What is a High Torque rotary actuator?
Basically, a rotary actuator is simply an actuator that has been designed to produce a rotary motion or torque. They are capable of transforming electric energy, hydraulic, or pneumatic energy into the mechanical rotation. Most people have defined rotary actuators as the hydraulic or pneumatic equivalent of electric motors. For a rotational or twisting effort (torque), a rotary actuator happens to be more compact than any equivalent motor, can be used for operations in an explosive environment (or an environment that is prone to explosion), and cannot get damaged by an indefinite stall. When it comes to applications and maintenance requirements, a rotary actuator could be said to be similar to DC drive that is thyristor controlled. A rotary actuator is defined in terms of the number of torques it produces as well as its overall running speed.
While high torque rotary actuators are capable of transforming electric, hydraulic, and pneumatic energy into mechanical rotation, it is best that we discuss how they do this.
On one hand, pneumatic actuators make use of compressed air to generate movement in back and forth motions. There are actually two main configurations of pneumatic actuators; rack and pinion and vane configurations. The rack and pinion configuration of pneumatic high torque rotary actuators are made up of just a piston and rack that move in a linear position and cause an output shaft and pinion gear to rotate. On the other hand, a vane actuator consists simply of a vane that is mounted on a central shaft that is enclosed in a cylindrical chamber. Upon pressurization, the vane continues to rotate and does so until it gets to the end of the stroke. There are actually a number of advantages this type of high torque rotary actuator has.
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