Device for sealing a pump chamber of a rotary lobe pump, and rotary lobe pump with selbiger

摘要

Device (10, 10 ', 10' ') for sealing, in particular in the region of a shaft passage, a pumping space of a rotary piston pump (1) with respect to a fluid-free region of the rotary piston pump (1), with two or more sealing members (13, 13', 13 ' ', 19, 23, 25) which can be arranged adjacent to an end face of a rotary piston (5) arranged on the shaft (11) in the pumping space of the rotary piston pump (1) in such a way that between the sealing members (13, 13', 13 ', 19, 23, 25) extends a labyrinth gap, which is arranged for Dichtwegverlängerung relative to the shaft (11) in the radial direction and in the axial direction, characterized in that the sealing path in the radial direction relative to the shaft (11) larger is as the sealing path in the axial direction relative to the shaft (11).