挤压膜气体推力轴承悬浮承载特性研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (23) : 119-124.

论文

挤压膜气体推力轴承悬浮承载特性研究

宋德红，石明辉，张绍林，夏伯乾，张炳坤

作者信息 +

Suspension load-bearing characteristics of Squeeze film gas thrust bearing

SONG Dehong, SHI Minghui, ZHANG Shaolin, XIA Boqian, ZHANG Bingkun

Author information +

文章历史 +

摘要

挤压膜气体轴承因其稳定性好、工作模式多样等优点在高速旋转机械中具有广泛的应用前景。高频振动下其结构振型与润滑气膜的耦合是典型的流固耦合问题，为研究挤压膜气体轴承润滑承载特性，基于挤压效应原理提出了一种新型挤压膜气体推力轴承。采用有限元法求解轴承结构振型，并以流体润滑理论为基础，建立了耦合轴承结构振型的悬浮承载特性分析模型，分析了轴承结构、驱动电压等参数对挤压悬浮特性的影响规律。结果表明：挤压膜气体轴承气膜压力呈周期性变化，周期内大于环境压力的平均气压提供了悬浮力，且悬浮力随驱动电压的增加而增大，理论与实验结果相吻合，验证了悬浮承载模型的正确性。该研究能够进一步丰富气体推力轴承理论模型。

Abstract

Squeezed film gas bearings have a wide range of applications in high-speed rotating machinery due to their advantages of good stability and various operating modes. Under high frequency vibration, the coupling between its structural vibration and lubrication gas film is a typical fluid-solid coupling problem, in order to study the lubrication Load-carrying capacity of extruded film gas bearings, a new type of squeezed film gas thrust bearing is proposed based on the principle of Squeeze effect. The finite element method is used to solve the vibration pattern of the bearing structure, and based on the fluid lubrication theory, an analytical model of the levitation Load-carrying capacity of the coupled bearing structure vibration pattern is established, and the influence laws of the bearing structure, driving voltage and other parameters on the levitation characteristics of the extrusion are analysed. The results show that the gas film pressure of the squeezed film gas bearing changes periodically, and the average gas pressure larger than the ambient pressure during the cycle provides the levitation force, and the levitation force increases with the increase of the driving voltage, and the theoretical and experimental results coincide with each other, which verifies the correctness of the levitation bearing model. This study can further enrich the theoretical model of gas thrust bearing.

导出引用

宋德红, 石明辉, 张绍林, 夏伯乾, 张炳坤. 挤压膜气体推力轴承悬浮承载特性研究[J]. 振动与冲击, 2024, 43(23): 119-124

SONG Dehong, SHI Minghui, ZHANG Shaolin, XIA Boqian, ZHANG Bingkun. Suspension load-bearing characteristics of Squeeze film gas thrust bearing[J]. Journal of Vibration and Shock, 2024, 43(23): 119-124

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