Planetary reducer for wind generating set

Abstract

The planetary reducer for the wind generating set comprises a shell, an output sun gear is arranged on the side, away from a small umbrella gear, in the shell, a first sun gear is arranged on the side, close to the small umbrella gear, of the output sun gear, and a second sun gear is arranged on the side, away from the output sun gear, of the first sun gear. The second sun gear is provided with a large umbrella gear matched with the small umbrella gear, a first planet shaft is arranged on the outer side of the second sun gear, a first planet gear is arranged on the outer side of the first single-arm planet carrier, a second planet shaft is arranged on the side, close to the output sun gear, of the first planet shaft, and a second planet gear is arranged on the outer side of the second single-arm planet carrier. The single-arm planet carrier structure of the planetary reducer is compact in structure, the output planet carrier is of a double-end supporting structure, it is guaranteed that the output shaft and the bearing can bear radial force generated by large torsion, the input end servo flange and the small bevel gear are connected and matched through the shaft hole, and the structure is compact.

Description

Technical Field

[0001] This utility model relates to the field of planetary gear reducer technology, and in particular to a planetary gear reducer for wind turbine generator sets. Background Technology

[0002] Specialized lifting tools are required when installing wind turbine blades. A key component of the lifting tool structure is the planetary gearbox. When installing the next blade after the first one is installed, the gearbox needs to drive the turbine head to rotate. Although positive pressure pneumatic conveying can achieve rapid conveying, existing gearboxes have a large torque on the output pinion of the gearbox shaft due to the weight of the wind turbine blades and the uncertainty of the site environment. Furthermore, when installed at high altitudes, traditional gearboxes are bulky, making installation inconvenient and maintenance costs high. Therefore, we propose a planetary gearbox for wind turbines. Utility Model Content

[0003] To address the aforementioned problems, this invention provides a planetary gearbox for wind turbine generator sets. This invention solves the problems of existing gearboxes where, due to the weight of the wind turbine blades and the uncertainties of the on-site environment, the output pinion of the gearbox shaft bears a large torque, and when installed at high altitudes, traditional gearboxes are bulky, inconvenient to install, and have high maintenance costs.

[0004] This utility model discloses a planetary gear reducer for wind turbine generator sets, comprising a housing, an outer servo flange at the upper end of one side of the housing, an inner servo flange inside the outer servo flange, an input shaft inside the inner servo flange, one end of the input shaft being fixedly connected to a small parachute wheel inside the housing, an output sun gear inside the housing away from the small parachute wheel, a first sun gear on the side of the output sun gear close to the small parachute wheel, a second sun gear on the side of the first sun gear away from the output sun gear, a large parachute wheel matching the small parachute wheel on the second sun gear, a first planetary shaft outside the second sun gear, a first single-arm planetary carrier outside the first planetary shaft, a first planetary gear outside the first single-arm planetary carrier, a second planetary shaft on the side of the first planetary shaft close to the output sun gear, a second single-arm planetary carrier outside the second planetary shaft, a second planetary gear outside the second single-arm planetary carrier, and a double gear ring on the outside of the first and second planetary gears.

[0005] In the above scheme, an output planetary shaft is provided outside the output sun gear, an output planet carrier is provided outside the output planetary shaft, an output planet gear is provided outside the output planet carrier, and an output gear ring is provided outside the output planet gear.

[0006] In the above scheme, the output sun gear is provided with an output shaft on the side away from the first sun gear, and an output pinion is provided on the outside of the output shaft.

[0007] In the above scheme, an oil cavity is provided between the outer servo flange and the inner servo flange, and a lubricating oil hole is provided on the housing.

[0008] In the above scheme, the upper end of the shell is provided with an extended vent cap.

[0009] In the above scheme, the output planetary carrier is supported by two arms, and the outer end of the output pinion is provided with a bearing support step.

[0010] In the above scheme, the first planetary shaft and the second planetary shaft are both made of 20CrMnTi carbon steel, and the output sun gear, the first sun gear, the second sun gear, the first planetary gear, the second planetary gear, and the output planetary gear are all made of high-strength alloy structural steel 20CrNiMo2A.

