English

Dynamic Balancing

In the design of machinery, it should be ensured, as far as possible, that no unnecessary vibration is present when the machinery is operating, as vibrations may contribute to the fracture of certain parts of the mechanism or structure. This is particularly important in the case of high-speed machinery, such as steam turbines, high-speed internal combustion engines, etc. Vibrations may arise from any of a number of sources, common examples being unbalance of rotating parts about their axis of rotation, torsional oscillations of shafts, and inertia forces inherent in reciprocating mechanisms. It is the purpose of this paper to show how the first of these examples, the unbalance of rotating parts, may be dealt with in the design of the machinery, and also to show what means exist to rectify unbalance due to inaccuracies of manufacture.

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