| 摘要 |
1508536 Centrifugal pumps SWF-SPEZIALFABRIK FUR AUTOZUBEHOR GUSTAV RAU GmbH 24 Aug 1976 [30 Aug 1975] 35204/76 Heading F1C A fuel pump for an automotive vehicle comprises, in a casing, an electric motor driving at least two impellers in separate pump chambers, the motor rotor and the impellers being secured to a common driving shaft, the thus formed pump stages being connected in series and/or in parallel, and the fuel passing through the motor to a discharge pipe. The submersible fuel pump shown comprises a cylindrical casing 25 containing a permanent-magnet motor 12, 15 and two centrifugal pump stages, the first-stage impeller 36 being located in a chamber comprising an inlet portion 32 and a rear portion 30 and defining a volute 39, the second-stage impeller being similarly located in chamber portions 29, 27 defining a volute 38. After passing through the motor, the pumped fuel is discharged at 24. |
