Elastic wind power coupler with stepless speed change and on-off functions

Abstract

The invention relates to the technical field of wind turbine generator couplers, and provides an elastic wind power coupler with stepless speed change and on-off functions. The elastic wind power coupler comprises a first flange used for being connected with a gearbox, a second flange used for being connected with a motor shaft, and a coupler intermediate shaft. One end of the coupler intermediate shaft is connected with the first flange through a speed controller, and the other end of the coupler intermediate shaft is connected with the second flange through a diaphragm coupler. The speed controller comprises a shell, a piston arranged in the shell and matched friction plate sets arranged between the shell and the coupler intermediate shaft. The elastic wind power coupler further comprises an oil way and an oil supply system. According to the elastic wind power coupler, the structure is simple, stepless speed reduction for the input rotating speed is achieved, smooth transition of torsion between a gearbox input shaft and a motor output shaft can be achieved, the on-off function and the torque protection function are achieved, the offset between the gearbox and an electric generator shaft is compensated, working conditions of the shafts and supports are improved, vibration is reduced, and shaft system resonance is avoided.

Description

technical field [0001] The invention relates to the technical field of wind turbine couplings, in particular to an elastic wind turbine coupling with continuously variable speed and clutch functions. Background technique [0002] At present, variable-speed constant-frequency wind turbines are the mainstream wind turbines. When it is working, due to the huge inertia of the impeller, it usually takes a few seconds for the impact of the pitch change to appear on the unit, which can easily cause large fluctuations in power. Usually, the rapid adjustment is achieved through generator torque control. Stable energy output is ensured through the coordinated control of pitch adjustment and variable speed adjustment. There is also load (grid) fluctuations that will also have an impact on the gearbox. [0003] In addition to the basic control objectives, an ideal wind turbine control system should also achieve the following control objectives as much as possible: reduce the torque pe...

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Problems solved by technology

[0006] However, this kind of coupling can only transmit constant torque. When the wind speed is high, due to the huge inertia of the impeller, the response speed of the general power feedback method is slow, the speed and torque still fluctuate, and the peak value of torque and speed will be formed. This will cause impact on the gears in the gearbox. During the process of mechanical rotation, a pair of gears mesh alternately. Periodic impacts will cause vibration between the gears, which will cause gearbox failure and shorten the life of the gearbox.

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