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기술보고서

기술보고서 게시판 내용
타이틀	An Experimental Investigation of Leak Rate Performance of a Subscale Candidate Elastomer Docking Space Seal
저자	Garafolo, Nicholas G.;; Daniels, Christopher C.
Keyword	DOCKING;; ELASTOMERS;; HEIGHT;; LEAKAGE;; PRODUCT DEVELOPMENT;; SEALS (STOPPERS); SILICONES;; VACUUM
URL	http://hdl.handle.net/2060/20110023745
보고서번호	NASA/CR-2011-216829
발행년도	2011
출처	NTRS (NASA Technical Report Server)
ABSTRACT	A novel docking seal was developed for the main interface seal of NASA''s Low Impact Docking System (LIDS). This interface seal was designed to maintain acceptable leak rates while being exposed to the harsh environmental conditions of outer space. In this experimental evaluation, a candidate docking seal assembly called Engineering Development Unit (EDU58) was characterized and evaluated against the Constellation Project leak rate requirement. The EDU58 candidate seal assembly was manufactured from silicone elastomer S0383-70 vacuum molded in a metal retainer ring. Four seal designs were considered with unique characteristic heights. The leak rate performance was characterized through a mass point leak rate method by monitoring gas properties within an internal control volume. The leakage performance of the seals were described herein at representative docking temperatures of -50, +23, and +50 C for all four seal designs. Leak performance was also characterized at 100, 74, and 48 percent of full closure. For all conditions considered, the candidate seal assemblies met the Constellation Project leak rate requirement.