Author(s): CHANG Xuesen, PING Hui, YAO Yao, GUO Liying
Pages: 25-28,33
Year: 2015 Issue:  6
Journal: Fluid Machinery
Keyword:  tri-eccentric butterfly valve; coupling; sealing of back flow pressure; nonlinear finite element;
Abstract: The sealing contact analysis of tri-eccentric butterfly valve was carried out by nonlinearity finite element method u-sing the software ANSYS under the condition of diameter DN300 with a back flow pressure PN3.5MPa in this paper.The stress and strain diagrams of butterfly valve on the condition of the back flow pressure were obtained from the result both with and with-out preloading.Through the analysis of finite element calculation results,the appropriate preloading of the valve plate enough to withstand the back flow pressure and ensure the sealing of valve was obtained,by the excursion of the theoretical assembly position of the tri-eccentric butterfly valve shaft.All these studies are useful to the design on bi-directional drop-tight tri-eccentric butterfly valve.%