Rotary fluid machine having hollow vanes and refrigeration appar

Details Rotary fluid machine having hollow vanes and refrigeration appar Rotary fluid machine having hollow vanes and refrigeration appar

1990-07-26

1992-02-25

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Non-metallic working member, cylinder or partition

418 63, 418152, 418178, 418179, F04C 18356, F04C 2900

Patent

active

050908820

ABSTRACT:
A rotary compressor has a plate-like hollow vane disposed in sliding contact with a rotary piston. The vane has an internal cavity formed by a plurality of bores each having a substantially rectangular cross-section. The corners of each bore are each formed by a curved concave surface of a radius of curvature which is greater than the thicknesses of the outer walls of the vane. The major side surfaces of the vane are in slidable contact with opposing walls of a vane slot and have surface layers each formed of an oxide film consisting mainly of tri-iron tetraoxide (Fe.sub.3 O.sub.4). The film is finished by smoothing processing, thus attaining a smaller friction between the vane major side surfaces and the vane slot walls and suppressing local wear of the vane slot walls.

REFERENCES:
patent: 4944663 (1990-07-01), Iizuka et al.

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