Hydroinertia Gas Bearing System to Achieve 470m∕s Tip Speed of 10mm-Diameter Impellers-Reference-Cited by-同舟云学术

Hydroinertia Gas Bearing System to Achieve 470m∕s Tip Speed of 10mm-Diameter Impellers

Published:2007-01-16 Issue:3 Volume:129 Page:655-659
ISSN:0742-4787
Container-title:Journal of Tribology
language:en
Short-container-title:

Author:

Tanaka Shuji¹,Esashi Masayoshi¹,Isomura Kousuke²,Hikichi Kousuke³,Endo Yuki³,Togo Shinichi³

Affiliation:

1. Department of Nanomechanics, Tohoku University, 6-6-01 Aza Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan

2. Research & Engineering Division, Engine Technology Department, Aero-Engine & Space Operations, Ishikawajima-Harima Heavy Industries Co. Ltd., 3-5-1 Mukodai-cho, Nishi-Tokyo, Tokyo 188-8555, Japan

3. Department of Mechanical Engineering, Tohoku-Gakuin University, 1-13-1 Chuo, Tagajo, Miyagi 985-0873, Japan

Abstract

A microbearing tester driven by an air turbine of 10mm diameter has been developed, and successfully used to test hydroinertia gas bearings with a shaft of 4mm diameter. The effects of bearing gas pressure conditions and bearing length to diameter ratio (L∕D) on the maximum achievable rotation speed were investigated. The maximum rotation speed of 890,000rpm, which corresponds to the DN number (the product of a shaft diameter in millimeter and a rotation speed in rpm) of 3,560,000, was achieved. At 890,000rpm, the tip speed of the turbine reaches approximately 470m∕s. Using the bearing system developed, the turbo components of a 100W class gas turbine and an air pump for 1kW class fuel cells can be tested.

Publisher

ASME International

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials

Link

http://asmedigitalcollection.asme.org/tribology/article-pdf/129/3/655/5940967/655_1.pdf

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