Wind power yaw speed reducer

Abstract

A wind power yaw speed reducer relates to the technical field of yaw transmission of a wind driven generator, can meet the requirement of large speed ratio of the yaw speed reducer by modifying a gear transmission structure and adopting a 2Z-X and 3Z type two-stage planetary structure, can effectively reduce the transmission stage number of planetary gears, and reduces the number, weight and overall appearance size of parts. And later maintenance is facilitated. In the wind power yaw speed reducer, a motor base and an upper machine body are connected with a lower machine body through bolts, and the lower machine body is fixed to a wind driven generator rack; the yaw speed reducer box body is fixed during working, and motor power is output to a yaw gear ring through an open gear after speed reduction and torque increase through a gear in the speed reducer.

Description

TECHNICAL FIELD

[0001] The utility model relates to wind driven generator yaw drive technology field especially relates to a wind power yaw speed reducer. BACKGROUND

[0002] At present, yaw speed reducer is the key transmission device of wind driven generator set, it is mainly used for adjusting cabin direction to align with the wind direction and obtains maximum wind energy capture efficiency, and its technical performance and reliability directly determine the fan life and power generation benefit.

[0003] In prior art, because the installation space is limited, its weight, shape size, maintainability have strict requirements, but because the yaw speed reducer's speed ratio is big, the existing speed reducer usually uses four to five levels planetary structure, so that the speed reducer part is many, weight is high, shape size is big, cost is high, and assembly and maintenance are inconvenient. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of wind power yaw speed reducers, it is through gear drive structure of modification, adopts 2Z-X plus 3Z type two-stage planetary structure, yaw speed reducer big speed ratio requirement can be realized, simultaneously can effectively reduce planetary gear transmission level number, and reduce part quantity, weight, and overall shape size, and facilitate later maintenance.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A kind of wind power yaw speed reducer, comprising: motor seat, the motor seat and upper machine body are connected by bolt with lower machine body, and the lower machine body is fixed to wind driven generator rack;Yaw speed reducer box is fixed when working, motor power is reduced by speed increasing torque by gear inside speed reducer and exported to yaw gear ring by open gear;

[0007] Connecting sleeve is fixed to the motor seat by first bearing, first stage planetary component is composed of first stage sun gear, first stage planetary gear, first stage planet carrier, first stage inner gear ring;The first stage sun gear is connected with the connecting sleeve using interference, first stage ball top is installed on the first stage sun gear, and the first stage planetary gear is installed on the first stage planet carrier;In the first stage planetary component, power is input by the first stage sun gear, and exported to second stage sun gear through the first stage planet carrier;

[0008] The second stage planetary component is composed of the second stage sun gear, the second stage planetary gear, the second stage planet carrier, the second stage inner ring gear and the inner ring gear; the second stage sun gear is connected with the first stage planet carrier through the spline, the second stage planetary gear is installed on the second stage planet carrier, and the upper part of the second stage planetary gear is engaged with the second stage inner ring gear, and the lower part of the second stage planetary gear is engaged with the inner ring gear; the second stage planet carrier is provided with a first second stage ball top and a second second stage ball top, the first second stage ball top is in contact with the upper end surface of the open gear, the second second stage ball top is in contact with the lower end surface of the second stage sun gear, the second stage sun gear is axially positioned through the first second stage ball top and the second second stage ball top, and the second stage planet carrier is axially positioned through the second second stage ball top and the first second stage ball top; in the second stage planetary component, power is input from the second stage sun gear and is output to the open gear through the inner ring gear.

[0009] In actual application, the output component is composed of the open gear, the second bearing, the third bearing, the lower body and the oil seal; the open gear is supported on the lower body through the second bearing and the third bearing, the oil seal is arranged between the second bearing and the third bearing to seal oil, the second bearing adopts oil lubrication, and the third bearing adopts grease lubrication; the inner ring gear is connected with the open gear through the spline and adopts double stop port cooperation; the inner ring gear is in contact with the upper end surface of the second bearing and is fixed on the open gear through the tightening round nut, and the play of the second bearing and the third bearing is adjusted by using the tightening round nut; in the output component, power is output from the inner ring gear to the open gear, and power is output from the open gear to the yaw gear.

