middle box body (7).

10. A wind turbine gearbox tower auxiliary unboxing device according to claim 8, characterized in that, Third mounting holes corresponding to the third connecting assemblies (5) are formed in the baffles (4), the third connecting assemblies (5) include third bolts (501) and third nuts (502), the third bolts (501) are double-headed bolts, the third bolts (501) are arranged in the corresponding third mounting holes, the third nuts (502) are threadedly connected to one ends of the third bolts (501), the third nuts (502) abut against one sides of the baffles (4) away from the two-stage inner gear ring (10), and the other ends of the third bolts (501) are threadedly connected with the middle box body (7).

Images