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What is a Pneumatic Cylinder? – Principles, Types, Applications

Views: 4     Author: Sudha M     Publish Time: 2024-04-24      Origin: Sudha M

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Pneumatic Cylinder

A pneumatic cylinder is a special type device that uses the energy created by compressed gas to create a force for alternating linear motion. Since that “pneuma” is the Greek word for air, a pneumatic cylinder may also be called an air cylinder.

A force is applied into the piston, pushing it in the desired direction, very much like hydraulic cylinders. A disc or a cylinder serves as the pneumatic cylinder’s piston. The piston rod transfers the developed force to the object that has to be moved. Due to its cleanliness, silence, and need for little fluid storage space, a small percentage of engineers like this system.

Characteristics of Pneumatic cylinder

Pneumatic cylinder general characteristics include:

  • Stroke length of 1 mm to 2 m

  • Available force of 2 KN to 30 KN

  • Piston speed of 0.02 mm to 2 m/s.

Cylinder Construction

There are several minor parts as well, including seals, bearings, guiding bands, permanent magnets, and pistons and piston rods. The main parts are the cylinder barrel, bearing cap, end cap, piston, and piston rod.


All of these components are part of the aforementioned five components that constitute a conventional cylinder.

Cylinder Barrels 

They were originally “simply” tubes. Nonetheless, the majority of cylinders today use extruded profiles rather than tubes. The benefit is that a profile can be utilized for extra purposes.

  • Installing the sensors.

  • The ability to mount attachment pieces

  • Pressurizing double-acting cylinders just one way

Piston Rods

  • The component that conveys the force and movement of the cylinder to the outside is the piston rod.

  • For the purpose of connecting to other customer components, the piston rod tip typically features a thread.

Pistons

  • The actual movement in the cylinder is accomplished by the piston, which is attached to the piston rod.

  • The piston must perform more than just a movement, though. Between the front and back cylinder chambers, it creates a seal.

  • The piston also needs to transform the kinetic remaining energy in the final position. Moreover, the bearing and end caps are important.

Bearing Caps

  • The bearing cap serves as both a bearing and a sealing point for the piston rod while also closing the cylinder (cylinder barrel) on one side.

  • Usually, the bearing cap houses one of the air connectors.

End caps 

  • The end cap secures the other side of the cylinder (Cylinder Barrel).

  • The end cap is often where the second air connection is found.

Different Forms of Pneumatic Cylinder

  • The cylinders’ size, shape, and composition vary according to the use for which they are intended. Pneumatic cylinders can be made from a variety of materials, including stainless steel, steel, nickel-plated brass, and aluminum.

  • The selection of materials for the devices involves considering a variety of factors, including the quantity of loads, a particular stroke length, temperature, and humidity. The devices are also available in a variety of body designs.

Different forms of body constructions offered depending on the job specification

  • Flanged-type cylinders cylinder have fixed flanges on the ends. The most prevalent type of cylinder structure is a tie rod cylinder, which is used to support a wide range of weights. They have also been shown to be the safest form to use.

    • One-piece welded cylinders, which are crimped or welded to the tube at the ends.

    • Threaded end cylinders have a tendency to have the ends attached to the tube body.

General Types of Pneumatic cylinder

The basic types of pneumatic cylinders are

  • Single-acting cylinders

  • Double-acting cylinders

  • Telescoping cylinders

Single-acting cylinders

  • Single-acting cylinders (SAC) operate under pressure created by compressed air.

  • SAC cylinders typically have relatively little extension because of how much room the compressed spring occupies.

Double-acting cylinders

  • Air pressure is used by double-acting cylinders (DAC) to retract strokes and change range. This cylinder is composed of two air-intake ports.

  • Each has an outstroke and an instroke.

Telescopic Cylinder

  • Single-acting and double-acting telescoping cylinders are also referred to as telescopic cylinders.

  • They are frequently used for applications where the piston must experience little side loading since their designs enable substantially longer strokes.

Single, Double & Reverse Acting Cylinder

Cylinders come in single acting, double acting, and reverse acting varieties. Double acting is the most typical, followed by single acting. Reverse-acting gets employed very rarely.