On-tower maintenance tool for replacing sun gear of gearbox of wind generating set

Abstract

The invention relates to the technical field of wind driven generator component maintenance, and discloses a wind driven generator set gear box sun gear replacement tower maintenance tool which comprises a support, a gear box body, a gear box sun gear replacement tower, a gear box sun gear replacement tower, a gear box sun gear replacement tower and a gear box sun gear replacement tower, the first telescopic component is detachably connected with the gearbox body and can drive the gearbox body to rotate around the rotating shaft to a first corner position; the suspension assembly is connected to the first telescopic component and the gear box cover, and when the gear box body rotates, the gear box cover can be suspended on the suspension assembly; the bearing assembly can bear the gearbox cover; the second telescopic component is detachably connected with the gearbox body and can drive the gearbox body to rotate from the first corner position to the second corner position. According to the gearbox dismounting device, the gearbox can be dismounted in a cabin, subsequent maintenance is facilitated, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine maintenance tooling, in particular to a tower-mounted maintenance tooling for replacing a sun gear of a wind turbine gearbox. Background Art

[0002] If a wind turbine gearbox's parallel-stage low-speed pulley or planetary-stage sun gear is damaged, current repair capabilities limit the need to completely remove the gearbox from the wind turbine and return it to the factory for repair. This is because the parallel-stage low-speed pulley is large in diameter and heavy, and the dimensions of the lifting holes in some wind turbine nacelles or the rated load of the nacelle lifting equipment are insufficient to handle it. Therefore, a large ground crane is required to remove the entire gearbox from the wind turbine nacelle, remove it, and transport it to a gearbox repair shop for repair. For the OEM or owner, removing each gearbox from the nacelle incurs high equipment and lifting costs, creating a heavy financial burden.

[0003] However, the space for maintenance in the cabin is limited. There are corresponding input and output devices at both ends of the gearbox, which are difficult to operate in the axial direction. The space on both sides is basically only for pedestrians to pass through, making it difficult to perform maintenance on the gearbox in the cabin. Summary of the Invention

[0004] The present invention addresses the technical problem in the prior art of narrow space and inconvenient operation when repairing the sun gear in the gear box. It provides a tower-mounted maintenance tool for replacing the sun gear of the gear box of a wind turbine generator set, which can complete the disassembly of the sun gear in a limited space, avoiding the problem of hanging the entire machine down from the wind turbine and incurring high costs.

[0005] The present invention is achieved through the following technical solutions:

[0006] A wind turbine generator set gearbox sun gear replacement tower maintenance tool, comprising:

[0007] The support is detachably connected to the gear box body, and the gear box body can rotate around a rotating shaft on the support;

[0008] a first telescopic member, detachably connected to the gear box body, and capable of driving the gear box body to rotate around the rotation axis to a first rotation angle position;

[0009] a suspension assembly connected to the first telescopic member and the gear box cover, wherein the gear box cover can be suspended on the suspension assembly when the gear box body rotates;

[0010] A receiving assembly capable of receiving the gear box cover;

[0011] The second telescopic member is detachably connected to the gear box body and can drive the gear box body to rotate from a first rotation angle position to a second rotation angle position.

[0012] Optionally, the suspension assembly includes a main suspension component and an elastic suspension component, one end of the main suspension component is connected to the gear box cover, and the other end is connected to the telescopic part of the first telescopic component through an automatic tripping mechanism; one end of the elastic suspension component is connected to the gear box cover, and the other end is connected to the fixed part of the first telescopic component.

[0013] Optionally, the automatic release mechanism includes a hanging ring base, a hanging ring body and a locking pin, the hanging ring base is fixed to the telescopic part of the first telescopic member, the hanging ring body and the hanging ring base adopt a mutually embedded matching structure, one end of the locking pin has a bent locking part, the locking part can be inserted into the embedded part of the hanging ring body and the hanging ring base to form a lock, the other end of the locking pin has an extension part, when the extension part abuts against the fixed part of the first telescopic member, the locking part of the locking pin can be withdrawn from the embedded part of the hanging ring body and the hanging ring base to release the lock.

