改进式被动电磁阻尼器及其应用

刘淑莲;郑水英

振动与冲击 ›› 2011, Vol. 30 ›› Issue (9) : 94-97.

PDF(1524 KB)
PDF(1524 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (9) : 94-97.
论文

改进式被动电磁阻尼器及其应用

  • 刘淑莲1; 郑水英2

作者信息 +

Improveed passive electromagnetic damper and its application

  • Liu Shu-lian1; Zheng Shui-ying2
Author information +
文章历史 +

摘要

为了简单可靠的增加转子轴承系统的稳定性,在线消除油膜振荡等故障、抑制振动,提出了一种利用改进的被动式阻尼器在线增加系统阻尼的方法。被动式阻尼器结构类似电磁轴承,当转子旋转时,在转子表面形成电涡流因而产生电磁阻尼,抑制转子振动,但无需闭环控制,采用直流电流工作。增加直流电可以增加阻尼,但是电流增加会使系统的刚度减小,并且也会引起阻力距和阻尼器的发热,为了提高阻尼器的阻尼特性,又要解决刚度减弱问题,在不改变电磁阻尼器结构的和静态电流的基础之上,提出了增加额外电路增加阻尼的新方法,并通过计算选择合适的额外电路元器件的参数,改进后的阻尼器阻尼效果比原始的明显增加。把改进式被动电磁阻尼器用于转子-轴承系统的油膜振荡在线消除,并与原始阻尼器的减振效果比较,实验证明:同样条件下,改进式的被动阻尼器增加外阻尼在线的消除油膜振荡故障、抑制振动效果更好。

Abstract

To simply and reliably improve the rotor-bearing system stability and eliminate the oil whip online, one method of using an improved passive electromagnetic damper to increase the damp is proposed. Its configuration is similar to that of electromagnetic bearing, but no sensors and no closed loop control are needed. When rotor rotates, the electromagnetic damp is formed because of the eddy currents inside the surface layer of rotor to decrease the vibration. Increasing direct current can enhance damp, but the stiffness of system will be decreased and bring resistance torque and heat of damper. In order to improve the characteristics of damper and avoid decreasing the stiffness, one new method of increasing damp by adding extra circuit is present, based on not changing the configution and static current. By choosing the appropriate parameters of extra circuit devices, the damping coefficient of the improved damper is more evident than that of the original damper. When the improved damper is applied to the rotor bearing system, the experiment shows that the effect of decreasing the vibration and eliminating the oil whip is better with the improved damper.

关键词

改进式被动式阻尼器 / 稳定性 / 转子系统 / 应用

Key words

improved passive damper / stability / rotor system / application

引用本文

导出引用
刘淑莲;郑水英. 改进式被动电磁阻尼器及其应用[J]. 振动与冲击, 2011, 30(9): 94-97
Liu Shu-lian;Zheng Shui-ying . Improveed passive electromagnetic damper and its application[J]. Journal of Vibration and Shock, 2011, 30(9): 94-97

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