| 摘要 |
<p>An axial flow compressor with a bleed duct (88) and bleed apertures (84,86) in an inner casing (42) and an outer casing (70) is provided with loading devices (92) which are positioned circumferentially at an angle of from the bleed duct (88) such that the loading devices apply loads on the inner casing (42). Components of the loads applied by the loading devices (92) are arranged to oppose and preferably balance any loads applied on the inner casing (42) due to the provision of the bleed duct (88). The loading devices (92) comprise cylinders (94) secured to the inner casing (42) and pistons (96) secured to the outer casing (70) to form chambers (98). The chambers (98) are supplied with fluid at a predetermined pressure. The loading devices oppose undesirable local reductions in clearance (66) between static shrouds (58,60,62,64) and the rotor blades (40).</p> |
