Wind power yawing variable-pitch speed reducer adopting small tooth difference structure for transmission

Abstract

A wind power yaw variable pitch speed reducer adopting a small tooth difference structure for transmission relates to the technical field of yaw transmission of wind driven generators, and can meet the requirement of large speed ratio of the yaw speed reducer and reduce the transmission stage number of planetary gears through combination of a small tooth difference structure transmission mechanism and a planetary transmission structure, thereby effectively reducing the weight and the size of the speed reducer. And the functions of reducing cost and increasing efficiency are realized. According to the wind power yaw variable-pitch speed reducer adopting the small tooth difference structure for transmission, a yaw speed reducer box body is composed of a motor base, an upper machine body, a fixed gear ring and a lower machine body; the lower machine body is fixed on a rack of the wind generating set; the motor base and the upper machine body, the upper machine body and the fixed gear ring, and the fixed gear ring and the lower machine body are respectively connected through bolts; 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 transmission technical field especially relates to a kind of wind power yaw variable pitch speed reducer of few tooth difference structure transmission. BACKGROUND

[0002] At present, wind power yaw and variable pitch system are the core of efficient wind capture and safe operation of wind turbine generator system, and its speed reducer needs to realize high-precision, high-reliability power transmission under extreme working conditions.

[0003] Among them, the current mainstream reducer such as planetary gear, the inventor finds that there are the following defects: planetary gear transmission is easy to produce fatigue damage and transmission error due to multi-stage meshing, and has the technical problems of large size and heavy weight.

[0004] Therefore, how to provide a kind of wind power yaw variable pitch speed reducer, which can reduce the height and weight of the speed reducer, and realize the function of cost reduction and efficiency increase, has become a technical problem that technicians in the field need to solve urgently. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of wind power yaw variable pitch speed reducer of few tooth difference structure transmission, which combines few tooth difference structure transmission mechanism with planetary transmission structure, can realize the large speed ratio requirement of yaw speed reducer while reducing the number of planetary gear transmission stages, thereby effectively reducing the weight and size of the speed reducer, and realizing the function of cost reduction and efficiency increase.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A kind of wind power yaw variable pitch speed reducer of few tooth difference structure transmission, yaw speed reducer box is composed of motor base, upper machine body, fixed gear ring and lower machine body;The lower machine body is fixed to the rack of wind turbine generator set, and the motor base, the upper machine body, the fixed gear ring and the lower machine body are connected by bolts respectively;Yaw speed reducer box is fixed when working, and motor power is output to yaw gear ring by open gear after speed reduction and torque increase by internal gear of speed reducer;

[0008] Yaw speed reducer connector is fixed to the motor base by bearing, and first-stage transmission mechanism is composed of first-stage sun gear, first-stage planetary gear, first-stage bearing, first-stage planet carrier and the upper machine body;The first-stage sun gear is connected with the connector by interference, and first-stage ball top is installed on baffle, and first-stage top block is installed on the first-stage sun gear, and the first-stage planetary gear is installed on the first-stage planet carrier by the first-stage bearing;In the first-stage transmission mechanism, power is input by the first-stage sun gear, and is output to second-stage sun gear by the first-stage planet carrier;

[0009] The second stage transmission mechanism of the yaw speed reducer is composed of the second stage sun gear, the second stage planet gear, the second stage bearing, the second stage planet carrier and the upper machine body; the second stage sun gear is connected with the first stage planet carrier through a spline, and the second stage planet gear is installed on the second stage planet carrier through the second stage bearing; in the second stage transmission mechanism, power is input from the second stage sun gear and output to the eccentric transmission shaft through the second stage planet carrier.

