Bearing arrangement

US5775816A · kind A · utility

Assignee

• SIHI GmbH & Co. KG · DE

Inventors

• Bodo Baranek · Wilster, DE
• Ralf Mann · Huje, DE
• Rainer Landowski · Freiherr-vom-Stein-Straße, DE

Key dates

• Filing date: Jun 6, 1997
• Grant date: Jul 7, 1998
• Expiry date: Jun 6, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S384/905
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A device is proposed for centering a bearing bushing on a shaft wherein the bushing is made of a material, such as a ceramic, that is sensitive to tensile stress. At lower operating temperatures the bushing exhibits a degree of play relative to the shaft, but is play-free relative thereto at high operational temperatures. Correct centering of the bushing is ensured even in the higher temperature range by the provision of a pair of centering rings which are connected to the shaft without play and act on the bushing to center it. The centering rings are made of a material which, in comparison to the bushing, is not sensitive to tensile stress. It is expedient to provide the two centering rings at the end faces of the bushing. The clamping action of the centering rings on the bushing assures rotational pull of the bushing at low operating temperatures. The thermal expansion of the bushing and its associated clamping members approximately equals that of the corresponding shaft section to provide a butting driving connection between the shaft and the bushing at the higher operating temperature range.