Stability Analysis And Structural Optimization Design Of Hydraulic Automatic Tilting Gate

Because of the virtue of automatically switching, simple structure and low cost, etc, the hydraulic automatic tilting gates with connecting lever and rolling wheel have been wildly applied in all kinds of water conservancy and brought much economic benefit. At the same time, they also have the unstable phenomenon such as continually swinging, flapping and complicated hydraulic factors. The stability analysis and structural optimization design of the hydraulic automatic tilting gates with connecting lever and rolling wheel were carried out in the paper to make them not only be better applied in all kinds of water conservancy but also be wildly applied in ship project, city environmental protection, and other correlative project, further to better the social and living condition. The main contents in the paper are as follows:(1) The operational principle of the hydraulic automatic tilting gates with connecting lever and rolling wheel were analyzed. Using block diagram, the author elaborated on the running course and steady factors of the tilting gate. Then the instantaneous running center in the running course of the tilting gate was brought forward, and the trochoid of the center was described. And then the basic balance equations in the course of the running of the gate were analyzed and studied.(2) According to the theory, the author studied the static state stability of the hydraulic automatic tilting gate with connecting lever and rolling wheel. On the basis of feedback control, the author analyzed dynamic balance principle of the hydraulic automatic tilting gate, then worked out the stability analysis program of the gate to analyze the stability of the hydraulic automatic tilting gate system. So the hydraulic automatic tilting gate with connecting lever and rolling wheel can ensure the stability of itself.(3) The vibration types and physical course of the tilting gate were elaborated, the causes of all kinds of the vibration were analyzed, and then the corresponding shock absorption measures were put forward. According to the analysis of the gate, the author put forward a mathematical model of the optimization design of the hydraulic automatic tilting gate, and then worked out the structural stability optimization design program of the hydraulic automatic tilting gate. Then by the calculation of the program, a better design for a certain project was gained.(4) The running state and hydraulic property of the hydraulic automatic tilting gate with connecting lever and rolling wheel were analyzed. The open-door curve, start-up water level and shutdown water level were ascertained, then the influence of lower reaches of a river to the running of a tilting gate was analyzed. According to the diverse current state of a tilting gate, the flux calculation program was worked out to calculate the flux at different current state of the gate and to protract the curves of flux to upper reaches of the gate.