基于磁流变阻尼器的密封减振技术实验研究

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摘要针对透平机械密封系统的密封流体激振问题，将一种电流调节式磁流变阻尼器引入密封系统，设计搭建密封转子减振实验台，研究了磁流变阻尼器对不同转速和偏心率下的密封转子振动的抑制规律。实验发现，磁流变阻尼器可以抑制密封流体引起的转子振动，并且随着阻尼器工作电流的增加，抑振效果越好，降幅可达65.02%。利用Labview设计一种基于密封流体激振幅值的开关控制程序，实时监测转子的振动幅值，主动调节阻尼器工作电流，对密封系统进行开关控制实验，取得了良好的抑振效果，最高降幅可达68.71%。

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	郭咏雪
	何立东
	李宽

关键词 ：密封流体激振, 磁流变阻尼器, 振动开关控制, 主动控制技术

Abstract：In order to alleviate the seal fluid excitation in a turbo-machinery, a sealing system was designed and built with a current-adjustable magnetorheological damper installed on an experiment bench. Through experiments, the vibration inhibition by the magnetorheological damper at different rotating speed and eccentricity was achieved. The results show that the magnetorheological damper can reduce the seal fluid induced vibration and the vibration suppression effect is better with the increase of the damper working current. The decline of the vibration is up to 65.02%. A switch control strategy based on Labview was applied in the vibration control system. The working current of the damper was adjusted actively according to the vibration amplitude of the rotor monitored in real time.In the switch control experiment on sealing system, a fine vibration suppression effect was obtained and the maximum reduction can reach 68.71%.

Key words： seal fluid excitation magnetorheological damper vibration switch control；active control technology

收稿日期: 2017-09-27 出版日期: 2019-11-15

引用本文:

郭咏雪，何立东，李宽. 基于磁流变阻尼器的密封减振技术实验研究[J]. 振动与冲击, 2019, 38(22): 144-148.
GUO Yongxue，HE Lidong，LI Kuan. Experimental study on the seal fluid excitation control technology based on a magneto-rheological (MR) damper. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(22): 144-148.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2019/V38/I22/144

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