FIELD: engines and pumps.
SUBSTANCE: invention relates to gas turbine engines, particularly, to small-sized impeller. Impeller comprises disc made integral with vanes and shroud ring arranged at periphery of vanes and wire damper. Said shroud ring has axial or inclined cut-outs with chambers made at their inner surfaces to make axial or inclined grooves. Ring grooves whereat wide damper is fitted are arranged in shroud ring edges, on its inner surface. Wire damper is laid in zigzag manner. Wire damper is fitted in ring groove on shroud ring side within the limits of shroud ring sector between adjacent cut-outs. In cut-out zone wire damper is laid along axial or inclined groove and, then, into ring groove of shroud ring adjacent sector on ring opposite side.
EFFECT: higher efficiency of impeller without decrease in turbomachine gas-dynamic efficiency.
5 dwg