[0014] Optionally, the first telescopic member is a two-stage telescopic hydraulic cylinder.

[0015] Optionally, the receiving assembly includes a slide rail, a vehicle body and a receiving seat. The vehicle body can move along the slide rail. The receiving seat is arranged on the vehicle body and connected to the vehicle body by an elastic member. A receiving groove is provided on one side of the receiving seat for receiving the gear box cover.

[0016] Optionally, the accommodating groove includes a supporting inclined portion and a recessed portion, the gear box cover can be placed in the recessed portion and lean against the supporting inclined portion, and a detachable pin is provided on one side edge of the recessed portion, and the detachable pin can limit the gear box cover.

[0017] Optionally, the support is provided with an inclined guide portion, and one side of the recessed portion can be maintained in a coplanar position with the inclined guide portion.

[0018] Optionally, the second telescopic member is a hydraulic cylinder.

[0019] Optionally, a fixing frame is further included, which is fixed on the inner wall of the cabin, and the first telescopic member and the second telescopic member are both connected to the fixing frame.

[0020] Optionally, the support is fixedly connected to the bottom of the cabin.

[0021] The technical solution of the present invention has at least the following beneficial effects:

[0022] The wind turbine generator set gearbox sun gear replacement tower top maintenance tool of the present invention realizes support for the gearbox by setting a support, and relies on the first telescopic member and the second telescopic member to transmit traction in sequence, so that the gearbox can rotate around the rotating axis of the support by a large angle, thereby providing sufficient avoidance space and facilitating axial disassembly of the sun gear; at the same time, a suspension component and a receiving component are provided, and the gearbox cover can be removed and placed on the receiving component by relying on the suspension component when the gearbox rotates, so as to facilitate the subsequent disassembly of the sun gear and other gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the gearbox structure of a wind turbine generator set in the prior art;

[0024] Figure 2 This is a schematic diagram of the layout of the gearbox in the wind turbine nacelle in the prior art;

[0025] Figure 3 This is a first working diagram of the maintenance tool on the tower for replacing the sun gear of the wind turbine gearbox of the present invention;

[0026] Figure 4 A second working diagram of the tower-mounted maintenance tool for replacing the sun gear of a wind turbine gearbox according to the present invention;

[0027] Figure 5 A third working diagram of the tower-mounted maintenance tool for replacing the sun gear of a wind turbine gearbox according to the present invention;

[0028] Figure 6 A fourth working diagram of the tower-mounted maintenance tool for replacing the sun gear of a wind turbine generator gearbox according to the present invention;

[0029] Figure 7 The fifth working diagram of the wind turbine generator set gearbox sun gear replacement tower maintenance tool of the present invention;

[0030] Figure 8 The sixth working diagram of the wind turbine generator gearbox sun gear replacement tower maintenance tool of the present invention;

[0031] Figure 9 It is a cross-sectional view of the automatic tripping mechanism of the present invention;

[0032] Figure 10 It is the front view of the receiving seat of the present invention.

[0033] Reference numerals:

[0034] 100-gearbox, 101-box body, 102-box cover, 103-sun gear, 200-engine room, 310-first telescopic member, 321-main suspension member, 322-elastic suspension member, 323-automatic tripping mechanism, 3231-hanging ring base, 3232-hanging ring body, 3233-locking pin, 330-fixing frame, 340-support, 351-slide rail, 352-car body, 353-receiving seat, 3531-supporting inclined portion, 3532-recessed portion, 3553-inclined guide portion, 354-detachable pin, 360-second telescopic member. DETAILED DESCRIPTION

[0035] Reference Figure 1-10 The tower-mounted maintenance tool for replacing the sun gear 103 of a wind turbine generator gearbox 100 of the present invention comprises a support 340, a first telescopic member 310, a suspension assembly, a receiving assembly, a second telescopic member 360, and a fixing bracket 330. The support 340 and fixing bracket 330 can be either integral or separate structures. A lug is provided on the top of the support 340, which is rotatably connected to the bottom of the gearbox 100 via a pin. The support 340 has a triangular structure, one side of which can be aligned with the gearbox 100 and placed below the gearbox 100. It is then bolted to the bottom of the wind turbine's nacelle 200. The fixing bracket can be a vertical structure fixedly connected to the inner wall of one side of the nacelle 200. The fixing bracket is primarily used to mount the first telescopic member 310 and the second telescopic member 360.

