A wind power generation speed increasing planetary gearbox

Abstract

The present invention discloses a wind power generation speed-increasing planetary gearbox, comprising a box unit, a first-stage transmission mechanism and a speed-increasing transmission unit. A first-stage rotating element is arranged between the first-stage star wheel shaft and the first-stage planetary wheel. The first-stage rotating element comprises a plurality of steel balls. The outer side wall of the first-stage star wheel shaft has an outer raceway matched with the steel balls. The inner side wall of the first-stage planetary wheel has an inner raceway matched with the steel balls. The steel balls roll and slide in the inner raceway and the outer raceway. Compared with the structure of bearings adopted in the prior art, the number of steel balls loaded is increased, thereby greatly improving the bearing capacity of the first-stage rotating element, realizing large-load and high-efficiency transmission. The single-head assembly of the first-stage star wheel shaft is anti-slipping, which naturally realizes axial positioning and avoids friction on the end faces of the first-stage planetary wheels. At the same time, the structure of the first transmission mechanism is simplified, which is beneficial to simplifying the overall structure of the wind power generation speed-increasing planetary gearbox and reducing its volume and weight.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation equipment and its peripheral supporting facilities, and particularly to a wind power generation speed increasing planetary gearbox. Background Art

[0002] Existing wind power generation speed increasing gearboxes generally use multi-stage planetary gears to achieve speed increasing transmission. Its specific structure is as follows: Inside the housing composed of end plates, a ring gear, and a partition plate, the planet carrier for fixing the sun gear shaft is a double-end plate structure rigidly connected by two end plates at the front and rear plus connecting parts. The two ends of the sun gear shaft are respectively fixed in the shaft holes of the front and rear end plates. The planetary gears installed on the sun gear shaft are clamped between the two end plates. The front and rear end plates are respectively installed and fixed on the speed increasing gearbox end plate or the intermediate partition plate through bearings. Since the transmission ratio of the wind power generation speed increasing gearbox is large, a multi-stage planetary gear series connection structure is generally used. This makes the structure of the speed increasing gearbox too complex and bloated, unnecessarily increasing too much volume and weight. It not only increases the manufacturing and installation costs but also is not conducive to the large-scale development of wind turbines. Summary of the Invention

[0003] The purpose of the present invention is to provide a wind power generation speed increasing planetary gearbox to solve the problems existing in the above-mentioned prior art, simplify the structure of the wind power generation speed increasing planetary gearbox, reduce its volume and weight, and improve the installation convenience of the speed increasing planetary gearbox.

[0004] To achieve the above object, the present invention provides the following solution: The present invention provides a wind power generation speed increasing planetary gearbox, including:

[0005] A housing unit, the housing unit includes a housing shell, an input shaft, and an output shaft;

[0006] The first-stage transmission mechanism, the first-stage transmission mechanism includes a first-stage star wheel carrier, a first-stage star wheel shaft, a first-stage planetary gear, a first-stage ring gear, and a first-stage sun gear. The first-stage star wheel carrier is connected to the input shaft. One end of the first-stage star wheel shaft is connected to the first-stage star wheel carrier, and the other end is suspended. The first-stage planetary gear is rotatably sleeved on the first-stage star wheel shaft. Both the first-stage ring gear and the first-stage sun gear are meshed with the first-stage planetary gear. The first-stage ring gear is connected to the housing shell, and the first-stage sun gear is coaxially arranged with the first-stage star wheel carrier. A first-stage rotary element is arranged between the first-stage star wheel shaft and the first-stage planetary gear. The first-stage rotary element includes a plurality of steel balls. The outer side wall of the first-stage star wheel shaft has an outer raceway adapted to the steel balls, and the inner side wall of the first-stage planetary gear has an inner raceway adapted to the steel balls. Both the outer raceway and the inner raceway are annular groove structures and are coaxially arranged with the first-stage planetary gear and the first-stage star wheel shaft. The steel balls are movably arranged in the space enclosed by the inner raceway and the outer raceway. The groove depth of the inner raceway is 1.5‰ - 2‰ of the maximum diameter of the ring formed by the bottom surface of the groove;

[0007] The speed-increasing transmission unit, the first-stage sun gear is connected to the input end of the speed-increasing transmission unit, and the output end of the speed-increasing transmission unit is connected to the output shaft.

