Pump shaft sealing element

The utility model discloses a pump shaft sealing element which comprises a movable ring, a static ring and a spring, the movable ring is sleeved on a pump shaft, the spring is used for pressing the movable ring on the static ring, the movable ring comprises a movable ring seat, a friction ring and a sealing ring, the friction ring is arranged on the movable ring seat, and the sealing ring is clamped between the movable ring seat and the pump shaft. The static ring comprises a static ring base and a static ring body installed on the static ring base, the inner circumferential face of the friction ring is tightly attached to the outer circumferential face of the pump shaft, and the heat insulation ring is arranged between the sealing ring and the friction ring in a clamped mode. Heat transfer from the friction ring to the sealing ring can be weakened, so that the sealing ring is prevented from losing efficacy due to high temperature, and the service life of a sealing piece is prolonged. 本实用新型公开了一种泵轴密封件，包括套设在泵轴上