亚临界和超临界汽轮机强度振动与寿命设计判据的研究  

STUDY ON DESIGN CRITERIA OF STRENGTH AND VIBRATION AS WELLAS LIFE FOR SUBCRITICAL AND SUPERCRITICAL STEAM TURBINES

作　　者：史进渊[1] 杨宇[1] 孙庆[1] 杨光海[1] 

机构地区：[1]上海发电设备成套设计研究所,上海200240

出　　处：《机械工程学报》2005年第1期189-192,207,共5页Journal of Mechanical Engineering

基　　金：上海市优秀学科带头人计划资助项目(04XD14025)。

摘　　要：根据多年的科研成果提出了亚临界和超临界汽轮机部件的强度、振动与寿命的20个设计判据。给出了汽轮机的部件静强度、结构有限元分析、隔板刚度、低压缸刚度、汽轮机胀差、叶片动强度、整体围带叶片动强度、长叶片颤振、第一种调频叶片振动、第二种调频叶片振动、整圈连接叶片组振动、轴系临界转速、轴系油膜涡动的稳定性、不平衡响应、轴系扭振频率、轴系扭振应力、汽流激振、低周疲劳寿命、蠕变寿命和蠕变与低周疲劳交互作用下寿命等20个设计判据和这些设计判据的应用范围。使用这些设计判据,可以在设计阶段校核和分析汽轮机部件的强度、振动和寿命设计的安全性与可靠性,为大型汽轮机的研制和生产提供了科学的依据。According to many achievements in scientific re-search on steam turbines, some design criteria of the strength, vibration and life design of subcritical and supercritical steam turbine components are presented. The design criteria for the following 20 kinds of the design, including: static strength, finite element analysis of structures, diaphragm stiffness, stiffness of low pressure casings, differential expansion for steam turbines, vibrational strength for blades, vibrational strength for integrated shroud blades, flutter for long blades, vibration for first kind of tuned blades, vibration for second kind of tuned blades, vibraton for packet of blades on disk connected closedly, critical speed for rotor-bearing system, steadiness of oil whirling for rotor-bearing system, unbalance vibration response, torsional vibration frequencies for rotor-bearing system, tor-sional vibration strees for rotor-bearing system, steam-excitedvibration, low cycle fatigue life, creep life and life under creep and low cycle fatigue interaction are given together with application range for the design criteria. With the design criteria as given, the safety and reliability of strength, vibration and life design of steam turbine components can be determined in the designing stage. The suggested method may provide a scientific basis for research, development and manufacture of large capacity steam turbines.

关 键 词：汽轮机 可靠性设计 强度设计 振动设计 寿命设计 设计判据 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]