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Replace V Belts With Cogged Belt V Drives

Views: 0     Author: Site Editor     Publish Time: 2019-07-07      Origin: Site


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About one-third of the electric motors in the industrial and commercial sectors use belt drives. Belt drives provide flexibility in the positioning of the motor relative to the load. Pulleys (sheaves) of varying diameters allow the speed of the driven equipment to be increased or decreased. A properly designed belt transmission system provides high efficiency, decreases noise, requires no lubrication, and presents low maintenance requirements. However, certain types of belts are more efficient than others, offering potential energy cost savings.

The majority of belt drives use V belts. V belts use a trapezoidal cross section to create a wedging action on the pulleys to increase friction and improve the belt’s power transfer capability. Joined or multiple belts are specified for heavy loads. V belt drives can have a peak efficiency of 95 percent to 98 percent at the time of installation. Efficiency is also dependent on pulley size, driven torque, under or over-belting, and V belt design and construction. Efficiency deteriorates by as much as 5 percent (to a nominal efficiency of 93 percent) over time if slippage occurs because the belt is not periodically retensioned.

Cogged v belts have slots that run perpendicular to the belt’s length. The slots reduce the bending resistance of the belt. Cogged v belts can be used with the same pulleys as equivalently rated V belts. They run cooler, last longer, and have an efficiency that is about 2 percent higher than that of standard V belts.

Synchronous belts (also called timing, positive-drive, or high-torque drive belts) are toothed and require the installation of mating toothed-drive sprockets. Synchronous belts offer an efficiency of about 98 percent and maintain that efficiency over a wide load range. In contrast, V belts have a sharp reduction in efficiency at high torque due to increasing slippage. Synchronous belts require less maintenance and retensioning, operate in wet and oily environments, and run slip-free. But, synchronous belts are noisy, unsuitable for shock loads, and transfer vibrations.

This article comes from achrnews edit released

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