| 摘要 |
<p>In a nutating machine such as a high intensity comminution machine having a nutating drum (1), a support bearing is provided by pairs of rolling bearing surfaces (6 and 8, and 7 and 9). In order to reduce power requirements and wear each pair of complementary contact paths traced out by the bearing surface pairs has an equal ratio of path length in the stationary bearing surface (8, 9) to the path length in the nutating bearing surface (6, 7). In one embodiment, irrotational movement of the nutating element is achieved by having equal path lengths as between the stationary bearing surface and the nutating bearing surface in both pairs.</p> |
