MODULAR CENTRIFUGAL PUMP Russian patent published in 2009 - IPC F04D13/10 F04D29/41 

FIELD: engines and pumps.

SUBSTANCE: proposed pump comprises pump modules 1 with shafts 4 running in axial bearings consisting of bearing 10 and sliding thrust bearing 11. Compression-assembly modular sections have bearing 10 screwed on threaded sleeve 7 locked on shaft 4 and spring-loaded by retainer 12. The latter represents a sleeve with ledges arranged on its both sides. Aforesaid threaded sleeve 7 and sliding thrust bearing 10 have slots to receive the said ledges. Proposed invention aims at allowing simultaneous contact of bearing 10 with sliding thrust bearing 11, not that between thrust washers14 of impellers 2 with stage guide vanes 3.

EFFECT: higher efficiency.

2 cl, 3 dwg