8 Balancing and Vibrations (17412)
Write the procedure for balancing of a single rotating mass by single masses rotating in the same plane.
The high speed of engines and other machines is a common phenomenon now-a-days. It is, therefore, very essential that all the rotating and reciprocating parts should be completely balanced as far as possible. If these parts are not properly balanced, the dynamic forces are set up.
Write the procedure of balancing single rotating mass when it balance mass is rotating in the same plane as that of disturbing mass.
Explain the process of balancing of single rotating mass by a single mass rotating in the same plane.
m = Mass attached to shafts,
r = Distance of CG from axis of rotation.
Consider mass ‘m’ is attached to rotating shaft at a radius are then the centrifugal force exerted by mass ‘M’ on the shaft is
Fc = Mw2R Where,
W = Angular velocity of shaft
R = Distance of CG from axis of rotation
M = Mass attached to shaft.
Adverse effect of imbalance of rotating elements:
a) Vibration, noise and discomfort,
b) Machine accuracy get disturbed,
c) Power losses,
d) More maintenance
Reasons for balancing of rotating elements of machine: The balancing of the moving parts both rotating and reciprocating of such machine is having greater importance. Because, if these parts are not balanced properly then the unbalanced dynamic forces can cause serious consequences, which are harmful to the life of the machinery itself, the human beings and all the property around them. These unbalanced forces not only increase the load on the bearings and stresses in various members, but also produces unpleasant and dangerous vibrations in them.