[0010] In actual application, the small-tooth-difference transmission mechanism of the yaw speed reducer is composed of the eccentric transmission shaft, the first bearing, the bearing mounting seat, the fixed gear ring, the output gear ring, the second bearing, the third bearing, the balance block, the fourth bearing and the planet gear; the eccentric transmission shaft is connected with the second stage planet carrier through a spline, the upper half of the planet gear is engaged with the fixed gear ring through the second bearing, and the lower half of the planet gear is engaged with the output gear ring through the third bearing; the eccentric transmission shaft is installed on the bearing mounting seat and the open gear through the first bearing and the fourth bearing; in the small-tooth-difference transmission mechanism, power is input from the eccentric transmission shaft and output to the open gear through the output gear ring.

[0011] The output mechanism of the yaw speed reducer is composed of the open gear, the fifth bearing, the sixth bearing, the lower machine body, an oil seal and a round nut; the open gear is installed on the lower machine body through the fifth bearing and the sixth bearing, and the oil seal is arranged between the fifth bearing and the sixth bearing to seal oil; the fifth bearing is lubricated by grease, and the sixth bearing is lubricated by oil; the output gear ring is connected with the open gear through a spline and is matched by a stop; the output gear ring is locked on the open gear through the round nut, and the play of the fifth bearing and the sixth bearing is adjusted through the round nut; in the output mechanism, power is output from the output gear ring to the open gear, and the power is output from the open gear to the yaw gear ring.

[0012] Compared with the prior art, the yaw pitch speed reducer of the wind power with the small-tooth-difference structure transmission has the following advantages:

[0013] The wind power yaw variable pitch speed reducer adopting the small-tooth-difference structure transmission provided by the utility model has the advantages that the power is input to the yaw speed reducer by the motor, the first stage sun gear is driven to rotate by the adapter sleeve, the power is output to the second stage sun gear by the first stage planet carrier, the power is output to the eccentric transmission shaft by the second stage planet carrier, the power is output to the open gear from the output gear ring through the small-tooth-difference mechanism, and the nacelle is driven to track the wind, so that the wind power yaw variable pitch speed reducer adopting the small-tooth-difference structure transmission can realize the large speed ratio requirement of the yaw speed reducer, reduce the number of the planetary gear transmission stages, effectively reduce the weight and volume of the speed reducer, and realize the function of cost reduction and benefit increase. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The sectional structure schematic view of the wind power yaw variable pitch speed reducer adopting the small-tooth-difference structure transmission provided by the utility model embodiment is shown.

[0015] Reference signs:

[0016] 1-motor base; 14-upper machine body; 26-lower machine body; 2-adapter sleeve; 3-bearing;

[0017] 4-first stage sun gear; 7-first stage planet gear; 8-first stage bearing; 9-first stage planet carrier; 6-first stage ball top; 5-first stage top block;

[0018] 13-second stage sun gear; 10-second stage planet gear; 11-second stage bearing; 12-second stage planet carrier;

[0019] 29- eccentric transmission shaft; 16-first bearing; 15-bearing mounting seat; 17-fixed gear ring; 20-output gear ring; 18-second bearing; 19-third bearing; 21-balance block; 23-fourth bearing; 30-planet gear;

[0020] 28-open gear; 27-fifth bearing; 24-sixth bearing; 25-oil seal; 22-circular nut. DETAILED DESCRIPTION

[0021] In order to facilitate understanding, the wind power yaw variable pitch speed reducer adopting the small-tooth-difference structure transmission provided by the utility model embodiment is described in detail below in combination with the drawings of the specification.

[0022] The utility model embodiment provides a kind of wind power yaw variable pitch speed reducer adopting small-tooth-difference structure transmission, such as Figure 1As shown, the yaw reducer box is composed of a motor base 1, an upper machine body 14, a fixed gear ring 17 and a lower machine body 26; the lower machine body 26 is fixed to the frame of the wind turbine generator set, the motor base 1 is connected with the upper machine body 14, the upper machine body 14 is connected with the fixed gear ring 17, and the fixed gear ring 17 is connected with the lower machine body 26 through bolts respectively; the yaw reducer box is fixed during work, and the motor power is output to the yaw gear ring through the open gear 28 after being reduced and increased in torque by the internal gear of the reducer;

