| 摘要 |
A turbine shroud assembly 100 comprises an inner shroud 102 having a surface 112 adjacent a hot gas path 114, an outer shroud 104, and a damper block 106 disposed between the inner shroud and the outer shroud. First and second biasing apparatus 108, 110 bias the inner shroud and the damper block respectively, in respective first and second deflection distances 118, 124, in a direction 120 towards the hot gas path and away from the outer shroud. The second deflection distance is greater than the first deflection distance, loading the damper block to the inner shroud. Both biasing apparatus may be springless, driven by pressure fluid, and include at least one bellows 114 and at least one thrust piston 200. Alternatively, the first and second biasing apparatus may include springs (300, figure 3). The assembly may include an adjustable deflection limiter disposed so that the first deflection distance does not exceed a predetermined deflection 128. The assembly may include a third biasing apparatus 130 providing a biasing force 132 to the damper block, biasing the damper block a third deflection distance 134 in direction 120. |
