装载机发动机输出功率分配特性的试验研究

Experimental Study on Distribution Characteristics of Loader Engine Output Power

装载机发动机功率分配特性研究有利于发动机多功率工作模式的设计与应用。以某典型装载机为例,在计算其传动轴转矩、转速基础上,结合液压系统工作压力,选择并标定了转矩与液压传感器,将转矩、转速与液压传感器信号接入数据采集仪,构建了装载机参数测试系统,应用n Soft软件、采用"铲-续-铲"方式对实车测试数据进行处理,获得了典型工况下装载机传动系统与液压系统实时动态消耗发动机功率历程谱图,针对谱图中反映出的同一工作循环不同作业段消耗发动机功率相差较大情况,提出将发动机功率设计为高、中、低三种功率工作模式,在满足实际作业需要的同时达到节能降耗的目的。

Research on power distribution characteristics of loader engine could be beneficial to design and apply engine multi-power operation mode. A kind of typical loader was taken as an example in this paper,on the basis of the calculation of its drive shafts＇ torques and rotational speeds,and the combination of the hydraulic system pressure,the sensors of torque and hydraulic pressure were selected and calibrated,when the sensor signals of torque,rotational speed and hydraulic pressure were connected into data acquisition instrument,a loader parameter test system was built,after using n Soft software and ＂shovel-continued-shovel＂way to process the actual vehicle test data,a real-time dynamic engine power spectra consumed by loader transmission system and hydraulic system under the typical working conditions were obtained,aiming at a large difference of consuming engine power in different operation periods under the same work cycle reflected from the spectrum diagram,in order to meet the need of actual operation and achieve the purpose of saving energy and reducing consumption. the method for designing engine power in three power operation mode with high,medium and low was proposed in the paper.