[0010] Compared with the prior art, the wind power yaw speed reducer has the following advantages:

[0011] In the wind power yaw speed reducer, power is input from the motor to the yaw speed reducer, the connecting sleeve drives the first stage sun gear to rotate, power is output from the first stage planet carrier to the second stage sun gear, power is output from the inner ring gear to the open gear through the planetary gear power split, and the nacelle is driven to track wind. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The sectional structure schematic diagram of the wind power yaw speed reducer is provided.

[0013] Reference signs:

[0014] 1 - motor base; 9 - upper body; 17 - lower body; 20 - open gear;

[0015] 2 - adapter sleeve; 3 - first bearing; 4 - first stage sun gear; 5 - first stage planetary gear; 7 - first stage carrier; 9.1 - first stage inner ring; 6 - first stage ball top;

[0016] 8 - second stage sun gear; 10 - second stage planetary gear; 12 - second stage carrier; 9.2 - second stage inner ring; 15 - inner ring; 13 - first second stage ball top; 11 - second second stage ball top;

[0017] 16 - second bearing; 19 - third bearing; 18 - oil seal; 14 - tightening round nut. DETAILED DESCRIPTION

[0018] For the convenience of understanding, the wind power yaw speed reducer provided by the embodiment of the utility model is described in detail below in combination with the drawings of the specification.

[0019] The embodiment of the utility model provides a kind of wind power yaw speed reducer, as shown in Figure 1 The motor base 1 is connected with the lower body 17 by bolt and upper body 9, and the lower body 17 is fixed to the wind turbine frame. The yaw speed reducer box is fixed when working, and the motor power is output to the yaw gear ring by open gear 20 after speed reduction and torque increase by the internal gear of reducer.

[0020] The adapter sleeve 2 is fixed to the motor base 1 by the first bearing 3, and the first stage planetary component is composed of the first stage sun gear 4, the first stage planetary gear 5, the first stage carrier 6 and the first stage inner ring 9.1. The first stage sun gear 4 is connected with the adapter sleeve 2 by interference, the first stage ball top 6 is installed on the first stage sun gear 4, and the first stage planetary gear 5 is installed on the first stage carrier 7. In the first stage planetary component, the power is input by the first stage sun gear 4, and output to the second stage sun gear 8 through the first stage carrier 7.

[0021] The second-stage planetary assembly consists of a second-stage sun gear 8, second-stage planet gears 10, a second-stage planet carrier 12, a second-stage internal gear ring 9.2, and an internal gear ring 15. The second-stage sun gear 8 is connected to the first-stage planet carrier 7 via a spline. The second-stage planet gears 10 are mounted on the second-stage planet carrier 12, with the upper part of the second-stage planet gears 10 meshing with the second-stage internal gear ring 9.2, and the lower part of the second-stage planet gears 10 meshing with the internal gear ring 15. The second-stage planet carrier 12 is equipped with first and second-stage dome 13 and a second-stage dome 15. The second stage spherical dome 11 is in contact with the upper end face of the open gear 20, and the second stage spherical dome 11 is in contact with the lower end face of the second stage sun gear 8. At the same time, the second stage sun gear 8 is axially positioned through the first stage spherical dome 6 and the second stage spherical dome 11. The second stage planetary carrier 12 is axially positioned through the second stage spherical dome 11 and the first stage spherical dome 13. In the second stage planetary component, power is input from the second stage sun gear 8 and output to the open gear 20 through the internal gear ring 15.

