| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent generation of a dead water area in a diffuser so as to reduce a loss and increase stage efficiency in the diffuser. SOLUTION: In a cooling air taking out device of a diffuser part in a radial compressor stage of a gas turbine, a last compressor stage comprises a radial guide impeller 2 having a diffuser with diffuser blades 3. The diffuser blade 3 is used both as an attaching element 7 for diffuser housing side parts 20.1, 20.2 and a connection element between a rear side bearing housing 21 and a guide blade carrier 1. Compressed cooling air is taken out through both a machined circular hole 6.1 in a suction side of the diffuser blade 3 and a slit 6.2. The cooling air reaches into a blind hole 19 through the taking out opening 6.1, 6.2, and then through a hole 19.1 in a diffuser housing outside 20.2 into a cooling air emission part 10 disposed within a compressor housing.</p> |
