基于ASME设计规范的汽轮发电机转子齿疲劳强度分析  

Rotor Tooth Fatigue Strength Analysis of Turbine Generator Based on The ASME Design Process

作　　者：蒲太平 李积霞 彭礼明 PU Taiping;LI Jixia;PENG Liming(Dongfang Electric Machinery Co.,Ltd.,Deyang 618000,China)

机构地区：[1]东方电气集团东方电机有限公司,四川德阳618000

出　　处：《大电机技术》2018年第4期27-31,共5页Large Electric Machine and Hydraulic Turbine

摘　　要：频繁起停汽轮发电机会带来疲劳破坏的问题,需进行疲劳寿命校核,目前对于发电机转子齿疲劳强度计算暂无专用的规范流程或标准可参考。基于ASME设计规范的疲劳校核流程,以我公司60MW光热汽轮发电机转子齿端部为分析对象,使用有限元应力计算方法对其进行应力计算,采用ASME设计规范的应力线性化、疲劳筛分程序及疲劳损伤计算理论对有限元计算结果进行处理和疲劳损伤计算,从而得到了分析对象疲劳损伤率,计算结果显示该机型转子齿端部疲劳损伤率最大点位置满足ASME设计规范要求。文章介绍的计算流程和方法为国际通用的机械结构强度分析规范,解决了目前发电机转子疲劳寿命无专用的计算标准和流程的问题,为需频繁起停的汽轮发电机转子设计提供了参考。Fatigue life check of the turbine generator with frequent start/stop operation should be carried out. There is no special specification process or standard for the calculation of fatigue strength of generator rotor teeth currently. Based on the ASME design process, the end part of 60MW solar-thermal turbine generator rotor tooth is analyzed. The finite element method is used to calculate the stress of the generator rotor tooth. The stress linearization, fatigue screening program and fatigue damage calculation theory of ASME design process are used to deal with the result of finite element stress analysis and fatigue damage calculation. And the fatigue damage rate of the analyzed object is obtained. The requirements of ASME design specification is satisfied. The calculation process and method introduced in this paper are the common specifications of mechanical structure strength analysis, which solve the problem of no special calculation process for the fatigue life of generator rotor. It provides a reference for the design of generator with frequent start and stop operation.

关 键 词：汽轮发电机 频繁起停运行 疲劳强度计算 设计规范 

分 类 号：TM311[电气工程—电机]