[0008] Preferably, the number of the first-stage rotary elements is multiple groups, and all the rotary elements are arranged along the axial direction of the first-stage star wheel shaft. The outer raceway and the inner raceway correspond to the first-stage rotary elements one by one;

[0009] A main support rotary element is arranged between the first-stage star wheel carrier and the first-stage ring gear. The structure of the main support rotary element is the same as that of the first-stage rotary element, and also includes a plurality of the steel balls. Both the first-stage ring gear and the first-stage star wheel carrier are respectively in two-point contact with each of the steel balls. The first-stage ring gear has a filling hole, and the steel balls can be added between the first-stage star wheel carrier and the first-stage ring gear by using the filling hole.

[0010] Preferably, the first-stage star wheel carrier has a star wheel shaft hole adapted to the first-stage star wheel shaft. The star wheel shaft hole is a stepped hole, and the first-stage star wheel shaft is in interference fit with the star wheel shaft hole;

[0011] The star wheel shaft holes correspond to the first-stage star wheel shafts one by one, and the star wheel shaft holes are circumferentially evenly distributed around the axis of the first-stage star wheel carrier.

[0012] Preferably, the speed increasing transmission unit includes a second-stage transmission mechanism, which includes a second-stage star wheel carrier, a second-stage star wheel shaft, second-stage planet gears, a second-stage ring gear, and a second-stage sun gear. The first-stage sun gear is connected to the second-stage star wheel carrier. The second-stage star wheel shaft is connected to the second-stage star wheel carrier. The second-stage planet gears are rotatably sleeved on the second-stage star wheel shaft. Both the second-stage ring gear and the second-stage sun gear are engaged with the second-stage planet gears. The second-stage ring gear is connected to the box housing. The second-stage sun gear is coaxially arranged with the second-stage star wheel carrier. A second-stage rotary element is arranged between the second-stage star wheel shaft and the second-stage planet gears. The second-stage rotary element has the same structure as the first-stage rotary element. Both the second-stage star wheel shaft and the second-stage planet gears have raceways adapted to the second-stage rotary element.

[0013] Preferably, the first-stage sun gear has a stepped structure. The first-stage sun gear is connected to the second-stage star wheel carrier by a spline and also by bolts.

[0014] Preferably, the speed increasing transmission unit further includes a third-stage transmission mechanism, which includes a third-stage star wheel carrier, a third-stage star wheel shaft, third-stage planet gears, a third-stage ring gear, and a third-stage sun gear. The second-stage sun gear is connected to the third-stage star wheel carrier. The third-stage star wheel shaft is connected to the third-stage star wheel carrier. The third-stage planet gears are rotatably sleeved on the third-stage star wheel shaft. Both the third-stage ring gear and the third-stage sun gear are engaged with the third-stage planet gears. The third-stage ring gear is connected to the box housing. The third-stage sun gear is coaxially arranged with the third-stage star wheel carrier. A third-stage rotary element is arranged between the third-stage star wheel shaft and the third-stage planet gears. The third-stage rotary element has the same structure as the first-stage rotary element. Both the third-stage star wheel shaft and the third-stage planet gears have raceways adapted to the third-stage rotary element. The third-stage sun gear is in transmission connection with the output shaft.

[0015] Preferably, the second-stage sun gear has a stepped structure. The second-stage sun gear is connected to the third-stage star wheel carrier by a spline and also by bolts.

[0016] Preferably, rolling elements are arranged between the first-stage sun gear and the first-stage star wheel carrier, and between the first-stage sun gear and the second-stage sun gear to form isolation bearings.

[0017] Preferably, the first-stage sun gear, the second-stage sun gear, and the third-stage sun gear are all of hollow structure. The input shaft passes through the first-stage sun gear, the second-stage sun gear, and the third-stage sun gear and then is connected to the first-stage star gear carrier. The third-stage sun gear includes a main body section and a parallel transmission gear. The main body section rotatably passes through the second-stage sun gear and the first-stage sun gear and then is rotatably connected to the first-stage star gear carrier. Ball bearings are provided between the main body section and the first-stage star gear carrier, the first-stage sun gear, the second-stage sun gear, and the housing shell. The parallel transmission gear is coaxially connected to the main body section and meshes with the output shaft. The structure of the ball bearings is the same as that of the steel balls, and the main body section, the first-stage star gear carrier, the first-stage sun gear, the second-stage sun gear, and the housing shell all have raceways adapted to the ball bearings.

[0018] Preferably, the housing shell includes a front end plate, an intermediate housing, and an end cover. The front end plate is connected to the intermediate housing by the first-stage gear ring. The first-stage star gear carrier is rotatably connected to the front end plate, and a sealing element is provided therebetween. The end cover is connected to the side of the intermediate housing away from the first-stage gear ring. The input shaft and the output shaft both rotatably pass through the end cover and extend into the housing shell.

