THE INFLUENCE OF ORIFICE RESTRICTION ON THE STABILITY OF RIGID ROTOR-AEROSTATIC BEARING SYSTEM

被引：0
|
作者：
Chen, Cheng-Hsien
Yang, Ding-Wen
Kang, Yuan
Hwang, Ren-Ming
Shyr, Shrh-Shyong
机构：
来源：
PROCEEDINGS OF THE ASME TURBO EXPO 2009, VOL 6, PTS A AND B | 2009年
关键词：
Aerostatic bearing; Reynolds equation; Stability threshold; Whirl ratio; JOURNAL BEARINGS; AIR BEARINGS; GAS; PERFORMANCE;
D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
This paper has studied the influence of the restriction effect on the stability of a rigid rotor in rotation supported by double-raw, orifice compensated aerostatic bearings. The air which is assumed to be perfect gas, passes through orifice restrictor into the bearing clearance undergoing the adiabatic process is governed by Reynolds equation including the coupled effects of wedge due to spindle rotation and squeezed film due to journal oscillation. The Ph-method is used to analyze Reynolds equation and which is then solved by the finite difference method and numerical integration to yield static and dynamic characteristics of air film. The motion equation of the rotor-bearing system is obtained by using the perturbation method and the eigensolution method is used to determine the stability threshold and critical whirl ratio. The variations of stability threshold of both critical inertial force and critical whirl ratio with restriction parameters are analyzed for various whirl ratios, speed of journal rotation and eccentricity ratios.
引用
收藏
页码：909 / 917
页数：9
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