Double-oil-way atomizing nozzle assisted by air and pressure collaboratively

Abstract

The utility model relates to the technical field of gas turbines, in particular to a double-oil-way atomizing nozzle assisted by air and pressure collaboratively, which comprises a double-oil-way pipe body, an auxiliary oil nozzle, a main oil nozzle and an air nozzle, an auxiliary oil pipeline and a main oil pipeline which are mutually independent are arranged in the double-oil-way pipe body, the auxiliary oil pipeline is axially arranged in the center of the double-oil-way pipe body, and the main oil nozzle is arranged in the air nozzle. The main oil pipeline is axially arranged in the double-oil-way pipe body, and the main oil pipeline surrounds the auxiliary oil pipeline in the circumferential direction. A rotational flow chamber is arranged in the auxiliary oil nozzle, the rotational flow chamber is communicated with the auxiliary oil pipeline, and auxiliary oil fuel entering the rotational flow chamber has a rotational direction; the auxiliary oil nozzle is sleeved with the main oil nozzle, and the main oil nozzle communicates with the main oil pipeline. The air nozzle sleeves the main oil nozzle and is communicated with the outside; the rotation direction of air sprayed out of the air nozzle is opposite to that of main oil fuel sprayed out of the main oil nozzle. According to the arrangement, two fuel atomization modes of air assistance and pressure assistance are combined, and compared with one mode, a better atomization effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas turbines, in particular to a double-oil-path atomizing nozzle with coordinated assistance of air and pressure. Background Art

[0002] Pressure swirl atomizing nozzles are widely used due to their simple structure, good atomizing effect, and wide adjustment range. The quality of atomization is crucial to combustion efficiency and combustion performance. Better atomization quality can improve combustion quality and effectively transfer the generated heat. Air-assisted atomizing nozzles have better atomization quality. They have air channels inside and use high-pressure air for atomization, so that the fuel has a smaller particle size. Under the same fuel pressure, as the air pressure increases, the particle size becomes smaller and finally tends to a certain constant value.

[0003] With the development of combustion chambers, single oil pressure atomizing nozzles or air atomizing nozzles are increasingly unable to meet the needs of high-performance combustion chambers, and single-type nozzles are difficult to achieve high temperature rise and low pollution requirements. New combined nozzles are an inevitable trend of development. Utility Model Content

[0004] The purpose of the utility model is to solve at least one problem in the above-mentioned background technology and to provide a dual-oil-circuit atomizing nozzle with coordinated assistance of air and pressure.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a dual-oil-circuit atomizing nozzle with air and pressure synergistic assistance, comprising:

[0006] Dual oil pipe body, auxiliary oil nozzle, main oil nozzle and air nozzle;

[0007] The dual oil pipe body is provided with a secondary oil pipe and a main oil pipe that are independent of each other, wherein the secondary oil pipe is axially arranged at the center of the dual oil pipe body, the main oil pipe is axially arranged in the dual oil pipe body, and the main oil pipe circumferentially surrounds the secondary oil pipe;

[0008] The auxiliary oil nozzle is provided with a swirl chamber, the swirl chamber is communicated with the auxiliary oil pipeline, the auxiliary oil fuel entering the swirl chamber has a swirl direction, and the auxiliary oil nozzle is used to spray the auxiliary oil fuel;

[0009] The main oil nozzle is sleeved on the auxiliary oil nozzle, the main oil nozzle is in communication with the main oil pipeline, and the main oil nozzle is used to spray main oil fuel with a rotation direction;

[0010] The air nozzle is sleeved on the main oil nozzle, the air nozzle is connected to the outside, and the air nozzle is used to spray air with a rotation direction;

[0011] The air sprayed from the air nozzle and the main oil fuel sprayed from the main oil nozzle rotate in opposite directions.

[0012] Preferably, the auxiliary oil fuel sprayed from the auxiliary oil nozzle has an opposite rotation direction to the main oil fuel sprayed from the main oil nozzle.

[0013] Preferably, the auxiliary oil nozzle further comprises an auxiliary oil inlet and an auxiliary oil outlet, wherein the auxiliary oil inlet is arranged on the circumferential side wall of the auxiliary oil nozzle, and the auxiliary oil outlet is arranged at one end of the auxiliary oil nozzle away from the dual oil pipe body, the auxiliary oil inlet communicates with the auxiliary oil pipeline and the swirl chamber, and the auxiliary oil outlet is used to spray auxiliary oil fuel;

[0014] The auxiliary oil inlet is inclinedly arranged along the circumferential direction of the side wall of the auxiliary oil nozzle from one end close to the auxiliary oil pipeline to the other end.

