Shaft end sealing ring for packing expanding agent

The shaft end sealing ring comprises a soft sealing ring body, the radial outer side face of the sealing ring body is an outer sealing face, the radial inner side of the sealing ring body is provided with a pressed face, the face, close to an inserting pipe, of the sealing ring body is a shaft end face, and the shaft end face is attached to the end face of the inserting pipe. The sealing ring body is provided with a connecting part, the sealing ring body is detachably arranged on the inserting pipe through the connecting part, the pressed surface is provided with an inner ring groove, an expanding agent is arranged in the inner ring groove, the inner ring groove is provided with a sealing partition plate, the sealing partition plate is used for sealing the inner ring groove, and when the expanding agent does not expand, the sealing partition plate is used for sealing the inner ring groove. The outer diameter of the sealing ring body is smaller than or equal to the outer diameter of the inserting pipe. A foami