Exploratory Development for the TECHROLL (Trade Name) Seal Movable Nozzle System. Volume I
Final rept. 15 Mar 1971-30 Mar 1973
UNITED TECHNOLOGY CENTER SUNNYVALE CA
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The seal is a constant-volume, fluid-filled bearing configured with a pair of rolling convolutes that permits omniaxis deflection of a rocket motor nozzle. The fluid-filled bearing is pressurized by nozzle ejection loads and serves as both the movable nozzle seal. The TECHROLL seal is made of a fabric- reinforced elastomeric composite material and does not require complex manufacturing processes or tight tolerances. United Technology Center, under contract to the Air Force Rocket Propulsion Laboratory, has conducted a three- phase exploratory development program for the seal. This report covers only phase I and phase II activities. During these two phases, seal material evaluation was completed, and demonstration motor tests of a high-pressure tactical system movable nozzle and a movable nozzle for a second-stage Minuteman motor were conducted at the Air Force Rocket Propulsion Laboratory. Each movable nozzle system was characterized by bench testing prior to firing. Torques, spring rates, and dynamic response characteristics were identified and later verified during static motor tests. in addition, an analytical model describing seal characteristics was developed. All static motor firings were completely successful and verified the performance predictability and low torque characteristics of the seal.
- Adhesives, Seals and Binders
- Surface-Launched Guided Missiles
- Solid Propellant Rocket Engines