Research on Working Characteristics of a Digital Pump with Direct Energy Recovery
Aiming at the problems of complex system structure,multiple energy conversion links and high cost when digital hydraulic pump/motor is used for gravitational potential energy recovery in mobile machinery,a new type of digital pump with direct energy recovery is proposed.Adding a special recovery valve and port redirects recovered high pressure oil to plunger chamber during inlet oil suction stroke,driving digital pump and prime mover,recycling external hydraulic energy directly.The composition and three working modes of the direct energy recovery digital pump are analyzed,and the AMESim simulation model of its performance test system is established.The characteristic curves such as pump shaft angle,pump output flow,oil recovery flow,plunger chamber working pressure and pump shaft torque are simulated under mixed mode operation.An experimental platform has been set up to test the working characteristics of the direct energy recovery digital pump,and the experimental verification of energy recovery under mixed mode of digital pump is carried out.The results show that the input torque consumed by the pump decreases significantly after energy recovery,which verified the feasibility and correctness of the proposed digital pump.
direct energy recoverydigital pumpdigital hydraulichydraulic energy-savingmoving machinery
万方数据
维普
