A 2-stage gearbox composed of spur gears is shown in the figure. 75mm 75mm OUT a)...
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A 2-stage gearbox composed of spur gears is shown in the figure. 75mm 75mm OUT a) (10%) The electric motor shown is of 15 kW and rotates at a speed of 800 rpm. 14 is selected for the number of teeth of pinion 1 to have a compact system and, at the same time, to avoid interference and gear 2 has 50 teeth. Pinion 3 and gear 4 are identical to 1 and 2. If the transmission efficiency between any two gears is 0.96, what are the output speed, output torque and direction of rotation? b) (10%) If the module of the gears are 5 mm, what is the tangetial force that rotates gear 2 and the radial force that is exerted by pinion 1 on the shaft carrying gear 2. What about the forces between pinion 3 and gear 4? c) (20%) What is the corresponding factor of safety for the most critical gear mesh according to contact stress analysis? Material used is steel hardened to 400BHN & tempered and face width is selected as 10 times module? What would you suggest according to your result? (Use the basic gear design equation against contact stress without AGMA correction factors.) d) (30%) What is the corresponding factor of safety against tooth bending? (Use AGMA equations in your analysis and assume mostly ideal values for the correction factors required.) A 2-stage gearbox composed of spur gears is shown in the figure. 75mm 75mm OUT a) (10%) The electric motor shown is of 15 kW and rotates at a speed of 800 rpm. 14 is selected for the number of teeth of pinion 1 to have a compact system and, at the same time, to avoid interference and gear 2 has 50 teeth. Pinion 3 and gear 4 are identical to 1 and 2. If the transmission efficiency between any two gears is 0.96, what are the output speed, output torque and direction of rotation? b) (10%) If the module of the gears are 5 mm, what is the tangetial force that rotates gear 2 and the radial force that is exerted by pinion 1 on the shaft carrying gear 2. What about the forces between pinion 3 and gear 4? c) (20%) What is the corresponding factor of safety for the most critical gear mesh according to contact stress analysis? Material used is steel hardened to 400BHN & tempered and face width is selected as 10 times module? What would you suggest according to your result? (Use the basic gear design equation against contact stress without AGMA correction factors.) d) (30%) What is the corresponding factor of safety against tooth bending? (Use AGMA equations in your analysis and assume mostly ideal values for the correction factors required.)
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a Given Input speed So As Gear 2 and Gear 3 is on same shaft Again If Outp... View the full answer
Related Book For
Machine Elements In Mechanical Design
ISBN: 9780134441184
6th Edition
Authors: Robert Mott, Edward Vavrek, Jyhwen Wang
Posted Date:
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