Multi-cavity shaft system particle damper

The invention discloses a multi-cavity shaft system particle damper and relates to a shaft system of a power device. A cylinder is arranged, and at least two axial cavities are formed in the cylinder. A fixed cover plate is arranged at the opened ends of the axial cavities, and the axial cavities are filled with particles. An end cover is arranged at the front end of the fixed cover plate, shafts matched and connected to the axial cavities are arranged at the back end of the fixed cover plate, a connecting part is arranged between the end cover and the shafts, and an external thread is arranged in the connecting part. An original single shaft hole is separated into a plurality of cavities, and each cavity is filled with particles. As the positions of the particles after modification are balanced relative to the centroids, the dynamic unbalance phenomenon of the particle damper is greatly reduced, so that generation of extra work is not caused or a small part of extra work is generated, and the vibration and noise reduction stability of the particle damper is enhanced. Vibration and noise generated when the shaft system operates are reduced, and meanwhile, extra work generated by dynamic unbalance is reduced, and the vibration and noise reduction stability of the particle damper is improved.