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-->//(Design against Static Load) Example 4.15
-->//Refer Fig.4.50 on page 121
-->//Safety valve blow-off pressure p (MPa)
-->p = 1.5
p =
1.5
-->//Effective diameter of the valve opening d (mm)
-->de = 50
de =
50.
-->//Distance between fulcrum and lever dead weights l1 (mm)
-->l1 = 1000
l1 =
1000.
-->//Distance between the fulcrum and the pin connecting the valve spindle to the lever l2 (mm)
-->l2 = 100
l2 =
100.
-->//Tensile yield strength of 30C8 Syt (N/mm2)
-->Syt = 400
Syt =
400.
-->//Factor of safety fs
-->fs = 5
fs =
5.
-->//Permissible bearing pressure at the pin in the lever Bp (N/mm2)
-->Bp = 25
Bp =
25.
-->//Ratio of width to thickness ratio
-->ratio = 3
ratio =
3.
The diamater of the pin(dp) = 11.000000 mm
The length of the pin(lp) = 20.000000 mm
The thickness of the lever cross-section(b) = 15.000000 mm
The width of the lever cross-sectio(d) = 45.000000 mm
The dead weight(P) = 294.524311 mm
The lever design is safe
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