A super-megawatt wind power gear box uniform load structure
By designing a load-sharing structure for ultra-large megawatt wind turbine gearboxes, and utilizing the staggered transmission of branch pipes, connecting pipes, and linkage gears, combined with the elastic reset of telescopic rods and disc springs, the problems of unstable transmission and unbalanced load in multi-stage splicing of wind turbine gearboxes are solved, achieving stable transmission and extended service life.
Patent Information
- Application Number
- CN202611303906.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-26
- Publication Date
- 2026-11-03
AI Technical Summary
In actual operation, existing ultra-large megawatt wind turbine gearboxes cannot provide a sufficient speed ratio range or withstand the torque of ultra-high power with a single-stage transmission device, requiring multi-stage splicing, which results in the output shaft needing precise alignment and unbalanced load.
The ultra-large megawatt wind turbine gearbox adopts a load-sharing structure. Through the cooperation of branch pipes, connecting pipes, sliders and linkage gears, slight misalignment transmission is achieved. Combined with the elastic reset of telescopic rods and disc springs, transmission stability and load balance are ensured, and overspeed damage to the generator is prevented.
It achieves stable transmission and load balancing in wind turbine gearboxes, reduces wear, extends service life, prevents overspeed damage to generators, and improves transmission efficiency.
Smart Images
Figure CN123028229A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of wind turbine gearbox technology, and in particular to a load-sharing structure for an ultra-large megawatt wind turbine gearbox. Background Technology
[0002] The wind turbine gearbox is a key component of the wind turbine's transmission system. Its primary function is to boost the low-speed, high-torque rotor speed to the high speed required by the generator, while simultaneously bearing and transmitting enormous torque. It achieves speed ratio amplification through multi-stage gear transmission and is the mechanical hub that enables the efficient conversion of wind energy into electrical energy.
[0003] In actual operation, existing ultra-large megawatt wind turbine gearboxes often use gear transmissions to change the input speed to meet the speed required by the generator. However, single-stage transmission devices often cannot provide a sufficient speed ratio range or withstand the torque of ultra-high power. Therefore, several transmission mechanisms must be used in series to form a multi-stage splicing structure. This multi-stage splicing means that the output shaft of each stage needs to be precisely aligned and reliably fixed with the input shaft of the next stage. Therefore, an ultra-large megawatt wind turbine gearbox load-sharing structure is needed to achieve rigid connection and load balancing between the two shafts. Summary of the Invention
[0004] The purpose of this invention is to address the shortcomings of existing technologies. In actual operation, existing ultra-large megawatt wind turbine gearboxes often use gear transmissions to change the input speed to meet the speed required by the generator. However, single-stage transmission devices often cannot provide a sufficient speed ratio range or withstand the torque of ultra-high power. Therefore, it is necessary to use several transmission mechanisms in series to form a multi-stage splicing structure. This multi-stage splicing means that the output shaft of each stage needs to be precisely aligned and reliably fixed with the input shaft of the next stage. Therefore, an ultra-large megawatt wind turbine gearbox load-sharing structure is needed to achieve rigid connection and load balancing between the two shafts.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a load-sharing structure for a super-large megawatt wind turbine gearbox, comprising an input rod, one end of which is provided with a connecting mechanism, the other end of which is fixedly connected to a chassis mechanism via the connecting mechanism, a connecting mechanism on one side of the chassis mechanism, a linkage mechanism on one side of the connecting mechanism, and a lower stage rod on one side of the connecting mechanism. The chassis mechanism includes two housings, a bearing is fixedly installed between the inner walls of the two housings, a shaft is fixedly connected to the inner wall of the bearing, and the linkage mechanism includes a first gear fixed to the outer surface of the shaft. A branch pipe is provided on the outer surface of the first gear. A connecting pipe is fixedly connected to one end of the branch pipe. A retaining ring is fixedly connected to the inner wall of the branch pipe. A disc spring is fixedly connected to one end of the retaining ring. A second gear is fixedly connected to one side of the disc spring. The first gear and the second gear are meshed together. Multiple sliding holes are provided on the outer surface of the branch pipe. A slider is slidably connected to the inner wall of the sliding hole. One side of the slider is fixedly connected to the outer surface of the second gear. A toothed groove is provided on the inner wall of the connecting pipe. A linkage gear is meshed with the inner wall of the toothed groove. The inner wall of the linkage gear is fixedly sleeved on the outer surface of the lower rod.