[0019] The present invention has achieved the following technical effects compared with the prior art: The wind power generation speed increasing planetary gearbox of the present invention includes a housing unit, a first-stage transmission mechanism, and a speed increasing transmission unit. Among them, the housing unit includes a housing shell, an input shaft, and an output shaft. The first-stage transmission mechanism includes a first-stage star gear carrier, a first-stage star gear shaft, a first-stage planetary gear, a first-stage gear ring, and a first-stage sun gear. The first-stage star gear carrier is connected to the input shaft. One end of the first-stage star gear shaft is connected to the first-stage star gear carrier, and the other end is suspended. The first-stage planetary gear is rotatably sleeved on the first-stage star gear shaft. The first-stage gear ring and the first-stage sun gear both mesh with the first-stage planetary gear. The first-stage gear ring is connected to the housing shell, and the first-stage sun gear is coaxially arranged with the first-stage star gear carrier. A first-stage rotary element is provided between the first-stage star gear shaft and the first-stage planetary gear. The first-stage rotary element includes a plurality of steel balls. The outer side wall of the first-stage star gear shaft has an outer raceway adapted to the steel balls, and the inner side wall of the first-stage planetary gear has an inner raceway adapted to the steel balls. The outer raceway and the inner raceway are both of annular groove structure and are coaxially arranged with the first-stage planetary gear and the first-stage star gear shaft. The steel balls are movably arranged in the space enclosed by the inner raceway and the outer raceway. The groove depth of the inner raceway is 1.5‰ - 2‰ of the maximum diameter of the circle formed by the bottom surface of the groove. The first-stage sun gear is connected to the input end of the speed increasing transmission unit, and the output end of the speed increasing transmission unit is connected to the output shaft.

[0020] In the wind power generation speed-increasing planetary gearbox of the present invention, power is transmitted from the input shaft to the first-stage planetary gear frame, the first-stage planetary gear frame drives the first-stage planetary gear to rotate, the first-stage planetary gear cooperates with the first-stage ring gear, and then drives the first-stage sun gear to rotate, and the first-stage sun gear continues to smoothly transmit power to the output shaft through the speed-increasing transmission unit, thereby achieving speed increase while transmitting power. It should be emphasized that in the first-stage transmission mechanism of the present invention, a first-stage rotating element is arranged between the first-stage star wheel shaft and the first-stage planetary wheel, and the first-stage rotating element includes a plurality of steel balls. The outer wall of the first-stage star wheel shaft has an outer raceway matched with the steel balls, and the inner wall of the first-stage planetary wheel has an inner raceway matched with the steel balls. The steel balls roll and slide in the inner raceway and the outer raceway. Compared with the structure of bearings used in the prior art, the number of steel balls loaded is increased, thereby greatly improving the carrying capacity of the first-stage rotating element and realizing large-load and high-efficiency transmission; and the single-head assembly of the first-stage star wheel shaft is anti-slip, which naturally realizes axial positioning and avoids friction on the end faces of the first-stage planetary wheels; at the same time, the structure of the first transmission mechanism is simplified, which is conducive to simplifying the overall structure of the wind power generation speed-increasing planetary gearbox, reducing its volume and weight, and thereby improving the installation convenience of the speed-increasing planetary gearbox and improving the adaptability of the speed-increasing planetary gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of the wind power generation speed increasing planetary gearbox of the present invention;

[0023] Figure 2 It is a partial structural schematic diagram of the wind power generation speed increasing planetary gearbox of the present invention;

[0024] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0025] Figure 4 for Figure 1 The enlarged schematic diagram of point B in the middle;

[0026] Figure 5 for Figure 1 Enlarged schematic diagram of point C in the middle.

[0027] Among them, 1 is the first-stage star wheel carrier, 2 is the first-stage star wheel shaft, 3 is the first-stage planet gear, 4 is the first-stage ring gear, 5 is the first-stage sun gear, 6 is the first-stage rotating element, 7 is the second-stage star wheel carrier, 8 is the second-stage star wheel shaft, 9 is the second-stage planet gear, 10 is the second-stage ring gear, 11 is the second-stage sun gear, 12 is the second-stage rotating element, 13 is the third-stage star wheel carrier, 14 is the third-stage star wheel shaft, 15 is the third-stage planet gear, 16 is the third-stage ring gear, 17 is the third-stage sun gear, 18 is the third-stage rotating element, 19 is the front end plate, 20 is the intermediate housing, 21 is the end cover, 22 is the input shaft, 23 is the output shaft, 24 is the isolation bearing, 25 is the main support rotating element, and 26 is the mounting point. Detailed implementation mode

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] The purpose of the present invention is to provide a wind power speed-increasing planetary gearbox to solve the problems existing in the above-mentioned prior art, simplify the structure of the wind power speed-increasing planetary gearbox, reduce its volume and weight, and improve the installation convenience of the speed-increasing planetary gearbox.

