초록 ▼

A narrow efficient operating island for a centrifugal compressor may be increased in a construction including a compressor section 18 mounting blades 22 surrounded by an annular shroud 38 by placing bleed passages 88 in the shroud 38 and angling them in the direction of flow, both axially (FIG. 1) a

A narrow efficient operating island for a centrifugal compressor may be increased in a construction including a compressor section 18 mounting blades 22 surrounded by an annular shroud 38 by placing bleed passages 88 in the shroud 38 and angling them in the direction of flow, both axially (FIG. 1) and radially (FIG. 3).

대표청구항 ▼

In a rotary machine, the combination of: a rotor hub; means journalling the rotor hub for rotation about an axis; a plurality of blades on the rotor hub each extending in a curve from a radially inner first location to a radially outer second location axially spaced from said first location to defin

In a rotary machine, the combination of: a rotor hub; means journalling the rotor hub for rotation about an axis; a plurality of blades on the rotor hub each extending in a curve from a radially inner first location to a radially outer second location axially spaced from said first location to define an axial inflow, radial outflow compressor rotor with said rotor hub, said blades having free peripheral edges, an inducer section having a throat, and an impeller section downstream of said inducer section; an annular shroud about said rotor and having opposed ends and an inner surface just slightly spaced from said peripheral edges; said shroud having an inlet opening at the end thereof nearest said first location and an opposite outlet opening at the other end thereof and nearest said second location; and a series of bleed passages in said shroud extending from said inner surface and in fluid communication with said inlet opening via a path radially outward of said inner surface, said passages being directed generally toward said second location from said inner surface and emerging at said inner surface at or axially downstream of a plane transverse to said axis and intersecting said inducer section.