LANCE INJECTOR FOR INJECTING FUEL INTO A COMBUSTION CHAMBER OF A GAS TURBINE

摘要

A lance injector for injecting fuel into a combustion chamber (2) of a gas turbine comprises: a coaxial first tubular body (15) and second tubular body (16); a nozzle (20) connected to respective first ends (15a, 16a) of the first tubular body (15) and of the second tubular body (16); a guiding bushing (30) fitted on the first tubular body (15) so as to allow the relative axial sliding of the first tubular body (15) with respect to the second tubular body (16) due to expansion and contraction; and sealing members (27) between the first tubular body (15) and the guiding bushing (30). The sealing members are defined by at least two sealing rings (38) and the first tubular body (15) and the guiding bushing (30) are separated by an annular gap, except at the sealing rings (38).