FLUID-PNEUMATIC EJECTOR Russian patent published in 2015 - IPC F04F5/04 

FIELD: machine building.

SUBSTANCE: ejector first stage working chamber is circular while its inside accommodates cylindrical chamber of second stage. Channel to feed active medium to second stage is located outside said first and second stages. Diffuser is arranged at first stage working chamber outlet with diffuser outlet cross-section accommodating second stage feed nozzle and spaced from edges of its holes to the plane of second stage cylindrical working chamber inlet cross-section through at least two diameters of its cross-section. Note here that second stage feed nozzle has shaped shield with the surface of solid of revolution composed of revolution of semicircle around second stage feed nozzle axis, nozzle centre being located at the distance therefrom while the plane of revolution is aligned with the plane of edges of second stage feed nozzles.

EFFECT: higher efficiency and reliability, decreased axial sizes.

5 dwg