Features of High Speed Low Torque Hydraulic Motors


The main features of high-speed hydraulic motors are: high speed, small moment of inertia, easy to start and brake, high sensitivity of speed regulation and commutation. Usually, the output torque of the high-speed hydraulic motor is small, only tens to hundreds of N×m, so it is also called the high-speed small torque hydraulic motor. High-speed hydraulic motors include gear type, vane type, axial piston type, etc.


The hydraulic motor makes the hydraulic system output speed and torque, and drives the working parts to rotate. In terms of working principle, the hydraulic pump and hydraulic motor in the hydraulic system work by the change of the closed volume. In principle, they are reversible, but they are different in structure and cannot be used universally.

Selecting a High Speed Low Torque Hydraulic Motor probably needs to consider the following issues:

1. Hydraulic motor speed range

2. Starting torque and continuous working torque of hydraulic motor

3. The working force of the hydraulic motor (for example, driving a fan is not an ordinary hydraulic motor, and the thrust or pulling force received by the motor should be considered)

4. Special attention should be paid to the hydraulic motor oil circuit, if there is a series series

5. Installation space and design cost

High-speed motors generally use plunger motors. Of course, gear motors are also used in many places. Vane motors are also high-speed motors, but they are not common.

Second, the difference between high-speed and low-speed hydraulic motors

High-speed motors have 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.

The low-speed hydraulic motor has the advantages of simple structure, reliable operation, many varieties and specifications, and low price. The disadvantage is that the volume and weight are large, and the torque pulsation is large.

The rotational speed of the hydraulic motor has a great relationship with the torque. Although you can adjust the speed through the flow, the torque of the motor is a parameter configured according to the design requirements. When selecting hydraulic motors, pay attention to: 1. Speed; 2. Rated flow; 3. Torque; 4. Rated pressure; 5. Installation method.


HANJIU TECHNOLOGY is a manufacturer specializing in the production of hydraulic motors for many years. It has many years of R&D and production experience in both high-speed motors and low-speed motors. If you are inquiring or looking for hydraulic motor-related manufacturers and trading partners, you can immediately log in to www.hjhydraulic. com, contact customer service for more product models and information.If you have any questions about Hydraulic Motors, you can leave a message on the website or send an email, and you will get a professional reply as soon as possible

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