风机主传动系统法兰连接摩擦性能与预紧力研究  

Study on pre-tightening force and friction performance of flange connection for wind generator main drive system

作　　者：宁文钢 姜宏伟[1] 王建梅[2] 陈明达 王岳峰[1] NING Wen-gang;JIANG Hong-wei;WANG Jian-mei;CHEN Ming-da;WANG Yue-feng(Taiyuan Heavy Industries Co.,Ltd.,Technology Center,Taiyuan 030024,China;Engineering Research Center Heavy Machinery Ministry of Education,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原重工股份有限公司技术中心,山西太原030024 [2]太原科技大学重型机械教育部工程研究中心,山西太原030024

出　　处：《重型机械》2020年第4期38-43,共6页Heavy Machinery

基　　金：国家重点研发计划(2019YFB2005005);山西省科技重大专项(20181102023)。

摘　　要：传统风电法兰连接预紧力设计采用经验公式进行计算。本文以风电机组主传动系统法兰连接为研究对象,对含涂层法兰材料进行了摩擦特性对比试验,结果表明含涂层材料比普通材料的摩擦系数高40%;同时,建立了不同摩擦系数和不同预紧力下的轮毂-主轴法兰连接数值模型,分析了预紧力-应力动态响应特性,发现在保证设计安全系数前提下适当减小预紧力可提高法兰连接应力场分布均匀性。在一定程度上缓解热点区域应力集中现象,为风电机组法兰连接预紧力设计和主传动系统轴承选型提供一定的理论支撑和技术指导。The traditional design method of flange connection pre-tightening of wind power uses empirical formula for calculation.Taking the flange connection of the wind turbine main drive system as the research object,the friction characteristics of coated flange material are test compared,the results showes that the friction coefficient of coated material is 40%higher than that of ordinary material.At the same time,this paper set up a wheel hub-spindle flange connection numerical model with different pre-tightening force and friction coefficient,analyzed the pre-tightening force-stress dynamic response characteristics.It is found that reducing pre-tightening force can improve stress field distribution uniformity of the flange connection under the circumstances of designing safety factor premise,which helps to relief the stress concentration in hot spots to a certain extent.It provides theoretical and technical support for the preload design of flange connection and bearing selection of main drive system.

关 键 词：风电机组 法兰连接 螺栓预紧力 轴承 应力场分布 

分 类 号：TH131.7[机械工程—机械制造及自动化]