MULTI-CYLINDER RORARY COMPRESSOR

摘要

A multi-cylinder rotary compressor is constructed by receiving in a sealed chamber (1) a rotating shaft (4), an electric motor section (3), and first to third compression mechanism sections (2A-2C). The rotating shaft (4) is rotatably supported by bearings (9, 11). The electric motor section (3) and the first to third compression mechanism sections (2A-2C) are connected to the rotating shaft. The compression mechanism sections (2A-2C) respectively have cylinder chambers (14a-14c) in which eccentric sections (4a-4c) and eccentric rollers (13a-13c) provided on the rotating shaft are received, cylinders (8A-8C) having the cylinders chambers, and blades (15a-15c) of which each head edge is in contact with the peripheral surface of the eccentric roller to partition the cylinder chamber into two. At least one of the two clearances (Sa, Sc), out of clearances (Sa, Sb, Sc, Sd) in sliding sections of the compression mechanism sections, of the second compression mechanism section (2B) not in contact with the bearings is set greater than the clearances (Sb, Sd) in the first and third compression mechanism sections (2A, 2C) in contact with the bearings. Run-out of the rotating shaft involved in its rotation can be reduced to improve compression efficiency.