[0036] In this embodiment, the first telescopic member 310 adopts a two-stage telescopic hydraulic cylinder, which can provide a longer telescopic stroke. The bottom end of the first telescopic member 310 is hingedly connected to the fixed bracket, and its movable end is detachably connected to the gear box 100 using a pin structure.

[0037] After the support 340 is fixed to the bottom of the cabin 200, a rotatable connection is formed between the ear plate of the support 340 and the bottom of the gearbox 100 through a connecting pin, and then the movable end of the first telescopic member 310 is hingedly connected to the ear plate on the gearbox 100. The gearbox 100 can be rotated around the connecting pin of the support 340 through the telescopic action of the first telescopic member 310.

[0038] A suspension assembly is also provided between the first telescopic member 310 and the cover 102 of the gearbox 100. When the housing 101 of the gearbox 100 rotates, the cover 102 of the gearbox 100 can be suspended from the suspension assembly. The suspension assembly includes a main suspension member 321 and an elastic suspension member 322. The main suspension member 321 is connected to the cover 102 of the gearbox 100 at one end and to the telescopic portion of the first telescopic member 310 via an automatic release mechanism 323 at the other end. The elastic suspension member 322 is connected to the cover 102 of the gearbox 100 at one end and to the fixed portion of the first telescopic member 310 at the other end. The main suspension member 321 is constructed of a steel cable or chain, while the elastic suspension member 322 is constructed of a connecting member with a certain elastic force, such as a combination of a coil spring and a steel cable. A section of steel cable and a section of spring form the elastic suspension member 322 with a certain elastic force. The main suspension component 321 plays the main lifting role. When the gear box 100 is rotated, the box cover 102 of the gear box 100 can be lifted away from the box body 101 through the telescopic action of the first telescopic component 310, and then the automatic tripping mechanism 323 is used to complete the separation of the main suspension component 321 and the box cover 102. Then, the elastic suspension component 322 is used to ensure that the box cover 102 can reduce the impact force and achieve buffering when it falls on the receiving component.

[0039] Among them, the automatic tripping mechanism 323 includes a hanging ring base 3231, a hanging ring body 3232 and a locking pin 3233. The hanging ring base 3231 is fixed to the telescopic part of the first telescopic member 310. The hanging ring body 3232 and the hanging ring base 3231 adopt a mutually embedded matching structure. One end of the locking pin 3233 has a bent locking part, which can be inserted into the embedded part of the hanging ring body 3232 and the hanging ring base 3231 to form a lock. The other end of the locking pin 3233 has an extension part. When the extension part abuts against the fixed part of the first telescopic member 310, the locking part of the locking pin 3233 can be withdrawn from the embedded part of the hanging ring body 3232 and the hanging ring base 3231 to release the lock. By arranging the automatic tripping mechanism 323, the first telescopic member 310 can be tripped when it contracts to a certain extent, thereby releasing the suspension force of the main suspension member 321 on the box cover 102, allowing the box cover 102 to move in the direction of falling into the receiving assembly.

[0040] The receiving assembly can be used to receive the box cover 102, and specifically includes a slide rail 351, a car body 352, and a receiving seat 353. The car body 352 can move along the slide rail 351. The receiving seat 353 is arranged on the car body 352 and is connected to the car body 352 by an elastic member. A receiving groove is provided on one side of the receiving seat 353 for receiving the box cover 102 of the gear box 100. The slide rail 351 is arranged in advance in the nacelle 200. The slide rail 351 can be a conventional track-type slide rail 351 or a roller-type slide rail 351. The slide rail 351 is arranged next to the fixed frame 330, and the car body 352 is arranged on the slide rail 351. The car body 352 can move along the slide rail 351. The receiving seat 353 is arranged on the car body 352. An elastic member, such as a spring, can be arranged between the receiving seat 353 and the car body 352 to achieve buffering.

