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-->//(Power Screws) Example 6.11
-->//Refer Fig.6.27 on page 215
-->//Force applied by operator P (N)
-->P = 100
P =
100.
-->//Mean radius R (mm)
-->R = 500
R =
500.
-->//Coefficient of friction (mu)
-->mu = 0.15
mu =
0.15
-->//Nominal diameter of the upper screw dUp (mm)
-->dUp = 50
dUp =
50.
-->//Pitch of the upper screw pUp (mm)
-->pUp = 12
pUp =
12.
-->//Nominal diameter of the lower screw dLow (mm)
-->dLow = 50
dLow =
50.
-->//Pitch of the upper screw pLow (mm)
-->pLow = 8
pLow =
8.
-->//Number of starts of both the screws n
-->n = 1
n =
1.
Load that can be raised(W) = 6722.752316 N
Efficiency of the screw jack(eta) = 8.559674 percent
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