Dynamic model for the orbiting scroll based on the pressures in scroll chambers – Part II: Investigations on scroll compressors and model validation

This two-part study proposes a dynamic model for the orbiting scroll based on the pressures in scroll chambers. Part II investigates scroll compressors by using the dynamic model developed in this work to predicate the dynamic characteristics of the scroll compressors and the dynamic model is validated by comparing the predicted results with the experimental results of the powers of two air scroll compressors. This study utilizes two air scroll compressors and ten virtual scroll compressors to investigate the pressure distribution on the wrap surfaces of orbiting scrolls, the component forces and moments of orbiting scrolls, the overturning moment of the scroll mechanism, and the theoretical driving power of scroll compressors. The effects of scroll type (such as modified-wrap scroll, truncated-wrap scroll, single-wrap scroll, multi-wrap scroll, odd-wrap scroll, and even-wrap scroll) on the dynamic performance of the scroll compressor based on the pressures in scroll chambers are also analyzed.

► Investigations on scroll compressors by the developed dynamic model were performed.
► Experimental investigations on two air scroll compressors were performed.
► The dynamic model developed in this work was validated.
► The multi-wrap scroll compressor has better dynamic performance at higher speed.
► The odd-wrap compressor has better dynamic stability than the even-wrap compressor.