Theoretical analysis of the slip flow effect on gas-lubricated micro spherical spiral groove bearings for machinery gyroscope

被引：12

作者：

Feng, Kai ^{[1
]}

Li, Wen-Jun ^{[1
,2
]}

Xie, Yong-Qiang ^{[1
,2
]}

Liu, Mei-Xia ^{[2
]}

机构：

[1] Hunan Univ, State Key Lab Adv Design & Mfg Vehicle Body, Changsha 410082, Hunan, Peoples R China

[2] Shanghai Inst Spaceflight Control Technol, Shanghai Key Lab Aerosp Intelligent Control Techn, Shanghai 20000, Peoples R China

来源：

MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS | 2016年 / 22卷 / 02期

基金：

中国国家自然科学基金;

关键词：

JOURNAL BEARINGS; DAMPING COEFFICIENTS; STABILITY ANALYSIS; DESIGN; STIFFNESS; SCALE;

D O I：

10.1007/s00542-015-2487-6

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The performance of a gas-lubricated micro spherical spiral groove bearing (MSSGB) with slip flow effect is investigated. A modified Reynolds equation incorporated with Barber's first-order slip flow model is proposed to investigate the flow characteristics of gas in MSSGBs. Parameter transformation and oblique coordinate transformation are applied to eliminate the curve effect on the calculation domain. An improved finite difference method (FDM) based on Green's formula is used to solve the Reynolds equation. The perturbation method is adopted to determine the dynamic coefficients. The effects of slip flow and bearing parameters, including the groove depths, rotor speeds, and eccentricity ratios, on the bearing characteristics are investigated and discussed. Prediction results show that the slip flow effect on MSSGB performance is significant. Moreover, the groove depth at micro clearance has a crucial influence on bearing performance.

引用

页码：387 / 399

页数：13

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