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Design a pair of helical gears to transmit a power of 36800 Watts at 30 rps of the pinion. Gear ratio is 4. Helical angle is $15^0$.Teeth is $20^0$ full depth. Material used is C50.
written 7.3 years ago by gravatar for teamques10 teamques10 ★ 65k •   modified 7.3 years ago

Mumbai University > Mechanical Engineering > Sem 7 > Machine Design 2

Marks: 10M

Year: Dec 2016
machine design
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written 7.3 years ago by gravatar for teamques10 teamques10 ★ 65k

Given

P = 36800

N = 30 x 60 = 1800 rpm

i = 4

$\beta = 15^0$

$\alpha = 20^0$

Material C50

Solution

Design bending stress

$[\sigma_b] = \frac{1.4K_{b1}}{nk_{\sigma}} \sigma_{-1}$

For C50

$\sigma_u = 700 N/mm^2 \\ \sigma_y = 380 N/mm^2$ B4N = 241

$\sigma_{-1} = 0.22 (\sigma_u + …

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