Hydraulic Rotary Actuator: Classification and Working Principle Revealed
Release time:
2025-11-13 14:05
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Hydraulic Rotary Actuator: Classification and Working Principle Revealed
Hydraulic rotary actuator —— as a key component in the field of mechanical transmission, has been increasingly widely used in construction machinery, automated production lines and other scenarios due to its compact structure and high torque output advantages. Many industry practitioners are concerned about its classification standards and core working principles, and we will provide the following popular science:
In terms of structural form, hydraulic rotary actuators are mainly divided into two types: vane type and spiral type.
The vane type hydraulic rotary actuator achieves angular swing through the rotation of vanes in the cylinder block. It has a compact structure and rapid response, and is suitable for medium and small torque, small angle swing scenarios;
The spiral type hydraulic rotary actuator converts the linear motion of the piston into the rotary motion of the output shaft by means of a screw pair mechanism. It features high torque density and strong rigidity, adapts to heavy-load, high-precision and large-angle swing requirements, and exhibits outstanding stability under harsh working conditions.
Our core product is the spiral type hydraulic rotary actuator. During the working process of the spiral type hydraulic rotary actuator, when hydraulic oil enters the cylinder block through the oil port and acts on the piston, the piston will perform linear motion. Since the piston and the output shaft are connected through a screw pair, the linear motion of the piston is converted into the swing motion of the output shaft. This structural form enables the spiral type hydraulic rotary actuator to achieve large torque output in a small space, and at the same time has the advantages of compact structure, safety and reliability, and easy control, meeting the operational needs of different working conditions.
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