Abstract:In order to make the fixeddisplacement pump output multiflows and work in different pressures without reducing valve and make the fixeddisplacement motor output multispeeds and torques, a novel doublestator pump and multiple output gear motor was designed, and the driving system of doublestator pump and multiple output gear motors was proposed. After determined the functional symbol of elements, by taking separately doubleacting doublestator pump and 13 type multiple output gear motors for example, the output characteristics of multipump and multimotor in different working conditions were analyzed, and different connections of BA multiple output gear motors, the common expressions of the output flow, output rotational speed and torque of doublestator pump and multimotor were calculated. At the same time, influence of discharge coefficient on output characteristics was discussed. The results show that multilevel fixed speed and torque can be gotten through changing the connections of multipump multimotor system, the range of export is expended, which has laid the foundation for the applications of the novel hydraulic system.