CANTILEVER CENTRIFUGAL PUMPING UNIT Russian patent published in 1998 - IPC

FIELD: mechanical engineering; pumping units. SUBSTANCE: cantilever centrifugal pumping unit consists of centrifugal pump and electric motor. Pump housing is secured to end face bore of bearing support, and impeller is cantilever mounted on front end of shaft installed in bearing of above indicated support. Shaft electric motor is mechanically coupled with rear end of pump shaft through coupling. Part of pump shaft in zone of support arranged in bearings has diameter greater than diameter of electric motor shaft with fitted on coupling member. Coupling member is installed with guaranteed clearance in end face portion of pump shaft rear end. Rear end of pump shaft is made in form of mating coupling member arranged in zone of support surface of rear bearing. Mechanical coupling of electric motor shaft coupling member and end face bore of pumps shaft is provided through intermediate member made in form of solids of revolution and arranged in longitudinal slots of electric motor coupling member and parallel to common axis of shafts and to end face bore of pump shaft. Support has bearing surface common for entire unit. EFFECT: enlarged operating capabilities. 8 cl, 1 dwg