초록 ▼

A gas turbine nozzle guide vane assembly is formed of individual arcuate nozzle segments. The arcuate nozzle segments are elastically joined to each other to form a complete ring, with edges abutted to prevent leakage. The resultant nozzle ring is included within the overall gas turbine stationary s

A gas turbine nozzle guide vane assembly is formed of individual arcuate nozzle segments. The arcuate nozzle segments are elastically joined to each other to form a complete ring, with edges abutted to prevent leakage. The resultant nozzle ring is included within the overall gas turbine stationary structure and secured by a mounting arrangement which permits relative radial movement at both the inner and outer mountings. A spline-type outer mounting provides circumferential retention. A complete rigid nozzle ring with freedom to “float”radially results. Specific structures are disclosed for the inner and outer mounting arrangements. A specific tie-rod structure is also disclosed for elastically joining the individual nozzle segments. Also disclosed is a method of assembling the nozzle ring subassembly-by-subassembly into a gas turbine employing temporary jacks.

대표청구항 ▼

A nozzle guide vane assembly for a gas turbine engine, said assembly comprising: a plurality of arcuate nozzle segments elastically joined to each other and forming an annular nozzle ring, each of said nozzle segments including a vane extending between a nozzle segment inner endwall and a nozzle seg

A nozzle guide vane assembly for a gas turbine engine, said assembly comprising: a plurality of arcuate nozzle segments elastically joined to each other and forming an annular nozzle ring, each of said nozzle segments including a vane extending between a nozzle segment inner endwall and a nozzle segment outer endwall, the inner and outer endwalls of each nozzle segment having a pair of generally circumferentially-facing edges abutting respective corresponding circumferentially-facing endwall edges of adjacent nozzle segments in sealing relationship to form continuous inner and outer endwall rings; inner and outer support structures for said nozzle ring; an inner mounting arrangement mounting said inner endwall ring to said inner support structure, said inner mounting arrangement including means for providing axial retention and for permitting at least free relative radial movement; an outer mounting arrangement mounting said outer endwall ring to said outer support structure, said outer mounting arrangement including means for permitting at least free relative radial movement; at least one of said inner and outer mounting arrangements also including means for providing circumferential retention; each abutting pair of said circumferentially-facing edges including a compressible seal therebetween; means for applying a compressing force to each of said abutting pairs whereby said compressible seal is compressed to form an effective seal between said abutting pairs; said means for applying a compressing force including each of said nozzle segments including a flange projecting radially outwardly from said outer endwall adjacent each of said generally circumferentially-facing endwall edges, each of said flanges having a front surface generally parallel to the adjacent endwall edge and abutting a corresponding flange front surface of an adjacent nozzle segment, and each of said flanges having a rear surface, and a generally circumferentially-extending aperture formed in each of said flanges in alignment with a corresponding aperture in the adjacent nozzle segment flange; and a tie rod extending through said corresponding apertures of each pair of corresponding flanges with extending portions of each tie rod extending away from said corresponding flange rear surface, a pair of sleeves surrounding said extending portions on respective sides of each pair of corresponding flanges with one end of each sleeve bearing against a flange rear surface, and an enlarged portion on each tie rod end bearing against the other end of each sleeve to place said tie rods in tension and said sleeves in compression.