SELF-PRIMING DEVICE FOR ROTODYNAMIC PUMP Russian patent published in 2017 - IPC F04D9/02 

FIELD: engines and pumps.

SUBSTANCE: device comprises a phase-dividing vat. The vat is attached to a pump delivery pipe by virtue of a discharge circulation pipe and to a pump suction tube assembly by virtue of a suction circulation branch, an adjoined to it ejector and a process pipe. A vat cavity is fitted with a crash protection of a tapered semi-sphere form and of a linked against each other lock valve of a quill cylinder form, a rod and a water sponson that are positioned within the directional vessel of a quill cylinder form. A vessel is positioned at the holes in the vat end and at a cap on the common normal axis. A part of a vessel wallside, which is in the vat internal cavity, is porous implemented. A force main is mounted at the top of the vessel lateral face, that is closer to the vessel. The process pipe has an S-shaped formation, and its upward component has a height at which its upside is on one horizontal plane with the conveyed fluid level with which the vat is filled prior to pump actuation. The process pipe upper component is attached to the ejector nozzle cylindrical section by dint of a gas bleeding branch pipe, and its bottom component - to an ejector diffuser section butt end.

EFFECT: providing with durable pumpdown in rotordynamic pump suction line.

2 dwg