大型矿用自卸车举升液压系统设计与仿真

针对大型矿用自卸车举升液压系统高压、大流量的特点,借鉴国外同类车型举升液压系统原理,设计了由6个盖板式插装阀和2个螺纹插装阀组成的新型举升液压系统原理图,实现举升、停止、下降和浮动4个动作。以某大型矿用自卸车为例,利用Automation Studio仿真软件,对举升液压系统进行建模和仿真,得到该车在货厢举升过程中,举升油缸位移、无杆腔和有杆腔油液压力随时间的变化曲线。由仿真结果可知:各级油缸伸出时、由举升转换至停止和停止转换至下降时均存在压力冲击,最大冲击峰值为29.0 MPa。

Design and Simulation of Hydraulic Lifting System for Large Mining Dump Truck

According to the feature of high loading and high flow for the hydraulic lifting system of the large mining dump truck, referring to the lifting hydraulic system principle of overseas similar vehicle, the new lifting hydraulic system schematic diagram with 6 plate type cartridge valves and 2 threaded cartridge valve was designed, by which four movements of lifting, stopping, dropping, floating were realized. Taking some model of mining dump truck as example, the modeling and simulation process were finished using Automation Studio software, the lifting cylinder''s displacement, piston chamber pressure and rod chamber pressure curves during the lifting process were obtained over time scale. Then, the pressure impacts when all levels of cylinders stretching out, the lifting transforming to the stopping and the stopping transforming to the dropping were known by the simulation results, and the biggest impact peak valve was 29.0 MPa.