2016年4月7日星期四

The Natural Frequency Analysis of Pressure-reducing Valve


Based on the explanation of the work principle of pressure-reducing valve of rocket motor,the computing model of the vibration of the Heater Gas Valve valve was established not considering the damp effect of fluid,that is single degree of freedom natural vibration.By using mutual acting principle of force,the membrane and heater valve disc acted by uniform pressure were analyzed separately,the vibration formula of the motion parts of the pressure-reducing valve was obtained,the computation formulae of the equivalent stiffness of the membrane acting as spring,the equivalent single force of the uniform pressure caused by turbulence,and the natural frequency were derived.Each parameter,which affects the level of the natural frequency,was analyzed.The derived computation formula of the natural frequency can be used broadly,it is more simple,precise than finite element method,and more suitable for engineering.

2016年4月3日星期日

The classification of the gas valves


1 door-shaped DKL fitting cut: off pieces move along the seat center. 2 gate shape: off pieces to move along the vertical seat center of Gas Water Heater Valve. 3 cock and ball: ball plunger or closure member is rotating around the center line itself. 4 Swing type: off pieces around the hydraulic hose ends outside of the valve shaft rotation. 5 dish: off pieces of the disc around the axis of rotation of the Gas Valves For Patio Heater seat. 6 spool type: sliding closure member in a direction perpendicular to the channel.