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.
出处
《矿山机械》
北大核心
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)
关键词
多级离心泵
临界转速
转子
multi-stage centrifugal pump
critical speed
rotor
