| 摘要 |
<p>PURPOSE:To make it possible to use pin joints only for the connection of each point by individually connecting ring plates fixed to a nozzle shaft to each other by means of connection plates. CONSTITUTION:When a drive lever 27 is swung by the extension and contraction of a drive device 28, a link plate 23' fixed to the drive lever 27 swings and change the angle of a nozzle 6' through a nozzle shaft 4. At the same time, the swing of the link plate 23' is transmitted via a connection plate 24 successively to links 23, 23''. The angles of nozzles 6, 6'' are also changed through the nozzle shaft 4. Because the link plates 23 neighboring each other are connected to form a parallelogram-shaped link with connection plates 24, the connection plate 24 is able to move in the radial direction of a turbine blade wheel when the link plate 23 is swung. Thus, because all the pivots can be constituted with pin joints by rotary only, the number of sliding sections vulnerable to damages due to simultaneous effects of high temperature oxidation and sliding wear can be eliminated.</p> |
