ROTOR ASSEMBLY FOR GAS TURBINE

摘要

The present invention relates to a rotor assembly for a rotary machine such as a gas turbine. The present solution provides a sealing wire located inside a groove engraved in the rotor body. The sealing wire is responsive to radial centrifugal forces acting during normal operation of the machine, and moves radially in the groove until a sealing configuration is achieved such to prevent damaging hot leakage towards machine components.

主权项

1. A rotor assembly for a gas turbine, the rotor assembly comprising:
a rotor body rotatable about an axis a, the rotor body including at least a rotor fir tree portion, configured to receive a correspondent blade fir tree, and a circumferential groove engraved in the rotor body in proximity of said at least one rotor fir tree portion; a lock plate associated to said rotor fir tree portion comprising a lock plate lower portion inserted in said circumferential groove; said groove defining a side wall facing said lock plate lower portion; a sealing wire located within said circumferential groove and in that said side wall; wherein said lock plate defines a convergent passage such that said sealing wire, during operation, is moved by centrifugal forces upwards there along until it contacts said lower portion of the lock plate and said side wall in a sealing configuration.