Transcription of Md-17 Shaft Design
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Md-17 Shaft Design
1 August 15, 2007 August 15, 2007111717.. Shaft DesignShaft DesignObjectivesObjectives Compute forces acting on shafts from gears, pulleys, and Compute forces acting on shafts from gears, pulleys, and Find bending moments from gears, pulleys, or sprockets that Find bending moments from gears, pulleys, or sprockets that are transmitting loads to or from other transmitting loads to or from other devices. Determine torque in shafts from gears, pulleys, sprockets, Determine torque in shafts from gears, pulleys, sprockets, clutches, and , and couplings. Compare combined stresses to suitable allowable stresses, Compare combined stresses to suitable allowable stresses, including any required stress reduction factors such as stress including any required stress reduction factors such as stress concentration factors and factors of factors and factors of safety.
Loads from Worm gears August 15, 2007 16 Loads from Worm gears Axial force on the worm gear where λ= lead angle ϕ= normal pressure angle f = coefficient of friction ⎟⎟ ⎠ ⎞ ⎜⎜ ⎝ ⎛ + = cosφcosλ- f sinλ cosφsinλ f cosλ Fa(gear) Ft(gear) August 15, 2007 17 Loads from Belts and Chains For a belt, Total load, Ft = Ff + Fb Net ...
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