FIELD: engine building.
SUBSTANCE: invention relates to a device for guiding an element, such as a spark plug or a fuel nozzle, located in a hole or near a hole of a wall of a combustion chamber of a gas-turbine engine. The device for guiding element (44) in hole (460) of a wall of combustion chamber (10) of a gas-turbine engine contains essentially coaxial floating ring (500) and flange (520), installed one in the other, while ring (500) is made with the possibility of passage of the element in axial direction (520a), and it contains outer side (600) transversely guided in inner annular groove (620) of flange (520) made with the possibility of attachment on an edge of hole (460) of the wall of combustion chamber (10), while flange (520) contains bushing (640) equipped with flanged edge (740), through which the bushing is attached, by soldering or welding, to cuff (660) to form specified groove (620) between them, while the device has at least one priority transverse direction (X1, X2) of movement of the ring. Intermediate space (881) is left in the continuation of specified groove (620), in parallel to specified axis (520a), between welded joints or soldered joints (800) and trajectory (600a) of the side of ring (500), when the ring is moved relatively to the bushing in the priority direction. Specified welded joints or soldered joints float (780) into intermediate space (881), so that welded joints or soldered joints (800) are outside the specified trajectory of the side of the ring, and specified intermediate space (881) passes around part (665) of cuff (660) transversely to specified axis (520a) between specified part (665) of the cuff and flanged edge (740).
EFFECT: invention allows for an increase in operational reliability.
6 cl, 4 dwg