[0041] The accommodating groove includes a supporting inclined portion 3531 and a recessed portion 3532. The box cover 102 of the gear box 100 can be placed in the recessed portion 3532 and lean against the supporting inclined portion 3531. A detachable pin 354 is provided on one side edge of the recessed portion 3532. The detachable pin 354 can limit the box cover 102 of the gear box 100.

[0042] Reference Figure 3-Figure 7 Before the first telescopic member 310 telescopes and drives the gearbox 100 to rotate, the main suspension member 321 and the elastic suspension member 322 are first connected at their respective ends in the connection method described above; the movable end of the first telescopic member 310 is also connected to the housing 101 of the gearbox 100; and the support 340 is connected to the housing 101 of the gearbox 100. After all the connection actions are completed, the connecting pins and other connecting parts between the gear box 100 and the base used for daily fixation are removed, and the connecting bolts between the box cover 102 of the gear box 100 and the box body 101 are removed. The first telescopic member 310 can be retracted to drive the box body 101 of the gear box 100 to rotate, and the box cover 102 is also gradually separated from the box cover 102 under the suspension action of the suspension assembly. When the first telescopic member 310 is retracted to trigger the automatic tripping mechanism 323, the main suspension member 321 loses its suspension function, and the box cover 102 falls into the receiving groove of the receiving seat 353 on the vehicle body 352. During this process, the elastic suspension member 322 elastically pulls the box cover 102 to prevent the box cover 102 from causing a large impact on the receiving seat 353, and at the same time cooperates with the elastic member between the vehicle body 352 and the receiving seat 353 to reduce the impact on the box cover 102. At this point, the first telescopic member 310 has driven the case 101 of the gear box 100 to rotate around the rotation axis to the first rotation angle position, and the case cover 102 of the gear box 100 has also been disassembled. On the slide rail 351, the case cover 102 of the gear box 100 can be moved along the slide rail 351 by moving the vehicle body 352, and the case cover 102 is moved to a position that does not affect the disassembly of the sun gear 103.

[0043] The second telescopic member 360 can be a single-stage hydraulic cylinder. The second telescopic member 360 is detachably connected to the housing 101 of the gearbox 100 and is capable of rotating the housing 101 of the gearbox 100 from a first rotational angle to a second rotational angle. The other end of the second telescopic member 360 is connected to the fixed frame 330. The second telescopic member 360 allows the housing 101 of the gearbox 100 to be further rotated, thereby increasing its rotation angle and facilitating subsequent removal of the sun gear 103.

[0044] After the first telescopic member 310 is retracted to the first rotation angle position, the telescopic end of the second telescopic member 360 can be connected to the housing 101 of the gearbox 100, and then the telescopic end of the first telescopic member 310 is removed. Subsequently, the housing 101 of the gearbox 100 continues to rotate by relying on the retraction of the second telescopic member 360.

[0045] After the first telescopic member 310 is retracted to the first rotation angle position, the output shaft gear, the intermediate-speed shaft pinion, and the intermediate-speed shaft gear in the gearbox 100 can be removed. Then, the second telescopic member 360 is connected, and the receiving assembly is moved to its original position. By retracting the second telescopic member 360, the housing 101 of the gearbox 100 can continue to be pulled to rotate until it is rotated to the second rotation angle position. At this time, the sun gear 103 can be conveniently removed from the empty space in the cabin 200. During removal, a conventional axle removal tool can be used to axially withdraw it from the gearbox 103. Since the gearbox 100 has been rotated to a sufficient angle, the operation and maintenance personnel will have enough space to complete the removal of the sun gear 103 shaft from the side of the cabin 200, avoiding the high cost and time required to hoist the gearbox 100 as a whole for maintenance during disassembly in the prior art.

