| 摘要 |
PROBLEM TO BE SOLVED: To provide a centrifugal compressor in which a pressure recovery factor in a diffuser is improved and deterioration of processing accuracy and assembling accuracy of a guide blade is prevented.SOLUTION: A centrifugal compressor includes a radial impeller, and a diffuser 7. The diffuser 7 includes: a first annular flow channel 7a provided so as to surround the radial impeller, and formed between a pair of planar flow channel wall surfaces 7a1 and 7a2 facing in parallel each other; a second annular flow channel 7b disposed in the outside of the first annular flow channel 7a, and formed between a pair of planar flow channel wall surfaces 7b1 and 7b2 facing in parallel each other at an interval wider than that of the flow channel wall surfaces 7a1 and 7a2 forming the first annular flow channel 7a; a first guide blade 7d disposed in the first annular flow channel 7a; and a second guide blade 7e disposed in the second annular flow channel 7b and having a blade height larger than that of the first guide blade 7d. |
