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US 6,296,440 B1Granted
Side channel centrifugal pump
AssigneeSterling Fluid Systems (Germany) GmbH
InventorPeter Fandrey
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AssigneeSterling Fluid Systems (Germany) GmbH
InventorPeter Fandrey
Estimating the term…
The invention relates to a side channel centrifugal pump with a housing forming a side channel (1). The housing surface adjacent to the side channel forms a front face (13) adjoining the impeller. The transition edge (2, 3, 7) between the side channel (1) and the front face (13) is rounded in the areas where it deviates from the circumferential direction. In the front plane, the blades (16) of the impeller have a predetermined web width in the circumferential direction. According to the invention, the radius (15) of the transition edge (7) is greater than 0.25 (sec/m) times the product of web width×blade speed where the impeller blades (16) exit from the front face (13, 14) and overlap into the area of the side channel (1). This reduces cavitation tilting and noise.
Side-channel centrifugal pump having a housing which forms a side channel (1) and whose surface which is adjacent to the side channel (1) forms a front face (13) which is contiguous to the impeller except for a narrow gap, the transition edge (2, 3, 7) from the side channel (1) to the front face (13) being rounded in those regions where it deviates from the circumferential direction, and having an impeller whose vanes (16) have a predetermined web width in the circumferential direction in the front plane of the impeller, characterized in that the radius (15) of the transition edge (7) in the region where the vanes (16) of the impeller emerge from the region of the front face (13, 14) and pass into the region of the side channel (1) is greater than 0.25 sec/m times the product of the web width and vane speed.
Dependencies are inferred from the claim text.