Statement 1:
Uniform pressure theory is only applicable when clutches are new and having many
springs. Here, the intensity of pressure can be assumed constant between the disks.
Statement 2:
The tar que transmitting capacity for one pair of the clutch's contacting surfaces under
(R +r)
uniform pressure theory is I = UF 1. where F is the actuating force 1 is the coefficient of friction, Ris the outer radius of the disk and ris the inner radius of the disk
A Both statements are correct
C. Only statement 2 is correct
B. Only statement 1 is correct
D. Both statements are incorrect
rect
Answers
Answer:
FIRST YOU NEED TO KNOW UNIFORM PRSSURE THEORY
(i) Uniform pressure theory:
When the mating component in clutch, bearing are new, then the contact between
surfaces may be good over the whole surface.
It ALSO means that the pressure over the rubbing surfaces is uniform distributed.
This condition is not valid for old clutches, bearings because mating surfaces may have uneven friction.The condition assumes that intensity of pressure is same.
P = W/A =Constant; where, W= load, A= area
(ii) Uniform wear theory in clutches and bearings:When clutch, bearing become old after being used for a given period, then allparts of the rubbing surfaces will not move with the same velocity.
The velocity of rubbing surface increases with the distance from the axis of therotating element.
It means that wear may be different at different radii and rate of wear depends upon the intensity of pressure (P) and the velocity of rubbing surfaces (V).
It is assumed that the rate of wear is proportional to the product of intensity of pressure and velocity of rubbing surfaces.
This condition assumes that rate of wear is uniform;
P*r = Constant; where, P = intensity of pressure, r = radius of rotation
Explanation:
HOPE THIS HELPS
Answer:
Both statements are correct