Patent ID: 9151297
Filing Date: 2015-10-06
Classification: F04D,F05D

Abstract:
1. A centrifugal compressor comprising: an asymmetric self-recirculating casing treatment that includes, on an inner face of a casing, a suction ring groove, a ring guide channel and a back-flow ring groove to form a self-recirculating channel, wherein the self-recirculating casing treatment has a plurality of parameters, including a axial distance S wherein a position of the suction ring groove is shiftable in a circumferential direction, wherein, as the position of the suction ring groove shifts in the circumferential direction, either the axial distance S wherein the first circumferential range and the second circumferential range each continuously extend in the circumferential direction, and the first circumferential range and the second circumferential range form one complete circling range, wherein a shape of change in the axial distance S wherein the arc has a center angle α in a range of 0<α≦30°.