Q2/ A dry single plate clutch is to be designed for an automotive vehicle whose engine is rated to give 100 kW at 2400 r.p.m. and maximum torque 500 N-m. The outer radius of the friction plate is 25% more than the inner radius. The intensity of pressure between the plate is not to exceed 0.07 N/mm?. The coefficient of friction may be assumed equal to 0.3. The helical springs required by this clutch to provide axial force necessary to engage the clutch are eight. If each spring has stiffness equal to 40 N/mm, determine the dimensions of the friction plate and initial compression in the springs

Q2/ A dry single plate clutch is to be designed for an automotive vehicle whose engine is rated to give 100 kW at 2400 r.p.m. and maximum torque 500 N-m. The outer radius of the friction plate is 25% more than the inner radius. The intensity of pressure between the plate is not to exceed 0.07 N/mm?. The coefficient of friction may be assumed equal to 0.3. The helical springs required by this clutch to provide axial force necessary to engage the clutch are eight. If each spring has stiffness equal to 40 N/mm, determine the dimensions of the friction plate and initial compression in the springs

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.76P: The clutch described in Prob. 7.75 is to transmit a torque of 120lbft when the total spring force...

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Q2/ A dry single plate clutch is to be designed for an autontotive vehicle whase engine is ated to give 100 &W at 2400 r.p.M. and marimum torque 500 N-m. The outer radus of the friction plate is 25% ore than the inner radius, The intensity of pressure berween the plate is not to exceed 0.07 N/mm. The coefficient of friction may be assamed egual t0 0.3 The helical springs reguired by this cluich to provide axial force mecessary to engage the clutch are eight. If cach spring has stiffness equal to 40 N/mm, derermine the dimensions of the friction plate and initial compression in the springs
A multi-plate clutch must transmit 11 kW of power without slipping at 1500 rev/min. The coefficient of friction is 0.3. The inner and outer radis are 30 and 85 mm respectively. The axial force applied to the plates is 780 N. Determine the number of plates required using.
A A multiple disc clutch transmits 55 kW of power at 1800 r.p.m. The coefficient of friction is 0.1 and the axial intensity of pressure is not to exceed 160 kN/m. The internal radius is 80 mm and is 0.7 times the external radius. Find the number of plates needed to transmit the required torque.
Example: An automotive single-plate clutch with twe of friction Surfaces, transmits a 300 N-m to- pairs rque at 1500 rp.m. The inner and outer diameters of the friction disck are 170 and 270 mm The cofficient of friction is 0-35. The normal for- ce on the friction Surfaces is exerted by nine helical Compre ssion springs, so that the clutch is always engia- ged. The clutch is dis engaged when the external force Further Compresses (5) and the number of ac Five Coile are (6) The are made of patented and Cold-drawn steel respectively. the springs. The spring index is Springs wires of minimum tensile Stmength (MTS) (N/mm?)as Wive dia. 1 1-21-4 1.6 1-8 2 2.53 3.6445567 MTS, 1900 i2601817e0175017201640 1570 I510 1480 440 139013201260 NI mr The permissible shear stress for the wire is 30%. of the ultimate tensile strength, and (G-81370 Nimn). Design the springs and specily their dimensisns. Use this relatian to obtaine to the total normal fore required to transmit the torque. F= 4T where Dis…
2 (b) A multi-plate clutch has four pairs of frictional surfaces, each of internal diameter 120 mm and external diameter 200 mm. If the coefficient of friction is 0.3 and the uniform pressure condition can be assumed, what is the required spring force when the plates transmit 20 kW at 1400 rpm?
H.W (3): A multi-disc clutch has three discs on the driving shaft and two on the driven shaft. The outside diameter of the contact surfaces is 240 mm and inside diameter 120 mm. Assuming uniform wear and coefficient of friction as 0.3, find the maximum axial intensity of pressure between the discs for transmitting 25 kW at 1575 r.p.m. Ans. : p = 0.062 N/mm2
Q2) A multi-plate clutch as in the figure below transmits power at 1500 rpm. The coefficient of friction is 0.4 the inner and outer diameters are 30 and 150 mm respectively. The axial force applied to the plate is 400N. Calculate the torque and power that can be transmitted without slipping using the uniform pressure theory, (03)
4) In a single plate clutch both sides are effective. The clutch transmits 10 Kw power. The maximum torque is 120 Nm, the maximum axial force should not be more that 100 KN/m2. The outer diameter of the clutch plate is 1.3 times of the inner diameter. Find out the axial load exerted by the spring and outer and inner diameters of the clutch plate.
H.W (1): A single dry plate clutch transmits 7.5 kW at 900 r.p.m. The axial pressure is limited to 0.07 N/mm:. If the coefficient of friction is 0.25, find 1. Mean radius and face width of the friction lining assuming the ratio of the mean radius to the face width as 4, and 2. Outer and inner radii of the clutch plate. Ans.: R = 113 mm , rl = 127.125 mm ; and 12 = 98.875
An multi axial plate clutch used in injection molding machine consist of a three pairs of contact surfaces for engaging and disengaging power from the engine. The engine used for power has a maximum torque capacity of 120 N-m and is transmitted to machine without losses. The permissible intensity of pressure is 350 kPa and the coefficient of friction is 0.35 for the clutch system used in the machine. It was determined that the machine will operate on maximum capacity of torque if the ratio of inner diameter to outside diameter of the axial clutch is 0.577. Assuming uniform wear theory, calculate the inner and outer diameters of the friction lining.
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A multiple disc clutch has three discs on the driving shaft and two on the driven shaft, providing four pairs of contact surfaces. The outer diameter of the contact surfaces is 250 mm and the inner diameter is 150 mm. Determine the maximum axial intensity of pressure between the discs for transmitting 18.75 kW at 500 r.p.m. Assume uniform wear and coefficient of friction as 0.3.