[0030] To make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation modes.

[0031] The present invention provides a wind power speed-increasing planetary gearbox, including a box body unit, a first-stage transmission mechanism, and a speed-increasing transmission unit. Among them, the box body unit includes a box body shell, an input shaft 22, and an output shaft 23; the first-stage transmission mechanism includes a first-stage star wheel carrier 1, a first-stage star wheel shaft 2, a first-stage planet gear 3, a first-stage ring gear 4, and a first-stage sun gear 5. For details, see Figure 1The first-stage planetary gear frame 1 is connected to the input shaft 22, one end of the first-stage planetary gear shaft 2 is connected to the first-stage planetary gear frame 1, and the other end is suspended, the first-stage planetary gear 3 is rotatably mounted on the first-stage planetary gear shaft 2, the first-stage ring gear 4 and the first-stage sun gear 5 are both meshed with the first-stage planetary gear 3, the first-stage ring gear 4 is connected to the housing, and the first-stage sun gear 5 is coaxially arranged with the first-stage planetary gear frame 1; a first-stage rotating element 6 is arranged between the first-stage planetary gear shaft 2 and the first-stage planetary gear 3, and the first-stage rotating element 6 includes a plurality of steel balls, and the first-stage planetary gear shaft 2 is provided with a plurality of steel balls. The outer wall has an outer raceway that matches the steel ball, and the inner wall of the first-stage planetary gear 3 has an inner raceway that matches the steel ball. Both the outer raceway and the inner raceway are annular groove structures and are coaxially arranged with the first-stage planetary gear 3 and the first-stage star wheel shaft 2. The steel ball is movably arranged in the space surrounded by the inner raceway and the outer raceway; the inner raceway is a shallow groove structure, and the groove depth of the inner raceway is 1.5‰~2‰ of the maximum diameter of the ring surrounded by the groove bottom surface; the first-stage sun gear 5 is connected to the input end of the speed-increasing transmission unit, and the output end of the speed-increasing transmission unit is connected to the output shaft 23.

[0032] In the wind power generation speed-increasing planetary gearbox of the present invention, power is transmitted from the input shaft 22 to the first-stage planetary gear frame 1, the first-stage planetary gear frame 1 drives the first-stage planetary gear 3 to rotate, the first-stage planetary gear 3 cooperates with the first-stage ring gear 4, and then drives the first-stage sun gear 5 to rotate, and the first-stage sun gear 5 continues to smoothly transmit power to the output shaft 23 through the speed-increasing transmission unit, thereby achieving speed increase while transmitting power. It should be emphasized that in the first-stage transmission mechanism of the present invention, a first-stage rotating element 6 is arranged between the first-stage star wheel shaft 2 and the first-stage planetary wheel 3, and the first-stage rotating element 6 includes a plurality of steel balls. The outer wall of the first-stage star wheel shaft 2 has an outer raceway matched with the steel balls, and the inner wall of the first-stage planetary wheel 3 has an inner raceway matched with the steel balls. The steel balls roll and slide in the inner raceway and the outer raceway. Compared with the structure of bearings used in the prior art, the number of steel balls loaded is increased, thereby greatly improving the carrying capacity of the first-stage rotating element 6 and realizing large-load and high-efficiency transmission; and the single-head assembly of the first-stage star wheel shaft 2 is anti-slip, which naturally realizes axial positioning and avoids end face friction of the first-stage planetary wheel 3; at the same time, the structure of the first transmission mechanism is simplified, which is conducive to simplifying the overall structure of the wind power generation speed-increasing planetary gearbox, reducing its volume and weight, and thereby improving the installation convenience of the speed-increasing planetary gearbox and improving the adaptability of the speed-increasing planetary gearbox.

