Patent ID: 9567914
Date: 2017-02-14
CPC Classifications: F01D,F02C,F04D

Claim:
1. A system for bleeding off a working fluid from an inner volume (Vi) of a turbo-machine, the system comprising a vane carrier comprising an annular rail, a vane device comprising at least one vane element, at least one vane platform and a vane root, wherein the vane element is mounted to the vane platform, wherein the vane root is mounted to the annular rail, wherein a first annular cavity is formed by a space between a radially outer surface of the vane platform and the annular rail, wherein an annular gap is formed between an edge of the vane platform and the vane carrier such that a part of the working fluid of the turbo-machine is bleedable through the annular gap into the first annular cavity, wherein a second annular cavity is formed between the vane root, the annular rail and the vane carrier radially outward of the vane root along a radial axis of the vane element, and wherein at least one inlet hole is formed into the annular rail without a further hole or other weakening provision being formed in the vane device for coupling the first annular cavity and the second annular cavity.