Casing of a turbomachine with a by-passing system

摘要

The housing (1) has a fluid conveying system (24) for redirecting partial flow (26) of main flow (6) running through an annular space delimited by a peripheral wall (2). The fluid conveying system has integral front and rear annular channels (30a,30b) connected by an axial passage (28). The channels have respective annular space openings (34a,34b) opened or closed independently by valve devices. An outlet opening (40) taps partial flow from the conveying system. Partial flow is directed through either annular channel in the closed state of its respective annular space opening.