[0046] Reference Figure 7-Figure 8 After the sun gear 103 is removed, the second telescopic member 360 can be extended to rotate the gearbox 100 in the opposite direction. The low-speed shaft gear, freed from the constraints of the sun gear 103, can then slide out smoothly from the side. In this embodiment, the support 340 is provided with an inclined guide portion 3553. One side of the recessed portion 3532 can be kept coplanar with the inclined guide portion 3553. Simultaneously, the detachable latch 354 on one side of the receiving slot can be removed, and the low-speed shaft gear can then be smoothly slid into the receiving slot through the inclined portion, enabling the removal or maintenance of the low-speed shaft gear. Of course, if the low-speed shaft gear does not need to be repaired or removed, it can also be restrained in the gearbox 100 by a limiting structure.

Claims

1. A wind turbine generator set gearbox sun gear replacement tower maintenance tool, characterized in that: include: The support is detachably connected to the gear box body, and the gear box body can rotate around a rotating shaft on the support; a first telescopic member, detachably connected to the gear box body, and capable of driving the gear box body to rotate around the rotation axis to a first rotation angle position; a suspension assembly connected to the first telescopic member and the gear box cover, wherein the gear box cover can be suspended on the suspension assembly when the gear box body rotates; A receiving assembly capable of receiving the gear box cover; The second telescopic member is detachably connected to the gear box body and can drive the gear box body to rotate from a first rotation angle position to a second rotation angle position.

2. The wind turbine generator set gearbox sun gear replacement tower maintenance tool according to claim 1 is characterized in that: The suspension assembly includes a main suspension component and an elastic suspension component, one end of the main suspension component is connected to the gear box cover, and the other end is connected to the telescopic part of the first telescopic component through an automatic tripping mechanism; one end of the elastic suspension component is connected to the gear box cover, and the other end is connected to the fixed part of the first telescopic component.

3. The wind turbine generator set gearbox sun gear replacement tower maintenance tool according to claim 2, characterized in that: The automatic tripping mechanism includes a hanging ring base, a hanging ring body and a locking pin. The hanging ring base is fixed to the telescopic part of the first telescopic member. The hanging ring body and the hanging ring base adopt a mutually embedded matching structure. One end of the locking pin has a bent locking part, and the locking part can be inserted into the embedded part of the hanging ring body and the hanging ring base to form a lock. The other end of the locking pin has an extension part. When the extension part abuts against the fixed part of the first telescopic member, the locking part of the locking pin can be withdrawn from the embedded part of the hanging ring body and the hanging ring base to release the lock.

4. The wind turbine generator set gearbox sun gear replacement tower maintenance tool according to claim 2, characterized in that: The first telescopic member is a two-stage telescopic hydraulic cylinder.

5. The wind turbine generator set gearbox sun gear replacement tower maintenance tool according to claim 1, characterized in that: The receiving assembly includes a slide rail, a vehicle body and a receiving seat. The vehicle body can move along the slide rail. The receiving seat is arranged on the vehicle body and connected to the vehicle body by an elastic member. A receiving groove is provided on one side of the receiving seat for receiving the gear box cover.

6. The wind turbine generator set gearbox sun gear replacement tower maintenance tool according to claim 5, characterized in that: The accommodating groove includes a supporting inclined portion and a recessed portion. The gear box cover can be placed in the recessed portion and lean against the supporting inclined portion. A detachable pin is provided on one side edge of the recessed portion, and the detachable pin can limit the gear box cover.

7. The wind turbine generator set gearbox sun gear replacement tower maintenance tool according to claim 6, characterized in that: The support is provided with an inclined guide portion, and one side of the recessed portion can be maintained in a coplanar position with the inclined guide portion.

8. The wind turbine generator set gearbox sun gear replacement tower maintenance tool according to claim 1, characterized in that: The second telescopic member is a hydraulic cylinder.

9. The wind turbine generator set gearbox sun gear replacement tower maintenance tool according to claim 1, characterized in that: It also includes a fixing frame fixed on the inner wall of the cabin, and the first telescopic member and the second telescopic member are both connected to the fixing frame.

10. The wind turbine generator set gearbox sun gear replacement tower maintenance tool according to claim 1, characterized in that: The support is fixedly connected to the bottom of the cabin.

Images