Belt conveyors for bulk materials by Conveyor Equipment Manufacturers Association. Engineering

By Conveyor Equipment Manufacturers Association. Engineering Co.

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Extra resources for Belt conveyors for bulk materials

Sample text

In order to assist the reader in the use of this data, two different methods for determining tension and power requirements are illustrated. The graphical method, shown on page 141, is used to calculate quickly and conveniently the horsepower required to drive a conveyor. Belt tensions can be determined based on these calculations of horsepower. This method is suitable for use in designing simple, straightline, horizontal, or inclined conveyors. The analytical method, described on page 145, provides calculations of all belt tensions as they occur along the conveyor, thus determining magnitudes at intermediate points.

The CEMA design criteria in this manual are somewhat conservative and are based on many field trials over a wide range of operating conditions for average size conveyors. Advanced technical design methods are often required for high energy, high tension conveyors having some of the following conditions: Length over 3,000 feet Horizontally curved Head and tail driven High lift Large decline with braking requirements Undulating geometrics Dynamic analysis and computer modeling is often used in assessing the dynamic action and control of long overland and high lift, high horsepower conveyor systems.

Component parts are usually housed and have very long life compared with that of motor vehicles. Usually, they need only scheduled inspection and lubrication. Any repairs or replacements can be anticipated and unscheduled downtime avoided. Parts are small and accessible so replacements can be made on the site quickly and with minimal service equipment. Also, adequate inventories of spare parts can be maintained at a low cost and require relatively little storage space. Long-Distance Transportation The economic benefits of low operating costs for labor and energy, as well as some of the other advantages outlined above, have led to a widespread adoption of belt conveyor systems as a means of transporting bulk materials over increasingly long distances.

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