磁悬浮轴承转子热弯曲振动影响因素分析
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TH133.3

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国家自然科学基金资助项目(51875275);江苏省“六大人才高峰”资助项目(JNHB?041);江苏省重点研发计划资助项目(BE2019122


Influence Factors Analysis of Thermal Bow Vibration in Active Magnetic Bearing Supported Rotor
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    摘要:

    为了研究磁悬浮轴承转子系统中热弯曲振动的影响因素,根据磁悬浮轴承转子热弯曲振动机理,提出了一种迭代计算方法,不断更新计算条件,反复迭代计算,直到振动收敛或发散,由此得到转子工作时电控参数和转子结构参数对热弯曲振动的影响。计算结果表明:电控参数中,改变偏置电流和积分系数对热弯曲振动无明显影响,而提高比例系数和微分系数会使热弯曲振动的影响增大;转子结构参数中,增大非悬臂侧轴段长度和悬臂侧轴段长度会降低热弯曲振动的影响,而增大悬臂长度和外挂圆盘半径会轻微增大热弯曲振动的影响。由此可知,电控系统和转子自身的幅频特性决定热弯曲的影响程度,二者的相频特性决定热弯曲振动的变化趋势。

    Abstract:

    In order to study the influence factors of the control system and structure of the rotor on the thermal bow vibration in magnetic bearings-rotor system, a new method is proposed based on its thermal bending vibration mechanism to constantly update the calculation conditions, iterative calculation, until the vibration convergence or divergence. So, the influence of the electric control parameters and the rotor structure parameters on thermal bending vibration is obtained. The calculation results show that, among the electronic control parameters, changing the bias current and integral coefficient has no obvious influence on the thermal bending vibration, while increasing the proportional coefficient and differential coefficient can increase the influence of the thermal bending vibration. In terms of rotor structure parameters, increasing the length of the non-cantilever and cantilever lateral axis reduces the influence of thermal bending vibration, while increasing the cantilever length and the radius of the external disk slightly increases the influence of thermal bending vibration. It can be seen that the amplitude-frequency characteristics of the electronic control system and the rotor itself determine the influence degree of thermal bending, and the phase-frequency characteristics of the two determine the change trend of thermal bending vibration.

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  • 在线发布日期: 2022-08-27
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