Hydraulics and Pneumatics: Unit II: Hydraulic Actuators and Control Components

rotary actuators (or hydraulic motors)

Hydraulic Actuators and Control Components - Hydraulics and Pneumatics

The function of a rotary actuator is to convert hydraulic energy into rotary mechanical energy.

ROTARY ACTUATORS

ROTARY ACTUATORS (OR HYDRAULIC MOTORS)

1. What are Rotary Actuators?

The function of a rotary actuator is to convert hydraulic energy into rotary mechanical energy.

Rotary actuators are the hydraulic equivalents of electric motors. Hence_rotary actuators are also called as hydraulic motors.

The hydraulic motors are very much identical in construction and size to rotary type pumps. They work on exactly the reverse principle to that of rotary pumps.

Instead of pushing the fluid as pumps do, in a hydraulic motor the rotating elements (ie., vanes, gears, pistons, etc.) are pushed by the pressurized fluid. This enables the hydraulic motor to develop the necessary output torque and rotating motion.

The hydraulic motors are usually rated/specified in terms of the torque developing capacity or differential pressure.

2. Classification of Hydraulic Motors

The hydraulic motors can be classified based on their degree of angular movement as :

1. Continuous rotary hydraulic motors, and

 (i) Gear motors, (ii) Vane motors, and (iii) Piston motors.

2. Limited-rotation hydraulic motors*

(i) Vane type, and (ii) Piston type.

Now we shall discuss the construction and operation of gear, vane, and piston motors, in the following sections.

Hydraulics and Pneumatics: Unit II: Hydraulic Actuators and Control Components : Tag: : Hydraulic Actuators and Control Components - Hydraulics and Pneumatics - rotary actuators (or hydraulic motors)


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Hydraulics and Pneumatics

ME3492 4th semester Mechanical Dept | 2021 Regulation | 4th Semester Mechanical Dept 2021 Regulation