CN114682405A - An internal swirl cross-hole injector - Google Patents

Abstract

The invention discloses an internal swirl cross-hole injector. It includes a first cavity, a second cavity, a first channel, a second channel, a third channel, a third cavity and a fourth cavity; the outside of the first cavity is sequentially provided with a second cavity and a third cavity The lower part of the first cavity is provided with a fourth cavity; the first cavity is communicated with the second cavity through the first channel; the first cavity and the fourth cavity are communicated through the second channel; the third cavity is connected with The fourth cavity is communicated through the third channel; the first cavity, the second cavity, the third cavity and the fourth cavity are all coaxial. The second channel of the present invention provides a space swirl guide for the second fluid, and after the swirl is formed, it quickly assists the first fluid to be broken and atomized to enhance the atomization effect; Collision can strengthen the disturbance effect; under the same injection pressure, the spray particle size is reduced by more than 25%, and the fluid evaporation, atomization and mixing efficiency is increased by more than 50%.

Description

An internal swirl cross-hole injector

technical field

The invention relates to the technical field of injectors and nozzles, in particular to an internal swirl cross-hole injector.

Background technique

The ejector is used in many kinds of spraying, spraying, oil spraying, sandblasting, spraying and other equipment, plays an important role, and is a very critical component that affects the effect of fluid atomization. The ejector is widely used in the industry, but in the prior art, the fluid mixing uniformity of the ejector is poor, the spray particle size is large under the same injection pressure, and the fluid evaporation, atomization and mixing efficiency are low.

For example, in the process of in-cylinder fuel atomization in the field of internal combustion engines, the atomization effect of fuel has a great influence on the fuel combustion effect, which directly affects the emission of pollutants. With the increasingly stringent national emission regulations, the requirements for fuel injectors are becoming more and more stringent.

For example, in order to reduce NOx emissions in the engine aftertreatment system, a reducing agent is injected into the exhaust gas, mixed with NOx, and then reacted in the SCR system to reduce emissions. However, the atomization effect of the reducing agent needs to be improved, and there is a problem of crystallization.

For example, the mixed gas of trichlorosilane and hydrogen in the field of polysilicon production enters the furnace cavity of the reduction furnace through the mixed gas nozzle, and the reaction is completed under high temperature and high pressure, and the generated silicon is deposited on the silicon mandrel. However, in the process, unqualified polysilicon will be generated, and in severe cases, the phenomenon of melting silicon such as burning will occur, which greatly reduces the appearance quality of polysilicon and is not conducive to product handling and sales.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an internal swirl cross-hole injector to solve the above-mentioned technical problems.

In order to solve the above-mentioned technical problems, the present invention has adopted the following technical solutions:

An internal swirl cross-hole injector, comprising a first cavity, a second cavity, a first channel, a second channel, a third channel, a third cavity and a fourth cavity; the outside of the first cavity A second cavity and a third cavity are arranged in sequence; a fourth cavity is arranged at the lower part of the first cavity; the first cavity is communicated with the second cavity through a first channel; the first cavity The body is communicated with the fourth cavity through the second channel; the third cavity is communicated with the fourth cavity through the third channel; the first cavity, the second cavity, the third cavity and the fourth cavity The cavities are all coaxial.

Further, the axial cross-sectional shape of the first channel and the third channel is one of a straight cylinder type, a tapered type, a gradually expanded type, a tapered and expanded type, and a gradually expanded and tapered type.

Further, the cross-sectional shape of the first channel and the third channel is one of a circle, an ellipse, a square, a rhombus, a slit, an intermittent circular ring, a triangle, and a rounded rectangle.

Further, both the first channel and the third channel are inclined, and one end of the first channel close to the first cavity is inclined to the side of the second channel, and the third channel is close to the first cavity. One end of the four-cavity body is inclined to the opposite side of the second channel.

Further, both the first channel and the third channel are provided with a plurality of arrays, and the axes of the first channel and the third channel do not intersect the axis of the first cavity.

