Research Of Dynamic Performance And Fault Simulation About Reciprocating Compressor Valve

The main research contents of this paper are dynamic performance, fault simulation and vibration test of reciprocating compressor valve. Firstly, the law of motion curves for valve plate and gas flow speed in play of valve are obtained by using theoretical analysis. Secondly, the impact stress of valve plate and the impact response of valve are calculated by using numerical simulation, further more, the stress distribution of valve plate and distinction spectrum of valve fault are obtained. Lastly, the selection principle of parameter in valve vibration test and the components of tested spectrum are obtained by using experimental study.According to the research of valve dynamic performance, the curves of displacement, velocity, pressure loss are calculated. And the gas flow speed in play of valve could be calculated too. In terms of the impact speed obtained in calculation of valve plate velocity curve, the impact stress and the distribution of stress in impact process can be obtained by using the software named ANSYS/LS-DYNA. Comparing the calculation results with the theoretical value, it is convinced that the value of finite element calculating is reliability. In terms of the impact load value calculated by ANSYS/LS-DYNA, the impact responses under both normal condition and lacking of spring forces condition are calculated by using the structural dynamics module of software named ANSYS. Compared with the responses tested in experiment, the result shows that the main response spectrum of acceleration increases obviously under the condition of lacking spring forces., and the this law agrees with the experimental results. The results of vibration test show that the high frequency component caused by valve plate impacting can not be tested by selecting displacement or velocity, but the acceleration spectrum with high upper limit can test the vibration caused by pressure pulsation and valve plate impacting. And the research results can offer some references for design, condition monitoring and vibration test of valve.