What do you need to know about linear actuators?
Important performance specifications to consider when considering for linear actuators include stroke, maximum rated load or force, maximum rated speed, continuous power, and system backlash. Stroke is the distance between fully extended and fully retracted rod positions. The maximum rated load or force is not the maximum static load.
What kind of motor does an electric actuator use?
Electric actuators are a combination of a servo motor with worm gear to prevent reversal of drive direction by an unbalanced load. Generally, three-phase AC motors that deliver higher torque (ranging up to >80,000 NM) are deployed. However, single-phase AC or DC motors have also been used, but infrequently.
How is the load of an electric actuator determined?
In linear electric actuators, the load is connected to the end of a screw that is belt or gear driven. Important factors to consider when selecting linear electric actuators include the number of turns, actuating force, and the length of the valve stem stroke.
What happens when power is removed from an actuator?
These actuators have a separate power supply from the control signal. This second power supply powers a “clutch” that disengages the spring from the actuator when the power is on. When power is removed, the spring engages, returning the actuator to its normal position regardless of the control signal.
When you understand the basics it will be much easier for you to select your own electric linear actuator . What is an Actuator? An actuator is a device that requires an energy source input and an external signal input. These inputs create an output usually in the form of motion that can be either rotary or linear.
What’s the best way to mount an actuator?
Plain bearing or sliding systems often have greater clearance and may be even more forgiving. When installing linear actuator mounting systems there are a number of measurement tools available to help assure proper alignment ranging from gauges to laser systems.
How is an actuator used in a guide system?
A rod-style actuator in such a system is best employed with some compliance member between the drive member (actuator) and the driven (guide system). For example, a spherical rod end mounted to the actuator rod allows the mounting point to swivel about the spherical joint.
What are the components of an actuator system?
Following are the usual components that are part of the functioning of an actuator: Power source: This provides the energy input that is necessary to drive the actuator. These are often electric or fluid in nature in the industrial sectors.