Balancing of rotating masses in same plane Graphical method ||

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Balancing of rotating masses in same plane
The process of providing the second mass in order to counteract the effect of the centrifugal force of the first mass, is called balancing of rotating masses. The following cases are important from the subject point of view: 1. Balancing of a single rotating mass by a single mass rotating in the same plane.
The balancing of rotating bodies is important to avoid vibration. In heavy industrial machines such as gas turbines and electric generators, vibration can cause catastrophic failure, as well as noise and discomfort. In the case of a narrow wheel, balancing simply involves moving the center of gravity to the centre of rotation. For a system to be in complete balance both force and couple polygons should be close in order to prevent the effect of centrifugal force. It is important to design the machine part's wisely so that the unbalance is reduced up to the minimum possible level or eliminated completely.
Static balance
Static balance occurs when the centre of gravity of an object is on the axis of rotation.[1] The object can therefore remain stationary, with the axis horizontal, without the application of any braking force. It has no tendency to rotate due to the force of gravity. This is seen in bike wheels where the reflective plate is placed opposite the valve to distribute the centre of mass to the centre of the wheel. Other examples are grindstones, discs or car wheels.
Dynamic balance
Rotating shaft unbalanced by two identical attached weights, which causes a counterclockwise centrifugal couple Cd that must be resisted by a clockwise couple Fℓ = Cd exerted by the bearings. The figure is drawn from the viewpoint of a frame rotating with the shaft, hence the centrifugal forces.
A rotating system of mass is in dynamic balance when the rotation does not produce any resultant centrifugal force or couple. The system rotates without requiring the application of any external force or couple, other than that required to support its weight. If a system is initially unbalanced, to avoid the stress upon the bearings caused by the centrifugal couple, counterbalancing weights must be added. This is seen when a bicycle wheel gets buckled. The wheel will not rotate itself when stationary due to gravity as it is still statically balanced, but will not rotate smoothly as the centre of mass is to the side of the centre bearing. The spokes on a bike wheel need to be tuned in order to stop this and keep the wheel operating as efficiently as possible.[2]
Balancing of rotating masses in same plane
Balancing of rotating masses in same plane in hindi
hindi Balancing of rotating masses in same plane
Balancing of rotating masses
Balancing of rotating masses in same plane theory of machine
Balancing of rotating masses in same plane TOM
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Balancing of rotating masses in same plane in hindi || Balancing of rotating several masses || TOM
Balancing of rotating masses in same plane in hindi || Balancing of rotating several masses || TOM
balancing of rotating several masses in hindi
balancing of rotating several masses in same plane
Balancing of rotating masses in same plane hindi || balancing of rotating masses Graphical method
static balancing
static balancing of rotating masses