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Velocity Ratio and Centre Distance Assignment Help

Assignment Help: >> Helical and Spiral Gears - Velocity Ratio and Centre Distance

Velocity Ratio and Centre Distance:

Spiral gears contain different helix angles say ψ1 and ψ2.

Normal pitch line velocity, Vn  = V1  cos ψ1 = V2  cos ψ2

 ∴1950_Velocity Ratio and Centre Distance.png

Velocity Ratio (VR) =

1319_Velocity Ratio and Centre Distance1.png

 

here d1 and d2 are pitch circle diameters.

331_Velocity Ratio and Centre Distance2.png

= t1/ t2                       . . . (9.9)

The minimum centre distance among two skew shaft axes

1727_Velocity Ratio and Centre Distance3.png          . . . (9.10)

For parallel shaft axes, ψ1 = ψ2 = ψ

∴ 1714_Velocity Ratio and Centre Distance4.png
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