计及不平衡磁拉力的高速空气静压电主轴动力学分析

喻丽华; 谢庆生; 李少波; 黄海松

doi:10.13433/j.cnki.1003-8728.2014.0602

计及不平衡磁拉力的高速空气静压电主轴动力学分析

doi: 10.13433/j.cnki.1003-8728.2014.0602

1.
贵州大学,教育部现代制造重点实验室贵阳 550003

基金项目:

国家科技支撑计划项目(2012BAF12B14)资助

详细信息

作者简介:
喻丽华(1975-)，高级实验师，博士研究生，研究方向为先进制造技术和农产品加工机械，yulihua01@163.com

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出版历程
- 收稿日期: 2013-03-19
- 刊出日期: 2015-06-10

The Analysis of the Dynamics of High Speed Motorized Spindle with the Externally Pressurized Gas Bearing Considering Unbalanced Magnetic Pull

1.
Key Laboratory of Advanced Manufacturing Technology,Guizhou University,Guiyang 550003

摘要

摘要: 根据不平衡磁拉力作用机理,在电主轴动力学建模时将其等效为具有"负刚度"的支承元件;基于传递矩阵法建立计及不平衡磁拉力的高速空气静压电主轴的动力学模型,利用MATLAB7.0软件对最高工作转速为25×104r/min空气静压高速电主轴动力学特性进行计算。结果表明:计入磁拉力后电主轴的前3阶临界转速有一定程度的降低,且该电主轴工作转速远远高于1阶临界转速,属于挠性轴范畴。可以看出:1阶振型脆弱点在主轴前端,2阶振型脆弱点在主轴前端和转子轴段。
- 高速电主轴 /
- 传递矩阵法 /
- 动力学分析 /
- 不平衡磁拉力
Abstract: According to the analysis of mechanism of unbalanced magnetic pull(UMP), UMP was equivalent to thesupport element with“negative stiffness” during dynamics analysis of the motorized spindle. Based on the transfermatrix method, the dynamic model for high speed motorized spindle with the externally pressurized gas bearing wasconstructed by considering unbalanced magnetic pull. And taking high speed motorized spindle with the externallypressurized gas bearing as an object, Dynamics characteristic was calculated and simulated by using MATLAB7. 0software. The results showed that first three modes critical speed of motorized spindle considering unbalancedmagnetic pull was reduced to a certain degree, and the spindle speed was much higher than the first-mode criticalspeed, which belonged to the flexible spindle.
- bearings /
- calculations /
- computer simulation /
- dynamics

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参考文献(9)

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