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CN-224229188-U - Lightweight yaw speed reducer planetary gear train

CN224229188UCN 224229188 UCN224229188 UCN 224229188UCN-224229188-U

Abstract

A lightweight yaw speed reducer planetary gear train belongs to the technical field of wind power equipment. The yaw speed reducer solves the problems of large whole size and heavy weight of the existing yaw speed reducer. The planetary gear is characterized in that the primary sun gear and the secondary sun gear are oppositely arranged up and down along the same axis, the gear ring and the primary sun gear are coaxially arranged, a plurality of planetary gears are meshed between the primary sun gear and the gear ring, each planetary gear is internally inserted with a wheel shaft, a plurality of cylindrical rolling bodies are arranged between the planetary gears and the wheel shafts, the bottoms of the wheel shafts are fixedly connected with the planet carrier, and the planet carrier is meshed with the spline at the top of the secondary sun gear through the spline on the planet carrier for transmission. According to the utility model, the cylindrical rolling bodies are arranged between the planetary gears and the wheel shafts to form the support, so that the occupation of extra structural space is eliminated, the structure is simplified from the root, the space utilization rate is greatly improved, the layout of the whole planetary gear train is more compact and firm, and the light weight of the structure is realized.

Inventors

  • WANG JIYU
  • Hao Yuanzheng
  • Cao Zuoyu
  • SUN LI
  • GONG DENING
  • WANG LE
  • TAO QI

Assignees

  • 大连大重齿轮传动机械有限公司
  • 大连华锐重工集团股份有限公司

Dates

Publication Date
20260512
Application Date
20260413

Claims (8)

  1. 1. The utility model provides a lightweight yaw speed reducer planetary gear train, includes one-level sun gear (1), a plurality of planet wheel (2), ring gear (6), second grade sun gear (7) and planet carrier (9), one-level sun gear (1) with second grade sun gear (7) are arranged along same axis about relative, ring gear (6) with one-level sun gear (1) coaxial setting, meshing has a plurality of planet wheel (2) between one-level sun gear (1) with ring gear (6), every all cartridge has shaft (4) in planet wheel (2), planet wheel (2) with be equipped with a plurality of cylinder rolling bodies (3) between shaft (4), the bottom of shaft (4) with planet carrier (9) fixed connection, planet carrier (9) through the spline meshing transmission on its top of second grade sun gear (7).
  2. 2. The lightweight yaw reduction planetary gear train according to claim 1, wherein an annular rolling groove is formed between the planet gears (2) and the opposite surfaces of the wheel shafts (4), and the plurality of cylindrical rolling bodies (3) are mounted in the annular rolling groove.
  3. 3. The lightweight yaw reducer planetary gear train of claim 1, wherein a shoulder is arranged at the bottom of the wheel shaft (4), the wheel shaft (4) is abutted to the planet carrier (9) through the shoulder, and the wheel shaft (4) is fixedly connected with the planet carrier (9) through a circlip.
  4. 4. A lightweight yaw reducer planetary gear train according to claim 2, characterized in that a washer (5) is arranged between the planet wheel (2) and the planet carrier (9).
  5. 5. The lightweight yaw reducer planetary gear train according to claim 1, wherein a shaft shoulder is formed on the periphery of the secondary sun gear (7), and the secondary sun gear (7) and the planet carrier (9) are axially positioned through the shaft shoulder.
  6. 6. The lightweight yaw reducer planetary gear train according to claim 4, wherein a backing plate (8) is arranged between the primary sun gear (1) and the secondary sun gear (7).
  7. 7. The lightweight yaw reducer planetary gear train according to claim 6, wherein the washers (5), the cylindrical rolling bodies (3) and the backing plates (8) are subjected to integral hardening treatment, and the annular rolling grooves, the bottom surfaces of the planetary gears (2), the upper and lower end surfaces of the primary sun gear (1) and the upper and lower end surfaces of the secondary sun gear (7) are subjected to hardening treatment.
  8. 8. The lightweight yaw reducer planetary gear train according to claim 1 is characterized in that oil grooves are formed in the lower end faces of the primary sun gear (1) and the secondary sun gear (7).

