Conveyor Belt Motor Control

- Apr 03, 2019-

Light conveyor belts mainly include PVC conveyor belts, rubber and plastic products conveyor belts, PU conveyor belts, etc., which are widely used in food, logistics, electronics, tobacco, wood, stone, fitness and other fields. The suitability of the conveyor belt motor directly affects the smooth running and conveying capacity of the conveyor belt. Therefore, how to choose a suitable matching motor is an important part of the conveyor belt design. This paper analyzes the selection and calculation of the conveyor belt motor. .

        A CD manufacturer's packaging workshop carries out technical transformation. The project is for the connection production of two packaging machines. The scheme is to use the conveyor belt to be transported by robot, and the whole is controlled by PLC, supplemented by pneumatic components, positioning components, low-voltage circuit components, mechanical transmission. Components, etc., form a closed loop control loop. The basis for the selection of the conveyor motor and related calculations are as follows:

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First, the analysis of working conditions:

       The maximum output of the SKS packaging machine is 6120 boxes per hour. The general output of the lower machine packaging machine is 70 bags per hour, which is 7,000 boxes per 10 boxes. The conveying capacity of the conveyor belt should be greater than the production speed of the machine. The production speed of the conveyor belt is determined to be 6,500 boxes per hour, 65 bags, and the size of the CD case is 142×124×10, so the minimum conveying speed of the conveyor belt is 9.23 meters per hour. At 0.154 meters per minute, and the conveyor belt drive rod diameter is Φ20mm, the conveyor belt drive stick speed is at least 2.45r/min.

The weight of a box of CDs is 70 grams, one package is 10 boxes, 700 grams, and the conveyor belts generally have 5-7 bags, so the conveyor belt has a delivery weight of 3.5KG-4.9KG, and the maximum weight is 5KG. Due to the material positioning, the conveying distance is required to be accurate, and the over-rotation amount is small. Therefore, the motor must have the following characteristics: braking and holding the load after the power is cut off; braking speed is fast, the amount of over-rotation is small; frequent starting can be achieved. Calculate 65 bags per hour, that is, deliver 1 bag for 55 seconds, so the motor must start and stop at least 2 times per minute.

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Third, determine the model of the motor and related accessories.

Combined with the actual use of power supply and spare parts in the factory, the electromagnetic brake motor is selected, the model is 60-YB-06D-V22 (frame size 60, YB electromagnetic brake motor, 6W round shaft, single phase 220V); supporting gearbox model It is 60-GK-60H (frame size 60, 6W reduction gearbox, reduction ratio 60, standard structure); it is connected directly to the conveyor belt drive rod with elastic coupling, elastic

The coupling type is 28MC08-08 (nominal outer diameter Φ28, inner diameter is Φ8); motor right angle mounting foot type is RAL60.

Fourth, the conclusion.

After the actual application, the motor power is selected moderately, the conveying speed is suitable, the operation is stable, and the failure rate is low, which fully meets the design requirements. Through the analysis of working conditions, design examples, load calculations, etc., the motor can be selected reasonably, safely and reliably. The above is only the process of selection and installation. For the wiring of the control circuit, please refer to other literature.