MODELING OF COMPRESSOR VIBRATION FOR IMPROVED DYNAMIC DESIGN

摘要

The two main sources contributing to scroll compressor vibration at running frequency are the residual rotational unbalance in the crank-rotor assembly and the reciprocating force due to the Oldham ring. The intent of this paper is to develop a rigid body model of the compressor vibrating on resilient grommets. This model is a design tool capable of identifying the sensitivity, of the steady-state vibration levels, to manufacturing process tolerances of counterweight and crank-rotor parts. Other capabilities of the model include prediction of transient start-up vibration thus identifying key parameters for its control. Also using this model one can predict any potential resonances that could occur with new compressor design supported on standard grommets; this enables us to modify the existing grommet designs to tune away the resonances and also provide the vibration isolation desired.