多功能清雪车单泵多马达液压系统功率分配分析

Power allocation analysis of hydraulic system with single pump and multiple motors of multifunctional snow-plough

为研究多功能清雪车单泵多马达液压系统在使用流量分配器和液压变压器条件下的功率分配特性,在理论分析并建立齿轮流量分配器分流排量方程和液压变压器压力控制方程的基础上,运用液压数值分析软件AMESIM对多功能清雪车液压系统的功率分配进行了数值分析,数值分析曲线直观地显示了各马达的流量、压力、转速和转矩特征。对比数值分析结果与实测参数值,二者最大相对误差绝对值小于15.5%,且得到了多功能清雪车单泵多马达液压系统功率分配的特征值;流量分配器和液压变压器能够实现单泵多马达液压系统功率分配和有效避免功率干涉;分配功率存在负向偏移性,最大负向偏差比为-12.5%。流量分配器和液压变压器可有效地解决液压系统的功率分配和负载功率干涉问题。

In order to investigate the power allocation characteristics of the multifunctional snow-plough＇s hydraulic system that with the single hydraulic pump and the multiple hydraulic motors,it was simulated with AMESIM that is the professional numerical analysis software for the hydraulic system.And the numerical analysis is based on the theoretical analysis and the established shunt displacement equations of the gear flow divider and the established pressure control equations of the hydraulic transformer.The flow characteristics and the pressure characteristics and the rotating speed characteristics and the rotating torque characteristics of all hydraulic motors are directly showed by the numerical analysis curves.Comparing the numerical analysis curves with the experiment data,the absolute value of the maximum relative error is less than 15.5%,and the power allocation eigenvalue of the multifunctional snow-plough＇s hydraulic system that with the single hydraulic pump and the multiple hydraulic motors.The power allocation can be realized and the power interference can be effectively avoided by using the low divider and the hydraulic transformer in the hydraulic system that with the single hydraulic pump and the multiple hydraulic motors.The distributive power has the migration character to the negative direction,the maximum negative error is-12.5%.The problems of the power allocation and the load power interference are effectively solved by using the low divider and the hydraulic transformer in the hydraulic system.