Output structure of wind power yawing variable-pitch speed reducer

Abstract

The utility model discloses an output structure of a wind power yawing variable-pitch speed reducer, relates to the technical field of wind power speed reducers, and is lower in cost and higher in reliability. In the output structure of the wind power yaw variable-pitch speed reducer, an integrated output shaft is provided with a planet wheel and an inner gear ring to form a low-speed planetary gear system; the integrated output shaft is connected with the output gear to form an output transmission system; when the low-speed planetary gear system and the output transmission system are combined to form a torque transmission route, 42CrMoA is adopted as a raw material, so that a forging pit is formed during forging, material waste is reduced, and material cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to wind power speed reducer technical field especially relates to a wind power yaw variable pitch speed reducer's output structure. BACKGROUND

[0002] At present, as the core component of the wind turbine transmission system, the wind power speed reducer bears the key task of converting the low speed and high torque mechanical energy captured by the impeller into the high speed energy required by the generator.

[0003] With the global wind power industry expanding to large megawatt and low wind speed area, the impeller diameter has broken through 200 meters, resulting in the torque load borne by the low speed bearing surging to tens of thousands of newton meters; at the same time, the whole industry chain is eager to reduce cost and increase efficiency, resulting in the increasingly prominent manufacturing cost and maintenance short board of the traditional speed reducer structure.

[0004] In the prior art, the low speed shaft is generally integrated with the output shaft and the output gear; however, the present inventors have found that the following defects exist:

[0005] (1) high manufacturing cost and long manufacturing process cycle: the material is generally 20CrMnMo / 18CrNiMo7-6, and the single heavy forging material utilization rate is low, and the blank weight is large;

[0006] (2) poor maintenance: when the bearing or seal fails, the speed reducer needs to be disassembled as a whole, and the maintenance downtime is long;

[0007] (3) low generalization of spare parts: the shaft system and bearing are highly customized, the spare parts inventory pressure is high, and the emergency replacement cycle is long. INVENTION CONTENTS

[0008] The utility model aims at providing a wind power yaw variable pitch speed reducer's output structure, which can be lower in cost and higher in reliability.

[0009] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0010] A wind power yaw variable pitch speed reducer's output structure, comprising: an integrated output shaft, the integrated output shaft is assembled with a planetary gear and an inner gear ring to form a low speed stage planetary gear system; the integrated output shaft is connected with an output gear to form an output transmission system;

[0011] When the low speed stage planetary gear system and the output transmission system combine to form a torque transmission route, the raw material is 42CrMoA, so as to form a forging pit during forging and reduce material waste and cost.

[0012] In actual application, the integrated output shaft is supported by the first bearing and the second bearing, and is connected with a lower machine body.

[0013] The integrated output shaft is equipped with an oil seal as a sealing element, and the oil seal is located between the first bearing and the second bearing.

[0014] Specifically, the output gear is connected to the integrated output shaft via a round nut, and the round nut is moved from inside the housing to outside the housing.

[0015] Furthermore, the round nut is provided with a locking washer.

[0016] Compared with existing technologies, the output structure of the wind power yaw and pitch reducer described in this utility model has the following advantages:

[0017] In the output structure of the wind turbine yaw and pitch reducer provided by this utility model, the integrated output shaft is equipped with planetary gears and an internal gear ring to form a low-speed planetary gear system. Simultaneously, the integrated output shaft is connected to the output gear to form an output transmission system. Furthermore, when the low-speed planetary gear system and the output transmission system are combined to form a torque transmission route, 42CrMoA is used as the raw material to create forging pits during forging, reducing material waste and lowering material costs. Therefore, the output structure of the wind turbine yaw and pitch reducer provided by this utility model adopts a combination of the output shaft and the low-speed planetary carrier, with the output shaft and output gear separated. The use of 42CrMoA material effectively and reliably reduces raw material costs, assembly costs, and maintenance costs, thereby improving market competitiveness. Attached Figure Description

[0018] Figure 1 A cross-sectional view of the output structure of the wind power yaw pitch reducer provided in this embodiment of the utility model.

