Investigation on pitch system loads by means of an integral multi body simulation approach

The Science of Making Torque from Wind

Berroth, J.^1 ; Jacobs, G.^1 ; Kroll, T.^2 ; Schelenz, R.^1

Center for Wind Power Drives (CWD), RWTH Aachen University, Aachen

52056, Germany^1

Institute for Machine Elements and Machine Design (IME), RWTH Aachen, Aachen

52056, Germany^2

关键词: backlash;    Electrical actuators;    Electrical drives;    Horizontal axis wind turbines;    Individual pitch;    Multibody simulations;    pitch system;    Wind turbine simulation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/753/11/112002/pdf
DOI  :  10.1088/1742-6596/753/11/112002

来源: IOP

【 摘 要 】

In modern horizontal axis wind turbines the rotor blades are adjusted by three individual pitch systems to control power output. The pitch system consists of either a hydraulic or an electrical actuator, the blade bearing, the rotor blade itself and the control. In case of an electrical drive a gearbox is used to transmit the high torques that are required for blade pitch angle adjustment. In this contribution a new integral multi body simulation approach is presented that enables detailed assessment of dynamic pitch system loads. The simulation results presented are compared and evaluated with measurement data of a 2 MW-class reference wind turbine. Major focus of this contribution is on the assessment of non linear tooth contact behaviour incorporating tooth backlash for the single gear stages and the impact on dynamic pitch system loads.