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The single-plate clutch transmits the torque C from the input shaft on the left to the output shaft on the right. Compression springs between the clutch housing and the pressure plate provide the necessary pressure on the friction surface. The splines prevent the clutch plate from rotating relative to the output shaft. If
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Chapter 7 Solutions
International Edition---engineering Mechanics: Statics, 4th Edition
- A multiple disc clutch is used to operate the speed regulating gears of lathe. If the torque delivered by the clutch is 400 lbs. in.,evaluate the number of discs are necessary and the max. force acting on them while the clutch is in operation. Limit the disc friction surface sizes between 5 in. adn 3 in. Take the factor of safety as 2 , coefficient of friction varies from 0.150 to 0.200, and the pressure as (100-24/100) psi.arrow_forwardA cone clutch with a cone angle of 12° transmits 53 kW at 1300 rpm. The coefficient of friction of linings is 0.16. Determine the axial spring force necessary to engage the clutch in N if the mean diameter of the active conical sections is 250 mm.arrow_forward4. A friction clutch is required to transmit 34-5 kW at 2000 rev/min. It is to be of single-plate disc type with both sides of the plate effective, the pressure being applied axially by means of springs and limited to 70 kN/m². Ifthe outer diameter of the plate is to be 300 mm, find the required inner diameter of the clutch ring and the total force exerted by the springs. Assume the wear to be uniform. µ = 0-3. (U. Lond.) (Answer: 200 mm; 2-2 kN)arrow_forward
- The figure below shows the essential parts of a hydraulic brake system. The area of the piston in the master cylinder is 1.8 cm² and that of the piston in the brake cylinder is 6.4 cm2. The coefficient of friction between shoe and wheel drum is 0.50. If the wheel has a radius of 37 cm, determine the frictional torque about the axle when a force of 50 N is exerted on the brake pedal. N. m Wheel drum Pedal Shoe Master cylinder cylinder Brakearrow_forward3. The pulley has a radius of 3". And fits loosely on the 0.5" diameter shaft. If the loadings acting on the belt cause the pulley to rotate with constant angular velocity, determine the frictional force between the shaft and the pulley and compute the coefficient of kinetic friction. The pulley weighs 18lbs 3 in. 5 lb 5.5 lbarrow_forwardDont copy from chegg The disc brakes at the front of a car have pistons of 1582 mm2 cross-sectional area each, whereas the drum brakes at each of the rear wheels have pistons of 300 mm2cross-sectional area. The master cylinder has piston of 582 mm2 cross-sectional area.Determine the total force applied at the front and rear brake cylinders and the ratio inarrow_forward
- For the same question, the Impeller hub will be pressed onto the taper shaft with the Nut. How much FORCE should the nut create for this? Also, if the nut loosens and falls off, calculate whether the connection will be DISCONNECTED by itself. (Do not take the values from the previous question, use the values given in this question!) Engine power P=27 kW, RPM n=1684 rpm, Connection MEDIUM vibrating, Conical inclination angle α=1, Coefficient of Friction μ=0.3 , Average of the conical part diameter d=24 mm, connection width b=96 mmarrow_forward+ Frictional Forces on Flat Belts When engineers design belt drives and band brakes, they engineer them to withstand the frictional forces that develop between the belts or bands and their contacting surfaces. These frictional forces lead to tensions on each side of the contacting surfaces that are unequal; the segment aligning with the motion of the belt or band has a greater tension. Figure B 0.500 m 0.200 m -0.400 m- A 3 of 3 0.300 m Part C mc= Block A has a mass of mA = 49.0 kg and rests on a flat surface. (Figure 3)The coefficient of static friction between the block and the surface is A = 0.300. The coefficient of static friction between the rope and the fixed peg B is 0.320. The width of the block is d = 0.250 m. Find the greatest mass, mc, that weight C can have such that block A does not move. Express your answer numerically in kilograms to three significant figures. ▸ View Available Hint(s) Submit Drouide Foodbook VAZO I vec ? 1 of 3 kg > Reviewarrow_forward5. A plate clutch consists of a flat driven plate gripped between a driving plate and presser plate so that there are two active driving surfaces, cach having an inner diameter 200 mm and an outer diameter 350 mm. µ = 0-4. The working pressure is limited to 170 kN/m2. Assuming the pressure is uniform, calculate the power which can be transmitted at 1000 rev/min. If the clutch becomes worn so that the intensity of pressure is inverscly proportional to the radius, the total axial force on the presser plate remaining unaltered, calculate the power which can now be transmitted at 1000 rev/min and the greatest intensity of pressure on the friction surfaces. (U. Lond.) (Answer: 130kW; 127kW; 234 kN/m²)arrow_forward
- The band brake of Fig. is used to control the rotation of a drum. The coefficient of friction between the belt and the 36° V-pulley is 0.15, and the weight of the han- dle is 15 N. If a force of 200 N is applied to the end of the handle, determine the maximum torque for which no mo- tion occurs if the torque is applied Clockwise. 150 mm T 200 N 60 150 mm -675 mm 75 mmarrow_forwardPlease, reaply as soon as posible! Static Problem The band brake shown controls the rotation of the drum. The coefficient of friction between the belt and the drum is 0.25. The weight of the lever is negligible.Determine the force P that must be applied at the end of the braking lever to resist a torque T = 200 lb in, if the torque is applied in the: a) Clockwise b) Counterclockwise direction.arrow_forwardThe pivot bearing is subjected to a parabolic pressure distribution at its surface of contact. If the coefficient of static friction is μk, determine the torque M required to overcome friction and turn the shaft if it supports an axial force P.arrow_forward
- International Edition---engineering Mechanics: St...Mechanical EngineeringISBN:9781305501607Author:Andrew Pytel And Jaan KiusalaasPublisher:CENGAGE L