MULTI-STAGE WORKING CHAMBER OF EJECTOR AND EJECTOR (VERSIONS) Russian patent published in 2020 - IPC F04F5/44 

FIELD: jet pumps.

SUBSTANCE: multistage ejector chamber comprises a toroidal vessel assembled with two coaxial conical branch pipes for forming an axisymmetric active fluid flow outside the vessel, supplied into inner volume of vessel by means of supply device, comprising supply unions with shaped active nozzles, each of which creates jet of active medium, velocity vector of which is directed tangentially to inner contour of vessel cross-section by meridian plane. Axisymmetric flow of active fluid medium is created by means of annular nozzle with two working edges, each of which occurs when part of the inner volume of the vessel is cut off by internal conical surfaces of the branch pipes.

EFFECT: invention provides higher efficiency of action on a passive medium, improved energy characteristics and wider field of use of ejectors.

4 cl, 4 dwg