TURBINE VENTILATION STRUCTURE

摘要

A turbine ventilation structure includes: an exhaust diffuser including inner and outer tubes to form an exhaust passage for exhaust gas; a strut extending across the exhaust diffuser from a housing to support a bearing inside the inner tube; a strut cover in the exhaust passage that covers the strut; and a connecting member disposed downstream of the strut cover and including a hollow portion to connect the housing and the inner tube. The housing includes a first intake port to introduce an air from outside. The strut cover has a discharge hole at a rear edge portion thereof. The turbine ventilation structure includes a first ventilation passage extending from the first intake port through the hollow portion, then extending from an inner end portion of the strut through between the strut and the strut cover, and the discharge hole, into the exhaust passage.

主权项

1. A turbine ventilation structure in a gas turbine engine, comprising:
an exhaust diffuser including an inner tube and an outer tube to form therebetween an annular exhaust passage through which an exhaust gas from a turbine passes; a strut extending across the exhaust diffuser from a housing disposed radially outward of the outer tube and configured to support a bearing inside the inner tube; a strut cover, disposed in the exhaust passage, configured to cover an outer circumference of the strut; and a connecting member connecting the housing and the inner tube, the connecting member being disposed downstream of the strut cover in the exhaust passage and including therein a hollow portion in which an accessory is inserted, the connecting member, wherein the housing includes a first intake port to introduce an air from outside, the strut cover has a discharge hole at a rear edge portion thereof, the turbine ventilation structure further comprising a first ventilation passage extending from the first intake port through the hollow portion of the connecting member, then extending from an inner end portion of the strut through a cavity between the strut and the strut cover, and the discharge hole of the strut cover, into the exhaust passage.