Simulation of Uneven Pressure Limit Detection of Hydraulic Valve Sealing Structure
Due to the strong dynamicity of water flow,there can be significant changes in the flow field informa-tion between the current and previous moments,leading to noticeable pressure fluctuations in waterproof valves,so it is difficult to detect their limits.Therefore,a method of detecting non-uniform pressure limits for the sealing structure of waterproof valves for water conservancy was put forward.Based on the flow field information of the water body between the current and previous moments,the degree of pressure fluctuation was determined,and then a non-uniform pressure grid for the sealing structure was generated adaptively.On this basis,a double-beam rhombus detection ma-trix was designed by using fiber Bragg grating sensing technology.Meanwhile,the temperature interference resistance of the method was optimized.Finally,a pressure limit detection model that connects tightly to the valve sealing struc-ture through snap fasteners was built,for detecting the pressure limits corresponding to the non-uniform grid.Experi-mental results verified that the proposed method can detect the pressure limit of each grid successfully and stably,with a maximum absolute error of less than 0.2 MPa.
Water conservancy engineeringWaterproof valveSealing structureUneven bearing pressureDe-tection of pressure limit detection
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