| 摘要 |
<p>To determine the contact angle (±k) of a ball bearing (10), one (13) of the rings is rotated while the other ring (11) is held stationary. The number of revolutions of the rotated ring (13) and the number of revolutions accomplished in the same period by the balls (15), and therefore by the retaining cage (16), are detected. The revolutions of the balls are detected through an optical detecting device (D) which projects a radiation (L) through the bearing (10), in the gap between the outer (11) and inner (13) rings, whereby the radiation (L) is intercepted directly by the balls (15) and/or the cage (16). The contact angle is determined using the following parameters: the number of revolutions of the rotating ring (13), the number of revolutions of the balls (15) or of the cage (16), the diameter (Dw) of the balls, and the pitch diameter (Dd).</p> |
