Wind turbine cycloidal yaw gearbox

Abstract

The invention relates to the technical field of wind-electricity yawing speed reduction. A cycloid yawing gearbox for a wind driven generator comprises a base, an input shaft, a cycloid wheel component, an eccentric bearing, a pin wheel housing, a needle pin, a front base and an output mechanism, wherein the output mechanism comprises an output shaft, a column pin, a column sleeve and a uniform loading ring; the base, the pin wheel housing and the front base are integrally linked in turn; the cycloid yawing gearbox is characterized in that a cycloid component is a cycloid rim and cast iron spoke assembly; the thickness of a middle gear is two times of the thickness of equal thick wheels on two sides; a phase difference between the middle gear and the wheels on the two sides is 180 degrees; the eccentric bearing comprises conical roller bearings and eccentric bushings; the conical roller bearings are two back-to-back bearing sets; and a wear-resisting ring is matched in a pin hole of the cast iron spoke in a sliding form. The cycloid yawing gearbox has the beneficial effects: a single-stage speed reduction ratio is as high as 143; the structure is compact; the weight is light; the maintenance is convenient; the axial size is short; the cycloid gear teeth and a half-imbedded needle pin do not break, so that the transmission loading force is greater than that of an NGW with three planet gears; and the cost of the present cycloid is less than a half of a planet speed reducer, so that the manufacturing cost is 45-55% lower.

Description

【Technical field】 [0001] The present invention relates to the technical field of wind power yaw deceleration, and is an improvement of the invention application "three-piece cycloid yaw reducer for wind power generation" (201010174547.5), a cycloid yaw gearbox for wind power generators. 【Background technique】 [0002] 7. The yaw gearbox at an altitude of 80 meters must have high overload capacity and high reliability. Zhengzhou Mechanical Research Institute’s “Overview of Wind Power Generation and Wind Power Gearboxes” pointed out: “The damage rate of some wind farm gearboxes is as high as 40-50%. The eclipse exceeds the design expectation.” The background technology is mainly a four-level planetary structure: [0003] ①Nanjing High Speed ​​Gear Company "Wind Power Yaw Gearbox" ZL200410064930; [0004] ②Chongqing Gear Company "Wind Power Yaw Reduction Gearbox" 200620111262; [0005] ③ Tailong Group "Wind Power Yaw Reduction Device" 200910034525; [0006] ④Yinchuan Power ...

AI Technical Summary

Problems solved by technology

[0011] (3) The four-stage planetary reduction makes the axial dimension very long, the structure is very complicated, the maintenance is very inconvenient, and the price is very high

[0013] (1) Tianjin reducer company "for wind power generation yaw reducer" 200320111939.2 is a cycloid + two-stage planetary structure, the disadvantages are: the efficiency is reduced by 2 percentage points, and the high-speed cycloid double fulcrum pin structure, so the overload force Low, poor reliability;

[0014] (2) Chongqing University "A Secondary Envelope..." 200920127322.7 is a cycloid + cycloid structure. The disadvantages are: the efficiency is reduced by 4 percentage points, and the two output shafts are placed between the end disc and the hypocycloid. 2-3 models larger than normal, the price is very high;

[0016] ①The "cycloid + triple cycloid" structure reduces the efficiency by 4 percentage points, and the phase difference of the three wheels is 120°, and the dynamic balance cannot be achieved;

[0017] ②The static balance adjustment of the pin hole grinder is troublesome, and the pin hole accuracy is unstable, which will affect the service life of the reducer;

[0018] ③The radial clearance of the roller bearing is large, and the cycloidal wheel produces click and click micro-vibrations during translational motion, and shocks occur over time, resulting in damage to the eccentric bearing and failure of the reducer

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