Design of mechanical components for long-term performanceReview of the results of a NASA program designed to study advanced techniques for determining the long-term performance of rocket engine components. Aging and operational degradation mechanisms of metal valve seats are identified. Characterization of metal valve seat surfaces by optical signature analysis is described. The results of the development of a long-life 'zero leakage' metal valve seal designed to avoid failure by contamination, stress/strain, fatigue, and the deterioration of the surface by wear is reported. An analysis of a specific seat design showed that material strain prevention along all axes would prevent these failures. The design provided for refurbishment of the sealing surfaces during each valve cycle, thereby preventing cumulative surface damage.
Document ID
19750032543
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Salvinski, R. J. (TRW Systems Group Redondo Beach, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1974
Subject Category
Quality Assurance And Reliability
Meeting Information
Meeting: Management and design of long-life systems; Symposium