METHOD OF MAKING CHEMICAL ELECTRICALLY DRIVEN PUMP UNIT AND CHEMICAL ELECTRICALLY DRIVEN PUMP UNIT THUS MADE Russian patent published in 2014 - IPC F04D29/62 F04D7/02 F04D13/06 F04D29/08 F04D29/22 

FIELD: engines and pumps.

SUBSTANCE: pump composite housing, rotor with shaft and impeller and power drive are produced. Pump running part housing is equipped with bearings. Pump flow section housing has flow section to accommodate impeller and involute collector. Said impeller represents encases multifilar impeller with the main and cover discs. Hydraulic lock composed of independent disc with impeller and circular removable element are arranged behind the main disc. Hydraulic lock impeller radius is smaller than that of impeller. Impeller main disc is equipped with circular ledge. Said ledge makes with impeller hub wall a circular channel communicated with hydraulic lock and, via through bore in main disc, directly with impeller inner surface. Pump is assemble and mounted at pump and drive bearing platform with the help of half-couplings. After assembly, pump unit is tested.

EFFECT: simplified manufacture and assembly, longer life, higher reliability and efficiency.

22 cl, 7 dwg