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High-Temperature Polyimide Hydraulic Actuator Rod Seals for Advanced Aircraft
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English
Abstract
This paper summarizes the results and findings of a program to design, develop, and evaluate actuator rod seals for use in advanced aircraft high-temperature hydraulic systems. The rod seals are intended to function efficiently and reliably for 3000 hr in the temperature range of -40-500 F. Preliminary studies of various material and design combinations showed that a polyimide low-pressure second-stage V-seal in a two-stage configuration had the greatest potential in long-term duty cycle testing in a simulated actuator test system. Modifications of this seal that provided for improved fatigue life and more efficient loading met the test objectives of 20 X 106 short-stroke cycles of operation at 500 F. Severity of this testing was equivalent to 3000 hr of duty cycle operation. The validity of design techniques used to achieve performance goals was shown.
Authors
Citation
Loomis, W., Johnson, R., and Lee, J., "High-Temperature Polyimide Hydraulic Actuator Rod Seals for Advanced Aircraft," SAE Technical Paper 700790, 1970, https://doi.org/10.4271/700790.Also In
References
- Williams R. E. “A New Look at Supersonic Aircraft Hydraulic Requirements,” Paper 691-C, SAE-ASNE, National Aero-Nautical Meeting Washington, D. C. April 8-11 1963
- Lee J. “High-Temperature Hydraulic System Actuator Seals for Use in Advanced Supersonic Aircraft,” Fairchild Hiller Corp., Republic Aviation Div. September 15 1967
- Lee J. “High-Temperature and Fluid-Resistant Seal and Sealant Materials for the Supersonic Transport,” Republic Aviation Corp., Air Force Materials Laboratory Report ML-TDR-64-266 1964
- Lee J. “Development of High-Temperature Polyimide Rod Seals,” Final Report FHR 3612-1, Fairchild Hiller Corp., Republic Aviation Div. (NASA CR-72563) August 21 1969
- Buckley D. H. “Friction and Wear Characteristics of Polyimide and Filled Polyimide Compositions in Vacuum (10 -10 mm Hg),” NASA TN D-3261 1966