| An Supporting--crushing Rock-roadheader (Hereinafter referred to as Roadheader) is designed to solve the problems of hard rock cutting and low working efficiency of underground roadway, It was a new integrated unit, could transporting, loading, drilling and walking. This paper takes the working mechanism's hydraulic system as research object, applying modeling theory and computer simulation technology to explore its properties and to improved it.The study first establishes the simulation model of working mechanism's hydraulic system under the environment of AMESim. The dynamic analysis for the output characteristics of the variable pump, the control system of LUDV and the control system of working mechanism, and simulation research the influence of the LS valve parameters on the system. Establishes the virtual prototype model of working mechanism combining with the Pro/E and ADAMS. According to the theory of wave mechanics mechanical impact, export the impact load of digging machine. The joint simulation is done for the dynamic characteristics of working mechanism's hydraulic control system by using AMESim and ADAMS. And the simulation comparison for the power consumption of the manner of composite work and work alone was done. According to the results of simulation put forward the improvement scheme of the working mechanism's hydraulic system:shunt damping. And for choosing the damping mouth doing a simulation study. The results show that:LS valve core diameter is 6 mm, spring stiffness is 25 N/m,the energy saving effect of system is the best; If the working hours are allowed, try to use separate works; and If the working hours are not allowed, compound works should be used, to save energy better. The damping orifice of Shunt damping system is 0.8mm, this will help improve the system stability and energy saving. |
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