METHOD OF ELECTRICALLY DRIVEN VERTICAL CHEMICAL PUMP UNIT PRODUCTION AND ELECTRICALLY DRIVE PUMP UNIT THUS MADE (VERSIONS) Russian patent published in 2014 - IPC F04D29/62 F04D7/02 F04D13/08 F04D29/22 F04D29/08 

FIELD: engines and pumps.

SUBSTANCE: proposed method comprises making the pump composite housing of running section housing thrust plate with bearings, suspension case and flow section housing, making the pump rotor shaft, impeller, adapter case and structural assy. Pump is assembled pump assy is mounted and tested. Flow section housing and suspension case are separated by detachable circular ledged rear wall. Pump incorporates enclosed vaned impeller, vanes being made with angular twisting. Active volume of dynamic filling of diffuser vane channels allows ejection of (5.0…1500)×10^-5 m³/vol of pumped fluid into flow section. Impeller disk are protected from outside by hydraulic locks composed by impeller with a set of radial vanes. Impeller vane radius is sufficient for development of hydrodynamic counter pressure to sustain pumped medium head under pump standard operating conditions at 0.25 of vane length from vane near-root point.

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

26 cl, 6 dwg