[0015] Preferably, the main oil nozzle comprises a swirl pipeline, the swirl pipeline axially penetrates the main oil nozzle, one end of the swirl pipeline is connected to the main oil pipeline, and the other end is connected to the outside;

[0016] The swirl pipeline is arranged to be inclined along the circumference of the main oil nozzle from one end close to the main oil pipeline to the other end.

[0017] Preferably, the air nozzle comprises a plurality of air inlets and an air pipeline, the plurality of air inlets are uniformly arranged on the side wall of the air nozzle in the circumferential direction, and the air pipeline is spaced between the air nozzle and the main oil nozzle;

[0018] The air inlet is arranged obliquely along the circumference of the air nozzle from one end away from the main oil nozzle to the other end;

[0019] The air nozzle has a protrusion at one end close to the dual oil pipe body. When the air nozzle is sleeved on the main oil nozzle, the protrusion abuts against the main oil nozzle. The end of the air pipe away from the protrusion is used to spray air.

[0020] Preferably, the main oil nozzle comprises a swirl nozzle and an isolation tube body, the swirl nozzle is sleeved on the auxiliary oil nozzle, and the isolation tube body is sleeved on the swirl nozzle;

[0021] A swirl groove is provided on the circumferential side wall of the swirl nozzle. When the isolation tube body is sleeved on the swirl nozzle, the inner wall of the isolation tube body and the swirl groove enclose a space to form the swirl pipeline.

[0022] Preferably, the swirl chamber is configured to be conical, and the cone tip of the swirl chamber is configured to be far away from the dual oil circuit pipe body;

[0023] The auxiliary oil outlet is arranged on the center line of the cyclone chamber.

[0024] Preferably, the auxiliary oil outlet includes a straight section and an expansion section;

[0025] The expansion section is arranged at one end of the straight section away from the dual oil path pipe body;

[0026] The inner wall of the expansion section is inclined, and the opening size of the expansion section gradually increases from one end close to the straight tube section to the other end.

[0027] Preferably, the diameter of the main oil nozzle gradually decreases from one end close to the dual-oil pipe body to the other end.

[0028] Preferably, a first inlet is provided at one end of the dual oil pipe body away from the auxiliary oil nozzle, the first inlet is communicated with the auxiliary oil pipeline, and the first inlet is used for the auxiliary oil fuel to enter;

[0029] A second inlet is provided on the circumferential side wall of the dual oil-path pipe body, the second inlet is communicated with the main oil pipeline, and the second inlet is used for the main oil fuel to enter.

[0030] Based on this, the beneficial effects of the utility model are:

[0031] 1. The solution of the utility model includes an auxiliary oil nozzle, a main oil nozzle and an air nozzle. The three nozzles are independent of each other. The auxiliary oil nozzle has a swirl chamber, which can make the fuel form a swirl therein, thereby forming a pressure drop to inhale external air to achieve fuel atomization. The main oil fuel sprayed by the main oil nozzle and the air sprayed by the air nozzle are both swirls with opposite swirl directions. Fuel atomization is achieved under air impact. Through the combination of the two, multi-scenario and multi-fuel applications can be achieved. When a certain oil circuit has no power assistance or the power assistance is weak, the combination of the two can still ensure a good fuel atomization effect;

[0032] 2. Through the solution of the utility model, the auxiliary fuel nozzle and the main fuel nozzle spray fuel in opposite rotation directions, which can further enhance the mixing effect of the two. At the same time, the two oil circuits work at the same time, and the axial uniformity is greatly increased, which effectively improves the combustion efficiency;

[0033] 3. Through the solution of the utility model, the overall device realizes swirl through relevant structural settings, and does not use a cyclone, which can save a lot of space. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 An exploded view schematically showing an atomizing nozzle according to an embodiment of the utility model;

[0035] Figure 2 A cross-sectional view schematically showing an atomizing nozzle according to an embodiment of the utility model;

[0036] Figure 3A cross-sectional view schematically showing an auxiliary oil nozzle according to an embodiment of the utility model;

[0037] Figure 4 A side view schematically showing an auxiliary oil nozzle according to an embodiment of the utility model;

[0038] Figure 5 A schematic diagram schematically showing the structure of a main oil nozzle in one embodiment of the utility model;

[0039] Figure 6 A cross-sectional view schematically showing an air nozzle according to an embodiment of the utility model;

[0040] Explanation of the reference numerals: dual oil circuit pipe body 10, auxiliary oil pipeline 101, main oil pipeline 102, first inlet 103, second inlet 104, auxiliary oil nozzle 20, swirl chamber 201, auxiliary oil inlet 202, auxiliary oil outlet 203, straight section 2031, expansion section 2032, main oil nozzle 30, swirl pipeline 301, swirl nozzle 302, swirl groove 3021, isolation pipe body 303, air nozzle 40, air inlet 401, air pipeline 402, protrusion 403. DETAILED DESCRIPTION

[0041] The content of the present application will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are only to enable those skilled in the art to better understand and thus implement the content of the present application, rather than implying any limitation on the scope of the present application.

