Hydraulic Motor characteristics and classification
　　Feature
　　From the point of view of energy conversion, hydraulic pump with Hydraulic Motor is reversible work of hydraulic components, hydraulic pump input to the work of any kind of liquid, can make it into a hydraulic motor condition; the other hand, when the hydraulic motor shaft from the outside torque-driven rotation, they can pump into working condition. Because they have the same basic structural elements - closed but you can cycle with the volume and the corresponding oil sector.
　　However, due to the hydraulic motor and pump have different working conditions, their performance requirements are not the same, so the same type of hydraulic motor and hydraulic pump between, there are still many differences. First Hydraulic Motor should be able to now, reverse, and therefore requires that its internal structure symmetry; hydraulic motor speed range required is large enough, particularly the minimum steady speed it has certain requirements. Therefore, it is usually with rolling bearings or hydrostatic bearings; second hydraulic motor oil due to the input pressure to work under conditions, which do not have the self-absorption capacity, but requires some initial tightness, can provide the necessary starting torque. Because of these differences, making the hydraulic motor and hydraulic pump is quite similar in structure, but not reversible work.
　　Classification
　　Hydraulic Motor sub-types according to their structure can be divided into gear, vane, piston, and other types. By hydraulic motor rated speed is divided into two major categories of high-speed and low speed. The rated speed is higher than 500r/min high-speed hydraulic motor, the rated speed is lower than 500r/min speed hydraulic motor. Basic types of high-speed hydraulic motor with gear, screw, vane and axial piston and so on. Their main feature is a high speed, moment of inertia is small, easy to start and brake, adjustable (speed and commutation) and high sensitivity. Usually not very high-speed hydraulic motor output torque is also known as high-speed low torque hydraulic motor. The basic types of low-speed hydraulic motor radial piston, axial piston in addition, vane and gear also has a low structural type, low speed hydraulic motor displacement of the main characteristics of large, bulky, low speed (sometimes a few turns per minute or even a few tenths of turn), it can be directly connected with the working body; no deceleration devices, greatly simplifying the transmission mechanism, usually a larger output torque low speed hydraulic motor, so called low speed high torque hydraulic motor.