High Pressure And High Water-based Mining Emulsion Pump Station Unloading Valve

In china coal mining, underground mining play a main role. Emulsion pump as a power component in mining hydraulic system. It offers emulsion medium for system to work .Modern mining industry needs the medium pump station provide higher and higher quality. In other words, it asks the hydraulic support should bear for smaller and smaller pressure wave. But as the operation face to heavy load and high speed which needs more and more , it makes pump station power bigger and bigger. And energy conservation factor decides relief valve could not stabilize the power that coming from pump station. So, unloading valve becomes especially important, because it dynamics characteristics .Thesis is based on machine liquid simulation software AMESim which study for the modeling and emulation and rely on the parameter identification experiment to study the dynamic characteristics of unloading valves. The result of the study for unloading valves production of a new prototype has very important guidance role.Firstly, this thesis introduces the definition of hydraulic transmission .Then, it shows a research status recently about unloading valve at home and abroad. Because of the aqueous medium specific characteristic ,thesis discuss the problem that aqueous status brings about and the key technology of designing processing manufacturing process, taking advantage of hydraulic pressure and AMESim to modeling unloading valve, build unloading valve mathematical model and AMESim simulation model. According to the model ,I make analysis of electromagnetic control way and machinery control way .Then I have the dynamic progress conclusion to discharge valve for the frequency domain analysis, to calculates the inherent frequency of unloading valve by using AMESim software's modal analysis .It makes frequency of operation far away from modal frequency. In order to avoiding covibration, I put Genetic Algorithm optimization theory in use, choose the bigger parameter which influences unloading valve to Parameter selection. Then optimization design this parameters, so as to make unloading valve could achieve a best Energy-saving effect when it works. For checking the simulation result listed above, with the help of the coal scientist graduated school of taiyuan, I put up Experimental System and started experiment. The experiment result shows that unloading valve has good steadiness and pressure wave ranges small. It not only contents emulsion pump station need,but also tests and verifies imitate emulation exact.This thesis is mainly studied for the special emulsion pump pressure control ,useing unloading valves to mathematical analysis and simulation study for pump station.Then it supports a theory for unloading valve trends function. This thesis about unloading valve structure parameters has a great reference value.