Active lubrication applied to radial gas journal bearings. Part 1: Modeling

Stefano Morosi; Ilmar Santos

doi:10.1016/j.triboint.2011.08.007

Active lubrication applied to radial gas journal bearings. Part 1: Modeling

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Abstract

Active bearings represent a mechatronic answer to the growing industrial need to high performance turbomachinery. The present contribution aims at demonstrate the feasibility of applying active lubrication to gas journal bearings. The principle of operation is to generate active forces by regulating radial injection of lubricant through the means of piezoelectric actuators mounted on the back of the bearing sleeves. A feedback law is used to couple the dynamic of a simplified rotor-bearing system with the pneumatic and dynamic characteristics of a piezoelectric actuated valve system. Selected examples show the considerable performance advantages of such new kind of bearing.

Original language	English
Journal	Tribology International
Volume	44
Issue number	12
Pages (from-to)	1949-1958
ISSN	0301-679X
DOIs	https://doi.org/10.1016/j.triboint.2011.08.007
Publication status	Published - 2011

Keywords

Active lubrication
Fluid filmbearings
Active vibrationcontrol
Mechatronic system

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abstract = "Active bearings represent a mechatronic answer to the growing industrial need to high performance turbomachinery. The present contribution aims at demonstrate the feasibility of applying active lubrication to gas journal bearings. The principle of operation is to generate active forces by regulating radial injection of lubricant through the means of piezoelectric actuators mounted on the back of the bearing sleeves. A feedback law is used to couple the dynamic of a simplified rotor-bearing system with the pneumatic and dynamic characteristics of a piezoelectric actuated valve system. Selected examples show the considerable performance advantages of such new kind of bearing.",

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AB - Active bearings represent a mechatronic answer to the growing industrial need to high performance turbomachinery. The present contribution aims at demonstrate the feasibility of applying active lubrication to gas journal bearings. The principle of operation is to generate active forces by regulating radial injection of lubricant through the means of piezoelectric actuators mounted on the back of the bearing sleeves. A feedback law is used to couple the dynamic of a simplified rotor-bearing system with the pneumatic and dynamic characteristics of a piezoelectric actuated valve system. Selected examples show the considerable performance advantages of such new kind of bearing.

KW - Active lubrication

KW - Fluid filmbearings

KW - Active vibrationcontrol

KW - Mechatronic system

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DO - 10.1016/j.triboint.2011.08.007

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Active lubrication applied to radial gas journal bearings. Part 1: Modeling

Abstract

Keywords

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