Development of high-speed micro-gas bearings for three-dimensional micro-turbo machines

被引：34

作者：

Isomura, K

Tanaka, S

Togo, S

Esashi, M

机构：

[1] Ishikawajima Harima Heavy Ind Co Ltd, Tokyo 1888555, Japan

[2] Tohoku Univ, Dept Nanomech, Aoba Ku, Sendai, Miyagi 9808579, Japan

[3] Tohoku Gakuin Univ, Dept Mech Engn, Tagajo, Miyagi 9858537, Japan

[4] Tohoku Univ, New Ind Creat Hatchery Ctr, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

JOURNAL OF MICROMECHANICS AND MICROENGINEERING | 2005年 / 15卷 / 09期

关键词：

D O I：

10.1088/0960-1317/15/9/S08

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：

A micro-high-speed bearing test rig has been designed and fabricated to develop air bearings for a micro-machine gas turbine. The micro-machine gas turbine requires bearings of diameter 4 mm to operate stably at 870 000 rpm. Based on the preliminary analysis, it has been found that a large bearing gap and very high rotor balance are required to achieve low viscous loss at high speed and to prevent the rotor from hitting the bearing at critical speed. Therefore, a hydro-inertia gas bearing has been selected with half-split bearing sleeves. A hydro-inertia bearing is a type of static air bearing which has large bearing clearance to generate supersonic flow in the bearing gap. Currently, a rotor speed as high as 770 000 rpm has been achieved in the test.

引用

页码：S222 / S227

页数：6