[0019] Figure label:

[0020] 1-Internal gear ring; 2-Planetary gear; 3-Integrated output shaft; 4-Lower body; 5-First bearing; 6-Oil seal; 7-Second bearing; 8-Output gear; 9-Stabilizing washer; 10-Round nut. Detailed Implementation

[0021] For ease of understanding, the output structure of the wind power yaw pitch reducer provided in the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] This utility model embodiment provides an output structure for a wind power yaw pitch reducer, such as... Figure 1 As shown, it includes: an integrated output shaft 3, which is equipped with planetary gears 2 and an internal gear ring 1 to form a low-speed planetary gear system; the integrated output shaft 3 is connected to the output gear 8 to form an output transmission system;

[0023] When the low-speed planetary gear system and the output transmission system are combined to form a torque transmission route, 42CrMoA is used as the raw material to form a forging pit during forging and reduce material waste and material cost.

[0024] Compared with the prior art, the output structure of the wind power yaw variable-pitch speed reducer has the following advantages:

[0025] In the output structure of the wind power yaw variable-pitch speed reducer provided in the embodiments of the present application, the integrated output shaft 3 is assembled with the planetary gear 2 and the inner gear ring 1 to form a low-speed planetary gear system; at the same time, the integrated output shaft 3 is connected with the output gear 8 to form an output transmission system; and when the low-speed planetary gear system and the output transmission system are combined to form a torque transmission route, 42CrMoA is used as the raw material to form a forging pit during forging and reduce material waste and material cost. Therefore, the output structure of the wind power yaw variable-pitch speed reducer provided in the embodiments of the present application adopts the mode of combining an output shaft with a low-speed planetary carrier and separates the output shaft from the output gear, and 42CrMoA is selected as the material, so that the raw material cost, assembly cost and maintenance cost can be effectively and reliably reduced, and the market competitiveness is improved.

[0026] In actual application, as shown in Figure 1 The integrated output shaft 3 can be supported by the first bearing 5 and the second bearing 7 and can be connected with the lower body 4.

[0027] As shown in Figure 1 The integrated output shaft 3 can be provided with an oil seal 6 as a sealing member, and the oil seal 6 can be preferably located between the first bearing 5 and the second bearing 7.

[0028] Specifically, as shown in Figure 1 The output gear 8 and the integrated output shaft 3 can be connected by a round nut 10, and the round nut 10 can be preferably transferred from the inside of the box body to the outside of the box body, so that when maintaining, it can be convenient to check whether the round nut 10 is loose or has other failure modes, thereby effectively reducing the failure risk caused by the loosening of the round nut 10 and further reducing the operation and maintenance cost; in addition, the setting of the round nut 10 can make the operation and maintenance convenient, and when replacing the internal vulnerable parts, the round nut 10 is more convenient and fast to disassemble, effectively reducing the operation and maintenance time and cost.

[0029] Further, as shown in Figure 1 The round nut 10 can be provided with a stop washer 9.

[0030] The torque transmission route of the output structure of the wind power yaw variable-pitch speed reducer provided in the embodiments of the present application will be described in detail below with the aid of the drawings:

[0031] When the reduction gear is working, the torque is transmitted to the integrated output shaft 3 through the planetary gear system of the low-speed stage inner ring gear 1 and the planetary gear 2, and then transmitted to the output gear 8 through the integrated output shaft 3.

[0032] The above merely describes the specific implementation of the present application, but the protection scope of the present application is not limited to this, 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. An output structure for a wind turbine yaw and pitch reducer, characterized in that, include: An integrated output shaft, which is equipped with planetary gears and an internal gear ring to form a low-speed planetary gear system; The integrated output shaft is connected to the output gear to form an output transmission system; When the low-speed planetary gear system is combined with the output transmission system to form a torque transmission route, 42CrMoA is used as the raw material to form forging pits during forging, thereby reducing material waste and lowering material costs.

2. The output structure of the wind power yaw pitch reducer according to claim 1, characterized in that, The integrated output shaft is supported by a first bearing and a second bearing, and is connected to the lower body.

3. The output structure of the wind power yaw pitch reducer according to claim 2, characterized in that, The integrated output shaft is equipped with an oil seal as a sealing element, and the oil seal is located between the first bearing and the second bearing.

4. The output structure of the wind turbine yaw pitch reducer according to any one of claims 1-3, characterized in that, The output gear is connected to the integrated output shaft via a round nut, and the round nut is moved from inside the housing to outside the housing.

5. The output structure of the wind power yaw pitch reducer according to claim 4, characterized in that, The round nut is equipped with a locking washer.

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