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 16, Problem 23P
To determine
The coefficient of speed fluctuation and width of the rim.
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A horizontal cross compound steam engine develops 500 kW at 100 rpm. The coefficient of fluctuation of energy as found from the turning moment diagram is to be 0.1 and the fluctuation of speed is to be kept within ± 0.5% of the mean speed. Find the mass of the flywheel required, if the radius of gyration is 3 meters.
An engine develops 200 kW of power at a mean speed of 75 rpm. The coefficient of energy fluctuation is 0.15 and speed fluctuates within ±3% of the mean speed. Find the moment of inertia of the flywheel that must attached to the crankshaft of the engine in order to maintain the speedwithin the acceptable range.
A spur pinion of pitch diameter 50 mm rotates at 200 rad/s and transmits 3 kW power. The pressure angle of the tooth of the pinion is 20° Assuming that only one pair of the teeth is in contact the total force (in Newton) exerted by a tooth of the pinion on the tooth on a mating gear is...
Chapter 16 Solutions
Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
Ch. 16 - The figure shows an internal rim-type brake having...Ch. 16 - For the brake in Prob. 16-1, consider the pin and...Ch. 16 - In the Figure for Prob. 16-1, the inside rim...Ch. 16 - The figure shows a 400-mm-diameter brake drum with...Ch. 16 - The block-type hand brake shown in the figure has...Ch. 16 - Suppose the standard deviation of the coefficient...Ch. 16 - The brake shown in the figure has a coefficient of...Ch. 16 - Prob. 8PCh. 16 - Prob. 9PCh. 16 - Prob. 10P
Ch. 16 - The maximum band interface pressure on the brake...Ch. 16 - The drum for the band brake in Prob. 1611 is 12 in...Ch. 16 - The brake shown in the figure has a coefficient of...Ch. 16 - The figure depicts a band brake whose drum rotates...Ch. 16 - The figure shows a band brake designed to prevent...Ch. 16 - A plate clutch has a single pair of mating...Ch. 16 - A hydraulically operated multidisk plate clutch...Ch. 16 - Prob. 18PCh. 16 - A cone clutch has D = 12 in, d = 11 in, a cone...Ch. 16 - Prob. 20PCh. 16 - A two-jaw clutch has the dimensions shown in the...Ch. 16 - Prob. 22PCh. 16 - Prob. 23PCh. 16 - Prob. 24PCh. 16 - Using the data of Table 16-6, find the mean output...Ch. 16 - When a motor armature inertia, a pinion inertia,...Ch. 16 - For the conditions of Prob. 1627, make a plot of...Ch. 16 - Prob. 29PCh. 16 - Prob. 30PCh. 16 - Prob. 31P
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- A spur pinion of pitch diameter 50 mm rotates at 200 rad/s and transmits 3 kW power. The pressure angle of the tooth of the pinion is 20°, what is the total force exerted by a tooth of the pinion on the tooth on a mating gear?arrow_forwardSuppose we have determined that the lowest natural frequency of a particular helical compression spring is 20286 rpm. According to the prescription in our book and according to the presentation in class, find the highest recommended operating frequency of a machine that utilizes this spring. Give your answer in rpm, but do not include units--Blackboard will not understandarrow_forwardpinion having 20 involute teeth of module pitch 6 mm rotates at 200 r.p.m. and transmits 1.5 kW to a gear wheel having 50 teeth. The addendum on both the wheels is 1/4 of the circular pitch. The angle of obliquity is 20°. Find (a) the length of the path of approach ; (b) the length of the arc of approach; (c) the normal force between the teeth at an instant where there is only pair of teeth in contact.arrow_forward
- There are two pairs of closed soft tooth surface spur gears A and B Parameters of A: modulus m = 2mm, number of teeth Z, = 40,Z, = 90, width of teeth b =60mm. %3D Parameters of B: modulus m = 4mm, number of teeth Z, = 20,Z, = 45, width of teeth b = 60mm. %3D The accuracy of the two pairs of gears is grade 8, and other conditions are the same. Try to compare the contact fatigue strength and bending fatigue strength of the two pairs of gears? And explain the reason?arrow_forwardA block brake with a torque of 250 N-m. Its drum rotates at 100 rpm. The length of the block (1) is twice its width (w). Assume, the coefficient of friction P is 0.35. Calculate: (1) the applied load (P) and the hinge-pin reaction (Rx ana Ry) for clockwise rotation of the drum; (2) the applied load and hinge-pin reaction for anticlockwise rotation of the drum; (3) the rate of heat generated during the braking action. (4) The dimensions of the block, if the intensity of pressure between the block and brake drum is 1 MPa. (5) Check whether the brake is self-locking.arrow_forwardA thin rod 5 mm diameter is held between two chucks 0.8 m apart and deflects 0.5 mm under its static weight. The rod weighs 1.508 N/m and the flexural stifness is 6.136N-m^2. Calculate the lowest critical speed in rpm taking into account the distributed mass.arrow_forward
- Two pulleys, one 650 mm diameter and the other 400 mm diameter, on parallel shafts 1.5 m apart are connected by a flat belt. Find the length of the belt required and the angle of contact between the belt and each pulley. What power can be transmitted by the belt when the larger pulley rotates at 1200 rev/min, if the maximum permissible tension in the belt is 10 kN, and the coefficient of friction between the belt and pulley is 0.05? give proper explaination and dont give handwritten solution.arrow_forwardConsider the unbalanced system given with mAeA=0.2L30okgm, mcec=0.3L90okgm,mEeE=0.4L105okgm.a) Find the dynamic bearing reaction vectors at B and D if the shaft rotates with 100 rpm.b) Find the correction values (kgm) and their orientations which must be attached to planes L and R in order to provide dynamic balancing.arrow_forwardA machine with a total mass of 2000 kg has a rotor with an out of balance force equivalent to 0.2 kg at 0.5 m radius rotating at 3000 rev/min. Calculate the stiffness and mass of an undamped vibration absorber which could be connected to the machine to eliminate transmission of force to the foundation at the operating speed, if the maximum deflection of the absorber spring is to be limited to 8 mm. [Ans 1234 kN/m, 12.5kg]arrow_forward
- In a single-stage gear wheel system with an evolvent profile, the rotating (driveThe number of teeth of the gear is Z1=10, the number of teeth of the rotated gear is Z2=20 and the modulus is m=5 mm; The rotating gear rotates clockwise. d) Prevent undercutting, if it exists on the same shape, by enlarging the grip angle. Calculate the value of the new grip angle and compare it with the new grip angle value you obtained from the drawing.arrow_forwardThe area of an indicator diagram taken off a four-cylinder, single-acting, four-stroke, internal combustion engine when running at 5.5 rev/s is 390 mm2, the length is 70mm and the scale of the indicator spring is 1mm = 1.6 bar. The diameter of the cylinder is 150mm and the stroke is 200mm. Calculate the indicated power of the engine assuming all cylinders develop equal power.arrow_forwardA multi plate friction clutch is used to transmit the power from the engine to a rotor which has a mass of 152 kg and a radius of gyration of 0.34 m. The inner and outer radius of the clutch disc is 0.055 m and 0.217 m respectively. The clutch plate has 4 contact surfaces (n = 4) and the axial thrust is 379 N. The flywheel of the engine rotates constantly at 1,106 rpm. Calculate the time required to accelerate the rotor from rest if the clutch is suddenly engaged. Take μ = 0.42. Assume uniform wear in clutch.arrow_forward
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