Study On The Wetmultiple Diskpressure Lossbrake And Braking System Of Rubber-tired Vehicle Used In Mine

Trackless rubber-tired vehicle used in mine is a kind of auxiliary transportationvehicle which used in mine dangerous environment. It is more and more widelyappliedinthe modern coal mineauxiliarytransportation because ofitsefficientperformance.As an importantcomponentin of vehicle, the brakingsystemdirectly related to trafficsafety. Currently,the ordinary wet multiple disk brake andbraking systemisapplied more and more widely, but the wet multiple disk pressureloss brake and braking system hasonly been applied in the large tonnage rubber-tiredvehicle, while in the middle and small tonnage rubber-tired vehicle isapplied rarely.Though there are advantages of security, simple and convenienceofpressure loss brake and braking system, there are few related research about it.Soithas significantmeaning tostudy on wet multiple disk pressure loss brake and brakingsystemof middle and small tonnagt trackless rubber-tired vehicle used in mine.A wet multiple disk pressure loss brakeis designed in this study,structureparameters and keyparts are designed and calculated based on therequirementsof braking performance oftheappliedvehicle, and braking performanceischecked.The finite elementanalysis software ANSYSWorkbench is used to checkpistonand the right end cap ofthe brakewhich bear largepressure, and the results showthatthe strength and stiffnesscan meet the designrequirements.The brake bearsgreat mechanical loadandthermal loadin the braking process. Thefinite element analysissoftware ABAQUS is used tosimulate the temperature field inbraking process,the distributionand regulation ofthe temperature fieldare analyzedaccording to simulation results.The hydraulic control system of wet multi discbrake is designed and the workingprinciple is analezed in this study.Key components parameters such as reverseadjusting brake valve, one-way prefill valve and accumulator are calculated, thus thebraking times canmeetthe requirements of relevant standards. The simulation modelof reverse adjusting brake valve,one-way prefill valve and the full hydraulic pressureloss brake system are established by using hydrauliclibrary, mechanical library,hydraulic component library and signal library in software AMESim. Then, the prefillperformance and braking performance are analyzed according to actual condition.Finally, a full hydraulic pressure loss braketest system is established, the prefillperformance of prefill valve and responseperformance of braking systemare tested.The experimental results, theoreticalcalculation andsimulation results arebasically the same, the accuracy ofthe theoretical analysis and the simulationmodelare verified. The rise of braketemperature， properties of flat roadbrakingdistanceandramp braking are tesed. The results show that the performance ofdesignedbraking system is in accordance with the relevant requirements.