CENTRIFUGAL PUMP FOR PUMPING OF LIQUID WITH ABRASIVE INCLUSIONS Russian patent published in 2013 - IPC F04D7/04 F04D29/06 

FIELD: engines and pumps.

SUBSTANCE: pump includes sliding bearings (B), the working cavities of which are hydraulically connected to the pump outlet through a device for cleaning of liquid from abrasive inclusions. The device is installed in an outlet branch pipe across the flow. Some part of the device is made in the form of a shaped part (SP) having the form of a wedge in cross section. A narrow end of SP faces incoming flow. Symmetry plane of SP cross section coincides with a liquid velocity vector at the device installation point. Inside SP there is a longitudinal duct hydraulically connected to an outlet branch pipe through an intake. The intake is located in symmetry plane of cross section along the whole rear wide side of SP in relation to incoming liquid flow, and connected through end sections of SP to working cavities of B.

EFFECT: creation of an effective device for liquid cleaning from abrasive inclusions; excluding penetration of impurities into liquid, which are capable of causing increased wear of bearings or shutting off flow passages of jet nozzles of hydrostatic bearings.

6 cl, 3 dwg