Axial rotating motive sealing structure of medium-concentration pump

The utility model provides an axial rotating motive sealing structure of a medium-concentration pump. A lip-shaped sealing ring locating box is arranged at the rear end of a rear pump cover. Two polytetrafluoroethylene lip-shaped sealing rings are arranged in an inner hole of the locating box. A spacer sleeve is arranged between the two lip-shaped sealing rings so that a certain gap can be guaranteed and can serve as storage space of a liquid lubricating agent. The liquid lubricating agent enters the storage space through a through hole in the locating box. A shaft sleeve is arranged on a main shaft. An axial motive sealing face is formed between each lip-shaped sealing ring and the external circle of the shaft sleeve. The rear pump cover and the lip-shaped sealing ring locating box can be of an integrated structure and a split structure. When the rear pump cover and the lip-shaped sealing ring locating box are of the split structure, the lip-shaped sealing ring locating box is installed on the rear pump cove