[0023] The yaw reducer connector 2 is fixed to the motor base 1 through the bearing 3, the first-stage transmission mechanism is composed of a first-stage sun gear 4, a first-stage planetary gear 7, a first-stage bearing 8, a first-stage planet carrier 9 and the upper machine body 14; the first-stage sun gear 4 is connected with the connector 2 in interference, the first-stage ball top 6 is installed on the baffle, the first-stage top block 5 is installed on the first-stage sun gear 4, and the first-stage planetary gear 7 is installed on the first-stage planet carrier 9 through the first-stage bearing 8; in the first-stage transmission mechanism, the power is input by the first-stage sun gear 4 and output to the second-stage sun gear 13 through the first-stage planet carrier 9;

[0024] The second-stage transmission mechanism of the yaw reducer is composed of the second-stage sun gear 13, a second-stage planetary gear 10, a second-stage bearing 11, a second-stage planet carrier 12 and the upper machine body 14; the second-stage sun gear 13 is connected with the first-stage planet carrier 9 through a spline, and the second-stage planetary gear 10 is installed on the second-stage planet carrier 12 through the second-stage bearing 11; in the second-stage transmission mechanism, the power is input by the second-stage sun gear 13 and output to the eccentric transmission shaft 29 through the second-stage planet carrier 12.

[0025] Compared with the prior art, the wind power yaw variable-pitch reducer adopting the few-tooth-difference structure transmission has the following advantages:

[0026] In the wind power yaw variable-pitch reducer adopting the few-tooth-difference structure transmission provided in the embodiment of the utility model, the power is input to the yaw reducer by the motor, the connector drives the first-stage sun gear to rotate, the power is output to the second-stage sun gear by the first-stage planet carrier, the power is output to the eccentric transmission shaft by the second-stage planet carrier, the power is output to the open gear by the output gear ring through the few-tooth-difference mechanism, and the nacelle is driven to track the wind, so that the wind power yaw variable-pitch reducer adopting the few-tooth-difference structure transmission provided in the embodiment of the utility model utilizes the large speed ratio characteristic of the 2Z-X(I) type few-tooth-difference structure, changes the two-stage low-speed planetary transmission structure into the 2Z-X(I) type few-tooth-difference structure, and the transmission mode combining the few-tooth-difference transmission mechanism and the planetary transmission mechanism is not limited to the number of planetary transmission mechanisms, so that the large speed ratio requirement of the yaw reducer can be met while the number of planetary gear transmission stages is reduced, the weight and volume of the reducer are effectively reduced, and the function of reducing cost and increasing efficiency is realized.

[0027] In actual application, for example, Figure 1As shown, the yaw reducer's low-tooth-difference transmission mechanism consists of an eccentric drive shaft 29, a first bearing 16, a bearing mounting seat 15, a fixed gear ring 17, an output gear ring 20, a second bearing 18, a third bearing 19, a balance block 21, a fourth bearing 23, and planetary gears 30. The eccentric drive shaft 29 is connected to the second-stage planetary carrier 12 via a spline. The upper half of the planetary gears 30 meshes with the fixed gear ring 17 via the second bearing 18, and the lower half of the planetary gears 30 meshes with the output gear ring 20 via the third bearing 19. The eccentric drive shaft 29 is mounted on the bearing mounting seat 15 and the open gear 28 via the first bearing 16 and the fourth bearing 23. In the low-tooth-difference transmission mechanism, power is input from the eccentric drive shaft 29 and output to the open gear 28 via the output gear ring 20.

[0028] Among them, such as Figure 1 As shown, the yaw reducer output mechanism consists of an open gear 28, a fifth bearing 27, a sixth bearing 24, a lower housing 26, an oil seal 25, and a round nut 22. The open gear 28 is supported and mounted on the lower housing 26 via the fifth bearing 27 and the sixth bearing 24. The oil seal 25 is placed between the fifth bearing 27 and the sixth bearing 24 for oil sealing. The fifth bearing 27 is grease-lubricated, and the sixth bearing 24 is oil-lubricated. The output gear ring 20 is connected to the open gear 28 via a spline and uses a stop fit. The output gear ring 20 is locked to the open gear 28 via the round nut 22, and the clearance of the fifth bearing 27 and the sixth bearing 24 is adjusted via the round nut 22. In the output mechanism, power is output from the output gear ring 20 to the open gear 28, and then output to the yaw gear ring via the open gear 28.

