Simulation analysis of dynamic behavior and sealing performance of friction pair in aviation valve stem
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Abstract
As the core control component of aircraft hydraulic, fuel, environmental-control and electro-hydraulic actuation systems, the dynamic stability and sealing reliability of the aviation valve-stem friction pair directly affect flight safety, service life, and the reliability of airborne electromagnetic equipment that depends on stable fluid control. To address friction, wear, jamming, and leakage failures under high temperature, high pressure, strong vibration, and wide temperature variation, this paper takes the stem-packing sealing friction pair of a typical aviation globe valve as the research object. Contact mechanics, tribology, and multi-physics coupling theory are integrated to construct a dynamic analysis model of the friction pair and a numerical simulation model of sealing performance. The model describes contact stress, friction-force fluctuation, micro-clearance evolution, and leakage behavior under coupled thermal, mechanical, flow, and vibration fields. The results provide an engineering basis for optimizing pre-tightening force, material matching, and sealing structure of aviation valves, and offer a reliable simulation method for high-performance valves used in aerospace hydraulic control and electromagnetic actuation environments.
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