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The main structure and working principle of electric actuator
发表时间：2022-07-14
The main structure of electric actuator
The electric push rod is composed of a drive motor, a reduction gear, a screw, a nut, a guide sleeve, a push rod, a sliding seat, a spring, a casing, a turbine, and a micro-control switch. The electric push rod is a new type of electric actuator. The electric push rod is composed of a new type of linear actuator mainly composed of a motor, a push rod and a control device, which can realize remote control and centralized control. The electric push rod makes a reciprocating motion within a certain range of strokes. Generally, the standard stroke of the electric push rod is 100, 200, 250, 300, 400mm, 600mm, and the special stroke can also be designed and customized according to the requirements of different application conditions. Electric push rods with different thrusts can be designed according to different application loads. Generally, the maximum thrust can reach 10000N, and the no-load running speed is 4mm~35mm/s. The electric push rod uses a 24V/12V DC permanent magnet motor as the power source. The rotary motion of the motor is converted into linear reciprocating motion. Push a set of linkage mechanisms to complete the switching work of dampers, valves, gates, baffles, etc. The use of electric push rod as the actuator can not only reduce the air source device and auxiliary equipment required by the pneumatic actuator, but also reduce the weight of the actuator. Pneumatic actuators need a certain air pressure during the entire control operation process. Although amplifiers with small consumption can be used, the air consumption is still huge over time. Electric push rod actuators are used. When changing the control opening, power supply is required. When the required opening degree is reached, the power supply can no longer be supplied. Therefore, from the perspective of energy saving, electric push rod actuators have obvious energy-saving advantages over pneumatic actuators. It is suitable for long-distance operation and is widely used in the opening and closing, material loading and unloading, flow control, etc. It has been used by more and more departments to replace the automatic device of the mechanism hand, hydraulic valve and reduction transmission mechanism.
The working principle of electric actuator
After the motor is decelerated by the gear, it drives a pair of screw nuts. Turn the rotary motion of the motor into a linear motion, and use the forward and reverse rotation of the motor to complete the push rod action. For example, complex movements such as rotation and shaking can be completed through various levers, rockers or connecting rods and other mechanisms. The stroke can be increased or decreased by changing the lever arm length. Travel control device. Worm gear transmission form: the worm on the motor gear drives the worm gear to rotate, so that the small screw in the worm gear moves axially, and the connecting plate drives the limit rod to move axially accordingly. When the required stroke is reached, adjust the limit block Press the travel switch to cut off the power, and the motor stops running (positive and negative control are the same). Gear transmission form: The motor drives the small screw rod installed on the inner tube through the reduction gear, and drives the axial running nut connected with it. When the set stroke is reached, the nut feeler presses the limit switch to disconnect the power supply, and the motor Stop motion (same for reverse). An optional potentiometer can be used to display the stroke status of the push rod, and an encoder can also be added to realize the complete stroke in several steps (ie, stop and go). Features Novel and exquisite design, small size, high precision, complete synchronization, good self-locking performance, hygienic, direct motor drive, no need for pipeline air source and oil circuit, it has been widely used in RVs, window openers, sweepers, farms Animal husbandry, solar energy and other industries equipment.
