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 17, Problem 15P
To determine
The design of a friction belt drive.
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A fan is driven by a belt from a motor which runs at 880 rpm. A medium double ply leather belt 5/16 inches thick and 10 inches wide is used. The diameters of the motor pulley and the driven pulley are 14 inches and 54 inches, respectively. The center distance is 54 inches and both pulleys are made of cast iron. Coefficient of friction of leather on cast iron is 0.35. The allowable stress of the belt is 350 psi and the belt weighs 0.035 lb/in^3. What is the horsepower capacity of the belt?
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1.0 applies. Determine the number of D360 V-belts needed, calculate the factor of safety, and estimate the life in hours.
The number of D360 V-belts needed is
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A multiple V-belt drive is required to transmit 4 kW. The smaller pulley of the system is150 mm diameter, rotates at 200 rev/min, and has an angle of lap angle of 135°. Thegrove angle is 40° and the coefficient of friction between the belt and the pulleys is 0·3.If the maximum tension in any one belt is limited to 800 N, calculate:(a) The number of belts required. (b) The minimum tension in any one belt. (c) The required pre-tensioning of the belt. The centre-to-centre distance between the pulleys is 2 m.(d) Determine to the nearest mm, the required size for the larger pulley.(e) Find the approximate length of the belt
Chapter 17 Solutions
Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
Ch. 17 - Example 17-2 resulted in selection of a 10-in-wide...Ch. 17 - A 6-in-widc polyamide F-l flat belt is used to...Ch. 17 - Prob. 3PCh. 17 - A flat-belt drive is to consist of two...Ch. 17 - In solving problems and examining examples, you...Ch. 17 - Return to Ex. 17-1 and complete the following. (a)...Ch. 17 - Prob. 7PCh. 17 - Prob. 8PCh. 17 - Prob. 9PCh. 17 - Two shafts 20 ft apart, with axes in the same...
Ch. 17 - Prob. 11PCh. 17 - Prob. 12PCh. 17 - A designer has to select a metal-belt drive to...Ch. 17 - Prob. 14PCh. 17 - Prob. 15PCh. 17 - Prob. 16PCh. 17 - Prob. 17PCh. 17 - Two B85 V belts are used in a drive composed of a...Ch. 17 - Prob. 19PCh. 17 - Prob. 20PCh. 17 - The geometric implications of a V-flat drive are...Ch. 17 - A 2-hp electric motor running at 1720 rev/min is...Ch. 17 - The standard roller-chain number indicates the...Ch. 17 - Prob. 24PCh. 17 - A double-strand no. 60 roller chain is used to...Ch. 17 - A four-strand no. 40 roller chain transmits power...Ch. 17 - Prob. 27PCh. 17 - Prob. 28PCh. 17 - Prob. 29PCh. 17 - Prob. 30PCh. 17 - Prob. 31PCh. 17 - Prob. 32PCh. 17 - Prob. 33PCh. 17 - For Prob. 17-29 estimate the elongation of the...
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- A power screw assembly with single acme threads is to be used to raise a load of 3000 lbf at an axial displacement rate of 2.5 in/s. The steel screw has a nominal diameter of 2 inches and its threads are oil lubricated. The screw is paired with a bronze nut; axial support is provided by a thrust collar with a bronze thrust washer that is secured to the frame. The mean radius of the collar is 1.1 inches. A gear motor is utilized to drive the power screw assembly. a. What is the minimum power requirement for the motor? b. Do you expect the power screw assembly to be self-locking? c. Calculate the efficiency of the screw assembly.arrow_forwardPlease answer ASAP. I will rate helpful.arrow_forwardA flat belt drive used to transmit power from a motor running at 1600 m/min to a machine. The belt has 6.5mm thickness and 140mm width with a mass of 0.9kg/m length. The angle of lap in the driver pulley is 165 and the coefficient of friction between the belt and pulley is 0.35. If the ultimate strength of the belt material is 23MPa, calculate the maximum power transmitted if the factor of safety is 10.arrow_forward
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