| 摘要 |
The invention relates to a rotary piston pump for one-time use made of plastic for screwing onto a fastening nozzle on a tubular bag, having two rotors (10), which are coupled to each other via gear wheels (11) and which can be driven in opposition and which are mounted in a pump housing (5), which has suction nozzles (6) and outlet nozzles (7), wherein each rotor (10) has a rotor shaft (12), the rotor shaft ends (15) thereof being mounted in the walls (8, 4) of the pump housing (5), and the gear wheels are integrally molded to the rotor shafts, and wherein each rotor (10) has two rotor wing walls (13) arranged diametrically on the rotor shaft (12) which flare continuously outward and to each of the peripheral ends of which a partially cylindrical rotor wing shoe (14) is molded, wherein the rotor wing shoes (14) contact the cylindrical inside wall regions of the pump housing (5), on one side, and the rotor wing shafts (13) of the adjacent rotor (10) on the other, in a sliding and sealing matter, wherein seals are integrally molded on the rotor, wherein the seals serve to prevent the effects of air admission onto the content located in the tubular bag to as great an extent as possible. |
