| 摘要 |
<p>The plant has an intermediate connection member (4) between a gas generator (3) and a power stage (7), which member (4) acts as a heat- exchanger for the stator box (6) of the power stage (7) with which lt is thermally in contact at its downstream end (4''). The member (4) is provided with an electric heating coil (15) embedded in its external surface and with an inner annular chamber (17) within which cooling air is caused to flow along a helical path from the downstream end to the upstream end of the chamber. Heating by coil (15) during start-up causes the stator box (6) to expand, thus permitting a reduction in clearance between the rotor discs and box (6). When elevated temperatures have been attained, the cooling air can cause appropriate cooling to ensure efficient operation. Valves 19, 22 can control the cooling air. <IMAGE></p> |
