Patent ID: 6471475
Filing Date: 2002-10-29
Classification: F04D,F05D

Abstract:
A diffuser assembly for directing a flow of compressed air with a radial component from a centrifugal compressor impeller to a diffused annular flow having an axial component, comprising:a first bowl-shaped casing shell having a first annular diffuser portion, a first downstream annular edge co-axial with the first annular diffuser portion, and a surface having a plurality of grooves extending therebetween and separated by seam edges; a second bowl-shaped casing shell having a second annular diffuser portion concentric with the first annular diffuser portion, a second annular downstream edge co-axial with the second diffuser portion, and a smooth surface of revolution extending therebetween; and the first and second bowl-shaped casing shells being concentrically nested, the second shell closing the grooves at the surface of revolution thus defining a diffuser at the first and second diffuser portions and a plurality of individual diffuser pipes extending from the diffuser to the first and second downstream edges when the seam edges of the first shell are secured to the surface of revolution of the second shell.