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This article aims to adopt a modern design methods – finite element method Anthony Averett Jersey , a certain type of rubber soft seal butterfly valve design of the main difficulties of in-depth research and analysis Butterfly valves are widely used as a pipeline control equipment, its reliability , energy efficiency, manufacturing and operating costs for the national economy is of great significance . In the butterfly design, butterfly on how to reduce the flow resistance , flow resistance estimates butterfly Orlando Brown Jr. Jersey , butterfly water torque calculations, butterfly valve opening degree of each non- uniform load conditions and strength analysis , sealing the analysis and design of calculation has been difficulties . Traditional designs generally use test analysis and design manual inspection method , which not only time consuming , but also increased the design and manufacturing costs. This article aims to adopt a modern design methods – finite element method, a certain type of rubber soft seal butterfly valve design of the main difficulties of in-depth research and analysis :

( 1 ) describes the triple offset butterfly valve applications and significance Maxx Williams Jersey , describes the basic structure of butterfly , basic properties and characteristics , further pointed out that the current design of the main valve design methods and the main problems derived the research background and significance , elaborated with topics related to fluid theory ;

( 2 ) to establish a certain type of rubber soft seal butterfly parametric geometry , and the establishment of structural statics analysis of finite element simulation model to analyze the rubber soft seal butterfly valve in the fully closed state of stress and deformation results , according to the results of the analysis to improve the structure of soft rubber sealing butterfly valve Ronnie Stanley Jersey , and achieved good results ;

( 3 ) In order to analyze the fluid flow through the valve , the establishment of a method for calculating flow resistance coefficient of the finite element model, using Cosmosflow of pipeline pressure loss along the way to calculate the valve opening degrees in a variety of flow resistance coefficient by compared with the experimental values ??, prove that this analysis and calculation is valid ; proposes a can effectively reduce the flow resistance coefficient overcurrent butterfly plate surface , and the surface of this overcurrent flow resistance coefficient were verified ; established analysis butterfly finite element model of flow pattern and calculates a variety of opening the flow state , for each opening pressure Marlon Humphrey Jersey , flow rate and flow lines were analyzed ;

( 4 ) Based on working conditions butterfly pumping station to establish a fluid-structure interaction analysis of the finite element model and conduct a multi- opening conditions of the fluid-structure interaction analysis, the degree of opening of the valve in all the stress and displacement value to derive the valve is fully closed state of stress and strain largest state conclusions ; comparing the model calculated results with the theoretical torque water water torque results , obtained maximum torque when the water valve opening ; analysis and constant flow rate and compared under variable flow valve cavitation , obtained the degree of opening of each cavitation coefficient , obtained prone to cavitation situation ; proposed should be avoided before and after the high differential pressure valve working conditions in order to avoid cavitation point of view , and then propose several methods to prevent cavitation ; ( 5 ) using ANSYS software Mark Andrews Jersey , the establishment of a butterfly valve analysis of the finite element model , won the thickness direction of the compression ring and the radial displacement of dimensional change curve ; analysis of butterfly plate during rotation , made ??contact with the disc begins with the body 's best rotation , and proposed several improved sealing surface of the solution . In this thesis, using the finite element method, the presence of butterfly design strength Hayden Hurst Jersey , stiffness , flow resistance , flow pattern , seals and other aspects of a comprehensive analysis of the design for the realization of the valve design from experience that a gradual transition to the scientific design of great significance .