[0033] It should be noted that the inner raceway is a shallow groove structure, and the groove depth of the inner raceway is 1.5‰ - 2‰ of the maximum diameter of the ring formed by the groove bottom surface. Here, it needs to be explained that the diameter of the ring formed by the groove bottom surface of the inner raceway is related to the inner diameter of the first-stage planet gear 3. During the assembly process of the steel balls, the method of external heating and internal cooling can be used to sequentially assemble the steel balls and the first-stage planet gear 3 onto the first-stage star gear shaft 2. One end of the first-stage planet gear 3 is aligned with the rightmost end face of the first-stage star gear shaft 2, and there is a safety gap between the other end and the right end face of the first-stage star gear carrier 1. The external gear part of the first-stage planet gear 3 is aligned with the internal teeth of the first-stage gear ring 4, and the two achieve good meshing.

[0034] To further improve the sliding smoothness between the first-stage star gear shaft 2 and the first-stage planet gear 3, the number of the first-stage rotary elements 6 is multiple groups, and all the rotary elements are arranged along the axis direction of the first-stage star gear shaft 2. The outer raceway and the inner raceway correspond to the first-stage rotary elements 6 one by one.

[0035] Correspondingly, a main support rotary element 25 is also arranged between the first-stage star gear carrier 1 and the first-stage gear ring 4 to improve the relative rotation reliability between the first-stage star gear carrier 1 and the first-stage gear ring 4. Specifically, the structure of the main support rotary element 25 is the same as that of the first-stage rotary element 6, and also includes multiple steel balls. The first-stage star gear carrier 1 and the first-stage gear ring 4 have raceways adapted to the steel balls, and both the first-stage star gear carrier 1 and the first-stage gear ring 4 are respectively in two-point contact with each steel ball, so that the first-stage star gear carrier 1, the first-stage gear ring 4 and the main support rotary element 25 construct the structure of a four-point contact ball bearing to bear radial loads and bidirectional axial loads, and improve the load-bearing capacity of the speed-increasing planetary gearbox. Specifically, the first-stage gear ring 4 has a filling hole, and steel balls can be added between the first-stage star gear carrier 1 and the first-stage gear ring 4 by using the filling hole. The filling hole can be set to correspond to the main support rotary element 25 one by one, or multiple filling holes correspond to each group of main support rotary elements 25.

[0036] In this specific embodiment, the first-stage star gear carrier 1 has a star gear shaft hole adapted to the first-stage star gear shaft 2. The star gear shaft hole is a stepped hole, and the first-stage star gear shaft 2 has a protruding section with a diameter larger than the star gear shaft hole, so that the first-stage star gear shaft 2 and the star gear shaft hole achieve an interference fit; during the assembly process, the first-stage star gear carrier 1 can be heated, and at the same time, the first-stage star gear shaft 2 is cooled by liquid nitrogen, and the interference fit is achieved after rapid assembly, eliminating the risk that the first-stage star gear shaft 2 is easily disengaged when fixed at one end.

[0037] In practical applications, the star gear shaft holes correspond to the first-stage star gear shafts 2 one by one, and the star gear shaft holes are circumferentially evenly distributed around the axis of the first-stage star gear carrier 1, improving the running stability of the first-stage transmission mechanism.

[0038] Specifically, the speed increasing transmission unit includes a second-stage transmission mechanism. The second-stage transmission mechanism includes a second-stage star wheel carrier 7, a second-stage star wheel shaft 8, second-stage planet gears 9, a second-stage ring gear 10, and a second-stage sun gear 11. The first-stage sun gear 5 is connected to the second-stage star wheel carrier 7. The second-stage star wheel shaft 8 is connected to the second-stage star wheel carrier 7. The second-stage planet gears 9 are rotatably sleeved on the second-stage star wheel shafts 8. Both the second-stage ring gear 10 and the second-stage sun gear 11 are meshed with the second-stage planet gears 9. The second-stage ring gear 10 is connected to the housing shell. The second-stage sun gear 11 is coaxially arranged with the second-stage star wheel carrier 7. A second-stage rotary element 12 is arranged between the second-stage star wheel shaft 8 and the second-stage planet gears 9. The second-stage rotary element 12 has the same structure as the first-stage rotary element 6. Both the second-stage star wheel shaft 8 and the second-stage planet gears 9 have raceways adapted to the second-stage rotary element 12. After the first-stage star wheel carrier 1 transmits power to the first-stage sun gear 5, the first-stage sun gear 5 continues to transmit torque to the second-stage star wheel carrier 7 to complete the multi-stage transmission of power. The structure of the second-stage transmission mechanism is similar to that of the first-stage transmission mechanism.

