Rotor drive systems

Details Rotor drive systems Rotor drive systems

1981-06-29

1984-06-05

Croyle, Carlton R.

Fluid reaction surfaces (i.e., impellers)

Having frangible or fusible part or connection

416170R, 416204A, 415 9, 602261, F01D 502

Patent

active

044525672

ABSTRACT:
A fan drive system comprising a main drive shaft 13 which drives the fan through a frangible coupling 27 and an auxilliary drive shaft 30 which by-passes the coupling 27. The auxilliary shaft 30 is pre-twisted elastically in the opposite direction to the direction of rotation of the main shaft 13, and is held in the pre-twisted state by the coupling 27. When the coupling 27 disconnects the drive from the main shaft 13, for example when the fan becomes unbalanced and transverse loads exceed a predetermined magnitude, the auxilliary shaft 30 unwinds. Unwinding of the shaft 30 cushions the fan against suddenly applied loads when the coupling 27 breaks and also reduces the loads on the coupling 27 during normal balanced running.

REFERENCES:
patent: 3399549 (1968-09-01), Nagele
patent: 3466895 (1969-09-01), Cartwright
patent: 3727998 (1973-04-01), Haworth et al.
patent: 3914067 (1975-11-01), Leto
patent: 3938398 (1976-02-01), Bloom et al.
patent: 4127080 (1978-11-01), Lakiza et al.
patent: 4193741 (1980-03-01), Briggs
patent: 4201513 (1980-05-01), Sales

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