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Introduction to the classification of hydraulic motors


Hydraulic motors can be divided into gear type, vane type, plunger type and other types according to their structural type.

According to the rated speed of hydraulic motors, they are divided into two categories: high speed and low speed. High-speed hydraulic motors have a rated speed higher than 500r/min, and low-speed hydraulic motors have a rated speed lower than 500r/min.

The basic types of high-speed hydraulic motors include gear type, screw type, vane type and axial plunger type. Their main features are high speed, small moment of inertia, easy starting and braking, and high sensitivity of adjustment (speed regulation and reversing). Usually, high-speed hydraulic motors have low output torque, so they are also called high-speed low-torque hydraulic motors.

The basic type of low-speed hydraulic motor is radial piston type. In addition, there are also low-speed structural types in axial piston type, vane type and gear type. The main characteristics of low-speed hydraulic motor are large displacement, large volume and low speed (sometimes up to several revolutions per minute or even a few tenths of a revolution), so it can be directly connected to the working mechanism; no reduction device is required, which greatly simplifies the transmission mechanism. Usually, low-speed hydraulic motors have a large output torque, so they are also called low-speed and high-torque hydraulic motors.

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