Patent ID: 9683576
Date: 2017-06-20
CPC Classifications: F04D,F05D

Claim:
1. An impeller for a centrifugal compressor, the impeller comprising: a web and blades secured to the web on a front face of the web, each blade including a blade root, a blade tip, a leading edge, and a trailing edge, wherein a point of intersection between the trailing edge and the blade root is further forward, by at least one half-thickness of the web, relative to the blade root at an intermediate diameter of the impeller, wherein a point of intersection between the trailing edge and the blade tip is also further forward relative to the blade tip at the intermediate diameter of the impeller, wherein the blade root at a periphery of the impeller is radially oriented, and wherein said web comprises a first curved peripheral segment with a concave front face segment, said first curved peripheral segment extending toward a periphery of said impeller from said intermediate diameter, and a second curved peripheral segment with a convex front face segment, said second curved peripheral segment extending toward said periphery of said impeller from said first curved peripheral segment.