Author(s): CHEN Sun-yi
Pages: 70-74
Year: 2015 Issue:  3
Journal: Hydraulics Pneumatics & Seals
Keyword:  seal; flat-plate diaphragm; spherical shape diaphragm; stress analysis; tube channel; heat exchange;
Abstract: In order to provide basement for engineering design, membrane stress, bend stress and synthesize stress of diaphragms under pres-sure of tube channel are analyzed by formulas, which include both of the circular flat-plate diaphragm and the spherical shape diaphragm. Calculation and compare of stresses are combined with case. The results are show that when perimeter of flat-plate diaphragm is fix support, its bend stress is from tension stress change into compress stress as radial far from diaphragm center. But no matter the perimeter of spheri-cal shape diaphragm is fix support or simple support, all of the stress is always compress stress, and radial synthesize stress is always greater than circumferential synthesize stress. When perimeter of spherical shape diaphragm is fix support, stress lever nearby perimeter is low, radi-al synthesize stress is close to circumferential synthesize stress, and bend stress at perimeter is equal to zero. In a word, it is conclude that the spherical shape diaphragm is superior to the circular flat-plate diaphragm. Some points about diaphragm structure are suggested.