[0006] In a preferred embodiment, a push block is slidably connected to the inner wall of the sliding hole, and an extension ring is fixedly connected between the outer surfaces of the plurality of push blocks.
[0007] In a preferred embodiment, the linkage mechanism further includes multiple telescopic rods fixed to the outer surface of the housing. One end of each telescopic rod is rotatably provided with a push ring. One side of the push ring is provided with multiple ball grooves. The inner wall of the ball grooves is rotatably connected with a rotating ball. The inner wall of the push ring is slidably connected to the outer surface of the branch pipe.
[0008] In a preferred embodiment, the connecting mechanism includes a rigid tube, a flexible tube fixedly connected to the inner wall of the rigid tube, a limit tube fixedly connected to the inner wall of the flexible tube, and a connecting rod being driven to one end of the input rod through the limit tube.
[0009] In a preferred embodiment, a limiting ring is rotatably connected to the inner wall of the housing, a flexible ring is fixedly connected to the inner wall of the limiting ring, a support ring is fixedly connected to the inner wall of the flexible ring, the inner wall of the support ring is fixedly connected to the outer surface of the connecting rod, and a planetary mechanism is provided at one end of the connecting rod.
[0010] In a preferred embodiment, the planetary mechanism includes an internal gear ring rotatably connected inside the housing and a sun gear fixed to one end of a connecting rod. The inner wall of the internal gear ring is meshed with multiple planet gears, and the planet gears are meshed with the sun gear.
[0011] In a preferred embodiment, a planetary rod is fixedly connected to the inner wall of the planetary gear, and two supports are fixedly sleeved between the outer surfaces of the three planetary rods.
[0012] In one preferred embodiment, one side of one of the brackets is fixedly connected to one end of the shaft, and one side of the other bracket is provided with a through hole for the connecting rod to pass through and be fixed to the sun gear.
[0013] In a preferred embodiment, the bracket has three support holes on one side, and the inner wall of each support hole is rotatably connected to a collar.
[0014] In a preferred embodiment, a flexible ball ring is fixedly connected to the inner wall of the collar, a ball shaft is fixedly connected to the inner wall of the flexible ball ring, and the inner wall of the ball shaft is fixedly connected to the outer surface of the planetary rod.
[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. In this invention, the branch pipe and the connecting pipe cooperate with each other, enabling the branch pipe to drive the connecting pipe to rotate. Multiple sliders on the second gear are located inside the sliding holes, allowing the second gear to drive the branch pipe to rotate via the sliders and sliding holes, which in turn drives the connecting pipe to rotate. Due to the characteristics of the first gear and the second gear on the shaft, the first and second gears can be slightly misaligned. This allows the shaft to rotate, driving the connecting pipe to rotate. The connecting pipe, through the tooth groove, drives the linkage gear to rotate, which in turn drives the lower stage rod to rotate. The characteristics of the tooth groove and the linkage gear allow for slight misalignment of the linkage gear, enabling the linkage mechanism to have a load-sharing function, thus making the rotation of the lower stage rod more stable when driven by the shaft.
[0016] 2. In this invention, the telescopic rod can drive the push ring to move. The push ring, in conjunction with the push block, makes the movement trajectory of the push ring more stable. The movement of the push ring can drive the slider to move through the extension ring and the push block, thereby causing the second gear to separate from the first gear and compressing the disc spring. This can terminate the transmission of the planetary mechanism. When the input speed of the planetary gear exceeds rpm, the separation action is triggered. The maximum compression of the disc spring is .mm. This can prevent the high speed of the planetary mechanism transmission from causing the subsequent planetary mechanism speed to be unable to change and thus damaging the generator. The elastic potential energy provided by the disc spring can drive the second gear to reset, so that the second gear meshes with the first gear and forms a linkage. The rotating ball can reduce the wear between the ball and the extension ring and increase the service life of the mechanism. Attached Figure Description
[0017] Figure 1 This invention presents a structural schematic diagram of a load-sharing structure for an ultra-large megawatt wind turbine gearbox; Figure 2 This invention presents an exploded structural diagram of the gearbox mechanism of a super-large megawatt wind turbine gearbox load-sharing structure. Figure 3 This invention provides a cross-sectional view of the connection mechanism of a load-sharing structure for an ultra-large megawatt wind turbine gearbox. Figure 4 This invention provides an exploded structural diagram of the support structure of a load-sharing structure for an ultra-large megawatt wind turbine gearbox. Figure 5 This invention presents an exploded structural diagram of the ball shaft of a load-sharing structure for a super-large megawatt wind turbine gearbox. Figure 6 This invention presents a cross-sectional exploded view of the linkage mechanism in a load-sharing structure of a super-large megawatt wind turbine gearbox.
