| The hydraulic support was mainly used to support and maintain roof in theprocess of coal underground mining, and which hold up certain safety work space forcoal workers and equipment in order to keep the coal mining smoothly. The safetyvalve is a critical component in the hydraulic support with the function of control andoverload protection. Once the safety valve structure was failed, the leg cylinder wouldlead to belly or burst, piston rod bent or broken, equipment damaged, and evenendanger human life safety. So research on hydraulic support with high pressure andlarge flow valve has important theoretical consequences and a wide range of practicalvalue.According to the design standards and performance requirements, the paper hasinitially completed the structure design of high pressure and large flux differentialsafety valve; using the computational fluid dynamics software Fluent to simulate thesafety valve flow field in fully opening state, though the simulation, it is known thatthe fluid in the outlet was in turn, for this phenomenon, we should have optimized thestructure of the safety valve and simulated the optimized structure flow field underdifferent opening;3D fluid-solid coupling numerical simulation of the safety valve bythe software ADINA, and through the interaction of structure field and flow field, wecan study on the distributing characteristic of physical quantity such as pressure,velocity,flow rate and so on in the flow field and the structure pressure change whenthe safety valve port is from close to open completely; Simulation of dynamiccharacteristics of the safety valve by the software AMESim, and then comparing thesimulation results with the ADINA.At last, measuring the opening, closing and overflow characteristics of the safetyvalve by the high pressure and large flow valve test system, and the test results further have demonstrated the validity of the theoretical analysis and the feasibility of thestructure. |
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