Dynamic balancing can be defined as the process of balancing rotating parts of a machine. A rotating component is normally part of industrial or other equipment. If there is any imbalance, it will be measured and detected using electronic equipment. If detected, the imbalance can be corrected by removing or adding weights onto the rotating parts.
Most rotating machines such as motors and engines normally rotate at very high speeds. If there is any imbalance, it tends to cause a lot of vibration and noise. Vibrations reduce the lifespan of various components and parts of a machine. An ideal situation is one where a dynamic machine is balanced so that it rotates in a perfect manner, causing no imbalance, no noise and no vibrations.
Balancing of rotating bodies
Machines such as gas turbines and electric generators have rotating parts that rotate at high speeds. These machines can fail if they vibrate frequently so vibrations need to be avoided. There are two types of balance when it comes to rotating objects. These are the static and dynamic.
Static balance is where an object has its center of gravity along its axis of rotation. Such an object is balanced without movement and will not require an external force to deter motion. If the object was unbalanced, it would tend to swing or move towards the heavier side and may require an external force such as a brake to keep it from moving.
Dynamic balance involves a rotary system. When a system in unbalanced periodic forces, both linear and rotary, will be generated. These will be experienced as vibrations. The vibrations will imply presence of unbalanced forces which sometimes exceed the design limits of components like a ball bearing. Such a system needs to be balanced so as to get rid of the linear and rotary forces.
Balancing a car wheel
When a car tire has dynamic imbalance, it will not rotate as required and more pressure will bear on one side. Such a car is dangerous to drive. The tire will wear very fast and the car will consume more fuel than necessary to try and counter the periodic linear and rotary forces.
Such a wheel can be balanced by simply putting it on a wheel balancing machine and using the electronic equipment to check for imbalance. Weights can be added and distributed accordingly to minimize the imbalance. Once properly balanced, it will rotate in a linear manner rather than follow and elliptical path.
Balancing of rotating machine parts
Balancing of rotating components simply implies reducing the imbalance as much as possible. When machines are out of balance, they make a lot of noise, they contribute to rapid wear and tear, are inefficient and result in high energy consumption.
The process of dynamic balancing simply refers to removal or addition of weight on the rotating components so as to affect the center of gravity and align it as close as possible to the axis of rotation. This will result in more balanced rotation with less noise, low wear and tear and more efficient operations.