Reduction of co-efficient of friction to reduce stress ratio...

Details Reduction of co-efficient of friction to reduce stress ratio... Reduction of co-efficient of friction to reduce stress ratio...

2007-12-11

2007-12-11

Edgar, Richard A. (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Blade received in well or slot

C416S248000

Reexamination Certificate

active

11046759

ABSTRACT:
A rotor blade, a rotor disc (24) or load bearing assembly having at least one bearing surface (22) for contact with a corresponding bearing surface (28). At least one selected area of the bearing surface (30,32) which, in operation, is an area of alternating stress greater than about 50 MPa (peak to peak), is configured to have a co-efficient of friction lower than the remainder of the bearing surface (34). The selected area (30,32) having a co-efficient of friction lower than the remainder of the bearing surface (34) may be provided by the application of a dry film lubricant, with the remaining area(s) (34) of said bearing surfaces (22) being substantially free of the said coating.

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patent: 0 496 503 (1992-07-01), None
patent: 1 484 475 (2004-12-01), None
patent: WO 95/13191 (1995-05-01), None

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