[0039] To ensure the smooth transmission of power, the first-stage sun gear 5 has a stepped structure. The first-stage sun gear 5 is connected to the second-stage star wheel carrier 7 by a spline connection and also bolted. The right side section of the first-stage sun gear 5 has an external spline, which is meshed and assembled with the internal spline on the inner peripheral surface of the central hole of the second-stage star wheel carrier 7. Coupled with the fastening of multiple groups of bolts, a firm assembly relationship is formed between the two to ensure the smooth transmission of torque.

[0040] More specifically, the speed increasing drive unit further includes a third-stage transmission mechanism, which includes a third-stage star wheel carrier 13, a third-stage star wheel shaft 14, a third-stage planet gear 15, a third-stage ring gear 16, and a third-stage sun gear 17. The second-stage sun gear 11 is connected to the third-stage star wheel carrier 13. The third-stage star wheel shaft 14 is connected to the third-stage star wheel carrier 13. The third-stage planet gear 15 is rotatably sleeved on the third-stage star wheel shaft 14. Both the third-stage ring gear 16 and the third-stage sun gear 17 are meshed with the third-stage planet gear 15. The third-stage ring gear 16 is connected to the box housing. The third-stage sun gear 17 is coaxially arranged with the third-stage star wheel carrier 13. A third-stage rotary element 18 is arranged between the third-stage star wheel shaft 14 and the third-stage planet gear 15. The third-stage rotary element 18 has the same structure as the first-stage rotary element 6, and both the third-stage star wheel shaft 14 and the third-stage planet gear 15 have raceways adapted to the third-stage rotary element 18. The third-stage sun gear 17 is in transmission connection with the output shaft 23. In the wind power generation speed increasing planetary gearbox of the present invention, three-stage gear speed increasing is adopted. The structure of the third-stage transmission mechanism is similar to that of the first-stage transmission mechanism, which will not be elaborated here. The second-stage transmission mechanism is provided with a second-stage rotary element 12. Correspondingly, the third-stage transmission mechanism is provided with a third-stage rotary element 18. Both the second-stage rotary element 12 and the third-stage rotary element 18 adopt the same structural form of steel balls as the first-stage rotary element 6, realizing the maximum diameter structure of the star wheel shafts at all levels, which is beneficial to improving the transmission ratio of the wind power generation speed increasing planetary gearbox.

[0041] Similar to the connection manner between the first-stage sun gear 5 and the second-stage star wheel carrier 7, the second-stage sun gear 11 is a stepped structure. The second-stage sun gear 11 and the third-stage star wheel carrier 13 also adopt spline connection and are bolted at the same time, improving the load-bearing capacity of each stage of the transmission mechanism and ensuring the smooth transmission of power.

[0042] Furthermore, rolling elements are arranged between the first-stage sun gear 5 and the first-stage star wheel carrier 1, and between the first-stage sun gear 5 and the second-stage sun gear 11 to form an isolation bearing 24, realizing the radial support of the second-stage star wheel carrier 7 and the third-stage star wheel carrier 13, and at the same time being able to avoid axial end-play friction, improving the operation safety factor of the wind power generation speed increasing planetary gearbox.

[0043] Furthermore, the first-stage sun gear 5, the second-stage sun gear 11, and the third-stage sun gear 17 are all hollow structures. The input shaft 22 passes through the first-stage sun gear 5, the second-stage sun gear 11, and the third-stage sun gear 17 and is connected to the first-stage planet carrier 1. The third-stage sun gear 17 includes a main body section and a parallel transmission gear. The main body section rotatably passes through the second-stage sun gear 11 and the first-stage sun gear 5 and is rotatably connected to the first-stage planet carrier 1. Ball bearings are provided between the main body section and the first-stage planet carrier 1, the first-stage sun gear 5, the second-stage sun gear 11, and the housing shell. The parallel transmission gear is coaxially connected to the main body section and meshes with the output shaft 23. The structure of the ball bearings is the same as that of steel balls, and the main body section, the first-stage planet carrier 1, the first-stage sun gear 5, the second-stage sun gear 11, and the housing shell all have raceways adapted to the ball bearings. In this specific embodiment, the third-stage sun gear 17 includes two parts. Raceways adapted to the ball bearings are respectively provided at both ends of the main body section and on the left side of the parallel transmission gear, which is convenient for assembly. The parallel transmission gear and the output shaft 23 achieve parallel transmission to complete the output of torque.