[0011] The advantages and beneficial effects of this utility model are as follows: This utility model provides a planetary gear reducer for wind turbine generator sets. The input of the servo motor is connected to the internal servo flange, and the transmission is direct-orthogonal via a small parapet wheel and a large parapet wheel. The shaft of the large parapet wheel is connected to the second sun gear via an internal spline. The second sun gear, the first planetary gear, and the double-gear ring form a first-stage planetary gear set, which transmits power to the first sun gear through a second single-arm planetary carrier. The first sun gear, the second planetary gear, and the double-gear ring form a second-stage planetary gear set, which transmits power to the output sun gear through the second single-arm planetary carrier. The output sun gear, the output planetary gear, and the output gear ring form a third-stage planetary gear set, which transmits power to the output pinion through the output planetary carrier, thus achieving the speed reduction transmission of the reducer. This type of planetary gear reducer has a compact single-arm planetary carrier structure, is easy to manufacture, and the output planetary carrier adopts a double-end support structure to ensure that the output shaft and bearings can withstand the radial force generated by high torque. The servo flange at the input end is connected to the small parapet wheel via a shaft-hole connection, resulting in a small axial dimension and a compact structure. Attached Figure Description

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] Figure 1 This is a cross-sectional schematic diagram of the present invention.

[0014] In the diagram: 1. Housing; 2. Outer servo flange; 3. Inner servo flange; 4. Small umbrella wheel; 5. Output sun gear; 6. First sun gear; 7. Second sun gear; 8. Large umbrella wheel; 9. First planetary shaft; 10. First single-arm planetary carrier; 11. First planetary gear; 12. Second planetary shaft; 13. Second single-arm planetary carrier; 14. Second planetary gear; 15. Double gear ring; 16. Output planetary shaft; 17. Output planetary carrier; 18. Output planetary gear; 19. Output gear ring; 20. Oil chamber; 21. Lubricating oil hole; 22. Extended vent cap; 23. Output shaft; 24. Output pinion; 25. Input shaft. Detailed Implementation

[0015] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0016] like Figure 1 As shown, this utility model is a planetary gear reducer for wind turbine generator sets, including a housing 1. An outer servo flange 2 is provided on the upper end of one side of the housing 1. An inner servo flange 3 is provided inside the outer servo flange 2. An input shaft 25 is provided inside the inner servo flange 3. One end of the input shaft 25 located inside the housing 1 is fixedly connected to a small parapet wheel 4. An output sun gear 5 is provided on the side of the housing 1 away from the small parapet wheel 4. A first sun gear 6 is provided on the side of the output sun gear 5 close to the small parapet wheel 4. A second sun gear 7 is provided on the side of the first sun gear 6 away from the output sun gear 5. A large parapet wheel 8 matching the small parapet wheel 4 is provided on the second sun gear 7. The large parapet wheel shaft 8 and the second sun gear 7 are connected by a... The system features an internal spline connection, with the small parachute wheel 4 and the large parachute wheel 8 meshing with each other. A first planetary shaft 9 is located outside the second sun gear 7, and a first single-arm planet carrier 10 is located outside the first planetary shaft 9. A first planetary gear 11 is located outside the first single-arm planet carrier 10. A second planetary shaft 12 is located on the side of the first planetary shaft 9 closest to the output sun gear 5. A second single-arm planet carrier 13 is located outside the second planetary shaft 12, and a second planetary gear 14 is located outside the second single-arm planet carrier 13. A double gear ring 15 is located outside the first planetary gear 11 and the second planetary gear 14, and both the first planetary gear 11 and the second planetary gear 14 mesh with the inner ring gear of the double gear ring 15.

[0017] An output planetary shaft 16 is provided on the outer side of the output sun gear 5, an output planetary carrier 17 is provided on the outer side of the output planetary shaft 16, an output planetary gear 18 is provided on the outer side of the output planetary carrier 17, and an output gear ring 19 is provided on the outer side of the output planetary gear 18.

[0018] The output sun gear 5 is provided with an output shaft 23 on the side away from the first sun gear 6, and an output pinion 24 is provided on the outside of the output shaft 23.

[0019] An oil cavity 20 is provided between the outer servo flange 2 and the inner servo flange 3, and a lubricating oil hole 21 is provided on the housing 1.

[0020] The upper end of the housing 1 is provided with an extended vent cap 22.

[0021] The output planetary carrier 17 is supported by two arms, and the outer end of the output pinion 24 is provided with a bearing support step.

