周向均布拉杆转子低周疲劳寿命研究  

Research on the Fatigue Life of Circumferential Distributed Rod Fastening Rotor

作　　者：张青雷[1,2] 黄魏平 陈堰芳 

机构地区：[1]上海理工大学机械工程学院,上海200093 [2]上海电气集团股份有限公司中央研究院,上海200070

出　　处：《机械设计与制造》2016年第1期238-242,共5页Machinery Design & Manufacture

基　　金：上海市2013年度服务业发展引导资金项目(cn2013000016)

摘　　要：以周向均布拉杆转子为研究对象,综合考虑温度载荷和离心载荷的耦合作用,采用有限元法对拉杆转子启动、稳定运行与停机过程的耦合应力进行计算,依据Miner累积疲劳准则对转子不同启停工况下的疲劳寿命进行分析。研究结果表明:在启动与停机过程中透平鼓筒内倒角处应力集中明显,是拉杆转子疲劳损耗的危险位置;不同工况转子疲劳损耗存在明显的区别,其中冷态启停工况下的寿命损耗最大,每次启停的损耗达到了0.116%,温态启停每次损耗为0.056%,热态启停工况寿命每次损耗仅为0.032%。研究可为周向均布拉杆转子的设计制造及其疲劳寿命的预测提供参考。Considering the coupling effect of temperature load and centrifugal load,circumferential distributed rod fastening rotor is chosen to be research object,and the finite method is employed to analyze the coupled stress during the rotor＇starting,running and stopping. Manson-Coffin equation is used to study the fatigue loss of rotor under different conditions.Calculated results show that the stress concentrations locations of the rotor are the inside chamfer of the turbine drum. It is the dangerous position of rod fastening rotor fatigue loss. Rotor fatigue loss varies from different conditions,and the maximum fatigue loss is in the condition of cold start-up and stop idling,up to 0.116%,and the fatigue loss in the condition of warm start-up and stop idling is 0.056%,the minimum fatigue loss is in the condition of hot start and stop idling,which is only 0.032%. These researches may provide references for the design and manufacture and fatigue life prediction of such circumferential distributed rod fastening rotor.

关 键 词：拉杆转子 热固耦合 应力场 疲劳损耗 

分 类 号：TH16[机械工程—机械制造及自动化]