液压挖掘机回转马达机械式制动器的研究

t first, in this paper, it introduces a kind of brake circuits of hydraulic slewing motor of the mini excavator, and it introduces the composition and working principle of mechanical brake. Aiming to the brake circuits of hydraulic slewing motor of the mini excavator, analyzing the delay brake of mechanical brake is necessary, and it describes using flow valve can achieves the target. Dynamic characteristics of the brake jar of the mechanical brake were simulated using AMESim, which is one of the advanced simulation software in the world. The simulation validates mechanical brake delaying brake by using flow valve. And it also gives a different set of values of the orifice, and by analyzing the simulation results it gains a useful conclusion, it has an important reference value for the parameters’ selection in design.