Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
10th Edition
ISBN: 9780073398204
Author: Richard G Budynas, Keith J Nisbett
Publisher: McGraw-Hill Education
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Chapter 15, Problem 15P
15-15 to 15-22 As in Ex. 15-4, design a cylindrical worm-gear mesh to connect a squirrel-cage induction motor to a liquid agitator. The motor speed is 1125 rev/min, and the velocity ratio is to be 10:1. The output power requirement is 25 hp. The shaft axes are 90° to each other. An overload factor Ko (see Table 15-2) makes allowance for external dynamic excursions of load from the nominal or average load Wt. For this service Ko = 1.25 is appropriate. Additionally, a design factor nd of 1.1 is to be included to address other unquantifiable risks. For Probs. 15-15 to 15-17 use the AGMA method for
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design a spur gear drive for a motor running at 1500 rpm transmitting 15 kw power to a lower speed shaft with speed reduction ratio as 2.33:1. gears may bet aken as 20˚ full depth involute profile. Gear is made of grey cast Iron FG 200 and pinion of plain carbon steel 40C8. Assume starting torque to be 25% higher than the running torque.
The figure shows a 10 diametral pitch 18-tooth 20° straight bevel pinion driving a
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Problem 13-44
Dimensions in inches.
3
0
72
이
012441100
2
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4.803 lbf.
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Q1
Design a 4:1 spur-gear reduction for a 59 kW, three-phase squirrel-cage induction motor running at
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Chapter 15 Solutions
Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
Ch. 15 - An uncrowned straight-bevel pinion has 20 teeth, a...Ch. 15 - For the gearset and conditions of Prob. 15-1, find...Ch. 15 - An uncrowned straight-bevel pinion has 30 teeth, a...Ch. 15 - For the gearset and conditions of Prob. 15-3, find...Ch. 15 - An uncrowned straight-bevel pinion has 22 teeth, a...Ch. 15 - Prob. 6PCh. 15 - In straight-bevel gearing, there are some analogs...Ch. 15 - Refer to your solution to Probs. 15-1 and 15-2. If...Ch. 15 - Prob. 9PCh. 15 - Prob. 10P
Ch. 15 - Apply the relations of Prob. 15-7 to Ex. 15-1 and...Ch. 15 - Prob. 14PCh. 15 - 15-15 to 15-22 As in Ex. 15-4, design a...Ch. 15 - 15-15 to 1 5-22 As in Ex. 154, design a...Ch. 15 - 15-15 to 15-22 As in Ex. 15-4, design a...Ch. 15 - 15-15 to 15-22 As in Ex. 15-4, design a...Ch. 15 - 15-15 to 15-22 As in Ex. 15-4, design a...Ch. 15 - 15-15 to 15-22 As in Ex. 15-4, design a...Ch. 15 - 15-15 to 15-22 As in Ex. 15-4, design a...Ch. 15 - Prob. 22P
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- QI Two spur gears in a simple train shown in Figure Ql are having the same module, m = 2 and their respective number of teeth is NTa = 30 for the driver gear, and Nya = 45 for the driven gear. The inertia of the gear attached to the motor is L = 0.Dkgm² and the inertia of the second gear is la = 0.8kgm?. The second gear is connected to a pulley with the radius of 30 mm. The pulley is hoisting up the 2kg load with acceleration of a = 2 ms. Given the gear transmission efficiency is 90%. (a) Based on the module and number of teeth given, examine the pitch diameter of cach gear. (b) Considering acceleration of load at 2 ms-, evaluate the torque of the motor to overcome gears inertia. (c) Considering the 2 kg load, examine the torque required to accelerate the load through gear system. (d) Suggest the minimum torque of the motor to accelerate the 2 kg load at 2 ms. NTG = 45 r=30 mm NTm = 30 IG driver a = 2 ms² 2 kgarrow_forward14-21 A 20° spur pinion with 20 teeth and a module of 2.5 mm transmits 120 W to a 36-tooth gear. The pinion speed is 100 rev/min, and the gears are grade 1, 18-mm face width, through-hardened steel at 200 Brinell, uncrowned, manufactured to a No. 6 quality standard, and considered to be of open gearing quality installation. Find the AGMA bending and contact stresses and the corresponding factors of safety for a pinion life of 10° cycles and a reliability of 0.95.arrow_forwardA 20° 20-tooth cast-iron spur pinion having a module of 4 mm drives a 32-tooth cast-iron gear. Find the contact stress if the pinion speed is 1020 rev/min, the face width is 50 mm, and 10 kW of power is transmitted. Refer to table number 14-8 for elastic coefficient. The contact stress is MPa.arrow_forward
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