AUGER PUMP Russian patent published in 2009 - IPC F04D3/02 F04D29/66 F04D13/04 

FIELD: engines and pumps.

SUBSTANCE: invention relates to pump production. The proposed auger pump incorporates the main screw with bushing fitted on the hollow shaft in the pump casing. Aforesaid shaft houses additional shaft with its end, on the main screw inlet side, supporting the hydraulic turbine and additional screw. The additional shaft inside features an axial hole running into the space between hydraulic turbine and additional screw. At least, one intermediate bearing is fitted between the shaft and additional shaft. One or all intermediate bearings can be magnetic.

EFFECT: improved anti-cavitation properties and higher efficiency.

3 cl, 2 dwg