Metal Diaphragm Coupling Diaphragm Fatigue Life Calculation And Analysis

The laminated membrane coupling is a new type of flexible coupling with wide development. At present, there are the ring membrane, multiple-side membrane and varying-width ring membrane. The ring membrane has been widely applied in foreign country because of its simple structure and easy manufacture. Only little research and application are carried out in our country. With the development of society and demands of market, the people pay increasing attention to the membrane as well as its exacter fatigue life in order to meeting the needs of service.This thesis is based on the education and technology project of GANSU province-THE MEMBRANE FATIGUE LIFE EVALUATION AND TEST WORK IN THE LAMINATED MEMBRANE COUPLING. Some topic are discussed and researched. And it is a cooperating subject with Lanzhou Yingke petrochemical and limited corporation.Taken the ring membrane as a example, dynamic model is established. Using ANSYS's finite element programme four stresses of the membrane containing twist, centrifugal force, axial and angular flexion are calculated, and the results of four stresses are obtained such as deformation pattern for structure, distribution graph for nodal stresses and maximum stress. Besides, the paper analyses the effect of these stresses on the membrane fatigue life. Then three static average stress and the dynamic stre.ss are further studied. With the development of science and technology, a new method which calculates fatigue life was used , named local stress-strain method. And using it the fatigue life of membrane are evaluated by programming. The solution is comfortable compared with experiments. This is valuable to design, make and use membrane.Form showing a result of its longer fatigue life, the membrane can meet needs of production. But the design is too conservative so it is the future task for us to use anisotropic or nonmetallic material instead of expensive 1Cr18Ni9 stainless steel in order to lowering costs and raising economic efficiency. It is benefit tousage of popularization.