[0044] In addition, the housing shell includes a front end plate 19, an intermediate housing 20, and an end cover 21. The front end plate 19 is connected to the intermediate housing 20 by the first-stage ring gear 4. The first-stage planet carrier 1 is rotatably connected to the front end plate 19, and a sealing element is provided between them to achieve sealing. The end cover 21 is connected to the side of the intermediate housing 20 away from the first-stage ring gear 4. The second-stage ring gear 10 and the third-stage ring gear 16 are both connected to the intermediate housing 20. The input shaft 22 and the output shaft 23 both rotatably pass through the end cover 21 and extend into the housing shell. The output shaft 23 and the output shaft 23 are both located on the same side of the housing shell, which is convenient for installation and further improves the adaptability of the wind power generation speed increasing planetary gearbox. It should also be noted here that in other specific embodiments of the present invention, an elastic support is further provided on the intermediate housing 20 as an installation point 26 for connecting the speed increasing planetary gearbox to other structures of the wind power generation equipment, providing convenient conditions for the installation and positioning of the speed increasing planetary gearbox. The number and distribution of the installation points 26 can be adjusted and determined according to specific working conditions.

[0045] The wind power speed-increasing planetary gearbox of the present invention changes the double-plate star wheel carrier in the prior art to a single-plate structure star wheel carrier, and at the same time realizes the single-head anti-disengagement of the star wheel carrier. On the basis of simplifying the device structure, the smooth operation of the equipment is ensured; at the same time, the inner raceways of each stage of planetary gears are processed into shallow groove structures, which can realize full-ball hot installation, doubling the filling quantity of steel balls, thereby greatly improving the bearing capacity of the ball bearings constructed by the steel balls, realizing high-load and high-efficiency transmission, and naturally realizing axial positioning, avoiding the end face friction of each stage of planetary gears; in addition, isolation bearings 24 at a 90° angle are added between each stage of transmission mechanisms, realizing the radial support of the combination of the second-stage star wheel carrier 7 and the third-stage star wheel carrier 13, and eliminating the axial crosstalk friction of the combination of the second-stage star wheel carrier 7 and the third-stage star wheel carrier 13, making the operation safer. The wind power speed-increasing planetary gearbox of the present invention adopts the method of fixing one end of the star wheel shaft with a single head and leaving the other end suspended, thereby fully simplifying the structure of the speed-increasing gearbox, greatly reducing the volume and weight, and further reducing the manufacturing cost and the difficulty of field installation.

[0046] Specific examples are used in the present invention to elaborate on the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A wind power generation speed increasing planetary gearbox, characterized in that: include: A box unit, the box unit comprising a box shell, an input shaft and an output shaft; The first-stage transmission mechanism comprises a first-stage planetary gear carrier, a first-stage planetary gear shaft, a first-stage planetary gear, a first-stage ring gear and a first-stage sun gear, wherein the first-stage planetary gear carrier is connected to the input shaft, one end of the first-stage planetary gear shaft is connected to the first-stage planetary gear carrier, and the other end is suspended, the first-stage planetary gear is rotatably mounted on the first-stage planetary gear shaft, the first-stage ring gear and the first-stage sun gear are both meshed with the first-stage planetary gear, the first-stage ring gear is connected to the housing, and the first-stage sun gear is coaxially arranged with the first-stage planetary gear carrier; the first-stage A first-stage rotating element is arranged between the star wheel shaft and the first-stage planetary wheel, the first-stage rotating element comprises a plurality of steel balls, the outer side wall of the first-stage star wheel shaft comprises an outer raceway adapted to the steel balls, the inner side wall of the first-stage planetary wheel comprises an inner raceway adapted to the steel balls, the outer raceway and the inner raceway are both annular groove structures, and are arranged coaxially with the first-stage planetary wheel and the first-stage star wheel shaft, the steel balls are movably arranged in the space enclosed by the inner raceway and the outer raceway; the groove depth of the inner raceway is 1.5‰ to 2‰ of the maximum diameter of the ring enclosed by the groove bottom surface; A speed-increasing transmission unit, wherein the first-stage sun gear is connected to an input end of the speed-increasing transmission unit, and an output end of the speed-increasing transmission unit is connected to the output shaft; The speed increasing transmission unit comprises a second-stage transmission mechanism, the second-stage transmission mechanism comprises a second-stage planetary gear carrier, a second-stage planetary gear shaft, a second-stage planetary gear, a second-stage ring gear and a second-stage sun gear, the first-stage sun gear is connected to the second-stage planetary gear carrier, the second-stage planetary gear shaft is connected to the second-stage planetary gear carrier, the second-stage planetary gear is rotatably mounted on the second-stage planetary gear shaft, the second-stage ring gear and the second-stage sun gear are both meshed with the second-stage planetary gear, the second-stage ring gear is connected to the housing, and the second-stage sun gear is coaxially arranged with the second-stage planetary gear carrier; a second-stage rotating element is arranged between the second-stage planetary gear shaft and the second-stage planetary gear, the second-stage rotating element has the same structure as the first-stage rotating element, and the second-stage planetary gear shaft and the second-stage planetary gear both have a raceway adapted to the second-stage rotating element; The speed increasing transmission unit also includes a third-stage transmission mechanism, and the third-stage transmission mechanism includes a third-stage star wheel carrier, a third-stage star wheel shaft, a third-stage planetary gear, a third-stage ring gear and a third-stage sun gear, the second-stage sun gear is connected to the third-stage star wheel carrier, the third-stage star wheel shaft is connected to the third-stage star wheel carrier, the third-stage planetary gear is rotatably mounted on the third-stage star wheel shaft, the third-stage ring gear and the third-stage sun gear are both meshed with the third-stage planetary gears, the third-stage ring gear is connected to the casing shell, and the third-stage sun gear is coaxially arranged with the third-stage star wheel carrier; a third-stage rotating element is arranged between the third-stage star wheel shaft and the third-stage planetary gear, the third-stage rotating element has the same structure as the first-stage rotating element, and the third-stage star wheel shaft and the third-stage planetary gear both have a raceway adapted to the third-stage rotating element; the third-stage sun gear is transmission-connected to the output shaft; Rolling bodies are arranged between the first-stage sun gear and the first-stage star gear carrier, and between the first-stage sun gear and the second-stage sun gear to form isolation bearings; The first-stage sun gear, the second-stage sun gear and the third-stage sun gear are all hollow structures, the input shaft is connected to the first-stage star gear frame after passing through the first-stage sun gear, the second-stage sun gear and the third-stage sun gear, the third-stage sun gear includes a main body section and a parallel transmission gear, the main body section is rotatably connected to the first-stage star gear frame after passing through the second-stage sun gear and the first-stage sun gear, balls are arranged between the main body section and the first-stage star gear frame, the first-stage sun gear, the second-stage sun gear and the casing shell, the parallel transmission gear is coaxially connected to the main body section, and the parallel transmission gear is meshed with the output shaft; the structure of the ball is the same as that of the steel ball, and the main body section, the first-stage star gear frame, the first-stage sun gear, the second-stage sun gear and the casing shell all have raceways adapted to the ball.