[0042] As used herein, the term “including” and variations thereof are to be interpreted as open-ended terms meaning “including, but not limited to.” The term “based on” is to be interpreted as “based, at least in part, on.” The terms “one embodiment” and “an embodiment” are to be interpreted as “at least one embodiment.”

[0043] Figure 1 An exploded view schematically shows an atomizing nozzle according to an embodiment of the present invention. Figure 2 A cross-sectional view schematically shows an atomizing nozzle according to an embodiment of the utility model. Figure 3 A cross-sectional view schematically shows a secondary oil nozzle according to an embodiment of the present invention, as shown in FIG. Figure 1-3 As shown, the utility model is a dual-oil-circuit atomizing nozzle with air and pressure synergistic assistance, comprising:

[0044] Dual oil pipe body 10, auxiliary oil nozzle 20, main oil nozzle 30 and air nozzle 40;

[0045] The dual oil pipe body 10 is provided with a mutually independent auxiliary oil pipe 101 and a main oil pipe 102. The auxiliary oil pipe 101 is axially arranged at the center of the dual oil pipe body 10. The main oil pipe 102 is axially arranged in the dual oil pipe body 10, and the main oil pipe 102 circumferentially surrounds the auxiliary oil pipe 101.

[0046] A swirl chamber 201 is provided in the auxiliary oil nozzle 20, and the swirl chamber 201 is connected to the auxiliary oil pipeline 101. The auxiliary oil fuel entering the swirl chamber 201 has a swirl direction, and the auxiliary oil nozzle 20 is used to spray the auxiliary oil fuel;

[0047] The main oil nozzle 30 is sleeved on the auxiliary oil nozzle 20, and the main oil nozzle 30 is connected with the main oil pipeline 102. The main oil nozzle 30 is used to spray the main oil fuel with a rotation direction;

[0048] The air nozzle 40 is sleeved on the main oil nozzle 30, and the air nozzle 40 is connected to the outside, and the air nozzle 40 is used to spray air with a rotation direction;

[0049] The air sprayed from the air nozzle 40 and the main oil fuel sprayed from the main oil nozzle 30 have a rotation direction opposite to each other.

[0050] Specifically, a first inlet 103 is provided at one end of the dual-oil-circuit pipe body 10 away from the auxiliary oil nozzle 20, and the first inlet 103 is connected to the auxiliary oil pipeline 101. A second inlet 104 is provided on the circumferential side wall of the dual-oil-circuit pipe body 10, and the second inlet 104 is connected to the main oil pipeline 102. At the same time, the first inlet 103 is also connected to external equipment, and auxiliary oil fuel can be supplied to the auxiliary oil pipeline 101 through the first inlet 103. The second inlet 104 is connected to external equipment, and main oil fuel can be supplied to the main oil pipeline 102 through the second inlet 104.

[0051] At the same time, an auxiliary oil nozzle 20, a main oil nozzle 30 and an air nozzle 40 are simultaneously arranged on the dual oil circuit pipe body 10. The auxiliary oil nozzle 20 has a swirl chamber 201 in which a swirl can be formed, thereby forming a pressure drop to attract external air to enter, thereby realizing fuel atomization. The main oil nozzle 30 and the air nozzle 40 spray out substances with opposite rotation directions. When the main oil nozzle 30 sprays out the main oil fuel, it will be mixed and impacted with the air sprayed out by the air nozzle 40, thereby realizing fuel atomization. By combining pressure-assisted atomization, a higher atomization effect can be achieved, and air-assisted atomization is beneficial to increasing heat and mass transfer between gas and liquid, so that the atomization quality of the fuel sprayed by the device is better. At the same time, since it has two assisted atomization methods, when one of them is not assisted, the device can still have a good fuel atomization effect, and can realize multi-scenario and multi-fuel applications.

[0052] Furthermore, the auxiliary oil fuel sprayed from the auxiliary oil nozzle 20 and the main oil fuel sprayed from the main oil nozzle 30 have opposite rotation directions. With this arrangement, when the auxiliary oil fuel and the main oil fuel are sprayed synchronously, the opposite rotation directions of the two can further enhance the mixing effect.

