GB1355728A - Gas turbine - Google Patents

Abstract

1355728 Gas turbine engine combustion equipment WESTINGHOUSE ELECTRIC CORP 23 Oct 1972 [9 Dec 1971] 48679/72 Headings F1G and F1L The invention relates to combustion equipment of a gas turbine engine and to the mounting of a transition member by which gases pass from a flame tube to the turbine inlet guide vane assembly. The engine shown comprises a compressor 12, combustion equipment 16 and a turbine 14, the combustion equipment comprising a casing assembly which defines a plenum chamber 32 in which is mounted a series of flame tubes 30, each flame tube being connected by a transition member 31 to the turbine inlet guide vane structure 20. The combustion chamber casing comprises parts 33, 34, 35 which define with the compressor casing 36 and outlet diffuser 37, also stationary structure 39, 40, 41 surrounding the shaft 28, the plenum chamber 32. The flame tube comprises a series of overlapping wall members 44a, b, c, d, e, f and is secured at its upstream end to the casing part 34. The transition member is of circular form at its upstream end and of arcuate form at its downstream end, the upstream end surrounding the downstream end member 44f of the flame tube. A pair of segmented annular spring members 56, 57 is secured at the downstream end of the member 44f and resiliently engages the upstream end of the transitlon member. The downstream end of the transition member is rigidly secured to the turbine inlet structure by means of a plate 85 secured to the transition member by welding and to the inlet structure by bolts. The upstream end of the transition member is supported for axial movement by a yoke structure comprising members 66, 68 secured to the casing parts 37, 41 and members 64, 65 which define a V-shape within which the transition member is supported by means of two pairs of U-shaped members, each pair comprising a member 70, 71, 74 secured to the transition member 31, and a member 72, 73 secured to the support structure 64, 65; the limb 74 of the first member is received within the recess 73 of the second member in such manner as to permit axial movement of the upstream end of the transition member. The outlet end of the transition member comprises radial walls 77, 78 and circumferential walls 79, 80 the walls 77, 78 being formed with ribs 77a, 78a, the ribs of adjacent members cooperating to secure the members together; the walls 79, 80 are formed with ribs 79a, 80a which co-operate with members secured to the inlet guide structure.