多级离心泵临界转速计算分析  

Calculation and analysis of critical speed of multi-stage centrifugal pump

作　　者：汪家琼[1] 孔繁余[1] 钱永康 

机构地区：[1]江苏大学流体机械工程技术研究中心,江苏镇江212013 [2]浙江佳力科技股份有限公司,浙江杭州311241

出　　处：《矿山机械》2014年第1期56-60,共5页Mining & Processing Equipment

基　　金：国家自然科学基金资助(51209106);国家科技支撑计划课题(2013BAK06B02);江苏大学高级专业人才科研启动基金项目(11JDG040)

摘　　要：为了提高多级泵的可靠性,用有限元方法研究了轴承类型、轴承刚度、轴承位置和级间距等对多级离心泵转子临界转速的影响规律。研究结果表明,滚动轴承比滑动轴承有利于提高多级泵转子的临界转速;滚动轴承的刚度值对临界转速的影响较小;滑动轴承刚度值对转子临界转速影响较大,临界转速随刚度值增加而增加;转子临界转速随级间距的增加而增加;进口端轴承放在首级叶轮之后可以提高泵转子的一阶临界转速,但是二阶临界转速有所下降。To improve the reliability of the multi-stage pump, the influential laws of bearing type, bearing stiffness, bearing location and impeller spacing on the critical speed of the rotor of the multi-stage centrifugal pump was studied with finite element method. It showed： the rolling bearing was helpful for improving the critical speed of the pump rotor compared with the sliding bearing; the rolling bearing stiffness had little influence on the critical speed; the sliding bearing stiffness had great impact on it, and the critical speed rose with increase in the sliding bearing stiffness; the critical speed enhanced with increase in the impeller spacing; the bearing at the inlet laid posterior to the first impeller brought about the rise of the first-stage critical speed of the rotor and the drop of the second-stage critical speed.

关 键 词：多级离心泵 临界转速 转子 

分 类 号：TH311[机械工程—机械制造及自动化]