Vibration prediction and experimental validation of a rotary compressor based on multi-body dynamics

In this study, an equivalent multi-body dynamics model of a rotary compressor for a household air-conditioner is established to predict its vibration responses when eccentric masses on the crankshaft, cyclic gas loads, torque ripple of the motor, connections with rubber washers, and the intake tube and exhaust tube are considered. Practical experiments for measuring the vibration acceleration of the compressor are conducted to validate the reliability and equivalence of the established model. The design of experiments method is employed to determine the optimal counterweights. This study determines the gas loads required to be considered in the counterweight design to attenuate the compressor vibration effectively. In addition, an optimal assembly angle for two counterweights is attained to reduce the compressor vibration.