FIELD: mechanical engineering; radial-flow turbines.
SUBSTANCE: proposed nozzle guide assembly of radial-flow turbine contains nozzle vanes, drive and adjusting device. Nozzle vanes are uniformly spaced around axle of turbine wheel and are installed by trunnions in turbine casing for adjustable turning in channel formed by walls of casing. Adjusting device is made in form of ring turn synchronizer engaging with nozzle vanes through guides secured on their trunnions. Each guide is made in form of bellcrank whose free ends are arranged in radial slots of turn synchronizer. Said turn synchronizer is made in form of two concentric disks, inner and outer ones, interconnected for relative turning, each disk being located by radial slots from free ends of bellcranks pointed to disk.
EFFECT: increased accuracy of synchronous turning of vanes, reduced gas leakage in clearances along end faces of vanes, reduced wear of units caused by high-temperature dry friction.
5 cl, 2 dwg
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