CLUTCH
1. A cone clutch transmits 24kW at 490rpm. 5. Find number of contacting surfaces for a
The coefficient of friction is 0.2 and allowable multi disk clutch plate transmitting torque of
intensity of pressure is 0.35N/mm. The semi 10N-m and inner and outer diameters of
cone angle is 12. The outer diameter is fixed friction lining are 70mm and 100mm
as 310mm.Assuming uniform wear theory; respectively. The operating force is of
find the maximum torque which is magnitude 305N and coefficient of friction is
transmitted. 0.2.
1060 4
Solution: = Solution: = (+)
2
241060 4(10)
= =
2(490) . 2(305)(. 10 + .07)
= 467.72
= 3.86 4
2. A cone clutch transmits 24kW at 490rpm.
6. A plate clutch consists of 1 pair of contacting
The coefficient of friction is 0.2 and allowable
surfaces. The inner and outer diameter of the
intensity of pressure is 0.35N/mm. The semi
friction disk is 100mm and 200mm
cone angle is 12. The outer diameter is fixed respectively. The coefficient of friction is 0.2
as 310mm.Assuming uniform wear theory; and permissible intensity of pressure is
find the inner diameter.
1.5N/mm. Assuming uniform wear theory,
( 2 2 ) calculate the operating force in the clutch.
Solution: = 8
Solution: = ()
2
(24)(. 35)()(. 3102 2 )
467.72 =
8(12) 1.5(100)(200 100)
=
2
= 300
= 23561.94
3. A cone clutch transmits 24kW at 490rpm.
The coefficient of friction is 0.2 and allowable 7. A plate clutch consists of 1 pair of contacting
intensity of pressure is 0.35N/mm. The semi surfaces. The inner and outer diameter of the
cone angle is 12. The outer diameter is fixed friction disk is 100mm and 200mm
as 310mm.Assuming uniform wear theory; respectively. The coefficient of friction is 0.2
find the face width of friction lining. and permissible intensity of pressure is
1.5N/mm. Assuming uniform wear theory,
calculate the torque transmitting capacity of
Solution: = 2
2 the clutch.
310 300 () (+)
= 2 Solution: = =
2(12) 2 4
(1.5)(100)(200100) (.2)(23561.9)(.20+.10)
= 48.1 := 2
; =
4
4. A cone clutch transmits 24kW at 490rpm. = 23561.94 ; = 353.43
The coefficient of friction is 0.2 and allowable
intensity of pressure is 0.35N/mm. The semi 8. A plate clutch consists of 1 pair of contacting
cone angle is 12. The outer diameter is fixed surfaces. The inner and outer diameter of the
as 310mm.Assuming uniform wear theory; friction disk is 100mm and 200mm
calculate force required to engage clutch. respectively. The coefficient of friction is 0.2
and permissible intensity of pressure is
4
Solution: = (+) 1.5N/mm. Assuming uniform wear theory,
calculate the power transmitting capacity of
4(467.72)((20)) the clutch at 80rad/s.
=
. 35(0.310 + 0.3) Solution:. =
= 3241.5 = 353.43(80) = 28.27
9. If number of contacting surfaces are 5, then
number of disks required in multi disk clutch
Solution: = + 1
= 5 + 1
= 6
10. A clutch has outer and inner diameters 100
mm and 40 mm respectively. Assuming a
uniform pressure of 2MPa and coefficient of
friction of liner material is 0.4, the torque
carrying capacity of the clutch is.
(+)
Solution: = 7
4
0.4(2)(100+40)
= 7
4
= 196
