A PREDICTION OF RELIABILITY OF SUCTION VALVE IN RECIPROCATING COMPRESSOR

摘要

A suction valve is a very important element in reciprocating compressor. And because of the shape of the reed valve its reliability is taken up a subject for discussion and sometimes it is main source of bad product. Because the reliability of the suction valve is directly related to the stress acted on it, the stress and reliability analysis should be carried out in design stage.In this study, the maximum stress and the maximum impact value acted on the suction valve of reciprocating compressor were analyzed by using the commercial nonlinear dynamic structural analysis program LS DYNA3D. The stress acted on the suction valve was measured by the experiment of bolted-case test using the strain gage. In order to investigate more accurately the motion of the valve in air, the displacement of the valve was measured by the laser sensor and the stress of the valve was measured by the strain gage in open-shell state. These were used in making relations between the displacement and the stress.The displacement-stress relationship was used in measuring the displacement of the valve in real cycle. And the maximum impact value was analyzed by experiment.The maximum stress analyzed by FEM was compared with the allowable stress of the material of the valve. The maximum impact value analyzed by FEM and the experiment was compared with the allowable impact value of the material of the valve.