Mechanical sealing structure of circulating water pump

The utility model relates to the technical field of mechanical sealing, in particular to a mechanical sealing structure of a circulating water pump, which comprises a static ring mounted on a motor output shaft and a movable ring sleeved on a pump shaft, a base is fixedly mounted on the pump shaft, a spring is mounted between the movable ring and the base, and the movable ring and the pump shaft form a friction pair. The end, close to the static ring, of the movable ring is fixedly sleeved with a fixed ring, the middle of the static ring is sleeved with a pulling ring, a plurality of telescopic assemblies are evenly arranged between the fixed ring and the pulling ring in the circumferential direction, one end of each telescopic assembly is detachably connected with the fixed ring, and the other end of each telescopic assembly is detachably connected with the pulling ring. Clamping pieces are arranged at the ends, close to the static ring, of the telescopic assemblies; an abutting assembly is arranged on the s