Importance

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Abstract

In an emission probe (11, 21) for the removal of exhaust gas from the combustion chamber of a gas turbine, comprising a one-piece probe tube (12, 22, 31, 41) which, in its interior, has an emission passage (13, 24, 32, 42) extending in the direction of the tube axis and two cooling passages (14a,b; 25; 25a,b; 34a,b; 45a,b) extending parallel to the emission passage (13, 24, 32, 42) and adjacent to one another, optimum cooling in combination with simple construction is achieved by virtue of the fact that, as seen in cross section, the cooling passages (25; 25a,b; 34a,b; 45a,b) at least partially enclose the emission passage (24, 32, 42) and occupy the interior of the probe tube (22, 31, 41) to an extent such that the wall thickness of the tube wall (212; 38; 48) between the cooling passages (25; 25a,b; 34a,b; 45a,b) and the external space surrounding the probe tube (22, 31, 41) is approximately constant over the majority of the tube circumference, and wherein a plurality of cooling ribs (210; 35; 44) is provided, which project from the tube wall (212; 38; 48) into the interior of the cooling passages (25; 25a,b; 34a,b; 45a,b).

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First Claim