A New Static Balancing Machine operating on the Pneumatic Principle

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  • 空気圧式静つりあい試験機の研究
  • クウキアツシキ セイツリアイ シケンキ ノ ケンキュウ

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Description

We constructed a new static balancing machine operating on the pneumatic principle by which the unbalance of the rotors of electric machines could be read directly on an indicator and no lengthy operations required. The detail of the construction of the balancing machine is described with the schematic diagram and the precisely measured characteristic values of the principal parts of the machine. The maximum range of the indicator of the machine is ±150 g-cm and the accuracy is about 1 g-cm through the whole range. The performance of the balancing machine was investigated theoretically on the statical equilibrium and on the dynamical aspects. The calculated period of the natural oscillation of the machine is 5.4 sec against 5.2 sec which is a measured value. The oscillation caused by the up and down motion of rotors damped out in about 20 sec. The measurement of the unbalance must be made twice for one rator (x-direction and y-direction), so the total time of operation for the balancing of one rotor will be less than 60 sec.

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