[0053] Further, Figure 4 A side view of a secondary oil nozzle according to an embodiment of the present invention is schematically shown. Figure 3 , 4 As shown:

[0054] The auxiliary oil nozzle 20 further includes an auxiliary oil inlet 202 and an auxiliary oil outlet 203. The auxiliary oil inlet 202 is arranged on the circumferential side wall of the auxiliary oil nozzle 20. The auxiliary oil outlet 203 is arranged at one end of the auxiliary oil nozzle 20 away from the dual oil pipe body 10. The auxiliary oil inlet 202 is connected to the auxiliary oil pipeline 101 and the swirl chamber 201. The auxiliary oil outlet 203 is used to spray the auxiliary oil fuel.

[0055] The auxiliary oil inlet 202 is inclined along the circumferential direction of the side wall of the auxiliary oil nozzle 20 from one end close to the auxiliary oil pipeline 101 to the other end.

[0056] Specifically, a plurality of auxiliary oil inlets 202 may be provided, which are circumferentially arranged on the side wall of the auxiliary oil nozzle 20. The auxiliary oil inlets 202 are circumferentially arranged from the outside to the inside along the side wall of the auxiliary oil nozzle 20, so that the auxiliary oil fuel entering the swirl chamber 201 through the auxiliary oil inlet 202 can form a swirl in a clockwise or counterclockwise direction, and finally when it is ejected through the auxiliary oil outlet 203, it is an auxiliary oil fuel with a swirl. In this way, a swirl is formed by providing an inclined cutout on the side wall of the auxiliary oil nozzle 20, which saves more space than the traditional method of using a swirler to form a swirl, so that the overall device can be more miniaturized.

[0057] The swirl chamber 201 can be set to be conical, and the cone tip of the swirl chamber 201 is set away from the dual oil channel pipe body 10, and the auxiliary oil outlet 203 is set on the center line of the swirl chamber 201, that is, it is set at the cone tip of the swirl chamber 201. In this way, when the auxiliary oil fuel enters the swirl chamber 201, the auxiliary oil fuel is squeezed by the inner wall of the swirl chamber 201 with a gradually decreasing diameter, thereby increasing the flow rate of the auxiliary oil fuel, providing impact force with other substances during subsequent spraying, thereby enhancing the mixing effect.

[0058] Further, the auxiliary oil outlet 203 includes a straight section 2031 and an expansion section 2032;

[0059] The expansion section 2032 is arranged at one end of the straight section 2031 away from the dual oil circuit pipe body 10, and the inner wall of the expansion section 2032 is inclined. The opening size of the expansion section 2032 gradually increases from one end close to the straight section to the other end. With this arrangement, when the auxiliary oil fuel in the swirl chamber 201 is sprayed out, it first passes through the straight section 2031 to achieve further mixing, and then is sprayed out through the expansion section 2032. The gradually increasing diameter of the expansion section 2032 can make the auxiliary oil fuel form a spray with a certain cone angle, thereby increasing the contact area with the main oil fuel and air, etc., and enhancing the mixing effect.

[0060] Further, Figure 5 A schematic diagram of the structure of a main oil nozzle in accordance with an embodiment of the present invention is shown as follows: Figure 5 As shown:

[0061] The main oil nozzle 30 includes a swirl pipeline 301, which axially penetrates the main oil nozzle 30, and one end of the swirl pipeline 301 is connected to the main oil pipeline 102, and the other end is connected to the outside;

[0062] The swirl pipeline 301 is inclined along the circumferential direction of the main oil nozzle 30 from one end close to the main oil pipeline 102 to the other end.

[0063] The swirl pipeline 301 is inclined from one end to the other along the circumference of the main oil nozzle 30, so that when the main oil fuel enters the swirl pipeline 301 through the main oil pipeline 102 and is sprayed out, a clockwise or counterclockwise swirl can be formed, which can be fully mixed with the air to achieve atomization. In this way, the swirl of the main oil fuel is also achieved through the relevant structural settings, without the need for a separate swirler, thereby reducing the overall equipment volume.

[0064] Furthermore, the main oil nozzle 30 further includes a swirl nozzle 302 and an isolation tube body 303, the swirl nozzle 302 is sleeved on the auxiliary oil nozzle 20, and the isolation tube body 303 is sleeved on the swirl nozzle 302;

[0065] A swirl groove 3021 is provided on the circumferential side wall of the swirl nozzle 302 . When the isolation tube body 303 is sleeved on the swirl nozzle 302 , the space enclosed by the inner wall of the isolation tube body 303 and the swirl groove 3021 forms a swirl pipeline 301 .

