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Testing of reciprocating seals for application in a Stirling cycle engineSix single stage reciprocating seal configurations to the requirements of the Stirling cycle engine were evaluated. The seals tested were: the Boeing Footseal, NASA Chevron polyimide seal, Bell seal, Quad seal, Tetraseal, and Dynabak seal. None of these seal configurations met the leakage goals of .002 cc/sec at helium gas pressure of 1.22 x 10 to the 7th power PA, rod speed of 7.19 m/sec peak, and seal environmental temperature of 408 K for 1500 hours. Most seals failed due to high temperatures. Catastrophic failures were observed for a minimum number of test runs characterized by extremely high leakage rates and large temperature rises. The Bell seal attained 63 hours of run time at significantly lowered test conditions.
Document ID
19800014212
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Curulla, J. F.
(Boeing Commercial Airplane Co. Seattle, WA, United States)
Beck, T. L.
(Boeing Commercial Airplane Co. Seattle, WA, United States)
Date Acquired
September 4, 2013
Publication Date
February 1, 1980
Subject Category
Mechanical Engineering
Report/Patent Number
NASA-CR-159820
DOE/NASA/0612-80/1
BCAC-D6-48915
Accession Number
80N22700
Funding Number(s)
CONTRACT_GRANT: NAS3-20612
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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