2. The wind power generation speed increasing planetary gearbox according to claim 1, characterized in that: The number of the first-stage rotating elements is multiple groups, all of which are arranged along the axis direction of the first-stage star wheel shaft, and the outer raceway and the inner raceway correspond to the first-stage rotating elements one by one; A main supporting rotating element is arranged between the first-stage star wheel frame and the first-stage gear ring. The structure of the main supporting rotating element is the same as that of the first-stage rotating element, and also includes a plurality of the steel balls. The first-stage gear ring and the first-stage star wheel frame are respectively in contact with each of the steel balls at two points. The first-stage gear ring has a filling hole, and the steel balls can be added between the first-stage star wheel frame and the first-stage gear ring through the filling hole.

3. The wind power generation speed increasing planetary gearbox according to claim 1, characterized in that: The first-stage star wheel frame has a star wheel shaft hole adapted to the first-stage star wheel shaft, the star wheel shaft hole is a stepped hole, and the first-stage star wheel shaft and the star wheel shaft hole are interference fit; The star wheel shaft holes correspond to the first-stage star wheel shafts one by one, and the star wheel shaft holes are evenly distributed circumferentially around the axis of the first-stage star wheel frame.

4. The wind power generation speed increasing planetary gearbox according to claim 1, characterized in that: The first-stage sun gear is a stepped structure, and the first-stage sun gear and the second-stage star gear carrier are connected by tooth-shaped splines and bolts at the same time.

5. The wind power generation speed increasing planetary gearbox according to claim 1, characterized in that: The second-stage sun gear is a stepped structure, and the second-stage sun gear and the third-stage star gear carrier are connected by tooth-shaped splines and bolts at the same time.

6. The wind power generation speed increasing planetary gearbox according to any one of claims 1 to 5, characterized in that: The housing shell includes a front end plate, an intermediate housing and an end cover. The front end plate is connected to the intermediate housing by means of the first-stage gear ring. The first-stage star wheel carrier is rotatably connected to the front end plate, and a sealing element is arranged between the two. The end cover is connected to a side of the intermediate housing away from the first-stage gear ring. Both the input shaft and the output shaft can rotatably pass through the end cover and extend into the housing shell.

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