Rotating pneumatic vane motor with air bearing

US5064361A · kind A · utility

Assignee

• Schmid u. Wezel · DE

Inventors

• Michael Kristof · Gondelsheim, DE
• Josef Mueller · Großkarlbach, DE

Key dates

• Filing date: Apr 5, 1990
• Grant date: Nov 12, 1991
• Expiry date: Apr 5, 2010

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04C18/348
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A compressed-air vane motor comprises a rotor which is mounted on anti-friction bearings and has, distributed over the periphery, location slots in which vanes are guided in a radially displaceable manner and whose outer sealing edges bear by centrifugal force against the inner surface of the cylindrical outer shell. To reduce wear and friction, and to achieve a long service life when operating with oil-free compressed air, the outer shell, which is displaced eccentrically relative to the rotor, is rotatably guided in a housing and is driven along by the friction between the vanes and the outer shell, and the cylindrical outer shell is rotatably mounted in the housing by at least one air bearing and to this end is accommodated with little radial clearance in an approximately circular-cylindrical guide bore of the housing. In order to further reduce wear, at least one air pocket is provided and is open toward the outer shell in the housing. The axial length of this air pocket corresponds to the axial length of the encircling outer shell.