Injector

 

(57) Abstract:

Usage: for spraying and subsequent combustion. The inventive housing 1 has two coaxially installed bushings 2, 3 with the formation of internal and peripheral channels for supplying the atomizer and the intermediate channel for the fluid. On the collet ring rows made the slits 5, directed towards each other and offset in the circumferential direction in adjacent rows, the outer of which 6 are longitudinal axis of the slots 5 intersect the axis of the nozzle at its output cutoff and internal 7 - in front of her weekends cut inside the housing 1. The side walls of a larger area of the slots 5 on the sleeves 2, 3 are located in planes intersecting the axis of the nozzle at a single point located at or beyond its output slice, and the longitudinal axis of the slots 5 of the outer and inner rows 6, 7, respectively, inclined to each other at an angle not exceeding 90o. 5 Il.

The invention relates to a technique of sputtering, in particular, liquids slurries, solutions, liquid fuel, suspensions) compressed air or steam. The nozzle can be used in energy fuel combustion.

Analysis of the patent and those who one of the main directions in the improvement of the design of modern injectors is to increase the efficiency and quality of spraying, for example, by redistributing the total flow of the atomizer with the help of special devices inside the nozzle.

Known patents great Britain N 1378307 and N 1420027. The first uses a partition with two baffles, creating two threads twisted in opposite directions, and the second tubular element in the form of a cylinder or truncated cone. The presence of additional devices in the nozzle body complicates its design and reliability.

Known injector, in which the efficiency and quality of atomization is solved by fuel and spray in independent flow paths at the entrance of the nozzle, when the output of which flows interact.

The closest technical solution is a nozzle, comprising a housing, sleeve, coaxially installed with the formation of the annular fuel cracks and internal and peripheral channels for supplying the sprayer with the appropriate output nozzles in the form of an annular series of narrow slots that are offset in the circumferential direction in adjacent rows, wherein the longitudinal axis of the slots of the outer row are oriented towards the axis of the nozzle, and an internal number from the axis of the nozzle (ed. St. USSR N 876179). Open to the axis of the nozzle, and another from her. These streams provide a wide torch, in which a less pronounced effect coagulation of the droplets due more to the developed surface of contact with the environment and lengthening the path of separate flows, improving mixing with the environment and reduces the concentration of droplets in the stream.

A disadvantage of the known nozzle is that the two independent flow atomizer have a twist in different directions around the axis of the nozzle, which leads to the collapse of the spray in the axial zone of the flow, the appearance of built-up edge on the end face of the nozzle, the deterioration of the reliability of the injector.

The problem to which the invention is directed, is to increase the efficiency and quality of spraying, the improvement of mixing, i.e., obtaining a homogeneous mixture of the liquid with air or other gaseous substance, and increase reliability through the elimination of the water drops sprayed liquid on the outer surface of the nozzle.

This objective is achieved in that the nozzle, comprising a housing and a sleeve coaxially mounted therein with the formation of internal and peripheral is this to guard Rath, made in the form of an annular series of narrow slots that are offset in the circumferential direction in adjacent rows, the outer of which the longitudinal axis of the slots is oriented towards the axis of the nozzle, and inland from the axis of the nozzle, the longitudinal axis of the slots of the outer and inner rows inclined to each other at an angle not exceeding 90aboutand side walls of a larger area of these slots are located in planes intersecting the axis of the nozzle at a single point located at or above its output slice.

From the prototype of the claimed invention differs in that the longitudinal axis of the slots of the outer and inner rows inclined to each other at an angle not exceeding 90aboutand side walls of a larger area of these slots are located in planes intersecting the axis of the nozzle at a single point located at or above the output of the slicer. Each of these features is significant, and collectively solves the problem, namely, the location of the coaxial sleeves of the slots so that the longitudinal axis and at the outer and inner rows inclined to each other at an angle not exceeding 90abouthelps to reduce energy losses of the opposing jets to interact, increasing ieli, reduction of vortex formation in the zone of interaction of the liquid with sprayer. Execution of the slots so that the side walls with their larger area are located in planes intersecting the axis of the nozzle at a single point located at or above the output of the slicer provides the expiration of jets both threads with spin in one direction around the axis of the nozzle. The overall intensity of the twist of the thread dispenser of this increase, which excludes the possibility of a collapse of the spray in the axial zone of the flow, since the increased centrifugal effect of intensive gas flow along the axis of the nozzle from space, remote from the nozzle, toward its center. This thread, not containing droplets of liquid washes the end of the nozzle, keeps it clean and prevents the built-up edge.

In addition, the increase in the intensity of the twist of the thread and the reduction of the angle between the jets, weaken the effect of their collision, reduce static pressure along the perimeter of the fuel gap and thereby increase the ejection. On the one hand, increases the atomization quality, and, on the other hand, enhances the effect of washing the outer surfaces of the nozzles in the vicinity of the outlet gas flow, the treatment tip can wenye the surface of the nozzle is also kept clean and the reliability of its work increases.

Collectively, all the above mentioned features, we offer nozzles are improving the efficiency and quality of spraying, improve mixing and increase reliability.

