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

摘要

The invention relates to an apparatus for sealing off in particular in the region of a shaft feedthrough a pump space of a rotary piston pump with respect to a fluid free region of the rotary piston pump wherein the apparatus has two or more sealing members which are arrangeable in such a way next to an end side of a rotary piston arranged on the shaft in the pump space of the rotary piston pump that a labyrinth gap extends between the sealing members said labyrinth gap being configured to extend the seal path in relation to the shaft in the radial direction and in the axial direction. According to the invention the seal path in the radial direction in relation to the shaft is longer than the seal path in the axial direction in relation to the shaft.