Balancing of a Single, Several and Reciprocating Rotating Mass

Balancing is the process of eliminating or at least reducing the ground forces and/or moments. It is achieved by changing the location of the mass centres of links. Balancing of rotating parts is a well known problem. A rotating body with fixed rotation axis can be fully balanced i.e. all the inertia forces and moments. For mechanism containing links rotating about axis which are not fixed, force balancing is possible, moment balancing by itself may be possible, but both not possible. We generally try to do force balancing. A fully force balance is possible, but any action in force balancing severe the moment balancing.

BALANCING OF A SINGLE ROTATING MASS BY SINGLE MASS ROTATING IN THE SAME PLANE:

BALANCING OF A SINGLE ROTATING MASS BY TWO MASSES ROTATING IN THE DIFFERENT PLANE:

BALANCING OF A SEVERAL MASSES ROTATING IN SAME PLANE:

BALANCING OF SEVERAL MASSES ROTATING DIFFERENT PLANE:

BALANCING OF RECIPROCATING MASSES:

 Mass balancing encompasses a wide array of measures employed to obtain partial or complete compensation for the inertial forces and moments of inertia emanating from the crankshaft assembly. All masses are externally balanced when no free inertial forces or moments of inertia are transmitted through the block to the outside. However, the remaining internal forces and moments subject the engine mounts and block to various loads as well as deformities and vibratory stresses. The basic loads imposed by gas-based and inertial forces

Primary and secondary unbalanced forces of reciprocating parts: