SU648277A1 - Centrifugal jet nozzle - Google Patents

Description

one

The invention relates to the field of spraying liquids and can be used in various heat-induced power plants.

A centrifugal nozzle is known, comprising a housing with a nozzle and a twisting chamber with installed acmetentyi in it, changing the spray angle of the spray gun l.

The disadvantage of the device 5 is the impossibility of controlling the flow area of the swirl channels.

Another centrifugal nozzle is also known, comprising a housing with a nozzle, a twisting chamber and inlet channels in its side walls and elastic elements placed in the housing, 2j.

This device is closest to the invention in terms of technical drying and the result achieved.

Its disadvantage is the deterioration of the atomization quality with a change in fuel consumption due to an increase; viscous losses when the width of the gap between the elastic elements and the body decreases, which occurs when the pressure drop across the nozzle decreases, and also due to the limited range of flow control.

The purpose of the present invention is to expand the range of nozzle capacity control.

This goal is achieved by the fact that the elastic elements are made in the form of curved blades with a radius of curvature and a radius of their outer edges that exceed the radius of the twisting chamber installed at the outlet of the inlet channel of the housing between its end walls with the possibility of deviation from the side walls.

 In addition, the blades can be performed with a shank rigidly mounted in the side walls of the housing, and can also be equipped with a mounting sleeve rigidly connected to them.

FIG. 1 depicts the proposed nozzle, hfodolnom incision; on. (lig. 2 - section A-A in Fig. 1 (radius of curvature, ° C is the deflection angle of the blade installed in the housing); Fig. 3 shows the blade before its installation in the nozzle housing (ptg, deflection angle of the blade to installation in the housing); in Fig. 4 — a blade rigidly connected to the mounting sleeve; in Fig. 5 a view of the arrow B on the mounting sleeve prior to its installation in the housing; in Fig. 6, section B-B in Fig. 4; 7 - a graph of the flow characteristics of the prototype (curve l) and the characteristics of the proposed nozzle (curves 2 and 3) - when installing the elastic elements of the characteristics (curve 2) - with a tension that ensures the opening of channels at a predetermined minimum pressure drop dpp, tp, while ensuring that the given pressure drop is set to a specified minimum flow rate

V

the nozzle comprises a housing 1 with inlet channels 2, nozzles 3 and a twisting chamber 4 made in it. In the housing 1 elastic elements 5 are installed, made in the form of curved blades with a radius of curvature R and a radius of their outer edges exceeding the radius of the twisting chamber 4 installed on the output from the input channels of the housing 1 between its end Walls with the possibility of deviation from its side walls, t, e, the blade is installed with a tension,

When performing the blade 5 with the shank 6, the latter is rigidly fixed in the side wall of the housing.

In addition, the Lasket 5 can be equipped with a mounting sleeve 7 rigidly connected to them.

Centrifugal nozzle works as follows.

When fluid is supplied under pressure in channels 2 of housing 1, when it reaches a predetermined pressure, it bends the blades 5, acquires a swirling 4 in the chamber, vortex movement, expires through the syringe 3 in the form of a thin curtain and disperses into small fragments.

Due to the non-linear form of the dependence of the fluid flow on the nozzle geometrical characteristic that is not expressed in sfeHOM, the dependence of the fluid flow rate G f through the proposed nozzle on the pressure drop across it And RF is described by very complex dependencies. Calculation on the computer gives

smooth dependences of fluid flow on pressure drop (Fig. 7J.

Approximately, for opening injectors, this dependence is expressed by the following system of equations:

G

,

DR2-DR20.

dR

where P is the area of supply channels;

dP, is the pressure drop corresponding to the opening of elastic swirling channels ;:

Dr2 - pressure drop on the blades; Р - pressure drop on the channels; dR - pressure drop across the nozzle;

k 2 is the stiffness of the blades.

As can be seen, by changing the rigidity of the blades Qu and their tension G, the changing l can be obtained, an arbitrarily large relative change in G for a given change in dRf. The greatest range is achieved with a large preliminary tightening with respect to the cereal blade, when ppc, and K 2 is small.

Claims (3)

1. A centrifugal nozzle, containing a body with a nozzle, a twisting chamber and inlet channels in its side walls, and elastic elements housed in the body, so that, in order to expand the range of its performance control, the elastic elements are made in the form of curved blades with a radius of curvature and a radius of their outer edges greater than the radius of the swirling chamber installed at the exit of the inlet channels of the body between its end walls with the possibility of deviation from its side walls. 2. The injector is in accordance with Clause 1, O T L and h a km W 3 s, which the blades performed with a shank rigidly fixed in the side walls of the case, 3. The nozzle according to claim 1, characterized in that the blades are provided with a mounting sleeve rigidly connected to them. Sources of information brought into consideration during the examination: 1. USSR author's certificate N: 303481, cl. F 23 D 11/26, 1967. 2. Authors certificate of the USSR .V 153766, cl. F 23 D 11/04, 1962. Bh Rig. f Video FIG. five A-A S FIG. 6