[0018] Legend: 1. Input rod; 2. Chassis mechanism; 3. Connecting mechanism; 4. Linkage mechanism; 5. Lower stage rod; 21. Housing; 22. Shaft; 23. Limiting ring; 24. Flexible ring; 25. Support ring; 26. Planetary mechanism; 27. Bearing; 28. Connecting rod; 261. Sun gear; 262. Internal gear ring; 263. Planet gear; 264. Planet rod; 265. Support; 266. Support hole; 267. Ball bearing; 268. Flexible ball ring; 269. Collar; 31. Rigid pipe; 32. Flexible pipe; 33. Limiting pipe; 41. Branch pipe; 42. Connecting pipe; 43. First gear; 44. Retaining ring; 45. Second gear; 46. Sliding hole; 47. Sliding block; 48. Push block; 49. Extension ring; 410. Telescopic rod; 411. Push ring; 412. Rotating ball; 413. Gear groove; 414. Linkage gear. 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] Example: like Figure 1-6As shown, the present invention provides a technical solution: a load-sharing structure for a super-large megawatt wind turbine gearbox, including an input rod 1, a connecting mechanism 3 at one end of the input rod 1, and a chassis mechanism 2 fixedly connected to one end of the input rod 1 through the connecting mechanism 3. A connecting mechanism 3 is provided on one side of the chassis mechanism 2, a linkage mechanism 4 is provided on one side of the connecting mechanism 3, and a lower stage rod 5 is provided on one side of the connecting mechanism 3. The chassis mechanism 2 includes two housings 21, a bearing 27 is fixedly installed between the inner walls of the two housings 21, and a shaft 22 is fixedly connected to the inner wall of the bearing 27. The linkage mechanism 4 includes a first gear 43 fixed to the outer surface of the shaft 22. A branch pipe 41 is provided, and a connecting pipe 42 is fixedly connected to one end of the branch pipe 41. A retaining ring 44 is fixedly connected to the inner wall of the branch pipe 41. A disc spring is fixedly connected to one end of the retaining ring 44. A second gear 45 is fixedly connected to one side of the disc spring. A first gear 43 and a second gear 45 are meshed together. A plurality of sliding holes 46 are opened on the outer surface of the branch pipe 41. A slider 47 is slidably connected to the inner wall of the sliding holes 46. One side of the slider 47 is fixedly connected to the outer surface of the second gear 45. A toothed groove 413 is opened on the inner wall of the connecting pipe 42. A linkage gear 414 is meshed with the inner wall of the toothed groove 413. The inner wall of the linkage gear 414 is fixedly sleeved on the outer surface of the lower rod 5. Through the above embodiments, the branch pipe 41 and the connecting pipe 42 cooperate with each other, enabling the branch pipe 41 to drive the connecting pipe 42 to rotate. Multiple sliders 47 on the second gear 45 are located inside the sliding hole 46, allowing the second gear 45 to drive the branch pipe 41 to rotate via the sliders 47 and the sliding hole 46, which in turn drives the connecting pipe 42 to rotate. Due to the characteristics of the first gear 43 on the shaft 22 cooperating with the second gear 45, the first gear 43 and the second gear 45 can be slightly misaligned. This allows the shaft 22 to rotate, driving the connecting pipe 42 to rotate. The connecting pipe 42 then drives the linkage gear 414 to rotate via the tooth groove 413, which in turn drives the lower rod 5 to rotate. The characteristics of the tooth groove 413 and the linkage gear 414 allow for slight misalignment of the linkage gear 414, enabling the linkage mechanism 4 to have a load-sharing function. This makes the rotation of the lower rod 5 by the shaft 22 more stable. The first gear 43 and the second gear 45 are meshed together with a meshing backlash of 0.15-0.25mm and a misalignment of 0.3-0.5mm under normal working conditions. The linkage gear 