[0022] Both the first planetary shaft 9 and the second planetary shaft 12 are made of 20CrMnTi carbon steel. Both the first planetary shaft 9 and the second planetary shaft 12 are carburized and quenched, and externally ground to ensure accuracy and fatigue strength. The output sun gear 5, the first sun gear 6, the second sun gear 7, the first planetary gear 11, the second planetary gear 14 and the output planetary gear 18 are made of high-strength alloy structural steel 20CrNiMo2A. The output sun gear 5, the first sun gear 6, the second sun gear 7, the first planetary gear 11, the second planetary gear 14 and the output planetary gear 18 are all carburized and quenched twice, and the gear grinding meets the accuracy requirements of grade 6 or above.

[0023] Specifically, in the utility model, the inner servo flange 3 is connected to the servo motor input, which is directly driven by the small parachute wheel 4 and the large parachute wheel 8. The large parachute wheel shaft 8 is connected to the second sun gear 7 through an internal spline. The second sun gear 7, the first planetary gear 11, and the double gear ring 15 form a first-stage planetary gear set, which is transmitted to the first sun gear 6 through the second single-arm planetary carrier 13. The first sun gear 6, the second planetary gear 14, and the double gear ring 15 form a second-stage planetary gear set, which is transmitted to the output sun gear 5 through the second single-arm planetary carrier 13. The output sun gear 5, the output planetary gear 18, and the output gear ring 19 form a third-stage planetary gear set, which is transmitted to the output pinion 24 through the output planetary carrier 17, thus realizing the speed reduction transmission of the reducer.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A planetary gearbox for wind turbine generator sets, comprising a housing (1), characterized in that, An outer servo flange (2) is provided on the upper end of one side of the housing (1). An inner servo flange (3) is provided inside the outer servo flange (2). An input shaft (25) is provided inside the inner servo flange (3). One end of the input shaft (25) is fixedly connected to the small parachute wheel (4) inside the housing (1). An output sun wheel (5) is provided on the side of the housing (1) away from the small parachute wheel (4). A first sun wheel (6) is provided on the side of the output sun wheel (5) close to the small parachute wheel (4). A second sun wheel (7) is provided on the side of the first sun wheel (6) away from the output sun wheel (5). The second sun wheel (7) is connected to the small parachute wheel (4). A matching large umbrella wheel (8) is provided. A first planetary shaft (9) is provided on the outside of the second sun wheel (7). A first single-arm planetary carrier (10) is provided on the outside of the first planetary shaft (9). A first planetary gear (11) is provided on the outside of the first single-arm planetary carrier (10). A second planetary shaft (12) is provided on the side of the first planetary shaft (9) close to the output sun wheel (5). A second single-arm planetary carrier (13) is provided on the outside of the second planetary shaft (12). A second planetary gear (14) is provided on the outside of the second single-arm planetary carrier (13). A double gear ring (15) is provided on the outside of the first planetary gear (11) and the second planetary gear (14).

2. The planetary gearbox for wind turbine generator sets according to claim 1, characterized in that, An output planetary shaft (16) is provided on the outside of the output sun gear (5), an output planetary carrier (17) is provided on the outside of the output planetary shaft (16), an output planetary gear (18) is provided on the outside of the output planetary carrier (17), and an output gear ring (19) is provided on the outside of the output planetary gear (18).

3. A planetary gearbox for a wind turbine generator set according to claim 2, characterized in that, The output sun gear (5) has an output shaft (23) on the side away from the first sun gear (6), and an output pinion (24) is provided on the outside of the output shaft (23).

4. A planetary gearbox for a wind turbine generator set according to claim 1, characterized in that, An oil cavity (20) is provided between the outer servo flange (2) and the inner servo flange (3), and a lubricating oil hole (21) is provided on the housing (1).

5. A planetary gearbox for wind turbine generator sets according to claim 1, characterized in that, The upper end of the housing (1) is provided with an extended vent cap (22).

6. A planetary gearbox for a wind turbine generator set according to claim 3, characterized in that, The output planetary carrier (17) is supported by two arms, and the outer end of the output pinion (24) is provided with a bearing support step.

7. A planetary gearbox for a wind turbine generator set according to claim 2, characterized in that, The first planetary shaft (9) and the second planetary shaft (12) are both made of 20CrMnTi carbon steel, and the output sun gear (5), the first sun gear (6), the second sun gear (7), the first planetary gear (11), the second planetary gear (14) and the output planetary gear (18) are all made of high-strength alloy structural steel 20CrNiMo2A.

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