STAGE OF CENTRIFUGAL WELL PUMP Russian patent published in 2014 - IPC F04D13/10 F04D29/44 F04D29/02 

FIELD: engines and pumps.

SUBSTANCE: pump stage comprises an impeller with a hub and a guide vane made of a sleeve, an upper disc with an axial support, a lower disc and blades. The upper disc of the guide vane with the axial support are made as solid with the sleeve from polymer materials, besides, the sleeve and the upper disc of the guide vane are made as reinforced with a perforated metal frame arranged inside them, providing for stiffness of the sleeve and strength of sleeve connection with the upper disc of the guide vane. All coupled pairs of pump friction are made as "polymer-metal" friction pairs. The lower disc and the blades of the guide vane, as well as the impeller are made of polymer materials, and the metal of the frame is stainless or alloyed steel. The polymer material is represented by compositions based on polyphenylene sulfide.

EFFECT: improved design.

14 cl, 41 dwg