414 is made of 20CrMnTi material, and the tooth surface hardness after carburizing and quenching is HRC58-62. The pitch circle diameter is 240mm, the module is 8mm, the number of teeth is 30, and the meshing backlash with the tooth groove 413 is 0.12-0.2mm. This enables the linkage mechanism 4 to have a load-sharing function, so that when the shaft 22 drives the lower rod 5 to rotate, it can be more stable. The maximum load-sharing deviation of this load-sharing structure is ≤3%, which can compensate for manufacturing and installation errors of ≤0.2mm. The inner wall of the sliding hole 46 is slidably connected to a push block 48, and an extension ring 49 is fixedly connected between the outer surfaces of the multiple push blocks 48. The linkage mechanism 4 also includes multiple telescopic rods 410 fixed to the outer surface of the housing 21. A push ring 411 is rotatably provided at one end of the multiple telescopic rods 410. Multiple ball grooves are opened on one side of the push ring 411. A rotating ball 412 is rotatably connected to the inner wall of the ball groove. The inner wall of the push ring 411 is slidably connected to the outer surface of the branch pipe 41. Through the above embodiments, the telescopic rod 410 can drive the push ring 411 to move. The push ring 411, in conjunction with the push block 48, makes the movement trajectory of the push ring 411 more stable. The movement of the push ring 411 can drive the slider 47 to move through the extension ring 49 and the push block 48, thereby driving the second gear 45 to separate from the first gear 43 and compressing the disc spring, thus terminating the transmission of the planetary mechanism 26. When the planetary input speed exceeds 1200 rpm, the separation action is triggered. The maximum compression of the disc spring is 2.5 mm, which can prevent the planetary mechanism 26 from driving at a high speed, which would cause the subsequent speed of the planetary mechanism 26 to be unable to change and thus damage the generator. The elastic potential energy provided by the disc spring can drive the second gear 45 to reset, so that the second gear 45 meshes with the first gear 43 to form a linkage. The rotating ball 412 can reduce the wear between the ball and the extension ring 49 and increase the service life of the mechanism. The telescopic rod 410 uses an electro-hydraulic rod; The connecting mechanism 3 includes a rigid tube 31, a flexible tube 32 is fixedly connected to the inner wall of the rigid tube 31, a limit tube 33 is fixedly connected to the inner wall of the flexible tube 32, and a connecting rod 28 is connected to one end of the input rod 1 through the limit tube 33. Among them, the rigid tube 31 is a seamless steel pipe made of 42CrMo, with a hardness of HB260-280 after quenching and tempering. The flexible tube 32 is a multi-layer stainless steel corrugated pipe made of 06Cr19Ni10, with a torsional stiffness of 45N·m / °, a maximum torsional angle of 0.4° under rated torque, and a maximum compensation angle of 1.8°. It can compensate for the coaxiality error between the connecting rod 28 and the planetary star with ≤0.5mm and the angle deviation with ≤1.5°. The inner wall of the flexible tube 32 is fixedly connected to a limiting tube 33 made of 42CrMo, which can limit the radial displacement of the connecting rod 28 while allowing it to rotate freely in the circumference. A limiting ring 23 is rotatably connected to the inner wall of the housing 21. A flexible ring 24 is fixedly connected to the inner wall of the limiting ring 23. A support ring 25 is fixedly connected to the inner wall of the flexible ring 24. The inner wall of the support ring 25 is fixedly connected to the outer surface of the connecting rod 28. A planetary mechanism 26 is provided at one end of the