APPARATUS FOR SEALING OFF A PUMP SPACE OF A ROTARY PISTON PUMP AND ROTARY PISTON PUMP HAVING SAME

摘要

The invention relates to a device for sealing a pump chamber of a rotary lobe pump to a fluid-free area of the rotary lobe pump, in particular in a shaft duct area, characterized in that a labyrinth gap is provided between the sealing elements Wherein the labyrinth spacing has at least two sealing elements that can be disposed adjacent to the front side of the rotary piston disposed on the shaft in the pump chamber of the rotary lobe pump, Radially and axially with respect to the shaft. According to the present invention, the sealing land is larger in the radial direction with respect to the shaft than with the sealing lance in the axial direction with respect to the shaft.