How to improve the belt conveyor load capacity?
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- Issue Time
- Dec 26,2018
By analyzing the calculation formula of the belt conveyor load capacity, the following conclusions that can be instructive for the belt conveyor design can be obtained:
(1) Under the condition that the width of the conveyor belt and the speed of the conveyor belt are constant, the load capacity of the belt pulley's driving wheel is mainly determined by the following factors:
1 belt conveyor drive wheel output side belt tension T0
2The friction coefficient between the belt pulley and the inner side of the belt is μ0
3 wrap angle between the belt conveyor belt and the driving wheel
(2) An effective way to provide the load capacity of the belt conveyor
1 belt conveyor increases the driving wheel output side belt tension T0
Increasing the belt tension of the output side of the driving wheel can provide the power transmission capability of the belt conveyor. However, the belt's working stress is increased after the belt tension is increased, the strength of the belt must be provided, and the belt manufacturing cost is inevitably increased, so this is not The best method, this method is generally not used in engineering.
2 belt conveyor increases the friction coefficient between the driving wheel and the inner side of the belt μ0
Since the maximum traction force generated by the belt at the driving wheel is exponentially increasing between the friction coefficient μ0, increasing the friction coefficient between the driving wheel and the inner side of the belt can effectively improve the load capacity of the belt conveyor. The most preferred method of engineering.
3 belt conveyor increases the wrap angle α between the belt and the drive wheel
The belt has an exponentially increasing relationship between the maximum traction force generated by the driving wheel and the wrap angle α. Therefore, increasing the wrap angle between the belt and the driving wheel can very effectively improve the load capacity of the belt conveyor system, which is also engineering. The preferred method. By adopting the tensioning wheel and designing the appropriate tensioning position and adjusting direction of the tensioning wheel, the belt wrap angle can be effectively increased, thereby effectively increasing the driving friction between the driving wheel and the belt. Increasing the wrap angle is also increasing the contact area between the belt and the drive wheel. Usually in the design, the gradual wrap angle of the driving wheel and the belt should be no less than 120°, and the tensioning wheel can be adjusted to 210°~230°.
4 belt conveyor increases belt width
Increasing the belt width actually increases the contact area between the belt and the driving wheel, thereby increasing the driving friction between the driving wheel and the belt. However, increasing the belt width not only increases the cost, but also takes up more space unnecessarily, so this method is generally not used.
In summary, the most effective way to improve the load capacity of the belt conveyor is:
• A sufficiently large wrap angle should be designed between the belt and the drive wheel;
• Increase the coefficient of friction between the drive wheel and the inside surface of the belt as much as possible.
Therefore, when designing the belt conveyor, special attention should be paid to ensure the wrap angle between the belt and the driving wheel. At the same time, the friction coefficient between the driving wheel and the inner surface of the belt should be increased as much as possible. Generally, the following measures can be taken to improve the driving wheel and belt. Coefficient of friction between surfaces:
(1) The surface design of the driving wheel is processed into a textured surface and hardened at the same time.
(2) Change the material pairing between the driving wheel and the belt. For example, it is a very common treatment to insert a layer of rubber on the outer surface of the driving wheel.
