Chapter 4 Hydraulic Actuators 4.1 Hydraulic Motors 4.1.1 Introduction The popular concept of a hydraulic motor is that it is nothing but a pump run backwards. 1.Characteristic parameters (1)Power and overall efficiencies The input power P of motor is: PMi =ApqM (4-1) The output powerP of the motor is: Ro=Tw×2n (4-2) The overall efficiency nof the motor is the ratio of PMo to P, 1M= (4-3) M 2=1门MmlN Homepage List Upwards Downward止 Return Exit Chapter 4 Hydraulic Actuators 4 4.1 Hydraulic Motors 4.1.1 Introduction The popular concept of a hydraulic motor is that it is nothing but a pump run backwards. 1. Characteristic parameters （1）Power and overall efficiencies The input power of motor is: (4-1) The output power of the motor is: (4-2) The overall efficiency of the motor is the ratio of to , (4-3) P pq Mi M =  M0 M 2π P T n = t M0 M Mm MV Mi P P    = = PMi PM0  M PM0 PMi