In Fig. 1 shows a General view of the nozzle, a longitudinal section; Fig. 2 the spray head on the outer sleeve which in enlarged scale made the cut, Fig. 3 view of the spray head from the top and the direction of twist of the threads of the atomizer relative to the axis of the nozzle; Fig. 4 is the same view in a perspective view with a cut made in an enlarged scale on the outer sleeve of Fig. 5 scheme of the spray, side view.

The nozzle includes a housing 1, which is coaxially aligned with a gap between a set of the outer 2 and inner 3 bushing, forming a nozzle apparatus with the ring slit 4 for the fluid. On the outer 2 and inner 3 bushings nozzle of the device is made slits 5, directed towards each other at an angle (Fig. 4), not exceeding 90aboutand offset in the circumferential direction in adjacent rows, the outer row 6 to the longitudinal axis is oriented towards the axis of the nozzle, the inner row 7 from the axis of the nozzle.

The side walls of a larger area of the slots 5 raspolozhenyh. 4). This embodiment and arrangement of the slits 5 contributes to the fact that each pair of oppositely offset of the slots of the outer 2 and inner 3 sleeves lying in planes that are close to parallel. In free space the rows of jets arising out of the holes 6 and 7, form a twisted one side of the inner 8 and outer 9 streams of atomized liquid. In the axial zone of the flow is formed twisted in the same direction of the Central vortex flow 10. At the rear of the nozzle holes 11 and 12 for the supply of spray in the internal and peripheral channels, respectively, and a hole 13 for the liquid (e.g. oil) in the intermediate channel. The Central part of the nozzle is closed by the cover 14.

The nozzle operates as follows.

The holes 11 and 12 are served under the pressure of the air or steam which enters through the peripheral and internal channels respectively in the slots 5 of the outer 2 and inner 3 sleeves and flows through a series of outlet openings 6 and 7, the fuel is fed through a hole 13 in the intermediate channel. The jet of steam flowing out of the outlet openings 6 and 7 are directed towards each other with an offset in a staggered manner and are close to parallel planes, which provides mutual proterty 7 internal number. Propagating thus the rows of jets share the sprayed fuel (liquid) into two separate streams, one of which 8 are directed towards the axis of the nozzle, and the other 9 (Fig. 5). These threads allow to obtain a wide torch, which reduces the coagulation liquid droplets and increases the efficiency of mixing with the ambient air by increasing the contact surface and lengthening the path of their independent movement.

The location of the slots 5 in planes intersecting the axis of the nozzle at the point Of being at or above the output of the slicer allows you to spin in one direction of the jet resulting from these holes. In free space the rows of jets arising out of the holes 6 and 7, form twisted to one side of the inner 8 and outer 9 streams of atomized liquid. Twisting in one direction around the axis of the nozzle rows of jets flowing out of the outlet openings 6 and 7, improves ejection properties of the spray reduces the static pressure along the perimeter of the ring slit 4 for the fluid and improves the quality of its dispersion. Twisting in one direction around the axis of the nozzle flow 8 and 9 increases the centrifugal force, predot the conditions for formation of the end surface of the nozzle Central vortex flow 10, associated with free space (Fig. 5). He intensifies the mixing of the spray with the environment due to the axial return flow of gas trailing vortex flow. Return gas flow is formed in the free space that is remote from the zone of atomization. There are no drops of sprayed liquid (fuel or dried material). Washing in the radial direction from the center to the periphery of the end surface of the nozzle in a stream of gas containing liquid droplets, prevents built-up edge on the lid 14.

The location of the longitudinal axes of the slots 5 at an angle not exceeding 90aboutto each other, reduces the angle between the streams flowing from the exhaust holes on both sleeves, weakening the effect of their collision. This further improves ejection properties of the spray reduces the static pressure along the perimeter liquids cracks and only in conjunction with the spin in one side of the rows of jets flowing out of the outlet holes, creates conditions for the formation of the end surface of the nozzle Central vortex flow 10 associated with free space (Fig. 5), provides the high quality spraying and the effect is. Thus the outer surfaces of the nozzle as well as its end, remain clean, which further increases the reliability of the injector.

If there is another effect is almost complete elimination of abrasive wear. This comes from the fact that the fluid flowing from the annular slit in the form of thin films having a low speed in its walls. On the edges of these films due to the viscous forces of the fluid is decelerated on the walls of the annular gap and cannot purchase high-speed, sufficient for the occurrence of abrasive wear in the presence of liquid abrasive particles, which also increases the service life.

The use of the proposed nozzles can reduce the number of burners, significantly reduce the consumption of spray to stabilize the combustion, and virtually eliminate the noise accompanying the operation of pneumatic and steam atomizers, and to minimize harmful emissions into the atmosphere.

NOZZLE, comprising a housing and a sleeve coaxially mounted therein with the formation of internal and peripheral channels for supplying the atomizer and the intermediate channel for the fluid connected to Solovay apparatus, made in the form code made with a longitudinal axis, intersecting with the axis of the nozzle at its output slice, and the slits of the inner series with a longitudinal axis intersecting with the axis of the nozzle before it is output slice inside the housing, wherein the longitudinal axis of the slots of the outer and inner rows inclined to each other at an angle not exceeding 90oand side walls of a larger area of these slots are located in planes intersecting the axis of the nozzle at a single point located at the level of its output slice or behind them.

 

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