RU2555102C1 - Working chamber of ejector - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: chamber is intended for jet type pumps. The chamber includes an annular shaped active nozzle, a coaxially located supply branch pipe of passive fluid medium, a toroid-shaped vessel for formation of an active fluid medium flow entering it by means of a supply device containing supply branch pipes, each of which is provided with an active shaped nozzle intended to create an active medium jet, the speed vector of which is directed at a tangent to the internal contour of the cross section of the toroid-shaped vessel with a meridian plane, a discharge branch pipe for a mixture of active and passive media, which have a possibility of forming a shaped annular nozzle when assembled with the toroid-shaped vessel.

EFFECT: improvement of energy characteristics of the specified devices.

4 cl, 2 dwg

Description

The invention relates to the class of jet pumps, its purpose is to improve the energy characteristics of these devices.

Known related to inkjet technology VORTEX EJECTOR (copyright certificate SU No. 1333866 A1, class F04F 5/42 from 01/03/86), containing a swirl chamber with central passive and annular active nozzles, a mixing chamber and a diffuser. In the active nozzle are twisting elements. In order to increase the ejection coefficient on the outer surface of the passive nozzle, screw cutting was performed, which performs the functions of twisting elements.

Known intended for use in the chemical, petrochemical and other industries VORTEX JET EQUIPMENT (patent RU No. 2076250 C1. Class 6 F04F 5/42 from 04.29.94), consisting of several detachable and / or one-piece cylindrical sections containing a receiving chamber, annular shaped active nozzle and tangential inlet fitting. Active nozzles may be provided with guides or grooves, or profiled blades, for example blades such as steam and gas blades.

SUMMARY OF THE INVENTION

The present invention relates to the most important working body of a jet pump, creating a flow of active fluid, the parameters of which (the magnitude and direction of the velocity vector, temperature of the active medium, etc.) determine the effectiveness of exposure to a passive fluid. It is proposed to influence the magnitude and direction of the active fluid flow velocity vector using a working chamber consisting of a toroidal vessel having two profiled nozzles aligned with it and forming a profiled annular nozzle assembled with the vessel. The toroidal vessel is designed to form a flow of active fluid entering into it by means of a feed device containing supply pipes arranged uniformly around the circumference. Each supply nozzle is equipped with a profiled active nozzle designed to create a jet of active fluid. The axis of the profiled active nozzle is located in the meridian plane so that the velocity vector of the jet of active fluid is directed tangentially to the inner contour of the cross section of the toroidal vessel by the meridian plane. In this case, an axisymmetric two-dimensional flow of the active medium is created at the exit from the annular nozzle, the velocity vector of which has axial and radial components. In order to obtain a three-dimensional flow at the exit from the annular nozzle, the shaped active nozzle should be positioned so that the velocity vector of the active fluid stream is directed tangentially to the inner contour of the toroidal vessel section by a plane forming an acute dihedral angle with the meridian plane of the vessel, the edge of which is the plane of intersection symmetries of the toroidal surface with the meridian plane of the vessel.

The proposed design allows to increase the increment of the kinetic energy of the passive medium flow when using a multi-stage working chamber.

WORK CAMERA DESIGN

The design of the working chamber is shown schematically in the drawing of FIG. 1. The toroidal vessel 2 has two profiled nozzles aligned with it. The pipe 1 is designed to supply a passive fluid, the pipe 5 is designed to divert a mixture of passive and active fluids. The nozzles are made in such a way that, when assembled with a toroidal vessel, they form a profiled annular nozzle 6. The active fluid enters the vessel using a feed device, which includes uniformly arranged circumferential feed nozzles 3, each nozzle is equipped with a profiled active nozzle 4.

To create an axisymmetric two-dimensional flow of the active medium at the exit from the nozzle 6, the velocity vector of which has axial and radial components, the axis of the active nozzle 4 is located in the meridian plane so that the velocity vector of the jet of active fluid emerging from it is directed tangentially to the inner contour of the section toroidal vessel 2 by this plane.

The considered design of the working chamber makes it possible to obtain at the exit of the nozzle 6 a three-dimensional flow of the active medium, the velocity vector of which has a component perpendicular to the meridian plane of the working chamber, that is, a tangential component. To obtain a three-dimensional flow at the exit from the nozzle 6, the active nozzle 4 should be positioned so that at the exit from the nozzle 4 the velocity vector of the active fluid jet is directed tangentially to the inner contour of the cross-section of the vessel 2 by a plane forming an acute dihedral angle with the meridian plane of the vessel 2 whose edge is the line of intersection of the plane of symmetry of the toroidal surface with the meridian plane of the vessel.

The axial symmetry of evenly spaced nozzles 3 with active nozzles 4 and a toroidal inner surface create conditions for the appearance of an axisymmetric vortex flow of active fluid inside the vessel 2. The peripheral part of this flow enters the annular nozzle 6, at the outlet of which, depending on the embodiment of the active fluid supply device, an axial or swirling flow of active fluid occurs. In the steady state, the active stream transfers part of its kinetic energy to the passive stream during mixing during movement in the pipe 5.

The increment of the kinetic energy of the passive medium flow can be increased by using the multi-stage working chamber shown in the drawing of FIG. 2. It can consist of a universal nozzle for supplying and discharging fluid 10 and two mutually symmetric parts 8 and 9 of the vessel 2. The operating mode of the device for supplying active fluid to the toroidal vessel can be selected separately for each stage, depending on the need.

Claims (4)

1. The working chamber of the ejector containing an annular shaped active nozzle, characterized in that it includes a coaxially arranged nozzle designed to supply a passive fluid medium, a toroidal vessel designed to form a flow of active fluid entering it using a feed device, containing supply nozzles, each of which is equipped with a profiled active nozzle designed to create a jet of active medium, the velocity vector of which is directed tangentially to the inner the cross-sectional contour of the toroidal vessel by the meridian plane, a nozzle designed to drain the mixture of active and passive media, made with the possibility of forming a profiled annular nozzle assembled with the toroidal vessel, at the exit of which a two-dimensional axisymmetric flow of the active medium is created, the velocity vector which is located in the meridian plane of the chamber, has axial and radial components. 2. The working chamber of the ejector according to claim 1, the active medium supply device of which is configured such that the velocity vector of the jet of active fluid emerging from the active nozzle is directed tangentially to the inner contour of the toroidal vessel section by a plane forming an acute dihedral angle with the meridian plane of the vessel, with an edge which is the line of intersection of the plane of symmetry of the toroidal surface with the meridian plane of the vessel. 3. The working chamber of the ejector according to claim 1, made with the possibility of assembling a multi-stage structure, as well as with the possibility of setting the feed mode of the active fluid for each individual stage. 4. The working chamber of the ejector according to claim 2, made with the possibility of assembling a multi-stage structure, as well as with the possibility of setting the feed mode of the active fluid for each individual stage.

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