| 摘要 |
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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