Research on Seal Performance of Civil Aircraft Landing Gear Shock Absorbing System

The damping of the landing gear is mainly provided by the oil in the shock strut, and the sealing device is an core component to guarantee the oil seal in [1]. In this paper, based on the sealing device of a typical civil aircraft shock strut, a sealing performance analysis model is established. The numerical simulation analysis method is adopted to study the contact pressure change caused by the extrusion deformation of the sealing ring, which is assisted by the simulation test, the leakage mechanism of the sealing device, and the influence of the boundary conditions on the sealing performance is also under investigation to provide theoretical support the optimization design.