SU1173131A1 - Centrifugal atomizer - Google Patents

Abstract

A CENTRIFUGAL NOZZLE containing a casing, a cylindrical twisting chamber placed therein with inlets in the wall and an outlet nozzle and a guide device installed in the chamber in the form of elastic elements fixed at one end in the wall of the twisting chamber and adjacent to it in the zone of inlets, t l and so that, in order to simplify the construction, the elastic elements of the guide vane are hollow and their cavities communicate with the atmosphere. S 3 (L with 00 her

Description

one . . 1 The invention relates to devices intended for dispensing liquids and can be used in power, chemical engineering and other industries. The purpose of the invention is to simplify the design. , The .1 schematically depicts a nozzle with radial channels; figure 2 - section aa in figure 1; Fig. 3 shows another embodiment of a nozzle with tangential channels; Fig. 4 shows the connection of the cavities of the elements of the guide vehicle to the atmosphere. The proposed nozzle includes a housing 1 with a cylindrical twisting chamber 2 arranged therein, which is formed by an outlet nozzle 3. Chamber 2 is connected to the housing cavity by inlets 4 in its wall and is worn by a guide device made in the form of arc-shaped hollow elastic elements 5 (formed arcs of circles of equal diameter in the form of a Bourdon), which are fixed in the wall of chamber 2 with only one of their ends, ensuring that these elements run to the inner surface of the wall of chamber 2 in the location of the holes 4. The other end of the elements 5 is not fixed. The cavities of the elements 5 are connected by holes 6 with the atmosphere or with a source of control pressure (not shown). The inlets 4 of the swirling chamber are preferably made tangentially directed towards the loose ends of the elements 5, since this reduces the hydraulic resistance of the nozzle. The nozzle works as follows. The working fluid entering the housing 1 under pressure penetrates through the openings 4 into the chamber 2, acting on the elastic elements 5 and bending their ends inside the chamber / This 12 changes the flow sections of the openings 4, the fluid bounded by the elements 5 of the guide vane, moves tangentially with respect to the wall of chamber 2 and twists; moreover, if holes 4 are tangential (Fig. 3), the liquid enters chamber 2 with minimal resistance. Being in a swirling flow of fluid, the elements 5 react to a change in pressure in this flow, bending in the direction opposite to the wall of chamber 2 or returning to their original position. At the same time, as the pressure of the fluid increases, the elements 5 more and more bend into the chamber 2, increasing the flow area of the holes 4, simultaneously reducing the swirling radius of the fluid flow, as the loose ends of the elements 5 move to the axis of the chamber 2. At the initial moment the fluid pressure from the wall of chamber 2 and the liquid through the tangential channels enters the swirling chamber, where an annular flow is formed. Being in the annular flow, the elements are compressed by the static pressure of the flow, reducing its radius of curvature, and take a stable position. The occurrence of self-oscillations is prevented by static pressure in the annular flow. With an increase in the flow rate of the supplied fluid, the static pressure in the flow increases. With decreasing pressure, the elements 5 unbend, reducing the flow area of the holes 4 and increasing the swirling radius of the flow. Thus, the nozzle operates in self-adjusting mode. . The connection of the cavities of the elements 5 with the atmosphere of the holes 4 will increase the sensitivity of the nozzle to changes in pressure drop, since in this case the rigidity of the elements will be less than in the case of sealing their cavities.

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Claims (1)

CENTRIFUGAL NOZZLE, comprising a housing, a cylindrical swirling chamber disposed in it with inlet openings in the wall and an outlet nozzle, and a guide apparatus mounted in the chamber in the form of elastic elements fixed at one end in the swirling chamber wall and adjacent to it in the region of the inlet openings, characterized in that, in order to simplify the construction, the elastic elements of the guide apparatus are hollow and their cavities are in communication with the atmosphere. _Λ Fig. 1 1173