Study On The Pressure And Speed Control Characteristics And Structural Parameters Optimization Of A New Type Of Hedge Maze Element

As an important control equipment in modern process industry,the research and development work of high pressure regulating valve is less in China at present.In this paper,the internal core throttling element of a new type of hedge maze high pressure regulating valve is studied.This type of throttling element represents the development direction of high-end category regulating valve.Therefore,in this paper,the existing disk-type maze flow channel theoretical model is used to analyze the mechanism of its pressure and speed control,and the design optimization criteria of the new offset maze throttle element are established by means of experiment and numerical simulation,and the main conclusions are as follows:(1)Based on Bernoulli equation,the basic theoretical model of throttle element step-down and speed control under incompressible condition is established by introducing the exit energy limitation criterion.(2)Design experiment device,measured new hedge maze throttling element local resistance coefficient value,has been clear about the step-down the quantity relationship between the series and step-down ability,proved that the series and the pressure capacity is a linear correlation between,get a full throttle unit of step-down speed model,which laid a foundation for subsequent numerical simulation calibration.(3)An accurate numerical calculation model was obtained by the calibration of experimental results,and the internal velocity and pressure distribution law of the pressure control speed of the throttle element was verified.The analysis showed that the new type of offset throttle element had stable and good pressure reduction and speed control ability under different pressure boundary conditions.(4)The sensitivity of the structural parameters such as the offset channel diameter,the offset channel diameter expansion value and the outlet channel depth of the offset Angle to the average outlet velocity of the throttling element was investigated,and the significance of the influence of the structural parameters on the average outlet velocity was analyzed by the Box-Behnken response surface method.Taking the minimum outlet velocity as the optimization objective,the optimal structural parameters in the defined domain of the throttle element were obtained,and the correctness of the optimization direction and the reliability of the results were verified.The step-down and speed control model of the new type of offset throttle element and the optimization results of structural parameters will provide reference for the design and manufacture of this type of valve and provide a solid foundation for the final solution of the domestic reality problem that this type of valve depends on the import.