TURBINE Russian patent published in 2012 - IPC F01D9/04 F01D25/24 

FIELD: machine building.

SUBSTANCE: turbine comprises nozzle assembly including, at least, one aerofoil, inner sidewall, outer side wall, and casing with groove open radially inward. Front contact area between outer sidewall and casing comprises front peripheral seat made on groove surface directed rearward, adjoining groove outer radial end wall. Front peripheral seat has axial surface arranged in radial plane, at rear and radial distance from remaining groove upstream surface directed rearward. Said front peripheral seat feature radial size, in fact, smaller than that of groove. Rear contact area between outer sidewall and casing comprises rear peripheral seat arranged on one of groove downstream surfaces directed forward and located downstream of axial surface of outer side wall. Rear peripheral seat is arranged radially adjacent to groove inner section remote from groove radially outer end wall. Said rear peripheral seat feature radial size, in fact, smaller than that of groove. Rear peripheral seat is arranged on downstream sidewall outer axial surface.

EFFECT: simplified assembly and disassembly.

9 cl, 6 dwg