Modelling pressure cycle and interaction with reed valves in a reciprocating compressor
Résumé
Automatic reed valves (suction and discharge) in a reciprocating compressor
are noise sources due to free vibrations and structure impacts on limiters and valve seat
during a pressure cycle. Understanding the noise source generation and propagation needs
a well-modelled pressure cycle in the compressor. Modelling the pressure behaviour in
a cylinder requires a robust thermodynamical/mechanical model in which both physics
interact. A Piao-McLinden model is proposed here to simulate the behaviour of a real gas
like refrigerant. The motion of the valves is formulated as a one dimensional damped massspring
system characterized by means of a Rayleigh method. Each model is compared
to experimental data before simulating the whole coupled system: compressor gas/reed
valve motion.