Stability research of externally pressurized gas bearings for the cryogenic expansion turbine

✍ Scribed by Chen Chun-Zheng; Xia Xiang-Zu

• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 311 KB
• Volume: 26
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(86)90088-3

✦ Synopsis

This Paper describes the research results of some externally pressurized (EP) gas bearings for the medium-pressure cryogenic expansion turbine. The experimental EP bearings consist of rigidlymounted and flexibly-mounted types, which include various configurations with radial and tangential feed-holes. The effects of some factors on the instability onset speed, nc, have been investigated and the nc-2Cr characteristic curves have been obtained. A comparison between the nc-2Cr curves of different configurations of EP gas bearings shows that three configurations exist which possess not only higher stability, but also excellent nc-2Cr characteristics. Recently, they have been successfully applied to the cryogenic expansion turbines.