Frequent braking of mining wide body vehicles in extreme road conditions will lead to variable vehicle load,resulting in engine shutdown or sharp change of braking system pressure,leading to the failure of braking system.In response to the above problems,a double pump energy supply hydraulic braking system with an energy emergency module was proposed.The emergency accumulator was used as the energy emergency module,the engine and motor driven oil pump formed a double pump energy supply module to supply en-ergy for the system,with emergency braking,driving brake and other braking methods.The energy emergency and double pump supply hydraulic braking system and the traditional single pump supply system were compared and analyzed,and the system simulation model was established in AMESim.The results show that:compared with traditional single pump energy supply system,the first filling time of the double pump energy supply system is reduced by 0.98 s,and the energy emergency module and the double pump energy supply module can continuously ensure the hydraulic oil supply of the system;the response time of the middle and rear axle braking is about 0.03 s slower than that of the front axle braking,and the vehicle braking stability is better;the system can realize the emergency braking in the driving of the mining wide body vehicle.
关键词
液压制动系统/能量应急/双泵供能/制动稳定性
Key words
hydraulic braking system/energy emergency/double pump energy supply/braking stability
维普
万方数据