A LOADING MACHINE EQUIPPED WITH A FIRST AND A SECOND PUMP SUPPLYING PRESSURE OIL TO AT LEAST ONE HYDRAULICALLY DRIVEN WORKING COMPONENT, SUCH AS A HYDRAULIC PISTON-CYLINDER DEVICE OR HYDRAULIC MOTOR

摘要

the invention relates to a loading machine equipped with a first and a second pump for supplying hydraulic oil to a hydraulic component in working order, such as a hydraulic piston cylinder device in which pressure and flow variable oil pump which can be connected to the a mutual action.when it is necessary. the second pump is a fixed displacement pump.the first pump is a pump regulator under the influence of the pressure of the hydraulic loading system, which is intended to act on the first pump so as to maintain the output of the pump and the load pressure on the ru00e9gulateu r pump a pressure difference determined by the pump regulator.the first pump is connected to the component to work through a variable choke. we have a control system that is designed to connect the second pump is more important in the system, only when a steady increase in the flux is needed, which cannot be achieved solely by the first pump.