Pneumatic Actuator

Rod less Cylinder- Mechanically Coupled

In previous page we already share the Pneumatic actuator can be clasified as
1. Single Acting Cylinder
2. Double Acting Cylinder.
In this page we would like to inform you the Double Acting Cylinders, here the explanation :

Rod less Cylinder - Mechanically Coupled

         The cylinder barrel is provided with a slot across the entire length. The force is
transmitted through a slide permanently connected to the piston. The connection from
piston to slide is directed outwards through the slotted cylinder barrel. The slot is sealed
by means of a sealing band, which seals the inside of the slot. The sealing band is guided
between the piston seals and passed under the slide. A second metallic cover strip,
covers the slot from the outside to prevent the ingress of dirt

Rod less cylinder mechanically coupled

Rotary Actuators

•In order to achieve angular motion, Rotary Actuators are used. Rotary actuators are
mainly available in two designs.
•Vane type Construction: Further these actuators are available with 1800 rotation or 2700
angle of rotation. These actuators can be used for low torque requirement up to 10 N-m.
•Rack and Pinion type construction: Can be used for angle or rotation close to 3600.
These actuators can develop torques up to 100-150 N-m depending on the diameter of the
cylinder

Vane type Rotary Actuator

•A rotating vane connected to a shaft divides cylindrical chamber in to two compartments.
Compressed air is alternately admitted and exhausted from the chambers. The compressed
air pressure acting on the vane surface results in a torque. Hence rotary motion is obtained.
•The magnitude of the torque produced, depends on the surface area of the vane, air
pressure and mean radius of the vane.

Vane Type Rotary Actuator

Vane Type Rotary Actuator

Rotary Actuator of Rack and Pinion Type

This is essentially a double acting cylinder with a rack arrangement provided on the
piston rod and a pinion engages with this rack. Out put rotation of the pinion shaft can be
used for obtaining angular motion from 0-3600. This type of rotary actuators are used for
higher torque requirement up to 150 N-m.

Rotary Actuator - Rack and Pinion Type

Cylinder Seals

•Cylinder seals of single cup or double cup type are often used for dynamic sealing
between piston and cylinder walls.
•Single cup seals are used for single acting cylinder and double cup seals are used in
Double acting cylinders

Single and Double Cup Seals

Sealing material such as Perbunan, Viton and Teflon are commonly used. Per bunan seals
are used for temperatures in the range of –200 C to 800 C while Viton seals are used for
high temperature range from –200 to 2000 C. Teflon seals have applications at low
temperature range –500 to 2000 C

Mounting Arrangement for cylinders

Mounting Arrangement of Cylinder

The type of mounting is determined by the manner of fitting the cylinder to fixtures and
machines. Flange mounting arrangement is generally used for small cylinders. Large
cylinders are usually foot mounted.

So far all kind of pneumatic cylinder already explained and share, ih the next page we will explain the Directional Control Valve. So stay on this URL and thank you for visiting my blog.