2MW风电机组变桨减速器可靠性分析

摘要

Based on the theory of interference for stress-strength distribution, this paper established reliability models of important parts which consists of all important parts such as gears, planetary axes, bearings and splines in planetary transmission. Whole system reliability was formulated on the combination with system reliability theory and characteristic of hybrid system of multi-stage planetary transmission. And corresponding analysis software compiled with VC ++ was developed, with which self-developed and foreign pitch gearbox for wind turbine and foreigners were analyzed to have the same reliability. Through the reliability analysis results, system reliability can be upgrading by improving weak parts, which supports the reliability optimization.%根据应力-强度分布干涉理论分别建立了行星传动系统中齿轮、行星轮轴、轴承、花键等重要零件的可靠度模型,基于行星传动是串并联混合的混联系统的特点和系统可靠性理论推导出了多级行星传动的系统可靠性模型,用VC＋＋程序开发了相应的可靠性分析软件。运用软件计算了自主研制的风电机组变桨减速器和国外同型号产品,结果显示可靠性水平相当。针对变桨减速器初始设计可靠性分析结果,取薄弱环节加以改进并重新分析,结果表明改进后的系统可靠性明显提高。