涡轮分子泵轴系的临界转速分析
陈乃玉，李强，赵庆斌，李新友，蔡辉
（天津航天长征火箭制造有限公司，天津 300462）
摘要：涡轮分子泵是一种工作在一阶临界转速之上的精密高速旋转机械，在设计时需要避开其临界转速。以有限元软件SolidWorks Simulation为依托，结合传递矩阵理论的简化思想，对涡轮分子泵轴系进行模态分析，并寻找其临界转速与设计工作转速冲突的最优解决方案。同时，对涡轮动叶片组的有限元简化方式进行了探讨。
关键词：涡轮分子泵；临界转速；传递矩阵法；有限元
中图分类号： O242.21 文献标志码：A doi：10.3969/j.issn.1006-0316.2015.01.005
文章编号：1006－0316 (2015) 01－0019－04
Analysis of the turbo-molecular pump shaft’s critical speed
CHEN Nai-yu，LI Qiang，ZHAO Qing-bin，LI Xin-you，CAI Hui
( Tianjin Long March Launch Vehicle Manufacturing Co., Ltd., Tianjin 300462, China )
Abstract：The turbo-molecular pump is a precision high-speed rotating machine working above its first critical speed. Therefore, when design the pump, it is essential to avoid its critical speed. By using the FEA software SolidWorks Simulation to analysis the vibration mode of the turbo-molecular pump which had been predigested by the ideology of transfer matrix method, in this paper, we have found a good way to balance the contradiction between its critical speed and working speed designed. Meanwhile, the discussion on how to simplify the turbine blade groups in the FEA model was also included in detail.
Key words：turbo-molecular pump；critical speed；transfer matrix method；FEA
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收稿日期：2014－06－16
作者简介：陈乃玉（1987－），山东东平人，硕士，主要从事机械结构设计、分析与研究工作。
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