| 摘要 |
A blade assembly ( 10 ) for a turbine ( 16 ) including a vibration damper ( 12 ) having a mounting base ( 38 ) sealingly disposed at an inlet end ( 24 ) of a cooling fluid passageway ( 22 ) within the root section ( 20 ) of the blade assembly and including an opening ( 40 ) in the mounting base for passing cooling fluid into the cooling passageway. The opening is sized to function effectively as an orifice for limiting a maximum flow rate of cooling fluid in the event of a breach of the cooling fluid passageway downstream of the inlet end. A wear feature ( 34 ) is formed on the distal end of the vibration damper opposed the mounting base for rubbing interface with a complementary wear feature attached to a wall ( 26 ) of the cooling fluid passageway. The wear feature may include a non-planar wear surface such as angularly disposed wear surfaces ( 58, 60 ) effective to resist vibrational movement in two directions.
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