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Clutches
Presented by
Pratyush ranjnan kar
M-tech manufacturing technology
Regd no.- 163510
Basic idea
 Clutches are useful devices with two rotating shafts
 It connects the driving shaft to a driven shaft, so th...
Types
Types of
Clutches
Positive
Clutch
Friction
Clutch
Plate Or
Disc Clutch
Single plate
clutch
Multiplate
Clutch
Cone Cl...
Positive Clutch/ dog clutch
 It couples two rotating shafts or other rotating
components not by friction but by interfere...
Friction clutches
Single plate clutch
Multiplate clutch
Centrifugal clutch
Driving
shaft
Driven
shaft
F=mrω
2
ω
ω
Cone clutch
Design and torque transmitted
Area of the ring on contacting surface
rrA  2
Axial load on the ring
rrpW  2
Fricti...
p = Constant
 
T R
R
r rprT
0
2
1
2
2 
rrpT
R
R
T
r   
1
2
2
0
2
Torque transmitted
 3
2
3
1
3
3
2
3
2
1
2
...
Uniform wear theory
 In this theory, we are considering that wear which take place is
uniform over the entire contacting ...
We know that, frictional torque acting on the ring is,
Torque transmitted by single plate clutch can be obtained by integr...
• Power transmitted by single plate clutch is given by,
Where, N = Speed of driving shaft
Watt
NT
P
TP
60
2
.




presentation on clutches
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presentation on clutches

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this presentation contains the basis of clutches used in machine tool.

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presentation on clutches

  1. 1. Clutches Presented by Pratyush ranjnan kar M-tech manufacturing technology Regd no.- 163510
  2. 2. Basic idea  Clutches are useful devices with two rotating shafts  It connects the driving shaft to a driven shaft, so that the driven shaft may be started or stopped at will, without stopping the driving shaft  In a drill,,one shaft is driven by a motor and the other is driving a drill chuck. The clutch connects the two shafts so that they can either be locked together and spin at the same speed, or be decoupled and spin at different speeds
  3. 3. Types Types of Clutches Positive Clutch Friction Clutch Plate Or Disc Clutch Single plate clutch Multiplate Clutch Cone Clutch Centrifugal Clutch
  4. 4. Positive Clutch/ dog clutch  It couples two rotating shafts or other rotating components not by friction but by interference.  It is Simple to construct, No heat generated , No slip, Compact ,Low cost.  But it Must be connected when shaft is unloaded.  Uses- power press and rolling mills
  5. 5. Friction clutches Single plate clutch Multiplate clutch
  6. 6. Centrifugal clutch Driving shaft Driven shaft F=mrω 2 ω ω Cone clutch
  7. 7. Design and torque transmitted Area of the ring on contacting surface rrA  2 Axial load on the ring rrpW  2 Frictional resistance offered by ring rprWFr  2 Frictional torque acting on ring rprrFT rr  2 2 Torque transmitted is obtained by considering following two assumptions: a) Uniform pressure theory b) Uniform wear theory
  8. 8. p = Constant   T R R r rprT 0 2 1 2 2  rrpT R R T r    1 2 2 0 2 Torque transmitted  3 2 3 1 3 3 2 3 2 1 2 RRp r pT R R           3 2 3 12 2 2 13 2 RR RR W T               2 2 2 1 3 2 3 1 3 2 RR RR WT  Uniform pressure theory
  9. 9. Uniform wear theory  In this theory, we are considering that wear which take place is uniform over the entire contacting surface i.e. p.r = Constant So, p = C/r  We know that axial loading acting on the ring is, Integrating above equation within limits we get, rCW rr r CrrpW   2 ...2...2.        21 21 0 2 22 2 1 2 1 2 RR W C RRCrCW rCW R R R R W        
  10. 10. We know that, frictional torque acting on the ring is, Torque transmitted by single plate clutch can be obtained by integrating the equation within the limits R2 to R1 we get, rCrrr r C T rprT r r   22 2 2 2      2 2 2 1 2 2 2 1 2 0 0 2 2 2 2 2 2 1 2 1 2 1 2 RRCT RR C r CT rrCT rrCT R R R R T r R R T r                 
  11. 11. • Power transmitted by single plate clutch is given by, Where, N = Speed of driving shaft Watt NT P TP 60 2 .    

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