Side-channel pump

Abstract

The invention relates to a side-channel pump for transporting fuel in a motor vehicle. Said pump comprises a partial annular channel ( 11 ) located in housing sections ( 4, 5 ), said channel having a greater radius than a crown of vane chambers ( 10 ) that are located in the impeller ( 6 ). The vane chambers ( 10 ) and the partial annular channel ( 11 ) respectively have the same width. This prevents wear and tear to the sealing surfaces.

1 . A side-channel pump which is provided, in particular, for the conveyance of fuel in a motor vehicle, with a rotor rotating in a pump casing, with a ring of blade chambers which is arranged in one end face of the rotor, and with a part-annular channel arranged opposite the ring in the casing and extending from an inlet to an outlet, characterized in that the external boundary of the part-annular channel ( 11 ) has a larger diameter than the external boundary of the ring of blade chambers ( 10 ).  
   
   
       2 . The side-channel pump as claimed in  claim 1 , characterized in that the internal boundary of the part-annular channel ( 11 ) has a larger diameter than the internal boundary of the ring of blade chambers ( 10 ).  
   
   
       3 . The side-channel pump as claimed in  claim 1  or  2 , characterized in that the part-annular channel ( 11 ) and the blade chambers ( 10 ) have in each case the same width, and in that the radius R1 from the axis of rotation of the rotor ( 6 ) to the part-annular channel ( 11 ) exceeds the radius (R2) of the ring of blade chambers ( 10 ) by 0.1−1.5 mm.