Probe lead-through for a combustion chamber

摘要

In a probe lead-through for a combustion chamber with a hot-gas housing (21) enclosing a combustion space (41) and a cooling-air housing (19) which surrounds the hot-gas housing (21) at a distance, between which housings a cooling-air duct (20) is formed, and with a probe with a probe tube (7, 40, 52) which has access from outside to the combustion space (41) via a first probe opening (57) in the cooling-air housing (19) and a second probe opening (58) in the hot-gas housing (21), and with means which, in the region of the probe openings (57, 58), seal off the cooling-air duct (20) from the combustion space (41) and the space situated outside the cooling-air housing (19), an improvement and simplification of the sealing is achieved by virtue of the fact that the sealing means comprise a sealing washer (60) which surrounds the probe tube (7, 40, 52) in a sealing manner and rests from the outside by a sealing surface (59) on the rim area of the cooling-air housing (19) surrounding the first probe opening (57), and the sealing washer (60) is guided so as to be displaceable in the direction of the probe axis and is preloaded by a first compression spring (10, 33, 45a) and seals against the hot-gas housing. <IMAGE>