Actuator and accessory are mechanical or electro-mechanical devices that provide controlled and sometimes limited motion. Or positioning to be operated by electricity, by hand, or by various fluids such as air, hydraulics , etc.
The two basic motions are linear and rotary. Linear actuators convert power to linear motion, typical for positioning applications. And often have a push and pull function.
Some linear actuator and accessory are not powered. And hand operated by using a rotary knob or hand wheel. The rotary actuator converts the power to provide rotational motion. A typical use is to control different valves such as balls or butterflies.
Each actuator and accessory has different versions for electrical configurations. And has many designs and sizes depending on the application. Linear actuators offer push and pull motions with rigid lugs.
Linear electronic controllers are electrically powered, mechanical devices including motors, linear guides. And actuator and accessory are used to transfer electrical energy to linear displacements via mechanical transmission. Magnetic, magnetic or thermal expansion to provide direct / push movement.
Main specifications include the intended application, drive type, engine type, mounting configuration. As well as physical dimensions and electrical characteristics. Linear actuators are used primarily in automation applications where a machine component, tool, etc.
Requires a controlled motion to a particular position. They are used in many industries where linearity is required. The actuator and accessory are controlled by a number of means including ball or conductive screws, belts, or voice coils.
Electronically-powered electric locomotives, mechanical devices including motors. And out-of-rotation rotation mechanisms are used to transfer electrical energy to rotational motion. Main features include the intended application, steering method, position number, output configuration, mounting configuration as well as physical dimensions and electrical characteristics as required.
Electric dial switches are mainly used in automation applications when a gate, valve, etc. Require motion control to special rotary positions. They are used in many industries where it is needed. The actuator and accessory are controlled by different types of motors, voice coils, etc. Typical applications include one-stop valves, windows, robots, etc.
Linear actuators are mechanical devices consisting of cylinder and piston mechanisms that produce linear displacement with different liquids, gases or pressures. Main features include intended application, type of liquid capacity, mounting configuration, travel length, and capacity, as well as physical dimensions as required.
Liquid linear drives are mainly used in automation applications. Where an item requires a controlled motion to a specific location. They are used in many industries where linearity is required. Typical applications include opening and closing drilling, clamping, welding, and so on.
The rotary actuator is a liquid actuator and accessory, mechanical devices including cylinder and piston mechanisms, transmission shafts and output shafts that allow for limited turnaround. Which are used to convert hydraulic pressure , air or air difference to rotational motion. Main features include intended application, fuel type, transmission, mounting configuration, output configurations, rotation limits and load capacity as well as required physical dimensions.
Rotary power drives are used primarily in automation applications where an item requires a control dial motion to a specific location. They are used in many industries where they need to be rotated. The actuators are supplied by various means including air or other gases and hydraulic fluids.
The chain actuator and accessory are mechanical devices that include gears and segments of the chain used to provide linear motion through the ends of the strings designed special. The main features include the intended application, the method and the driving mechanism, the length of the operation, the size of the chain, and the mounting configuration.
Linear actuators are mainly used in motion control applications to create a linear motion or drag. Chain, when straight locked into place with adjacent links and forming a rigid member. They come in many sizes and chain styles, as well as string storage options depending on the space available in a particular application. Transmitters usually have single gears or gears generating the force required for thrust and thrust.
Hand-operated controls are mechanical devices that provide linear displacement through the translation of screws. Or handwheel gears and include handles or wheels, gearboxes and movement mechanisms, guided linear. Main features include the intended application, type of actuator and accessory, steering mechanism, travel length and other physical dimensions as required.
Manual transmissions are used primarily in commercial applications for precise positioning as manipulators or workpieces. Manual controls are not powered and use a rotary knob or hand wheel to operate. Various types, including lead screws, racks, flywheels, belt drives, etc. All have specific loads and drive capacities. Thermodynamic drives are another type and operate by thermal expansion, usually on a small scale.
