Rotary actuators -Their working principle and applications!

Rotary actuatorsRotary actuators are actuators that, simply put, produce rotary motion that we like to call torque.Torque occurs when a force acts on a radius. When it comes to rotary actuators, we use torque to identify and rate their purposes. The typical units of measurement for torque are foot-pounds (ft-lbs).

The simplest actuators that we know of are purely mechanic. They work on a very simple and basic principle. There, a linear motion in one direction gives rise to a rotation. Nevertheless, nowadays we power electrically the most common rotary actuators. Of course, there are other types of actuators that may get power by hydraulic of pneumatic power. In addition, they are also use energy internally through springs.

Rotary actuators  -Their working principle and applications

Rotary actuatorsWhen it comes to simple rotary actuators, the movement is fix- it applies to a certain angular position. This we can see in stepper motors or servomotors. As for electric motors, the rotary actuator usually produce a continuous rotation. Furthermore, a torque motor doesn’t necessarily produce any rotation but, just generates a precise torque. That torque then causes rotation or is maybe balanced by some opposing torque.

Needless to say, rotary actuators  have a vast range of applications. We choose a rotary actuators depending on the size, power and operating speed. The physical setup of a fluid system, or whatever system there is, is essential to picking the right rotary actuator. Also, the torque output is what’s really important for designers. They take into consideration the relationship between the toque output and the physical setup to determine the right rotary actuator.

To understand how these actuators actually work, you need to look at their working principle a bit closer. In the video below, everything is thoroughly explained, in a simple matter. You’ll find out the basics of torque, how you can calculate it and the different approaches to reach a certain torque unit.