Research on the friction pair of the space high-power and long-life rolling ring

Abstract

Abstract With the development of spacecraft, the requirement for high-power, long-life and high-reliability electrical transmission technology of the rolling ring is increasingly urgent. Aiming at the friction pair’s structure of the rolling ring, relevant theoretical and experimental research was carried out. The kinematic model is established to determine the friction pair’s structure of the rolling ring, and the zero sliding of friction pair is verified by ADAMS simulation. The electrical contact resistance and fatigue life of the friction pair are theoretically analyzed, and the cycling life of the flexure was analyzed. The stress distribution of flexure during rolling was simulated by FEM. The lifetime experiment of 1.5 × 105 r that the prototype transmitted the 6.6 kW of single loop was verified. The experimental result shows that the electrical contact resistance and the fluctuation value of the single loop are less than 1m Ω during the rolling, although the transmission power increased to 10 times as compared with the traditional slip ring. The kinematic model can provide a certain theoretical reference for design of the space high-power and long-life rolling ring.