摘要
建立了汽轮机低压转子落地式轴承座刚度分析有限元模型,采用三维有限元软件Ansys分析了使用弹簧基础的百万等级核电半速汽轮发电机组低压转子落地式轴承座的刚度,并在此基础上计算和分析了轴承座刚度在一定范围内变化时对大型汽轮机低压转子临界转速的影响.结果表明:利用汽轮机低压转子落地式轴承座刚度分析有限元模型计算得到的低压转子轴承座刚度与经验数值量级相同,但大小有一定差异.汽轮机低压转子临界转速对低于一定数值的落地式轴承座支撑刚度变化更敏感,因此在设计时应保证足够大的轴承座刚度.
A finite element model was established for ground standing type bearing support of LP rotor for a 1 000 MW nuclear power half-speed turbine-generator set with spring foundation, with which the support stiffness was analyzed using 3D finite element software Ansys. Effects of the support stiffness on critical speed of the LP rotor were calculated and analyzed on the basis of above stiffness analysis. Results show that the value of bearing support stiffness calculated with the model is different from but in same order of maganitude with that of empirical value. The critical speed of LP rotor is greatly affected by the bearing support stiffness lower than a certain value, therefore for safety operation purposes, the bearing supports should be designed with higher stiffness.
出处
《动力工程学报》
CAS
CSCD
北大核心
2012年第8期602-605,共4页
Journal of Chinese Society of Power Engineering
基金
国家科技重大专项课题资助项目(2010ZX06004-013-03-04)
关键词
核电半速汽轮发电机组
落地式轴承座
支撑刚度
临界转速
弹簧基础
nuclear power half-speed turbine generator set
ground standing type bearing bracket
supportstiffness
critical speedl spring foundation
作者简介
王秀瑾（1977），男，河南南阳人，工程师，硕士，主要从事发电设备强度振动方面的分析和研究．电话（Tel．）：02l一643587lO763；E—mail：wangxiujin@speri．com．cn．
