The motor pump is mechanical energy into hydraulic energy converting means, output flow and pressure, desired high volumetric efficiency; hydraulic motor to fluid pressure energy is converted to mechanical energy means, the output torque and speed hydraulic motors, desired mechanical efficient. Thus said pump energy unit, and a hydraulic motor is the actuator. 2) hydraulic steering motor output shaft must be able to forward and reverse, repair of the hydraulic motor, so the structure was symmetrical; and some hydraulic pump (such as gear pumps, vane pumps, etc.) are clearly defined steering, hydraulic LeCroy motors, only one-way rotation, can not change the direction of rotation. Machinery loss of mechanical loss refers to the loss of hydraulic torque. It is equal to pump large theoretical torque Tt and the actual input torque T ratio, set the torque loss of Tl, the mechanical efficiency of the hydraulic pump (2) hydraulic pump power 1) input power input power means acting hydraulic mechanical power on the pump shaft, hydraulic motor installation, when the input torque Ti, when the angular velocity is ω = Tiω2) output power P output power means the actual pump suction during operation, the differential pressure Δp between ports and q product output flow, namely P = Δpq (3) the overall efficiency of the hydraulic pump hydraulic pump overall efficiency is the actual output power to its input power ratio LeCroy hydraulic motors, hydraulic preferred crystal Chong (certification), the hydraulic motor from Jinan Jing Chong Hydraulic Machinery Limited. Jinan Jing Chong Hydraulic Machinery Co., Ltd. (www.jnjcyy.com) (www.jnjcyy.com) Shandong Jinan, mining machinery leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum meet customer needs. In the crystal creating hydraulic leadership with the staff warmly welcome all inquiries negotiations to create the crystal creating hydraulic better future.