目前,履带式起重机的控制主要有液压控制和电子控制两种方式,通过液压或电子控制,实现履带式起重机的提升、变幅、回转以及行走等动作。以下就这两种控制方式作以分析比较。控制原理液压控制液压控制原理见图1。以提升为例,操作时将先导阀推到提升位置,先导泵来油经先导阀作用于方向控制阀使其换向,主泵来油通过控制阀驱动液压马达旋转,马 At present, the main control of crawler cranes are hydraulic control and electronic control in two ways, through hydraulic or electronic control, to achieve crawler crane lifting, luffing, slewing and walking and other movements. The following two control methods for analysis and comparison. Control principle Hydraulic control Hydraulic control principle shown in Figure 1. To enhance, for example, the operation of the pilot valve pushed to the lifting position, the pilot pump to the pilot valve to the directional control valve to change its direction, the main pump to the oil through the control valve to drive the hydraulic motor rotation, the horse