3.1 Pneumatic actuators 3.2 Hydraulic actuators
The work carried out by a pneumatic
actuator can be linear or rotary:
Linear motion is obtained by plunger
cylinders (these also provide rotating
movements with an angle of up to 270o
by means of pinion-pinion-throwtype
actuators) For continuous rotational
motion
continuous-rotating pneumatic motors
are used. These actuators are based, for their
operation, on the pressure exerted by a
liquid, usually a type of oil.
Machines that are normally made up of
hydraulic actuators have higher speed and
mechanical strength and are large in size, so
they are used for applications where they
require a heavy load.
Characteristics of pneumatic actuators:
Sor internal friction is as low as possible,
its assembly or installation is as simple
and fast, its service life is as long as
possible. there is a wide variety of designs
to adapt them to various needs, can be
used with or without lubrication, can
withstand temperature, and compression
and traction efforts to which it will be
subjected, has great damping capacity,
has the possibility of detecting its running
position