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Zhai H.,Hefei University of Technology | Zhong H.,Hefei University of Technology | Sun Y.,Hefei University of Technology | Liu Z.,AVICI Jianghuai Aviation Oxygen Supply and Refrigeration Equipment Co. | And 2 more authors.
Zhongguo Jixie Gongcheng/China Mechanical Engineering

The press variation loaded on metal crinkle diaphragm was studied based on analysis of the new relieve valve operation process. The bond graph described the relieve valve dynamic feature was presented to set up the state space equation, from which the simulation results were calculated based on the Lunge-Kutta methods to express that the crinkle diaphragm will be loaded 21 MPa at the beginning of the relieve press procedure, and the press will be 3.43 MPa after 0.06 s, the valve core space will be 3.165 mm after 0.08 s. A crinkle diaphragm solid finite element model was built up, and stress and deformation with the maximal press 21 MPa was computed, and creep process was simulated to estimate the diaphragm invalidation or not according to the Norton theoretic model. The experimental results are better conformability with the simulation ones. The conclusion expresses that the new crinkle diaphragm will be plastic deformed when loaded on 21 MPa, and creep after long term higher press. But the diaphragm will be also available after plastic deformation, and the creep diaphragm deformation and stress will be stable loaded with 21 MPa after 1.4256 × 106 s, and also work normally. The simulation method offers good help to the new relieve valve design. Source

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