connecting rod 28. The planetary mechanism 26 includes an internal gear ring 262 rotatably connected inside the housing 21 and a sun gear 261 fixed to one end of the connecting rod 28. The inner wall of the internal gear ring 262 is meshed with multiple planet gears 263, and the planet gears 263 are meshed with the sun gear 261. Planetary gear 263 is fixedly connected to the inner wall of the planetary gear 263. Two brackets 265 are fixedly sleeved between the outer surfaces of the three planetary gears 264. One side of one bracket 265 is fixedly connected to one end of the shaft 22. The other bracket 265 has a through hole on one side for connecting rod 28 to pass through and be fixed to sun gear 261. Three support holes 266 are provided on one side of the bracket 265. A collar 269 is rotatably connected to the inner wall of the support hole 266. A soft ball ring 268 is fixedly connected to the inner wall of the collar 269. A ball shaft 267 is fixedly connected to the inner wall of the soft ball ring 268. The inner wall of the ball shaft 267 is fixedly connected to the outer surface of the planetary rod 264. Through the above embodiments, the ball shaft 267, the soft ball ring 268 and the collar 269 enable the planetary rod 264 to have a slight vibration function, so as to adapt to the sun gear 261 to drive the planetary gear 263 to rotate, thereby driving the support 265 to rotate. Among them, the collar 269 is made of 20CrMnTi, with a hardness of HRC58-62 after carburizing and quenching; the soft ball ring 268 is made of polyurethane elastomer with a hardness of Shore A70-80, allowing a maximum runout angle of 0.8° for the planetary rod 264; the ball shaft 267 is made of GCr15, with a hardness of HRC60-64 after quenching; the inner wall of the ball shaft 267 is fixedly connected to the outer surface of the planetary rod 264 with an interference fit of 0.03-0.06mm.
[0021] Working principle: like Figure 1-6 As shown, in use, the input rod 1 is driven to rotate by the fan blades. The rotation of the input rod 1 drives the connecting rod 28 to rotate through the connecting mechanism 3. The rotation of the connecting rod 28 drives the sun gear 261 to rotate. The rotation of the sun gear 261 drives the planet gear 263 to rotate. The rotation of the planet gear 263 drives the bracket 265 to rotate through the planetary rod 264. The rotation of the bracket 265 drives the shaft 22 to rotate. The rotation of the shaft 22 drives the first gear 43 to rotate. The rotation of the first gear 43 drives the second gear 45 to rotate. The rotation of the second gear 45 drives the branch pipe 41 to rotate through the slider 47. The rotation of the branch pipe 41 drives the connecting pipe 42 to rotate. The rotation of the connecting pipe 42 drives the lower rod 5 to rotate through the linkage gear 414. The rotation of the lower rod 5 drives the subsequent planetary speed-increasing mechanism to operate, and finally drives the generator input end to rotate to achieve the power supply effect. When the shaft 22 rotates at a high speed, it drives the push ring 411 to move through the telescopic rod 410. The movement of the push ring 411 drives the extension ring 49 to move. The movement of the extension ring 49 drives the slider 47 to move through the push block 48. The movement of the slider 47 drives the second gear 45 to move. The movement of the second gear 45 drives the disc spring to compress. At the same time, the second gear 45 and the first gear 43 rotate, so the shaft 22 cannot drive the branch pipe 41 to rotate. When linkage is required, the telescopic rod 410 resets. At this time, the disc spring resets the second gear 45 and the first gear 43, thus completing the linkage reset. Then, the shaft 22 can drive the lower rod 5 to rotate through the linkage mechanism 4.
