Turbomachine with mutual braking of concentric shafts

Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – With runner shaft of specific shape or material

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4152171, 415229, 415177, 60 3975, 416244R, F01D 2500

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active

06135712&

ABSTRACT:
A coating (22) with a high coefficient of friction and low thermal conductivity covers a turbomachine low pressure shaft (12) in the vicinity (17) of a concentric high pressure shaft (11), in the area at which high friction contact between the two shafts could occur if a bearing (13) on the low pressure shaft (12) breaks following a failure causing the appearance of an out-of-balance mass. Friction would also more quickly equalize shaft speeds and reduce overheating in them.

REFERENCES:
patent: 3880479 (1975-04-01), De Feo et al.
patent: 4269903 (1981-05-01), Clingman et al.
patent: 4427080 (1984-01-01), Steiger

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