Vibration-Acoustics Study of R410A Rotary Compressors

This paper demonstrates a typical process to investigate the vibro-acoustic behavior of R410A rotary compressors. The compressor shell is usually the main noise radiator in a rotary compressor. However, the accumulator shell can be a significant noise source as well, although its size is relatively small. Sound performance of a rotary compressor is affected not only by the dynamic characteristics of the compressor and accumulator shells, but also by the baseplate and connecting structures between the accumulator and compressor shell (e.g. bracket, strap and suction pipe). The influence of the baseplate and the connecting structures can be significant at low frequencies because rigid-body vibration dominates the motions of the compressor and accumulator shells.