TURBOMACHINE WITH A COOLED COUPLING GUARD

摘要

A coupling guard (1) for a rotating member (15) comprises: a shell (11) surrounding the rotating member (15), a plenum (25) disposed in the shell (11), at least an injection tube (12) for injecting a cooling gas and an outlet (13) for discharging the cooling gas, wherein said injection tube (12) extends through said plenum (25) from a first axial opening (31) proximal to said shell (11) to a second axial opening (32) proximal to said rotating member (15), said injection tube (12) having a leading edge (41) which first contacts the gas circulating in the plenum and a trailing edge (42) opposite to the leading edge (41), said second opening (32) having a first portion (32a) orthogonal to the axis (X) of said injection tube (12) and a second portion (32b) across said trailing edge (42), adjacent to said first portion (32a) and parallel to the axis (X) of said injection tube (12).