Design Simulation and Experimental Study of High Pressure Double Protection Single Seat Control Valve
To address the buck noise and the issue that excessive media flow rate could affect the valve seat and spool seal and product service life,research and design of a high-pressure double protection single-seat control valve with longer service life and less noise are presented.The noise-reducing valve cage formed by the internal and external noise-reducing cages and the cylinder cover of the valve seat connection significantly reduces the impact wear on the sealing surface,the spool and the valve seat caused by the excessive media flow rate.The gas scouring wear calculation model is established and the wear calculation expression is obtained.The simulation analysis of water vapor medium flow is carried out.Pressure,velocity,temperature,density,Mach number,acoustic power and acoustic energy level clouds are obtained for each parameter and parameter variation.The kinematic simulation of the spool opening is performed and linear displacement,velocity and acceleration curves are obtained.Static strength and fatigue strength simulations are performed for the spool and seat,and the load factors are 5.259 and 7.045,both greater than 1,within the total number of lives,and the fatigue strengths all met the requirements for use.In the valve body pressure test,under a pressure of 22.5 MPa,no visible deformation and leakage of the pressurized part are observed within the holding time.In the seat sealing test,under a pressure of 0.35 MPa,leakage amount is 0.61 ml/min,which is less than the set value.The valve body pressure strength and sealing performance meet the requirements.
high voltagedouble protectionsingle seat control valvedesign simulationexperiment
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