Further, the cross-sectional shape of the second channel is one or a combination of straight cylinder, tapered, tapered, tapered tapered, tapered tapered.

Further, a plurality of second channels are provided, one end of the plurality of second channels is evenly distributed on the bottom of the first cavity, and the other end is inclined toward the axis of the first cavity and meets.

The present invention is used to strengthen the effect of fluid crushing, atomization and mixing; high-turbulence cross-spray holes are used, which can effectively enhance the turbulence and promote spray crushing and atomization; the second fluid with swirling flow shoots toward the fluid first cavity at high speed, and is connected with the first fluid cavity at high speed. The first fluid in a cavity is fully mixed, and the third fluid is ejected to the fourth cavity through the third channel to strengthen the mixing and assist its atomization. The injector provided by the invention can effectively improve the mixing uniformity of the fluid, the spray particle size is reduced by more than 25% under the same injection pressure, and the fluid evaporation, atomization and mixing efficiency is improved by more than 50%.

Description of drawings

Fig. 1 is the overall structure diagram of the present invention.

FIG. 2 is a cross-sectional view of a second channel in an embodiment of the present invention being a straight cylinder.

3 is a cross-sectional view of a second channel sub-channel in an embodiment of the present invention being a straight cylinder.

4 is a cross-sectional view of a tapered type of second channel sub-channel according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view of a second channel sub-channel in an embodiment of the present invention being of a gradually expanding type.

FIG. 6 is a cross-sectional view of a second channel sub-channel in an embodiment of the present invention that is tapered and expanded.

FIG. 7 is a cross-sectional view of a second channel sub-channel in an embodiment of the present invention that is gradually expanding and tapering.

8 is a cross-sectional view of a first channel swirl hole in an embodiment of the present invention having a straight cylindrical shape.

FIG. 9 is a cross-sectional view of a tapered cross-sectional shape of a first channel swirl hole in an embodiment of the present invention.

FIG. 10 is a cross-sectional view of a first channel swirl hole in an embodiment of the present invention with a gradually expanding cross-sectional shape.

FIG. 11 is a cross-sectional view of a first channel swirl hole in an embodiment of the present invention in which the cross-sectional shape is tapered and tapered.

FIG. 12 is a cross-sectional view of a first channel swirl hole in an embodiment of the present invention in which the cross-sectional shape is gradually expanding and tapering.

FIG. 13 is a cross-sectional view of a first channel swirl hole in an embodiment of the present invention, wherein the cross-sectional shape is a straight cylinder and does not intersect with the axis of the first cavity.

FIG. 14 is a cross-sectional view of a straight cylindrical shape of the cross-sectional shape of a third channel swirl hole in an embodiment of the present invention.

FIG. 15 is a cross-sectional view of a tapered cross-sectional shape of a third channel swirl hole in an embodiment of the present invention.

FIG. 16 is a cross-sectional view of a third channel swirl hole in an embodiment of the present invention in which the cross-sectional shape is gradually expanding.

Fig. 17 is a cross-sectional view of a third channel swirl hole in an embodiment of the present invention in which the cross-sectional shape is tapered and tapered.

FIG. 18 is a cross-sectional shape of a third channel swirl hole in an embodiment of the present invention, which may be a gradually expanding and tapering type.

19 is a cross-sectional view of a third channel swirl hole in an embodiment of the present invention in which the cross-sectional shape is a straight cylinder and does not intersect the axis of the first cavity.

In the figure: 1-first cavity; 2-second cavity; 3-first channel; 4-second channel; 5-third channel; 6-third cavity; 7-fourth cavity.

Detailed ways

The technical solutions of the present invention will be further described below through the accompanying drawings and embodiments.

