Turbine overspeed limiter for turbomachines

Details Turbine overspeed limiter for turbomachines Turbine overspeed limiter for turbomachines

1983-10-06

1985-03-12

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

With safety device

415 9, F02G 300, F01B 2516, F01D 2100

Patent

active

045036675

ABSTRACT:
A turbine rotor 14 of a gas turbine engine is provided with a mechanism 25 designed to tilt into the path of the turbine rotor blades to decelerate the rotor if a shaft 24, which connects the turbine rotor 14 to a compressor rotor 12 breaks. The mechanism 25 comprises a segmented stator vane assembly 26 in which the segments are supported at an upstream region of their radial inner ends on a deflectable strut 44 and by means of a tie 46 at a downstream region of their radial inner ends. When the shaft 24 breaks, the rearward movement of the rotor 14 is used to unlatch the strut 44 causing the NGV segments 26 to collapse inwards and tilt forwards into the path of the turbine rotor blades to decelerate the rotor. The NGV segments 26 and the turbine rotor blades destroy each other and the resulting debris is ejected out of the jet pipe 22 destroying further downstream turbine stages.

REFERENCES:
patent: 1634897 (1927-07-01), Davis
patent: 2976012 (1961-03-01), Allen
patent: 3075741 (1963-01-01), Laubin
patent: 3490748 (1970-01-01), Hoffman
patent: 3989407 (1976-11-01), Cunningham
patent: 4004860 (1977-01-01), Gee

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