Hydraulic system for excavators with electrical interconnection valve that when activating crawler motors and industrial hydraulics connects together the pump outlet and the control circuit

摘要

Device on excavators that has at least two, through load pressure sensing valves (14-17) adjustable hydraulic pumps (10, 11). The pumps (10, 11) are set up to operate, at least, their own hydraulic (18, 19) for carrying out a working motion, e.g. swinging a boom or respectively a shaft and one crawler motor (20, 21). In order to avoid the crawler motors (20, 21) working at different speeds when both are activated for running the excavator directly forward or backward and one or more working hydraulics (18, 19) are activated at the same time, a valve (32) is set up which is designed to connect together the pumps (10, 11) outlets (12, 13) and control circuits (22, 23, 26, 28, 30; 24, 25, 29, 31).IMAGE