Measuring and testing – Rotor unbalance – Dynamic
Patent
1986-04-11
1987-08-25
Chapman, John
Measuring and testing
Rotor unbalance
Dynamic
G01M 116
Patent
active
046884270
ABSTRACT:
An apparatus for measuring the dynamic imbalance in a bearing ball (10) includes a support member (32) having a concave surface (34) for receiving and positionally retaining the ball (10). A cushion of compressed gas is established between the concave surface (34) and the ball (10) by a plurality of flow passages (36) disposed in the support member (32). Rotating motion is imparted to the ball (10) by an intermittent gas jet (46) and the subsequent motion (28) of the axis of rotation (22) resulting from the presence of any dynamic imbalance within the sphere (10) is measured (68, 70, 72).
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H. Goldstein, Classical Mechanics, Addison-Wesley, Reading, Mass., 1965, pp. 159-163.
Chapman John
Snyder Troxell K.
United Technologies Corporation
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