Claims
1. A load-sharing structure for a super-large megawatt wind turbine gearbox, comprising an input rod (1), characterized in that: One end of the input rod (1) is provided with a connecting mechanism (3), and one end of the input rod (1) is fixedly connected to the chassis mechanism (2) through the connecting mechanism (3). One side of the chassis mechanism (2) is provided with a connecting mechanism (3), and one side of the connecting mechanism (3) is provided with a linkage mechanism (4). One side of the connecting mechanism (3) is provided with a lower rod (5). The chassis mechanism (2) includes two housings (21), and a bearing (27) is fixedly installed between the inner walls of the two housings (21). A shaft (22) is fixedly connected to the inner wall of the bearing (27). The linkage mechanism (4) includes a first gear (43) fixed to the outer surface of the shaft (22). A branch pipe (41) is provided on the outer surface of the first gear (43). One side of the branch pipe (41) is connected to the shaft (22). A connecting pipe (42) is fixedly connected to the end of the branch pipe (41). A retaining ring (44) is fixedly connected to the inner wall of the branch pipe (41). A disc spring is fixedly connected to one end of the retaining ring (44). A second gear (45) is fixedly connected to one side of the disc spring. The first gear (43) and the second gear (45) are meshed together. A plurality of sliding holes (46) are opened on the outer surface of the branch pipe (41). A slider (47) is slidably connected to the inner wall of the sliding hole (46). One side of the slider (47) is fixedly connected to the outer surface of the second gear (45). A toothed groove (413) is opened on the inner wall of the connecting pipe (42). A linkage gear (414) is meshed with the inner wall of the toothed groove (413). The inner wall of the linkage gear (414) is fixedly sleeved on the outer surface of the lower rod (5).
2. The load-sharing structure of a super-large megawatt wind turbine gearbox according to claim 1, characterized in that: The inner wall of the sliding hole (46) is slidably connected to a push block (48), and an extension ring (49) is fixedly connected between the outer surfaces of the plurality of push blocks (48).
3. The load-sharing structure of a super-large megawatt wind turbine gearbox according to claim 2, characterized in that: The linkage mechanism (4) also includes multiple telescopic rods (410) fixed to the outer surface of the housing (21). One end of each telescopic rod (410) is rotatably provided with a push ring (411). A plurality of ball grooves are provided on one side of the push ring (411). A rotating ball (412) is rotatably connected to the inner wall of the ball groove. The inner wall of the push ring (411) is slidably connected to the outer surface of the branch pipe (41).
4. The load-sharing structure of a super-large megawatt wind turbine gearbox according to claim 1, characterized in that: The connecting mechanism (3) includes a rigid tube (31), a flexible tube (32) is fixedly connected to the inner wall of the rigid tube (31), a limit tube (33) is fixedly connected to the inner wall of the flexible tube (32), and a connecting rod (28) is connected to one end of the input rod (1) through the limit tube (33).
5. The load-sharing structure of a super-large megawatt wind turbine gearbox according to claim 1, characterized in that: The inner wall of the housing (21) is rotatably connected to a limiting ring (23), the inner wall of the limiting ring (23) is fixedly connected to a flexible ring (24), the inner wall of the flexible ring (24) is fixedly connected to a support ring (25), the inner wall of the support ring (25) is fixedly connected to the outer surface of the connecting rod (28), and one end of the connecting rod (28) is provided with a planetary mechanism (26).
6. The load-sharing structure of a super-large megawatt wind turbine gearbox according to claim 5, characterized in that: The planetary mechanism (26) includes an internal gear ring (262) rotatably connected inside the housing (21) and a sun gear (261) fixed to one end of the connecting rod (28). The inner wall of the internal gear ring (262) is meshed with multiple planet gears (263), and the planet gears (263) are meshed with the sun gear (261).
7. The load-sharing structure of a super-large megawatt wind turbine gearbox according to claim 6, characterized in that: The inner wall of the planetary gear (263) is fixedly connected to a planetary rod (264), and two supports (265) are fixedly sleeved between the outer surfaces of the three planetary rods (264).
8. The load-sharing structure of a super-large megawatt wind turbine gearbox according to claim 7, characterized in that: One side of one of the brackets (265) is fixedly connected to one end of the shaft (22), and the other bracket (265) has a through hole on one side for the connecting rod (28) to pass through and be fixed to the sun gear (261).
9. The load-sharing structure of a super-large megawatt wind turbine gearbox according to claim 8, characterized in that: The bracket (265) has three support holes (266) on one side, and the inner wall of the support hole (266) is rotatably connected to a collar (269).
10. The load-sharing structure of a super-large megawatt wind turbine gearbox according to claim 9, characterized in that: The inner wall of the collar (269) is fixedly connected to a soft ball ring (268), the inner wall of the soft ball ring (268) is fixedly connected to a ball shaft (267), and the inner wall of the ball shaft (267) is fixedly connected to the outer surface of the planetary rod (264).