The Dynamic Behavior of Valve Reeds in Reciprocating Gas Compressors - Analytical Study

Aspects of the static and dynamic behaviour of valve reeds were considered. Initially static deformation and stress in a cantilever suction valve reed were calculated using the finite element method. Some useful conclusions were drawn despite the .neglect of dynamic effects. The free vibration of a cantilever reed was derived using the same method. The computer program used, DRST4, was examined in relation to convergence of solution. The results were compared with those obtained by other (Rayleigh) methods and with experimental values obtained by laser holography, The finite element method was then applied to predict the dynamic motion and S"bress patterns in a cantilever suction valve reed in response to the pressure-time history in a compressor during the suction phase ~f the cycle. Another program, RESP95ST, was used in conjunction with DRST4. The predicted values under dynamic conditions appeared to be reasonable and logical: predicted displacements are compared with experimental values in a sequential paper.