Linear Actuator Applications

The concept of a linear actuator is a simple one: A linear actuator generates motions in a straight line. This technology allows for a great deal of repeatability, speed and efficiency in automation systems. Linear actuators are available in electric, hydraulic and pneumatic varieties, although electric applications are becoming increasingly common.

The reason behind this shift is that electric linear actuators provide energy efficiency, as well as high levels of control and precision. However, pneumatic actuators may be a better choice in hazardous or harsh environments. Each actuator technology is not without benefits, but identifying the right type for an application is critical.

Beyond knowing the benefits of actuators, it is helpful to know in which applications linear actuators are used. This blog explores the different applications and industries where these components can be found.

What are the Applications of Linear Actuators?

Linear actuators are versatile devices used across multiple sectors ranging from everyday consumer products to industrial machinery. One of the reasons for their wide application is because there are different types available to suit a variety of functions, for example:

• Electric linear actuators: Offer a compact footprint and accuracy, so they are often used in small devices or those requiring precision motion.
• Pneumatic linear actuators: Can be used safely in hazardous locations and are common in manufacturing equipment because they’re simple, reliable, low cost, and operate with compressed air, which is a staple in production facilities.
• Hydraulic linear actuators: Favored in heavy-duty equipment because they provide the strong force needed to effectively move heavy loads.

What are the Real-Time Applications of Actuators?

A new generation of “smart” actuators provides immediate, continuous sensor-driven response to enable real-time motion control. Real-time application of linear actuators typically involves a closed-loop control system, which allows the actuator to make on-the-fly adjustments based on sensor feedback for optimized precision.

Smart actuators are fundamental in providing high-speed, dynamic motion control in industrial automation systems. Some examples include:

• Material handling: Multiple actuators can be synchronized to create smooth, fast conveying systems.
• Assembly lines: Smart actuators provide swift, precise movement in pick-and-place robots and CNC machine tending.
• Process control: Smart actuators enable critical flow adjustments in real time for applications such as valve automation in water treatment facilities, chemical processing and food and beverage production.

To effectively perform in these applications, linear actuators must be equipped with “smart” technology, such as built-in sensors for real-time positional feedback and self-diagnostics. Electric linear actuators are often the choice here because they permit remote monitoring and adjustment via digital control systems.

Industries and Applications that Commonly Use Linear Actuation

The following list of industries and applications will give you an idea of the width and breadth of uses for linear actuators.

Aerospace

In this high-stakes industry, linear actuators are used because they are highly reliable, lightweight and precise. In aerospace applications, linear actuators:

• Move aircraft flight control surfaces, such as rudders, elevators and ailerons.
• Operate landing gear actuation systems.
• Provide trim and flap actuation.
• Provide specialty actuation for ice vanes and cargo handling systems.

Manufacturing

Linear motion has revolutionized manufacturing by increasing the efficiency and safety of automated equipment. For example, in material handling applications, electric linear actuators provide flexibility and safety because they enable equipment to stop part-way through various motions.

Robotics

Robotic technology relies heavily on the dependability and control of linear actuation, which enables motion in cartesions, pedestals, grippers and other robot appendages. Many robotic applications use linear motion, including:

• Pick-and-place robots.
• Injection molding equipment.
• Packaging and palletizing systems.
• Quality inspection systems.
• Assembly robots.
• Machine tending robots.

Food and Beverage

Today’s food and beverage production lines must provide high output at a low cost. Linear actuation is a large piece of that puzzle. From station cleaning to conveyors, linear actuation creates motion for food and beverage applications.

For example, with proper options specified, pneumatic rod-style linear actuators are used in washdown applications and electric linear actuators are often used in automated food processing equipment.

Windows and Doors

Window and door production is difficult because these products are heavy and cumbersome to move. Linear actuation is used in the manufacturing process to reduce the ergonomic strain on employees.

Linear actuators can also be found inside windows and doors, where they serve as the mechanism that enables opening and closing.

Automotive

Electric linear actuators offer flexibility in many automotive applications. For example, linear actuators can be found in the vehicle systems that open doors, trunks and roofs. And, linear actuators are used for automotive manufacturing applications that require parts to be lifted or shifted.

Agriculture

Farmers are under tremendous pressure to produce as many products as possible while under seasonal constraints. Automation featuring linear motion helps them work smarter. Much of the equipment from cleaning equipment to spraying systems to harvesting machinery features systems powered by linear actuators, increasing production efficiency.

Energy

Linear actuation is paving the way for alternative energy sources. Electric actuators can be used within solar panels, allowing them to move with the sun and capture as much sunlight as possible. Linear actuators are also used to vary pitch of the blades of turbines, harnessing energy from wind.

What are the Common Applications of Actuators in Smart Homes?

Today’s smart homes are made possible due in part to linear actuators, which provide quiet, reliable operation of smart household devices, enhancing convenience and comfort at home.

Common applications include:

• Adjustable beds: Linear actuators enable easy elevation of the head and foot sections for customized comfort.
• Automated TV lifts: They raise and lower televisions into and out of cabinetry.
• Smart blinds/curtains: Linear actuators enable automatic adjustment of window coverings based on time or sunlight to manage light and save energy.
• Furniture: They power the movement in recliners, adjustable-height desks and hidden cabinet storage.

What are Linear Actuators Used for in Everyday Life?

Aside from industrial and smart home applications, linear actuators are used in objects and places we encounter in our everyday lives, including:

Healthcare: Linear actuators ensure patient comfort and safety and are used to adjust the position of hospital beds, patient lifts and mobility scooters. They also provide precise movement in medical imaging equipment, such as MRI and CT scanners.

Ergonomics and comfort: Linear actuators enable the motion in adjustable standing desks and workstations, recliners and home theater seating for customizable comfort.

Public/commercial spaces: Linear actuators open and close automatic sliding doors and gates, providing automated access. They also control vents and dampers in HVAC systems for precise climate control.

Contact JHFOSTER for Your Linear Actuator Needs

Whether you need an electric, hydraulic or pneumatic linear actuator, selecting the best device is key to unlocking the efficiency and reliability of your system. For help finding the right linear actuation technology for your application, contact a JHFOSTER automation specialist today.