装载机流量匹配转向系统特性分析

Analysis on Steering Characteristics of Wheel Loader Based on Flow Matching Principle

国产小型装载机普遍采用负荷传感转向方式,该系统定量泵输出流量不能根据负载需求进行调节,会产生与流量有关的能量损失。针对此问题,提出用伺服电机独立驱动定量泵的流量匹配转向控制方法。在Simulation X中建立了装载机整机联合仿真模型,对采用负荷传感转向系统的装载机进行了仿真研究;构建了装载机的试验测试系统,对比仿真与试验结果,验证了仿真模型的准确性。进一步将流量匹配转向系统应运于此仿真模型,维持与现有系统相同转向特性的条件下,该系统在各转向工况下降低泵输出能耗约35%。

Small wheel loader generally uses load sensing steering system. Although the pressure of the system can match the load, the flow of the fixed displacement pump can＇ t match the varied load that leads to energy loss. For this issue, a new steering control method of flow matching which adopts a servo motor to drive a fixed displacement pump independently is proposed. The loader co-simulation model built by software SimulationX is used to simulate the characteristics of the steering system. Meanwhile, testing system platform is built to prove the accuracy of simu- lation model. At last, the simulation model is used on the flow matching steering system. The simulation results show that the energy consumption can be reduced about 35%.