Abstract
The occurrence of periodic self-rotation of the orbiting scroll in a scroll compressor having an orbital mechanism composed of a ball coupling and an eccentric bushing was reported in our previous paper. In the present study we investigated the self-rotational motion of the orbiting scroll in detail. Complex motion of the orbiting scroll and the eccentric bushing was analyzed theoretically based on equations of motion. The motion was also measured experimentally using an optical method, at various operating pressures and magnitudes of clearance at the ball coupling of the compressor. Positive and negative self-rotation of the orbiting scroll during one revolution of the compressor was clearly demonstrated, and the experimental results agreed well with the results of the theoretical analysis.