[0029] It should be noted that low-tooth-difference transmission is a high-efficiency speed reduction scheme based on the gear meshing differential principle. Its core lies in achieving a large transmission ratio output through the difference in the number of teeth of the driving and driven gears, while reducing the structural redundancy of traditional multi-stage transmissions. Its main advantages are as follows: large transmission ratio, compact structure, small size and light weight, high transmission efficiency, and good impact resistance and load sharing.

[0030] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A wind power yaw variable pitch speed reducer with a small tooth difference structure transmission, characterized in that, The yaw reducer box is composed of a motor base, an upper machine body, a fixed gear ring and a lower machine body; the lower machine body is fixed to the rack of the wind turbine generator, the motor base, the upper machine body, the fixed gear ring and the lower machine body are connected by bolts respectively; the yaw reducer box is fixed during work, the motor power is reduced and increased in torque by the internal gear of the reducer, and then output to the yaw gear ring by the open gear; The yaw reducer connector is fixed to the motor base by a bearing, the first-stage transmission mechanism is composed of a first-stage sun gear, a first-stage planet gear, a first-stage bearing, a first-stage planet carrier and the upper machine body; the first-stage sun gear is connected to the connector by interference, the first-stage ball top is installed on the baffle, and the first-stage top block is installed on the first-stage sun gear, the first-stage planet gear is installed on the first-stage planet carrier through the first-stage bearing; in the first-stage transmission mechanism, the power is input from the first-stage sun gear and output to the second-stage sun gear through the first-stage planet carrier; The second-stage transmission mechanism of the yaw reducer is composed of the second-stage sun gear, the second-stage planet gear, the second-stage bearing, the second-stage planet carrier and the upper machine body; the second-stage sun gear is connected to the first-stage planet carrier by spline, the second-stage planet gear is installed on the second-stage planet carrier through the second-stage bearing; in the second-stage transmission mechanism, the power is input from the second-stage sun gear and output to the eccentric transmission shaft through the second-stage planet carrier.

2. The wind power yaw variable pitch speed reducer with a small tooth difference structure transmission according to claim 1, characterized in that, The yaw reducer small tooth difference transmission mechanism is composed of the eccentric transmission shaft, the first bearing, the bearing mounting seat, the fixed gear ring, the output gear ring, the second bearing, the third bearing, the balance block, the fourth bearing and the planet gear; the eccentric transmission shaft is connected to the second-stage planet carrier by spline, the upper half of the planet gear is meshed with the fixed gear ring through the second bearing, and the lower half of the planet gear is meshed with the output gear ring through the third bearing; the eccentric transmission shaft is installed on the bearing mounting seat and the open gear through the first bearing and the fourth bearing; in the small tooth difference transmission mechanism, the power is input from the eccentric transmission shaft and output to the open gear through the output gear ring.

3. The wind power yaw variable pitch speed reducer with a small tooth difference structure transmission according to claim 2, characterized in that, The output mechanism of the yaw reducer is composed of the open gear, the fifth bearing, the sixth bearing, the lower machine body, the oil seal and the round nut; the open gear is supported and installed on the lower machine body through the fifth bearing and the sixth bearing, the oil seal is arranged between the fifth bearing and the sixth bearing to seal the oil, the fifth bearing is lubricated by grease, and the sixth bearing is lubricated by oil; the output gear ring is connected to the open gear by spline and matched by the end face; the output gear ring is locked to the open gear through the round nut, and the play of the fifth bearing and the sixth bearing is adjusted through the round nut; in the output mechanism, the power is output from the output gear ring to the open gear, and then output from the open gear to the yaw gear ring.

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