By Jon R. Mancuso
"Second version offers new fabric on coupling rankings, normal objective couplings as opposed to certain function couplings, retrofitting of lubricated couplings to nonlubricated couplings, torsional damping couplings, torquemeter couplings, and more."
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Extra info for Couplings and Joints: Design, Selection & Application (Dekker Mechanical Engineering)
G.. a pump) shuts down, it usually does not affect the plant operation. This equipment uses a coupling with a flexible element that can be easily inspected and replaced and is therefore often considered a throwaway. 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.
The Jexible elements see only angular and axial alignment or misalignment. Therefore equipment needs a coupling with more than one flexible element to accommodate offset, the exception being some elastomeric element couplings that can accommodate both parallel and angular misalignments. C. Accommodate End Movement Most flexible couplings are designed to accommodate axial movement of the equipment to shaft ends. 3 Types of misalignment. (A) Parallel offset misalignment. (B) Angular misalignment.
19 Chain coupling-nylon. 2 1). Grid couplings do not transmit as much power (for per the same outside diameter) as gear couplings but are usually less costly. Grid couplings are used for medium-sized and small equipment. 4. U-Joints U-joints are used in many general-purpose applications. 22). There are several types used here. Rear wheel drives use the “pin-and-yoke’’ type. 23) to accommodate large misalignments; these do not rotate, but they do transmit power and accommodate misalignment. 24) are used in the paper and steel industries.