1-2, the present embodiment provides an internal swirl cross-hole injector, including a first cavity 1, a second cavity 2, a first channel 3, a second channel 4, a third channel 5, and a third cavity 6 and a fourth cavity 7; a second cavity 2 and a third cavity 6 are arranged on the outside of the first cavity 1 in sequence; a fourth cavity 7 is arranged at the lower part of the first cavity 1; the The first cavity 1 and the second cavity 2 are communicated through the first channel 3; the first cavity 1 and the fourth cavity 7 are communicated through the second channel 4; the third cavity 6 and the fourth cavity The cavity 7 is communicated through the third channel 5; the first cavity 1, the second cavity 2, the third cavity 6 and the fourth cavity 7 are all coaxial.

The axial cross-sectional shape of the first channel 3 and the third channel 5 is one of a straight cylinder type, a tapered type, a gradually expanded type, a tapered and expanded type, and a gradually expanded and tapered type.

The cross-sectional shape of the first channel 3 and the third channel 5 is one of a circle, an ellipse, a square, a rhombus, a slit, an intermittent circular ring, a triangle, and a rounded rectangle.

Both the first channel 3 and the third channel 5 are inclined, and one end of the first channel 3 close to the first cavity 1 is inclined to the side of the second channel 4 , and the third channel 5 is close to the side of the second channel 4 . One end of the fourth cavity 7 is inclined to the opposite side of the second channel 4 .

Both the first channel 3 and the third channel 5 are arranged in multiple arrays, and the axes of the first channel 3 and the third channel 5 do not intersect with the axis of the first cavity 1 .

The cross-sectional shape of the second channel 4 is one or a combination of straight cylinder, tapered, tapered, tapered tapered, tapered tapered, and tapered tapered shapes.

There are a plurality of second channels 4 , one end of the plurality of second channels 4 is evenly distributed at the bottom of the first cavity 1 , and the other ends are inclined toward the axis of the first cavity 1 and meet.

The above are only preferred embodiments of the present invention, and do not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are still within the scope of the present invention. within the scope of the technical solution of the present invention.

Claims (7)

1. An internal swirl cross-hole injector, characterized in that it comprises a first cavity, a second cavity, a first passage, a second passage, a third passage, a third cavity and a fourth cavity; A second cavity and a third cavity are arranged on the outside of the first cavity in sequence; a fourth cavity is arranged at the lower part of the first cavity; the first cavity and the second cavity communicate with each other through a first channel ; the first cavity is communicated with the fourth cavity through the second channel; the third cavity is communicated with the fourth cavity through the third channel; the first cavity, the second cavity, the third cavity The three cavities and the fourth cavity are all coaxial. 2 . The internal swirl cross-hole injector according to claim 1 , wherein the axial cross-sectional shapes of the first passage and the third passage are straight cylindrical, tapered, tapered, tapered and tapered. 3 . One of the expansion type and the gradual expansion and contraction type. 3. An internal swirl cross-hole injector according to claim 2, wherein the cross-sectional shapes of the first passage and the third passage are circular, oval, square, diamond, slit, discontinuous One of the circle, triangle, and rounded rectangle. 4 . The internal swirl cross-hole injector according to claim 3 , wherein the first channel and the third channel are arranged obliquely, and the first channel is close to the first cavity. 5 . One end of the third channel is inclined to one side of the second channel, and one end of the third channel close to the fourth cavity is inclined to the opposite side of the second channel. 5 . The internal swirl cross-hole injector according to claim 4 , wherein a plurality of the first passages and the third passages are arranged in an array, and the first passages and the third passages are arranged in an array. 6 . The axes do not intersect with the first cavity axis. 6 . An internal swirl cross-hole injector according to claim 1 , wherein the cross-sectional shape of the second passage is a straight cylinder type, a tapered type, a gradually expanded type, a tapered and gradually expanded type, and a gradually expanded and gradually expanded type. 7 . One or a combination of several types of shrinkage. 7 . The internal swirl cross-hole injector according to claim 6 , wherein a plurality of second passages are provided, and one ends of the plurality of second passages are evenly distributed in the first cavity. 8 . The bottom of the body and the other end are inclined towards the axis of the first cavity and meet.

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