Gas turbine engine and shaft

Details Gas turbine engine and shaft Gas turbine engine and shaft

1982-10-22

1984-10-09

Hershkovitz, Abraham

Fluid reaction surfaces (i.e., impellers)

Specific drive or transmission means

Hand mixers

415140, 415107, 384425, 416 2, F01D 502

Patent

active

044758693

ABSTRACT:
The front fan of a ducted fan gas turbine engine is connected to the low pressure turbine of the gas generator by a shaft so as to be driven thereby. If the shaft breaks, air loads on the fan tend to pull it from the engine. It is known to provide a fail/safe shaft over and above the normal shaft which is retained at one end by some means and has a flange on its upstream end, to retain the fan via its disc. The invention obviates the heavy and expensive fail/safe shaft and substitutes a first annular shoulder 40 on the inner race of the fan bearing 20 and a further shoulder 42 on fixed structure 38. If the fan attempts to exit the engine, the two shoulders 40, 42 engage and so retain the fan.

REFERENCES:
patent: 3225698 (1965-12-01), Spisiak
patent: 4073731 (1978-02-01), Fanta
patent: 4201426 (1980-05-01), Garten et al.
patent: 4201513 (1980-05-01), Sales

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