▎ 摘　　要

NOVELTY - The disc has a storage cavity (2) that is set in the shaft disc main housing (1), and a phase-change heat storage material that is set in the storage cavity. The storage cavity is provided with a supporting portion (3). The supporting portion is set along the axial direction of the main housing of the shaft disc. The shaft disc main housing is provided with a filling hole (4). The filling hole is connected with the storage cavity. The filling hole is provided with a plug (5). The filling hole is provided with a graphite sealing pad that is hermetically matched with the plug. The side wall of the storage cavity is sprayed with graphene coating. The phase change heat storage material is solid-liquid phase change material. The phase change heat storage material has nano-particles or graphite powder. USE - Shaft-mounted brake disc mounted in railway vehicle (claimed). ADVANTAGE - The disc realizes the phase change of the phase change heat storage material in the storage cavity, reduces the highest temperature of the brake disc, protects the safety of the shaft disc main housing, and increases the maximum driving speed of a train. DESCRIPTION OF DRAWING(S) - The drawing shows a radial cross-sectional view of a shaft-mounted brake disc. Shaft disc main housing (1) Storage cavity (2) Supporting portion (3) Filling hole (4) Plug (5)