The hydraulic motor is an actuator of the hydraulic system, which converts the hydraulic pressure energy provided by the hydraulic pump into the mechanical energy (torque and rotational speed) of its output shaft. Liquid is the medium that transmits force and motion.

      Hydraulic motors, also known as oil motors, are mainly used in injection molding machinery, ships, hoists, construction machinery, construction machinery, coal mining machinery, mining machinery, metallurgical machinery, marine machinery, petrochemical, port machinery, etc.

      The high-speed motor gear motor has the advantages of small size, light weight, simple structure, good manufacturability, insensitivity to oil pollution, impact resistance and low inertia. The disadvantages are large torque pulsation, low efficiency, small starting torque (only 60%-70% of the rated torque) and poor low-speed stability.

      From the point of view of energy conversion, the hydraulic pump and the hydraulic motor are reversible hydraulic components. Inputting working fluid to any hydraulic pump can make it work as a hydraulic motor; When the torque is driven to rotate, it can also become a hydraulic pump working condition. Because they have the same basic structural elements - a closed and cyclically variable volume and a corresponding oil distribution mechanism. However, due to the different working conditions of hydraulic motors and hydraulic pumps, their performance requirements are also different, so there are still many differences between hydraulic motors and hydraulic pumps of the same type. First of all, the hydraulic motor should be able to forward and reverse, so its internal structure is required to be symmetrical; the speed range of the hydraulic motor needs to be large enough, and there are certain requirements for its stable speed. Therefore, it usually adopts rolling bearings or hydrostatic sliding bearings; secondly, the hydraulic motor does not need to have self-priming ability because it works under the condition of input pressure oil, but it needs a certain initial sealing to provide the necessary starting torque. Due to these differences, the hydraulic motor and the hydraulic pump are similar in structure, but cannot work reversibly.