Coupling and Joints [design, selection, application] by Jon R. Mancuso

By Jon R. Mancuso

"Second variation offers new fabric on coupling rankings, basic goal couplings as opposed to targeted objective couplings, retrofitting of lubricated couplings to nonlubricated couplings, torsional damping couplings, torquemeter couplings, and more."

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Extra info for Coupling and Joints [design, selection, application]

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The pctrochcmical industry. utilities, machinery, and so on. Most of these couplin,(7s are considered “off the shclf” or modificalions of them. 3. ” 111. ” Couplings for operations under 100 lip are classified as small. Those between 100 and 1000 hp are classified a s medium: Usually those over 1000 hp are considered critical t o the operation of the equipment: these are covered in Section IV, Special-Purpose Couplings. 13 Miniature metallic beam coupling. 14 Miniature disc coupling. g.. a pump) shuts down, it usually does not affect the plant operation.

These couplings obtain their flexibility from the looseness (backlash) between the mating teeth. Gear couplings are used for medium-sized and large equipment applications and are probably the most power-dense type of couplings available. They require periodic lubrication, every 1-2 years, depending on the work duty and type of lubrication. 16 Straight tooth gear coupling. 17 Crowned tooth gear coupling. ) tained (good lubrication and reasonable alignment), gear couplings have a service life of 3-5 years, in many cases 5-10 years.

The couplings are very flexible and require very simple alignment techniques, calipers, scales, and perhaps, if one gets sophisticated, a dial indicator. 15 Miniature metallic bellows coupling. ) of the flexible element, and usually little or no damage occurs to other components. A few examples of these types of couplings on the market are grid, disc, and elastomeric. Also found on this type of equipment are small gear couplings, some of which have the outer sleeve made of nylon or plastic and therefore require no lubrication.

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