TURBOMACHINE WITH A COOLED COUPLING GUARD

摘要

A coupling guard for a rotating member comprising a shell surrounding the rotating member, a plenum disposed in the shell, at least an injection tube for injecting a cooling gas and an outlet for discharging the cooling gas, wherein the injection tube extends through the plenum from a first axial opening proximal to the shell to a second axial opening proximal to the rotating member, the injection tube having a leading edge which first contacts the gas circulating in the plenum and a trailing edge opposite to the leading edge, the second opening having a first portion orthogonal to the axis of the injection tube and a second portion across the trailing edge, adjacent to the first portion and parallel to the axis of the injection tube.

主权项

1. A rotating machine comprising a rotating member and a coupling guard, the coupling guard comprising:
a shell surrounding the rotating member, a plenum disposed in the shell; and at least an injection tube for injecting a cooling gas and an outlet for discharging the cooling gas so that rotation of the rotating member draws cooling gas through the injection tube and into the plenum, wherein the cooling gas circulates through the plenum substantially circularly or spirally to cool the shell before the cooling gas exhausts through the outlet; and wherein the injection tube extends radially through the plenum from a first opening proximal to the shell to a second opening proximal to the rotating member, the injection tube having a leading edge which first contacts the cooling gas circulating in the plenum and a trailing edge opposite to the leading edge, the second opening having a first portion oriented substantially tangentially and substantially parallel to the circulation direction of the cooling gas and a second portion oriented substantially radially and substantially orthogonal to the circulation direction of the cooling gas.