Linear Actuators: Types and Characteristics

A Linear Actuator is completely different from electric motor because it applies power in a linear way instead of rotationally. The linear motion will be achieved in numerous ways and a linear actuator is one of the devices that may covert rotational motion to linear motion.

Mechanical type

A mechanical actuator converts the rotary motion to linear displacement by way of screws/gears to which a knob is attached. One of the renowned examples of mechanical actuator is a jackscrew or automobile jack. Mechanical actuator is utilized in lasers and optics for manipulating the position of mirror mounts, linear stages and many more positioning instruments.

Hydraulic type

A hydraulic actuator or cylinder has a hollow cylinder with a piston inside it. Controlled linear displacement of the piston is achieved by pressurizing/de-pressurizing two sides of the piston. Hydraulic automobile jack is the most common example of a manually operated hydraulic actuator.

Electro-mechanical type

A linear electromechanical actuator is a in which a nut is the primary a part of the motor. The lead screw of the actuator doesn’t rotate and the lead nut is rotated by the motor. It’s similar to mechanical actuator however an electric motor is used instead of a control knob or handle.

The trendy linear actuators come in numerous designs and every manufacture has their own proprietary methods of making actuators.

Principles of Linear Motion Actuators

The essential operation principle of linear motion actuators is an inclined plane. The lead screw has threads, which act as ramp and allow small rotational power that can be utilized over long distance for achieving the movement of huge load within a shorter distance.

Variations in Linear Movement Actuators

There are completely different variations in the basic design of linear actuators. A lot of the units have general improvements like higher velocity, efficiency or load capacity. Nowadays, producers are additionally focusing more on reducing the dimensions of those actuators. There may be variety of actuators available in market, which fits particular industrial wants of buyers.

What make linear motion actuators better in comparison to different motors are their quicker speed, higher accuracy and higher acceleration. These are used for gantry axes, general purpose position, gantry axes and meeting machines. Linear actuators are specifically meant to be used in adverse conditions and act as replacement against other hazardous actuators for performing the job.

Other than linear actuators, DC actuators are also used for performing related applications. These run smoothly and do not produce a lot noise. Many DC actuators available in the market are water proof. Buyers can go for commonplace as well as custom-made range of actuators depending on their need and budget.