Pump shaft sealing structure

The utility model provides a pump shaft sealing structure, which belongs to the technical field of pump shaft sealing and comprises a connecting component, a sealing sleeve, a flexible filler sleeve and a locking mechanism. The connecting assembly comprises a fixing sleeve and a packing pressing ring. A sealing cavity is defined by the sealing sleeve, the connecting assembly and the pump shaft, and an external terminal is arranged on the sealing sleeve and used for monitoring the pressure and temperature in the sealing cavity. A filler pipe is further arranged on the sealing sleeve; the locking mechanism comprises a connecting piece and a telescopic driving piece, the connecting piece is connected with the fixing sleeve, and the telescopic driving piece is connected with the filler pressing ring; the flexible packing sleeve is arranged in the sealing cavity, and liquid packing is arranged in the flexible packing sleeve. According to the pump shaft sealing structure provided by the utility model, the pump shaf