The main role of belt conveyor tensioning device
The tape has a certain tension to generate sufficient friction between the tape and the drive roller to ensure that the drive roller drives the tape to operate normally. The tensioning device is an auxiliary device that provides tension for the normal operation of the belt conveyor, and is indispensable in the belt transportation system. Specifically, the main functions of the tensioning device are:
(1) Ensure that the conveyor belt has sufficient tension at the separation point of the drive roller to ensure friction transmission conditions.
(2) Ensure the minimum sag condition of the conveyor belt in the minimum tension area.
(3) Compensating for the permanent elongation caused by the long-term operation of the conveyor belt, so that the conveyor belt always maintains a certain tension.
(4) Sometimes it can also act as a reservoir. In the design and manufacture of the belt conveyor, the tensioning device must be reasonably selected to ensure the safe operation of the conveyor and is economical.
Characteristics of several tensioning devices of belt conveyors At present, the tensioning devices of belt conveyors mainly include: screw tensioning, manual twisting tensioning, heavy hammer tensioning, tensioning vehicle tensioning, hydraulic tensioning and the like.
The screw tensioning and twisting tensioning device takes up less space, is simple to manufacture, and has low cost. It is suitable for belt conveyors with less tension within 100m. The tension is not adjustable, it requires frequent maintenance, and it is often adjusted by manual. Tight force. The vertical tensioning device occupies a large space, is simple to manufacture, and has low cost, and is suitable for the ground trestle belt. Tightening car + heavy hammer block tensioning form, simple to make, easy to maintain, low cost, adjustable tension and stroke, suitable for large angle belts. Tensioning car + winch tensioning device, simple to make, mechanical winch needs maintenance, tension and stroke can be fine-tuned, the cost is slightly higher, suitable for belt conveyor within 1000m. The automatic hydraulic tensioning structure is complex, the tension and stroke are adjustable, and the cost is high, which is suitable for large belt conveyors.
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