Side-Channel Pump

Abstract

A side-channel pump for pumping a medium by means of an impeller having a ring of rotor chambers, comprising pockets in a radially outer region delimited by the rotor chambers. The pockets are filled by means of leakage with the medium to be pumped and create an axial force on the impeller. Therefore, the impeller is reliably held in the side-channel pump.

1 .- 7 . (canceled) 
   
   
       8 . A side-channel pump for pumping a medium comprising:
 a housing;   an inlet channel arranged in the housing;   an outlet channel arranged in the housing;   an impeller rotatably mounted in the housing;   at least one ring of rotor chambers arranged in one of the end faces of the impeller;   at least one partially annular channel arranged in the housing, the at least one partially annual channel having an edge arranged radially beyond the at least one ring of the rotor chambers;   a housing section of the housing located at a location extending radially from at the inlet channel and the outlet channel, the housing section configured to have an annular gap arranged between an edge the impeller and the section of the housing; and   the annular gap defining at least one pocket configured to receive the pumped medium, the at least one pocket formed by an increase in a distance between the edge of the impeller and the section of the pump housing located opposite thereto.   
   
   
       9 . The side-channel pump as claimed in  claim 8 , wherein a plurality of pockets are distributed over the circumference of the annular gap and spaced a distance from one another. 
   
   
       10 . The side-channel pump as claimed in  claim 9 , wherein the circumferential distance between adjacent pockets is at least equal to circumferential a length of one of the plural pockets pocket. 
   
   
       11 . The side-channel pump as claimed in  claim 9 , wherein the pockets are arranged in the end faces of the impeller. 
   
   
       12 . The side-channel pump as claimed in  claim 8 , wherein the at least one pocket extends from the edge of the impeller to beyond a radial boundary of the impeller. 
   
   
       13 . The side-channel pump as claimed in  claim 8 , wherein at least one the pocket is configured as a recess in the impeller. 
   
   
       14 . The side-channel pump as claimed in  claim 8 , wherein the at least one is configured as a recess in the pump housing. 
   
   
       15 . A side-channel pump comprising:
 a housing;   at least one rotor chamber arranged in the housing;   an impeller rotatably mounted in the housing, the impeller having an outer radial end and first and second radially extending edges;   a first channel between the outer radial end of the impeller and the housing;   a second channel between the first radially extending edge of the impeller and the housing;   a third channel between the second radially extending edge of the impeller and the housing;   at least one pocket arranged at a location radial beyond the at least one rotor chamber, the at least one pocket configured as a widening of a portion of at least one of the first and second channels.   
   
   
       16 . The side-channel pump as claimed in  claim 15 , wherein the at least one pocket is formed by a recess in the housing. 
   
   
       17 . The side-channel pump as claimed in  claim 15 , wherein the at least one pocket is formed by a recess in the impeller. 
   
   
       18 . The side-channel pump as claimed in  claim 16 , wherein the at least one pocket extends radially beyond the outer radial end of the impeller. 
   
   
       19 . The side-channel pump as claimed in  claim 15 , further comprising a plurality of pockets, the plural pockets spaced a distance from one another. 
   
   
       20 . The side-channel pump as claimed in  claim 19 , wherein the distance is at least equal to a length of one of the plural pockets.