Numerical Simulation Analysis Of Multi-hole Regulator Based On Workbench

The regulating valve is one of the indispensable components in the industrial control system.It plays a decisive role in the reliability of the system by controlling flow,stabilizing pressure and throttling.With the development of science and technology,the actual conditions of the valve performance,precision and other requirements are constantly improved.This paper takes the multi-hole control valve as the research object and focuses on numerical simulation.Combined with theoretical analysis and experimental research,the flow characteristics,pressure in the internal flow field,noise in the valve and the deformation of the valve in the coupling field are studied.The main contents are as follows:(1)It mainly USES Bernoulli equation to calculate flowmeter formulas of different hole types,and designs two kinds of multi-hole control valves that conform to linear flow characteristics and equal 100 types.The flow of multi-hole control valve was simulated numerically by Workbench,and the configuration of throttling hole on the sleeve was corrected.At the same time,the flow characteristic curve,velocity and pressure distribution of the two control valves are also obtained.From the velocity and pressure cloud diagram,the maximum velocity and medium pressure at the throttle hole are obviously decreased,and the multi-hole throttle hole has better throttling and depressurization functions.Two kinds of multi-hole control valves were tested on the circulating flow parallel test platform.The flow characteristics of the two kinds of valves are obtained through the test,and compared with the simulation results,and the reasons for the errors are analyzed.(2)The noise theory of multi-hole control valve is studied;Moreover,the noise of the valve was simulated numerically by Workbench platform.The main contents include: first,the analysis of the natural frequency of the regulating valve;second,the noise evaluation of the corresponding reference point.Firstly,the natural frequencies of the sixth mode under several opening degrees are analyzed.Then,the monitoring point of calculated noise is set by the obtained turbulent kinetic cloud image,and the sound pressure level curve and one-third frequency multiplication diagram of the monitoring point under the corresponding opening degree are obtained,so as to obtain the main frequency distribution range.Finally,the natural frequency of the regulating valve is compared with the distribution range of the main frequency,and the natural frequency is not within the distribution range of the main frequency.Therefore,the valve in the above several degrees of work,will not produce resonance phenomenon.(3)Using Workbench analysis platform,numerical simulation analysis of flow field,temperature field and structure statics(heat-fluid-solid coupling)of multi-hole regulator under different opening degrees was carried out.The general deformation,radial deformation of valve plug and sleeve are obtained,and the temperature of medium is the main factor affecting the deformation of valve internals.Through the numerical simulation of the gap between the valve plug and the sleeve mating surface,it can be judged whether there will be jamming phenomenon between them.By analyzing the flow characteristic,noise and the heat fluid-structure coupling deformation of the multi-hole control valve,it has certain guiding significance for the analysis of the internal flow field and the optimization of the structure of the control valve and the setting of the assembly size of the valve plug and sleeve mating surface.