Industry news

Application principle and selection of PV tracking electric linear actuators

2020-01-18
The PV tracking electric linear actuators is mainly composed of driving motor, reduction gear, screw, nut, push rod, spring, micro motion control switch, etc. it is a kind of electric driving device that transforms the rotation motion of motor into linear reciprocating motion of push rod, widely used in furniture, electronics, machinery, medical treatment, metallurgy, transportation, petroleum, chemical industry, transportation, construction and other industries.

The PV tracking electric linear actuators is a new type of electric actuator. Its shell is heavy-duty aluminum shell. It is mainly composed of drive motor, reduction gear, screw, nut, guide tube, guide sleeve, push rod, mounting base, spring, shell, worm gear, micro motion control switch, etc. the easy-to-use interface and integrated power electronic device interface are directly connected to the control system, which can realize remote control and centralized control System. Generally, the two-stage drive is adopted, and there are two main types of first-stage drive deceleration, one is worm gear deceleration, the other is gear deceleration; most of the second-stage drive adopts lead screw nuts.

Worm gear and worm reduction: the output shaft worm of the motor drives the worm gear to rotate, making the screw rod connected in the worm gear rotate, and the nut on the screw rod moves axially in the guide tube. When it reaches the required stroke, the nut boss presses down the stroke switch to cut off the power, and the motor stops running, with the same positive and negative control.


Gear deceleration: after the motor is decelerated by gear, a pair of lead screw nuts are driven, and the nuts are connected with the push rod, so as to change the rotary motion of the motor into the linear motion of the push rod, and complete the push rod action by using the forward and reverse rotation of the motor. Through various levers, rockers or connecting rods and other mechanisms, complex movements such as rotation and shaking can be completed.

The power source of the PV tracking electric linear actuators is 12V / 24V DC motor, which has a matched power controller. The input voltage of the controller is generally 110V / 220V, and the output voltage is 12V / 24V, which is used for the operation of the PV tracking electric linear actuators. The PV tracking electric linear actuators moves back and forth within a certain range of travel. The standard travel of the general PV tracking electric linear actuators is 50, 100150200250300350400mm. The special travel can also be designed and customized according to the requirements of different application conditions. The PV tracking electric linear actuators with different thrust can be designed according to different application loads. Generally, the maximum thrust can reach 6000N, and the empty load speed can be 3mm ~ 45mm / s.

Using the PV tracking electric linear actuators as the actuator can not only reduce the air supply device and auxiliary equipment required by the pneumatic actuator, but also reduce the weight of the actuator. Compared with the hydraulic cylinder, the PV tracking electric linear actuators does not need the hydraulic source, and does not need the support of a complex set of systems, including pumps, pipes, valves, filters, and many joints, which are more energy-saving and convenient to use.

The main factors to be considered when selecting the PV tracking electric linear actuators include thrust, speed, stroke, working environment, working mode, control mode, etc. in addition, accessories such as limit switch and Hall effect sensor can be added according to the use. The working system of trapezoid lead screw of push rod elevator is generally 10-25%, and that of ball screw is 90-100. When the stroke is more than 300 mm, the stability of push rod shall be verified. The push rod elevator shall not be overloaded and operated for a long time. When it is used to generate lateral force, a guide device shall be installed to ensure the stable operation of the equipment.
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