Abstract: A vane type rotary compressor comprising a housing having a cylindrical inner wall surface, a rotatable sleeve disposed in the housing for rotation about its own longitudinal axis, a rotor disposed in the sleeve for rotation about its own longitudinal axis, which is offset from the longitudinal axis of the sleeve, and a plurality of vanes carried by the rotor to extend in radial directions and maintained in contact with the inner surface of the sleeve to divide the interior of the sleeve into a plurality of working chambers. The rotatable sleeve is made of an Si-Al type alloy containing 12 to 25% by weight of Si. The sleeve is age hardened and provided with an anodic oxidation coating. A further coating of wear resistant resin may be provided on the outer surface of the sleeve.

Abstract: A rotary compressor comprises a housing having a cylindrical inner wall surface, a rotatable sleeve having an inner and outer surfaces and disposed in the housing for rotation about a first longitudinal axis, a rotor disposed in the sleeve for rotation about a second longitudinal axis which is offset from the first longitudinal axis, a plurality of vanes carried by the rotor to extend substantially in radial directions and having radially outer edges maintained in contact with the inner surface of the sleeve so that the sleeve is rotated as the rotor and the vanes rotate. One or each of the inner wall surface of the housing and the outer surface of the sleeve has a coating comprised of a wear-resistant resin dispersed with 10 to 120 volume part of a solid lubricant and 5 to 50 volume part of metal flakes for 100 volume part of the resin.

Abstract: The disclosure relates to a method of forming aluminum coating layer on surface of a ferrous base alloy workpiece which includes the steps of applying onto the surface of the ferrous base alloy workpiece a coating solution containing 50 to 90% by weight of aluminum or aluminum alloy particles and 10 to 50% by weight of synthetic resin having a high decomposition burning temperature with slow burning speed and being soluble in a solvent at normal temperature, with subsequent drying to form a resin coating layer containing aluminum on the surface of the ferrous base alloy workpiece, and then subjecting the workpiece thus treated to heating up to temperature higher than melting point of the aluminum or aluminum alloy particles so as to form an Al plated coating layer on the surface of the ferrous base alloy workpiece.