Types of Pneumatic Motors

In this article, we’ll cover the types of pneumatic motors. What are the types of pneumatic motors. What are their properties and how do they differ from each other. We’ll examine where they’re used.

Types of pneumatic motors are classified as follows:

Piston-type pneumatic motors (radial and axial)
Vane-type pneumatic motors
Gear-type pneumatic motors
Turbine-type pneumatic motors (radial, axial, and peripheral)

Piston-Type Pneumatic Motors

Piston-type pneumatic motors
Are made in two types: radial and axial.

Two different types of piston-type pneumatic motors.

Radial Piston Pneumatic Motors

Compressed air entering the pistons arranged around a crankshaft creates a rotating motion in the crankshaft. Radial piston motors are capable of operating at 500-1500 rpm.

Internal and external structure of the radial piston motor, one of the types of pneumatic motors

Axial Piston Pneumatic Motors

The pistons are arranged parallel to the motor shaft. As the pistons move under the effect of compressed air, they rotate the motor shaft. Plates mounted at an angle on the motor shaft rotate, imparting axial motion to the pistons, which in turn rotates the motor shaft. They have a rotation speed of 1500-3000 rpm. The power of radial and axial piston motors ranges between 2-20 kW. The number of pistons is 5 or more.

Axial piston motor — Internal structure and external appearance of an axial piston motor

Vane-Type Pneumatic Motors

These consist of vane-shaped blades arranged around a rotor mounted eccentrically inside a cylindrical housing. Compressed air entering the motor strikes the blades and rotates the rotor. The vane slots operate by opening and closing like a slide within their own structure. They’re capable of rotating at 5,000-10,000 rpm and generating up to 18 kW of power.

vane type among the types of pneumatic motors — Internal and external view of a vane-type pneumatic motor

Piston Motor Torque

Piston-type pneumatic motors are known for their ability to produce high torque at low speeds.

Prevalence of Vane-Type Motors

Vane-type pneumatic motors are the most widely used type in industry, thanks to their simple structure and low cost.

Turbine-Type High Speed

Turbine-type pneumatic motors are preferred for tasks such as precision grinding, since they can reach very high rotation speeds.

Gear-Type Pneumatic Motors

Just as with hydraulic gear motors and pumps, these consist of two cylindrical spur gears mounted on bearings within a housing. Compressed air passes between the teeth of the gears, rotating the motor shaft.

Turbine-Type Pneumatic Motors

These operate on the same principle as turbine-type compressors. They generate small forces at high speed. Under sudden loading, the system stops and then restarts. This stopping motion doesn’t damage the motor. They operate at 500,000 rpm. Compressor motors used in air drills and dentistry are of this type. They’re made in three types: radial, axial, and peripheral

Turbine type among the types of pneumatic motors — Internal structure and external appearance of the turbine type, one of the types of pneumatic motors

As Mechanical Engineering Education, we’ve covered the topic of pneumatic motor types in this article. We provided detailed information about the types of pneumatic motors. Until we meet again in a new article.

Related Questions

In axial motors, the pistons are arranged parallel to the motor shaft, and the swash plate mechanism transmits motion more efficiently. This design makes it possible to reach much higher speeds (1500-3000 rpm) compared to radial motors (500-1500 rpm).

Every application has different needs; some jobs require high torque, others high speed. Different designs, such as piston, vane, gear, and turbine types, have been developed to offer the best performance and efficiency for these different needs.