Manual transmissions are mechanical devices that provide a rotary output through the translation of screws, levers or gears by hand, and usually include handles, levers, handrails, gearbox or threading mechanism, and expulsion. Main specifications include intended application, method and steering mechanism, mounting configuration, valve type, if available, as well as physical dimensions as required.
Manual transmissions are mainly used for valve operation. They are also called manual control valves or control valves. Valves can include ball, butterfly, check valve, and globe. Other applications may include any request for restriction and flow control.
Actuator and accessory usually incorporate motors, cylinders, or other moving devices to produce linear rotation or translation. Assembled and pinion arrangements, ball screws, and other types of transmission components connect the motor, etc. to the load.
There are separated by motion and power. Linear actuators produce push / pull action. Rotary actuators produce rotary motion. In many cases, the linear actuator starts with a rotary motor – a typical motor – which rotates into linear motion via a screw or similar device.
many rotary actuators can start with linear devices such as hydraulic cylinders that produce circular motions through arrangement of racks and gears.
The Actuators are widely used to operate valves remotely. A valve equipped with so-called control valves. (See the Valve Buying Guide for a discussion of control valves.) A typical actuator and accessory for a global valve needs to be capable of rotating the valve through multiple turns between opening and closing.
Typically, a global valve actuator will consist of an electric motor that drives the gear, which in turn rotates a nut with the threads of the valve body. Flip-flops such as ball valves usually use pneumatic actuators to push and pull the gearboxes through the gears to allow rotation of the ball, butterfly etc. In short, Valve actuators correspond to the valve design they are intended to operate.
There are also used in many linear motion applications where air is not available to control cylinders or need more force from the compact design. An abnormal linear drive uses a line that when straight forms a rigid length but can bend around the rudder to get its motion. Other linear motion actuators use a belt, a screw, or a rack and pinion to achieve push / pull operation. Linear and rotary actuators generally use coil motors directly.
As well as in a wide range of industrial applications ranging from aircraft to rail. Linear actuators sometimes incorporate stepper motors with ball screws to achieve precise controllable position (left).
Transmission Both linear and rotary actuators are available in the form of manual models used as slide actuators, and as controllers for manual control valves. In some cases, the manual control valve is used as a replacement for a conventional control valve activated by an electric drive or electric motor (right). They are designed to remove the actuator and accessory controls during normal automatic operation so as not to harm the outsider.
Selecting actuators supported requires knowing the parameters such as load, stroke length, duration, etc. Many of these parameters have speed limits and force and narrow the selection according to This way can bring appropriate technology. Other considerations include the types of services available. Hydraulic transmission provides great power at small sizes but requires a hydraulic pressure source.
The actuator uses the available air of the plant but there is a balance made due to the larger size for the equivalent force. Electric actuators have better control and less leakage advantages, which are advantageous in clean room settings and more economical in the long run. Electric actuators tend to have higher initial cost. They also have the advantage of being installed outdoors, where air systems can freeze.
Dual operation and spring return. Dual action means that air pressure will move the valve in both directions. Spring back means that a spring is used once that the air pressure must pass to open (or close) the valve. It makes a difference how the valve will behave when air pressure is lost. Spring return valves will return the valve to the unused state when the air pressure is lost. Hydraulic valve drives can be fitted in similar fashion.
Transmission For motion control, the actuator and accessory are selected based on the required speed and accuracy. Some linear actuators are designed for micro positioning. And rely on piezoelectric crystals to produce very small resolution movements that are very useful in the nanometer world of optics.
In general, belt drives and screws allow locating the positioning stages. And the like to achieve repeatability measured in milliseconds of an inch. Some linear actuators are used with manual controls, such as those found in dental chairs and require no other position feedback with limited switches. Some manufacturers even remove the limit switches by providing integrated free-form motion at the end of the stroke. Such as the actuator and accessory shown on the right.