[0022] Compared with the prior art, the wind power yaw reducer described in this embodiment of the utility model has the following advantages:

[0023] In the wind turbine yaw reducer provided in this embodiment, since the power is input from the motor to the yaw reducer, the connecting sleeve drives the first-stage sun gear to rotate, and the first-stage planetary carrier outputs the power to the second-stage sun gear. At the same time, through the power splitting of the planetary gear system, the power is output from the internal gear ring to the open gear to drive the nacelle to track the wind. Therefore, the wind turbine yaw reducer provided in this embodiment utilizes the large speed ratio of the 3Z-type planetary structure to modify the existing four- to five-stage planetary transmission into a two-stage planetary transmission, thereby effectively reducing the number of parts, reducing weight and overall size, and facilitating later maintenance.

[0024] In practical applications, such as Figure 1 As shown, the output component can be composed of an open gear 20, a second bearing 16, a third bearing 19, a lower body 17, and an oil seal 18. The open gear 20 can be supported on the lower body 17 by the second bearing 16 and the third bearing 19, and the oil seal 18 can be placed between the second bearing 16 and the third bearing 19 for oil sealing. The second bearing 16 can be lubricated with oil, and the third bearing 19 can be lubricated with grease. The internal gear ring 15 and the open gear 20 can be connected by a spline and use a double stop fit. The internal gear ring 15 contacts the upper end face of the second bearing 16, and the internal gear ring 15 can be fixed to the open gear 20 by tightening the round nut 14. At the same time, the clearance between the second bearing 16 and the third bearing 19 can be adjusted by tightening the round nut 14. In the output component, the power is output from the internal gear ring 15 to the open gear 20, and then output to the yaw gear ring via the open gear 20.

[0025] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A wind turbine yaw reducer, characterized in that, include: The motor base and the upper body are connected to the lower body by bolts, and the lower body is fixed to the wind turbine frame; the yaw reducer housing is fixed during operation, and the motor power is reduced and increased in torque through the internal gears of the reducer and then output to the yaw gear ring through the open gear. The sleeve is fixed to the motor base by a first bearing. The first-stage planetary component consists of a first-stage sun gear, a first-stage planetary gear, a first-stage planetary carrier, and a first-stage internal gear ring. The first-stage sun gear and the sleeve are connected by an interference fit. The first-stage dome is mounted on the first-stage sun gear, and the first-stage planetary gear is mounted on the first-stage planetary carrier. In the first-stage planetary component, power is input from the first-stage sun gear and output to the second-stage sun gear via the first-stage planet carrier; The second-stage planetary component consists of a second-stage sun gear, second-stage planet gears, a second-stage planet carrier, a second-stage internal gear ring, and an internal gear ring. The second-stage sun gear is connected to the first-stage planet carrier via a spline. The second-stage planet gears are mounted on the second-stage planet carrier, and the upper part of the second-stage planet gears meshes with the second-stage internal gear ring, while the lower part of the second-stage planet gears meshes with the internal gear ring. The second-stage planetary carrier is equipped with a first-stage second-stage dome and a second-stage second-stage dome. The first-stage second-stage dome contacts the upper end face of the open gear, and the second-stage second-stage dome contacts the lower end face of the second-stage sun gear. Simultaneously, the second-stage sun gear is axially positioned through the first-stage dome and the second-stage second-stage dome, and the second-stage planetary carrier is axially positioned through the second-stage second-stage dome and the first-stage second-stage dome. In the second-stage planetary component, power is input from the second-stage sun gear and output to the open gear via the internal gear ring.

2. The wind turbine yaw reducer according to claim 1, characterized in that, The output component consists of the open gear, a second bearing, a third bearing, the lower housing, and an oil seal. The open gear is supported on the lower housing by the second and third bearings, and the oil seal is placed between the second and third bearings to seal the oil. The second bearing is lubricated with oil, and the third bearing is lubricated with grease. The internal gear ring is connected to the open gear via a spline and uses a double stop fit. The internal gear ring contacts the upper end face of the second bearing and is fixed to the open gear by a tightening nut. The tightening nut is used to adjust the clearance between the second and third bearings. In the output component, power is output from the internal gear ring to the open gear, and then from the open gear to the yaw gear ring.

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