SCROLL COMPRESSOR

摘要

A small-sized scroll compressor, in which a key is enhanced in strength without an increase in ring width, ring diameter and key width of an Oldham's ring. The Oldham's ring (31) is constructed such that an elliptical ring (31a) having a major axis and a minor axis in a first diametrical direction (X axis) and in a second diametrical direction (Y axis) is turned at predetermined angles in a direction opposite to the direction of shaft rotation to provide a rotated elliptical ring (31b) on x and y axes, and first keys (34, 35) in the first diametrical direction and second keys (37, 38) in the second diametrical direction are provided on the rotated elliptical ring (31b) to face each other. With the arrangement, the Oldham's ring (31) is not enlarged in ring width, ring diameter and key width and is shortened in arm length from points of stress concentration at key roots on the sides where the respective keys bear loads. Therefore, the key is decreased in bending moment to suppress vibrations at the time of high-speed and high pressure operation and improve durability at key portions.