A pair of enclosed spur gears have z1 =20, z2 =80, m = 3 mm and...
A pair of enclosed spur gears have z1 =20, z2 =80, m =
3 mm and face width factor of ?d =1.0. The pinion rotates at n1
=970 rpm. The allowable contact stress of
the pinion and gear are [?H1] = 700 MPa, [?H2] = 500 MPa,
respectively. The load
factor is K =1.5, zone factor is ZH =2.5, elastic coefficient is ZE
=189.8 MPa1/2.
Determine the power that can be transmitted by tooth surface
contact strength
analysis.
Homework Answers
in that question we design
according to gear failure because it have less strenght.
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Two 20° involute full depth spur gears are used to transmit the power and speeds shown. The material for both pinion and gear is specified as through-hardened steel tempered to 300 BHN surface hardness. Both pinion and gear are precision cut for "very accurate" gearing. For a factor of safety of 2 and assuming a diametral pitch, Prof 9, specify face widths of the pinion and gear using only the AGMA bending fatigue analysis. State all assumptions used to determine...
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if need any more information please ask !!!
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7) [30 pts] Factor of Safety for Contact Stress A steel spur pinion has 16 teeth cut on the 20 full-depth system with a module of 8 mm and a face width of 90 mm. The pinion rotates at 150 rev/min and transmits 3 kW to the mating steel gear. This pinion is to mesh with a steel gear with a gear ratio of 4:1. The Brinell hardness of the teeth is 200, and the tangential load transmitted by the...
The accessory drive unit of a large aircraft engine involves an identical pair of 200 full-depth spur gears. The gears have 70 teeth and rotate together at 8000 rpm. The diametral pitch is 12 and the face width 1.0 in. The gears are made of alloy steel, case-hardened to 62RC (680 Bhn). Although the case extends throughout the fillet, it is conservatively decided to use the core hardness of 500 Bhn for calculating fatigue strengths. The tooth profiles are finished...
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Two 20° involute full depth spur gears are used to transmit the power and speeds shown. The material for both pinion and gear is specified as through-hardened steel tempered to 300 BHN surface hardness. Both pinion and gear are precision cut for "very accurate" gearing. For a factor of safety of 2 and assuming a diametral pitch, Prof 9, specify face widths of the pinion and gear using only the AGMA bending fatigue analysis. State all assumptions used to determine...
power = 3 kW
if need any more information please ask !!!
You are the designer and you have been asked to design a speed reducer (gearbox) that will take power from the shaft of an electric motor rotating at 1500 rpm and deliver it to a machine that is to operate at approximately at 200 rpm Assume that you have decided to use spur gears to transmit the power [A power equal to the last one digits of your...
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