Balancing Of Rotating Masses
Dynamic Balancing Equations
Balancing of rotating masses • 1. 8/25/2015 1 Hareesha N G, Dept of Aero Engg, DSCE, Blore • Unit 4: Balancing of Rotating Masses • Static and dynamic balancing • Balancing of single rotating mass by balancing masses in same plane and in different planes. Medical physiology boron torrent pdf reader. • Balancing of several rotating masses by balancing masses in same plane and in different planes.
The purpose of Balancing Inertia forces in high speed rotating machines and engines is to avoid putting components under high bearing loads and stresses, and eliminating harmful vibrations (Hammer Blows). Balancing Rotating Masses with the help of balance weights, for masses in: A Single Plane. Parallel Planes. Balancing of rotating parts is necessary for every engine, only in high speed engines it becomes very important. The force exerted by the rotating parts is proportional to the square of the rotational speed, omega.
8/25/2015 Hareesha N G, Dept of Aero Engg, DSCE, Blore 2 • What is Balancing? • Often an unbalance of forces is produced in rotary or reciprocating machinery due to the inertia forces associated with the moving masses. • Balancing is the process of designing or modifying machinery so that the unbalance is reduced to an acceptable level and if possible is eliminated entirely. 8/25/2015 Hareesha N G, Dept of Aero Engg, DSCE, Blore 3 • • A particle or mass moving in a circular path experiences a centripetal acceleration and a force is required to produce it.
Balancing Of Rotating Masses Experiment
• An equal and opposite force acting radially outwards acts on the axis of rotation and is known as centrifugal force. • This is a disturbing force on the axis of rotation, the magnitude of which is constant but the direction changes with the rotation of the mass. • In a revolving rotor, the centrifugal force remains balanced as long as the centre of the mass of the rotor lies on the axis of the shaft. • When the centre of mass does not lie on the axis or there is an eccentricity, an unbalanced force is produced 8/25/2015 Hareesha N G, Dept of Aero Engg, DSCE, Blore 4 • Why Balancing is necessary? • The high speed of engines and other machines is a common phenomenon now-a-days.