Aerodynamic journal bearing with a flexible, damped support operating at 7.2 million DN
| Autor: | Tobias Waumans, Jan Peirs, Dominiek Reynaerts, Farid Al-Bender |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Engineering
Bearing (mechanical) Series (mathematics) business.industry Mechanical Engineering Mechanical engineering Aerodynamics Experimental validation stability Stability (probability) Turbine Electronic Optical and Magnetic Materials law.invention Damper Air bearing Mechanics of Materials Control theory law high speed Electrical and Electronic Engineering air bearings business |
| Zdroj: | Journal of Micromechanics and Microengineering. 21:104014 |
| ISSN: | 1361-6439 0960-1317 |
| DOI: | 10.1088/0960-1317/21/10/104014 |
| Popis: | This paper reports on the design, development and experimental validation of an aerodynamic journal bearing with a flexible, damped support operating at speeds up to 1.2 million rpm (= 7.2 million DN). In terms of the DN-number, this achievement represents to our knowledge a record for an air bearing of the self-acting type. Stabilization by means of a flexible, damped support therefore proves to be a promising solution to the dynamic stability problem of high-speed gas bearings. In order to select the support parameters in an optimal way, a stability study is performed leading to the formulation of a series of dimensionless design guidelines. The proposed implementation, which makes use of elastomeric O-rings in combination with a tunable squeeze-film damper, is discussed in detail. A method for the manufacturing of miniature bearing bushes with a wave-shaped film height profile is outlined. Experiments up to 683 280 rpm are performed with an air-driven turbine and up to 1 203 000 rpm with a helium-driven turbine. Deceleration experiments are conducted in order to obtain an estimation of the frictional losses of the system. ispartof: Journal of Micromechanics and Microengineering vol:21 issue:10 ispartof: location:BELGIUM, Leuven status: published |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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