Discharge valve mechanism for an electrodynamically oscillating compressor is different in comparison to that of a conventional reciprocating compressor. It has a larger discharge port area, heavier valve mass and stiffer valve spring comparing to those of reciprocating type. Since the motion of piston is not kinematically restricted as in conventional reciprocating compressors, discharge valve can be impacted on piston occasionally.
This work deals on dynamic analysis of a discharge valve after considering all of those different characteristics. Dynamic model for a discharge valve was constructed. Impact was considered by spring-mass model and the pressure fluctuation at the both sides of the valve is also included after considering the discharge port area and valve spring preload. It is assumed that piston moves in the region of between top and bottom dead center not by calculating piston motion from an electrodynamic equation but by getting values through experiment. Discharge pressure fluctuation is calculated by using Helmholtz modeling. Finally, dynamic model for a discharge valve was constructed.
In order to assure the model analysis results, the valve motion is experimentally measured and compared to those of model analysis.
