DOUBLE-CYLINDER ROTARY COMPRESSOR

摘要

PROBLEM TO BE SOLVED: To provide a double-cylinder rotary compressor having yield strength to a high-pressure gas. SOLUTION: In the double-cylinder compressor, a compression mechanism provided with a first and second cylinders successively disposed along the axial direction of a crankshaft and an electric motor connected to the crankshaft are provided in a cylindrical sealed container. Two lateral holes are made in the axial direction of the crankshaft so as to pass pipes for connecting gas-suction holes of the 1st and 2nd cylinders in the compression mechanism and the external part of the sealed vessel. A bulged part is provided on both sides in the peripheral direction with respect to the surface between the holes in the cylindrical part of the sealed container. The distance between the bulged part and the center of the cylindrical part is different from that in other cylindrical part. Tensile stress produced between the holes due to expansion of a case is loaded radially on the sealed vessel. Since the bulged part is plastically deformed in different distance from the center of the cylindrical part, the expansion of the case is not directly transmitted to the cylindrical parts between the holes, and this makes small the tensile stress exerted on the part between the lateral holes. The lateral holes made in the cylindrical part of the sealed vessel may be provided in the bulged part. COPYRIGHT: (C)2004,JPO&NCIPI