Static and Dynamic Characteristics and Vibration Suppression of Aerostatic Thrust Bearing

被引：0
|
作者：
Zhang H.-C. [1 ]
Wu Z.-Q. [1 ]
Li Y.-H. [2 ]
Li Y.-J. [1 ]
Zhang G.-Q. [1 ]
Zhang X.-Y. [1 ]
机构：
[1] School of Mechanical Engineering, Tianjin University, Tianjin
[2] Tianjin Key Laboratory of Microgravity and Hypogravity Environment Simulation Technology, Tianjin
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2019年 / 40卷 / 09期
关键词：
Bearing; Dynamic characteristics; Nonlinear energy sink; Static characteristics; Virbration;
D O I：
10.13675/j.cnki.tjjs.180620
中图分类号：
学科分类号：
摘要：
To investigate a new method to suppress the self-excited vibration of gas bearing, the vibration of the disk aerostatic thrust bearing with single orifice compensation was studied. Based on the gas flow equation between two parallel discs, the static and dynamic characteristics analysis models of gas bearing were established. By method of numerical analysis, the effects of gas supply pressure and film thickness were studied and summarized, which included static capacity, static gas mass flow rate, static and dynamic stiffness and dynamic damping of air bearing. By calculating, a series of curves of static and dynamic characteristics of air bearing are obtained. A nonlinear energy sink (NES) was introduced to deal with the self-excited vibration of bearing system which caused by negative damping. The results show that the static characteristic of gas bearings can be effectively improved by increasing the supply pressure. The self-excited vibration of gas bearings is mainly due to the negative damping characteristics of gas squeezing. And the vibration of the system can be effectively suppressed when the damping of NES exceeds the critical damping. © 2019, Editorial Department of Journal of Propulsion Technology. All right reserved.
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页码：2091 / 2098
页数：7
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