Description

Lightweight yaw speed reducer planetary gear train Technical Field The utility model relates to the technical field of wind power equipment, in particular to a lightweight yaw speed reducer planetary gear train. Background The yaw speed reducers are applied to a yaw driving system of the wind driven generator, and are usually meshed with the slewing bearing large gear ring at the same time to jointly drive the main engine room of the wind driven generator to rotate so as to realize the adjustment of the engine room to wind. At present, the yaw speed reducer mostly adopts a structure form of multistage planetary gear trains connected in series, and the structure has the problems of large transmission torque, high reliability, large whole volume and heavy weight, and is difficult to completely adapt to the increasingly severe requirements of wind driven generators on installation space and running energy consumption. The known transmission technology with small tooth difference has theoretical application in a yaw speed reducer, has the advantage of relatively compact structure, but has low transmission efficiency and higher manufacturing cost, and is difficult to popularize in actual batch application. Therefore, the weight reduction and the compactness optimization are carried out on the basis of the traditional planetary gear train structure, and the improvement is particularly carried out on the problems that the structural layout is not compact enough and the strength redundancy exists in part of components, so that the method becomes an important research direction for reducing the size and the weight of the planetary gear train of the yaw speed reducer. Disclosure of utility model The utility model aims to solve the problems, and further provides a lightweight yaw reducer planetary gear train. The technical scheme includes that the light yaw speed reducer planetary gear train comprises a primary sun gear, a plurality of planet gears, a gear ring, a secondary sun gear and a planet carrier, wherein the primary sun gear and the secondary sun gear are arranged up and down along the same axis in a relative mode, the gear ring and the primary sun gear are coaxially arranged, the planet gears are meshed between the primary sun gear and the gear ring, each planet gear is internally inserted with a wheel shaft, a plurality of cylindrical rolling bodies are arranged between the planet gears and the wheel shafts, the bottom of each wheel shaft is fixedly connected with the planet carrier, and the planet carrier is meshed with a spline at the top of the secondary sun gear through a spline on the planet carrier for transmission. Further, an annular rolling groove is formed between the opposite surfaces of the planet wheel and the wheel shaft, and the plurality of cylindrical rolling bodies are installed in the annular rolling groove. Further, a retaining shoulder is arranged at the bottom of the wheel shaft, the wheel shaft is in abutting connection with the planet carrier through the retaining shoulder, and the wheel shaft is fixedly connected with the planet carrier through an elastic retainer ring. Further, a washer is arranged between the planet wheel and the planet carrier. Further, a shaft shoulder is formed on the periphery of the secondary sun gear, and the secondary sun gear and the planet carrier are axially positioned through the shaft shoulder. Further, a backing plate is arranged between the primary sun gear and the secondary sun gear. Further, the gasket, the cylindrical rolling bodies and the backing plate are all integrally hardened, and the annular rolling grooves, the bottom surfaces of the planet gears, the upper end surface and the lower end surface of the primary sun gear and the upper end surface and the lower end surface of the secondary sun gear are all hardened. Further, the lower end surfaces of the primary sun gear and the secondary sun gear are respectively provided with an oil groove. Compared with the prior art, the utility model has the following effects: The utility model forms a support by directly arranging full cylindrical rolling bodies between the planet wheel and the wheel shaft. The high integration of the support function inside the planetary wheel set eliminates additional structural space occupation, so that the radial dimension of the planetary wheel assembly is significantly reduced. The integrated design simplifies the structure from the root on the premise of ensuring the bearing reliability, greatly improves the space utilization rate, ensures that the whole planetary gear train layout is more compact and light, and lays a core foundation for the miniaturization of the speed reducer; According to the utility model, the secondary sun gear and the planet carrier are in spline engagement transmission, and the primary sun gear and the secondary sun gear are coaxially arranged up and down along the axis, so that the power transmission and the output are highly integrated. T