Patent ID: 9709062
Date: 2017-07-18
CPC Classifications: F04D,F05D,Y10T

Claim:
1. A centrifugal compressor, comprising: a volute casing including a first casing and a second casing, the first casing including a volute chamber therein and the second casing including an impeller installation space therein; an impeller provided in the impeller installation space so as to be rotatable around a rotation axis; and a vaneless diffuser that includes an inlet that communicates with an inside of the second casing and includes an outlet that communicates with an inside of the first casing, wherein the vaneless diffuser has a width that changes over an entire range in a circumferential direction rotating around the rotation axis such that, as a position of the vaneless diffuser is shifted in the circumferential direction, the width gradually increases, and then, gradually decreases.