Question
Download Solution PDFThe Polygon effect is observed in ______ (Choose the correct option)
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
- Chain drives are used for transmission of motion at a constant velocity ratio without creep and slippage.
- Chains are used in conjunction with sprocket pinions and sprocket wheels.
- Chains and sprockets are available in both British and metric standards.
- The sprockets are generally keyed to the shafts.
Polygon Effect
- The chain passes around the sprocket as a series of chordal links.
- This action is similar to that of a non-slipping belt wrapped around a rotating polygon.
- The chordal action is illustrated in the figure, where the sprocket has only four teeth.
- It is assumed that the sprocket is rotating at a constant speed of N rpm.
- In figure the chain-link AB is at a distance of D/2 from the center of the sprocket wheel and its linear velocity is,
\(V_{max}=\frac{\pi DN}{60\times10^3}~m/s\)
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