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-->//(Power Screws) Example 6.6
-->//Number of starts n
-->n = 1
n =
1.
-->//Nominal diameter of the screw d (mm)
-->d = 52
d =
52.
-->//Pitch of the screw p (mm)
-->p = 8
p =
8.
-->//Outer diameter of the friction collar Do (mm)
-->Do = 100
Do =
100.
-->//Inner diameter of the friction collar Di (mm)
-->Di = 60
Di =
60.
-->//Coefficient of friction for thread mu1
-->mu1 = 0.15
mu1 =
0.15
-->//Coefficient of friction for collar mu1
-->mu2 = 0.12
mu2 =
0.12
-->//Axial force to be exerted W (kN)
-->W = 2
W =
2.
-->//Lead screw rpm N
-->N = 30
N =
30.
-->//For ISO Metric Trapezoidal threads theta (degree)
-->theta = 15
theta =
15.
Power required to drive the lead screw(kW) = 0.061838 kW
Efficiency of the screw(eta) = 12.937099 percent
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