Speed-changing gear device

Abstract

The invention provides a speed-changing gear device which comprises a barrel-shaped drive sleeve. A primary inner gear ring and a secondary inner gear ring are fixedly arranged on the inner side face of the drive sleeve, the primary inner gear ring is meshed with a primary sun gear through primary planet gears, the secondary inner gear ring is meshed with a secondary sun gear through secondary planet gears, a sun gear shaft fixedly arranged at the center of the primary sun gear penetrates through a through hole at the center of the secondary sun gear, a planet carrier is arranged between the primary inner gear ring and the secondary inner gear ring, a drive rod penetrating into a central hole of each primary planet gear is arranged at one end of the planet carrier, the other end of the planet carrier is fixedly connected with the secondary planet gears, a mounting hole is arranged at the center of each secondary planet gear, and a planet shaft fixedly connected with a support cover plate is arranged in each mounting hole. The input power and the load of the speed-changing gear device can be borne jointly by the primary inner gear ring and the secondary inner gear ring, so that a bearing mode of the gears is optimized, the size and the weight of other components are reduced, and a drive process is more stable.

Description

technical field [0001] The invention relates to the technical field of mechanical transmission, in particular to a gear transmission device. Background technique [0002] A gearbox is a mechanical transmission component that is widely used to increase or decrease speed. In the wind power generation system, since the speed of the wind rotor is very low, it is far below the speed required by the generator, so a speed-increasing gearbox must be used to convert the low speed of the wind rotor into a high speed output to the generator. Therefore, The speed-up gearbox is a crucial part of the wind turbine, and its performance directly determines the stability and reliability of the wind turbine operation. [0003] The transmission forms used in the speed-up gearbox in the wind power generation system in the prior art mainly include: two-stage planetary transmission plus one-stage parallel shaft transmission structure, one-stage planetary transmission plus two-stage parallel shaft...

AI Technical Summary

Problems solved by technology

In the above-mentioned transmission forms, the input power and torque are transmitted from the first-stage planetary transmission to the output end step by step, that is to say, the gear pairs of each stage must bear all the input loads (if friction loss is considered , the second-stage and third-stage gear pairs need to bear approximately and all input loads); when high power and high torque need to be transmitted, this load-bearing method in the prior art will cause the size and The heavy weight will cause uneven meshing of the gear teeth, unstable transmission, and even deformation of the box, which cannot play the normal transmission role of the gearbox

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