Power plants – Combustion products used as motive fluid – Combined with regulation of power output feature
Patent
1990-09-12
1992-05-26
Bertsch, Richard A.
Power plants
Combustion products used as motive fluid
Combined with regulation of power output feature
415118, F02G 100
Patent
active
051156369
ABSTRACT:
A borescope sealing apparatus and plug includes semi-spherical sealing surfaces on the plug's sealing end and a conical hole sealing seat to receive the sealing end. The invention provides good sealing during engine operation wherein thermal growth causes misalignment of the borescope holes. The borescope plug further includes an axial shaft and a spring loaded end having a spring means which is operable to bias the sealing end into the sealing seat. The spring means suggested are crest to crest wave spring, coiled spring, and a pressurized bellows. The sealing apparatus and borescope plug is particularly useful for sealing borescope holes in double wall casings such as those found in gas turbine engines.
REFERENCES:
patent: 3362160 (1968-01-01), Bourgeois
patent: 3936217 (1976-02-01), Travaglini et al.
patent: 4300774 (1981-11-01), Hollis et al.
patent: 4406580 (1983-09-01), Baran, Jr.
patent: 4470735 (1984-09-01), Salisbury
patent: 4815276 (1989-03-01), Hansel et al.
Dover AGE19009 Proprietary Borescope Plug Proposal Dover Corporation/Cook Airtomic Division By: Luis A. Camacho, Project Engineer, May 16, 1986.
Bertsch Richard A.
General Electric Company
Kocharov Michael I.
Narciso David L.
Squillaro Jerome C.
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