22 Anti - rotation using a rolling balls thrust, and a compressor of a spiral type using this mechanism

摘要

P a mechanism anti - rotation is made of a ball bearing abutment comprising a first section of a rolling track having an annular shape, a second section of track arranged in an eccentric position so as to come opposite the first section of a rolling track, at intervals, and the balls of a stop (69) interposed between the first and second sections of track. The first and second sections of track have grooves for receiving balls (123), formed respectively in their opposite surfaces. Each of the grooves for receiving balls (123) comprises a central part (127) and a bottom portion of the groove (129) around the - ci. When the radius of curvature of each ball abutment (69) is represented by rb, while the radius of curvature of the bottom portion of the groove of the inner side is shown by the cylinder, and that its radius of curvature of the outer side is shown by rext, the groove for receiving balls has a shape which satisfies the relationship rb = rin rext. / p