NONHERMETIC SEALING DEVICE Russian patent published in 2007 - IPC F01D11/00 F16J15/16 

FIELD: mechanical engineering; gas turbine.

SUBSTANCE: device for nonhermetic sealing of space between stator and rotor of gas turbine contains brush sealing ring arranged in zone of roots of stator guide vanes and secured on roots by means of spoke centering appliance. Said appliance contains guide member located on brush sealing ring or on roots of guide vanes and engaging, respectively, with roots of guide vanes or with brush sealing ring. Spoke centering appliance provides free relative displacement of guide vanes and brush sealing ring in radial direction. Support ring is installed from side of lower pressure with radial recede from rotating sealing surface. Support ring is made integral with roots of guide vanes and it forms axial sealing support for bristle. Said ring consists of segments and it is provided with clearance in butt joints of separate segments which are found also in guide vanes, in segments of guide vanes in joints in between. Spoke centering appliance is made penetrable to pressure, thanks to it brush sealing ring is not loaded by pressure in axial direction excluding section of bristle passing in radial direction from sealing surface to support ring.

EFFECT: improved reliability of sealing owing to reduction of friction and wear of brush sealing ring and reduced leakage on section of its axial support surface.

7 cl, 9 dwg