Axial Compressor, Gas Turbine with Axial Compressor, and its Remodeling Method

摘要

An axial compressor includes: a rotor as a rotational shaft; a plurality of rotor blades mounted on the rotor; a compressor casing that covers the rotor and the rotor blades; a plurality of stator vanes mounted on the compressor casing. The rotor blades and the stator vanes are each disposed in a circumferential direction of the rotational shaft to form a rotor-blade cascade and a stator-vane cascade, respectively. The rotor-blade cascade and the stator-vane cascade are arranged in plural rows, respectively, in an axial direction of the rotational shaft. The stator vane has a dovetail as a base for supporting a vane section. The compressor casing has a dovetail groove formed therein. The dovetail groove extends in the circumferential direction of the rotational shaft to receive the dovetail inserted therein to fix the stator vanes. Two or more stator vanes, the stator vanes belonging to stator-vane cascades different from each other, are fixed in the dovetail groove.

主权项

1. An axial compressor comprising:
a rotor as a rotational shaft; a plurality of rotor blades mounted on the rotor; a compressor casing that covers the rotor and the rotor blades; and a plurality of stator vanes mounted on the compressor casing, the rotor blades and the stator vanes being each disposed in a circumferential direction of the rotational shaft to form a rotor-blade cascade and a stator-vane cascade, respectively; the rotor-blade cascade and the stator-vane cascade being arranged in plural rows, respectively, in an axial direction of the rotational shaft; wherein the stator vane has a dovetail as a base for supporting a vane section, the compressor casing has at least one dovetail groove extending in the circumferential direction of the rotational shaft, the dovetail groove receiving the dovetail inserted therein to fix the stator vane, and two or more stator vanes, the stator vanes belonging to stator-vane cascades different from each other, are fixed in the one dovetail groove.