Q8 A multi-disk clutch consists of two steel disks with one bronze disk. The inner and outer diameters ofthe contacting surfaces are 200 and 250 mm respectively. The coeffi cient of friction is 0.1 and themaximum pressure between the contacting surfaces is limited to 0.4 N/mm. Assuming uniform weartheory, calculate the required force to engage the clutch and the power transmitting capacity at 720rpm. Q8 A multi-disk clutch consists of two steel disks with one bronze disk. The inner and outer diameters ofthe contacting surfaces are 200 and 250 mm respectively. The coeffi cient of friction is 0.1 and themaximum pressure between the contacting surfaces is limited to 0.4 N/mm?. Assuming uniform weartheory, calculate the required force to engage the clutch and the power transmitting capacity at 720rpm.(12 marks)

For uniform wear theory, Pmax=CRi where, C is the constant Pmax is the maximum pressure on the…

A multi-disk clutch consists of two steel disks with one bronze disk. The inner and outer diameters of the contacting surfaces are 200 and 250 mm respectively. The coeffi cient of friction is 0.1 and the maximum pressure between the contacting surfaces is limited to 0.4 N/mm. Assuming uniform wear theory, calculate the required force to engage the clutch and the power transmitting capacity at 720 rpm.

A multi-disk clutch consists of two steel disks with one bronze disk. The inner and outer diameters of the contacting surfaces are 200 and 250 mm respectively. The coeffi cient of friction is 0.1 and the maximum pressure between the contacting surfaces is limited to 0.4 N/mm. Assuming uniform wear theory, calculate the required force to engage the clutch and the power transmitting capacity at 720 rpm.

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...

See similar textbooks

Similar questions

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.
Q1/ A plate clutch having a single driving plate with contact surfaces on each side is required to transmit 110 kW at 1250 r.p.m. The outer diameter of the contact surfaces is to be 300 mm. The coefficient of friction is 0.4. (a) Assuming a uniform pressure of 0.17 N/mm? ; determine the inner diameter of the friction surfaces. (b) Assuming the same dimensions and the same total axial thrust, determine the maximum torque that can be transmitted and the maximum intensity of pressure when uniform wear conditions have been reach.
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…
A multiplate disc clutch transmits 55 kilowatt of power at 1800 rpm. Coefficient of friction for the friction surface is 0.1. Axial intensity of pressure is not to exceed 160 KN/m2. The internal radius is 80mm and is 0.7 times external radius. Find the number of plates needed to transmit the required torque.
Q. A multiplate clutch has three pairs of contact surfaces. The outer and inner radii of the contact surfaces are 100 mm and 50 mm respectively. The maximum axial spring force is limited to 1 kN. If the coefficients of friction is 0.35 and assuming uniform wear, find the power transmitted by the clutch at 1500 r.p.m.
Q. A multi disc clutch has 5 plates having four pairs Myd of active friction surfaces. If the intensity of pressure is not to exceed 127 kN/m?, find the power in kW transmitted at 500 r.p.m, if the outer and inner radii of friction surfaces are 125 mm and 75 mm respectively. Assume uniform wear and take coefficient of friction as 0.3.
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)
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 multiple disc clutch has radial width of the friction material as 1/5th of the maximum radius. The coefficient of friction is 0.25. Find the total number of discs required to transmit 60 kW at 3000 r.p.m. The maximum diameter of the clutch is 250 mm and the axial force is limited to 600 N. Also find the mean unit pressure on each contact surface.
A multiplate clutch has three pairs of contact surfaces. The outer and inner radii of the contact surfaces are 100 mm and 50 mm respectively. The maximum axial spring force is limited to 1 kN. If the coefficient of friction is 0.35 and assuming uniform wear, find the power transmitted by the clutch at 1500 r.p.m.
An automotive-type clutch, as shown in Figure 18.2, has inside and outside diameters of 160 and 240 mm, respectively. Clamping force is provided by nine springs,each compressed 5 mm to give a force of 900 N when the clutch is new. The moldedfriction material provides a conservatively estimated coefficient of friction of 0.40when in contact with the flywheel and pressure plate. Maximum engine torque is280 N # m.(a) What is the safety factor with respect to slippage of a brand new clutch?(b) What is the safety factor after “initial wear” has occurred?(c) How much wear of the friction material can take place before the clutch will slip (assuming no change in coefficient of friction)?
Example: An automotive single-plate clutch ,with two of friction Surfaces, transmits a 300 N-mto- pairs rque at 1500 rip.m. The inner and outer diameters of the friction disck are 170 and 270 mm The cofficient of friction is o.35. The normat for- ce on the frichion Surfaces is exerted by nine helical Compre ssion springs, so that the clutch is a lways engia- ged. The clutch is dis engaged when the external force Further Compresses the (5) and the number of active Coile are (6). The Springs are madeof patented and cold -drawn steel wires of minimum tensile Strength (MTS) (N/mm²) as respectively. springs. The spring Lindex is Wire dia. 1 d(mm) 1.21.4 1.6 1.8 2 2.5 3 3.6 44.55 67 IMIm?1900 |1360|182|1480175011구20116401157이 1510|1480|144011390132011260 MTS permissible shear stress for the of the ultimate tensile strength, and (G-81370 Nlmné). Design the springs and specily their dimensiuns. Use this relation to obtaine to the total normal force required to transmit the torque. F Dis outer…