| 摘要 |
<p>A spin tuned magnetron includes a spinner (3) which interacts with a magnetron cavity to modulate its frequency of oscillation. The spinner runs in bearings (8, 9) around a shaft (7). The lives of the bearings are a controlling factor in the life of the magnetron.</p><p>The outer races (OR) are fixed in position relative to each other and to the spinner by spacers (13, 14) and a spring (15) arranged between an abutment (11) and a circlip (12) on the spinner. The inner races (IR) are arranged to be moveable relative to each other and to the shaft by virtue of spacers (10) and (17), a spring (16) between the inner races, and a further spring (18). A pole-piece nose (4) is arranged to be screwed down on the shaft to compress the springs (16) and (18) to provide a desired amount of axial float on the spinner. By setting the axial float the bearing load can be shared as desired and thus increase the lives of the bearings.</p> |
