CONTROLLER FOR SERVICE MACHINE FOR POWER SHOVEL

摘要

PURPOSE:To improve the efficiency of excavation, by arranging the pump pressure detecting means of a service machine, a control means finding the discharge distribution ratio of pressure oil, and a control means distributing pump discharge with the found distribution ratio and directing the output of discharge command to each service machine. CONSTITUTION:The respective rotational angle gamma, beta, alpha of a bucket, am arm, and a boom on every excavating section required for a bucket posture set at every excavating point are found, and the discharge distribution ratio of pressure oil fed to each service machine is found. After that, a relation between pump pressure obtaining a specified horsepower and pump discharge is set, and the pump discharge determined by the set relation and detected pump pressure is distributed with the found distribution ratio, and the output of discharge command is directed to each service machine. Then, to the service machine (normally, an arm) of the greatest load, the output of a value larger than the discharge command computed from a relation between the distribution ratio and the pump pressure, and the pump discharge is directed, and to other service machines (a bucket, a boom), the output of command according to a discharge command value is generated. As a result, a relief loss and the loss of pump output can be reduced.