Scroll Compressor Dynamics : 2nd Report, The Compliant Crank and the Vibration Model

Abstract

The compliant crank mechanism is employed for the scroll compressor to realize a tangential sealing. This paper presents a theoretical model for a scroll machine with a variable radius crank. The analytical expression is obtained for the radial sealing force. The Oldham coupling motion is transmitted to the orbiting scroll. The force and the torque which act on the rotating and stationary members of the compressor are shown. A simple tangential vibration mode is introduced and examined numerically.