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1 前言对挖掘机来说,既要求有大的力,能进行强有力地掘削;又要求有快的速度,能迅速地装运和卸土,以保证高的作业效率。由于长时间大功率液压驱动,节能提高液压系统的效率也很重要。另外,要求铲斗能按一定的轨迹进行切削,有高的掘削精度,以提高作业质量,从而减少辅助工作时间。还要求操纵简单轻便,减轻司机劳动,工作安全以及降低噪音等等。
1 Introduction For excavators, both large forces and strong excavation are required; fast speeds are required, and shipments and unloading of soil can be quickly performed to ensure high working efficiency. Due to the high power hydraulic drive for a long time, it is also important to increase the efficiency of the hydraulic system by saving energy. In addition, it is required that the bucket can be cut in a certain trajectory, and the excavation accuracy is high to improve the work quality, thereby reducing the auxiliary working time. It also requires simple and light manipulations to reduce driver’s labor, work safety and reduce noise.