某型燃气轮机涡轮盘热态超速预应力试验研究  

Research on Overspeed Pre-stressing Test of Gas Turbine Disc under Hot Condition

作　　者：季晨 何建元 孙景国 孙彦博 JI Chen;HE Jian-yuan;SUN Jing-guo;SUN Yan-bo(No.703 Research Institute of CSSC,Harbin,China,Post Code:150078;National Engineering Research Center of Special Equipment and Power System for Ship and Marine Engineering,Harbin,China,Post Code:150078)

机构地区：[1]中国船舶集团有限公司第七〇三研究所,黑龙江哈尔滨150078 [2]船舶与海洋工程特种装备和动力系统国家工程研究中心,黑龙江哈尔滨150078

出　　处：《热能动力工程》2022年第12期73-79,共7页Journal of Engineering for Thermal Energy and Power

基　　金：国家重大科技专项(J2019-Ⅳ-0015)。

摘　　要：为提高某型燃气轮机涡轮盘使用寿命,采用弹塑性有限元仿真分析及通用斜率公式方法,预测了轮盘残余变形、应力与转速的关系以及预应力处理前后盘心位置低循环疲劳寿命。根据仿真结果确定超转转速后,通过设计的具有轴向补偿功能的预应力处理试验工装,对涡轮盘开展热态160%超速预应力处理试验研究。研究结果表明:采用的分析模型对涡轮盘残余变形预测精度高,轮缘及轮盘内孔残余变形计算结果与试验测量结果相比,误差分别为4.29%和2.50%,并且预应力处理能够显著提升盘心危险位置的低循环疲劳寿命。For the purpose of extending the service life of the turbine disc of a certain gas turbine,the relationship of disc residual deformation and stress versus rotation speed,as well as the low cycle fatigue life of the disc bore position before and after pre-stressing treatment were predicted using elasto-plastic finite element simulation analysis and the general slope formula method.After determining the speed of the overspeed,based on the simulation results,160% overspeed pre-stressing test of the turbine disc was carried out under hot condition by means of a designed test tooling with axial compensation function.The research result shows that the analytical model used in this paper has a high accuracy in predicting the residual deformation of the turbine disc,with a residual deformation calculation error of 4.29% for the rim and 2.50% for the inner bore of the disc compared to the experimental measurement results.Furthermore,the pre-stressing treatment can improve the low cycle fatigue life at the disc bore position significantly.

关 键 词：燃气轮机 涡轮盘 预应力 残余变形 低循环疲劳寿命 

分 类 号：TK221[动力工程及工程热物理—动力机械及工程]