[0066] In this arrangement, the main oil nozzle 30 is split into two components, wherein the swirl nozzle 302 is provided with a swirl groove 3021, which can realize the swirl of the main oil fuel, and the isolation tube body 303 can isolate the swirl groove 3021 from the air nozzle 40 to avoid premature mixing of the two. At the same time, the method of forming a swirl pipeline 301 by combining the two components is easier to process and realize than the method of setting the swirl pipeline 301 inside one component.

[0067] At the same time, the swirl nozzle 302 is detachably connected to the isolation tube body 303, and the swirl angle after the main oil fuel is sprayed out can be changed by replacing the swirl nozzle 302 with a swirl groove 3021 with a different inclination angle, so that the device can match different usage scenarios.

[0068] Furthermore, the diameter of the main oil nozzle 30 gradually decreases from one end close to the dual oil circuit tube body 10 to the other end, and can form a nearly conical structure, thereby increasing the fuel flow rate by shrinking the space size, thereby achieving a better mixing effect of the main oil fuel and air.

[0069] Further, Figure 6 A cross-sectional view schematically shows an air nozzle according to an embodiment of the present invention, as shown in FIG. Figure 6 As shown:

[0070] The air nozzle 40 includes a plurality of air inlets 401 and an air pipeline 402. The plurality of air inlets 401 are evenly arranged on the side wall of the air nozzle 40 in the circumferential direction. The air nozzle 40 and the main oil nozzle 30 are separated by the air pipeline 402.

[0071] The air inlet 401 is arranged to be inclined along the circumference of the air nozzle 40 from one end away from the main oil nozzle 30 to the other end;

[0072] The air nozzle 40 has a protrusion 403 at one end close to the dual oil pipe body 10. When the air nozzle 40 is sleeved on the main oil nozzle 30, the protrusion 403 abuts against the main oil nozzle 30, and the end of the air pipe 402 away from the protrusion 403 is used to spray air.

[0073] Specifically, one end of the air nozzle 40 has a protrusion 403 , and when it is sleeved on the main oil nozzle 30 , this end is blocked and sealed by the protrusion 403 , and air cannot flow out from this end.

[0074] An air inlet 401 is provided on the side wall of the air nozzle 40, and is inclined along the circumference of the air nozzle 40, so that the air can form a vortex after entering the air pipeline 402 through the air inlet 401, and then it is air with a rotation direction when it is ejected. At the same time, the rotation direction of the air ejected by the air nozzle 40 is opposite to the rotation direction of the main oil fuel ejected by the main oil nozzle 30, which can enhance the mixing effect between the two.

[0075] To sum up, through the scheme of the utility model, pressure-assisted fuel atomization and air-assisted fuel atomization are combined, so that the device has two atomization methods at the same time. When a certain oil circuit has weak assistance or no assistance, the overall device can still achieve better fuel atomization effect through another oil circuit. At the same time, the auxiliary oil nozzle 20, the main oil nozzle 30 and the air nozzle 40 can all spray fuel or air with a rotation direction, ensuring better oil-gas mixing between the fuel and the air, thereby ensuring the atomization effect of the fuel.

[0076] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

[0077] It should be understood that the size of the serial numbers of the steps in the utility model content and embodiments of the present application does not absolutely mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Claims

1. A dual-oil atomizing nozzle with air and pressure synergistic assistance, characterized in that: include: Dual oil pipe body, auxiliary oil nozzle, main oil nozzle and air nozzle; The dual oil pipe body is provided with a secondary oil pipe and a main oil pipe that are independent of each other, wherein the secondary oil pipe is axially arranged at the center of the dual oil pipe body, the main oil pipe is axially arranged in the dual oil pipe body, and the main oil pipe circumferentially surrounds the secondary oil pipe; The auxiliary oil nozzle is provided with a swirl chamber, the swirl chamber is communicated with the auxiliary oil pipeline, the auxiliary oil fuel entering the swirl chamber has a swirl direction, and the auxiliary oil nozzle is used to spray the auxiliary oil fuel; The main oil nozzle is sleeved on the auxiliary oil nozzle, the main oil nozzle is in communication with the main oil pipeline, and the main oil nozzle is used to spray main oil fuel with a rotation direction; The air nozzle is sleeved on the main oil nozzle, the air nozzle is connected to the outside, and the air nozzle is used to spray air with a rotation direction; The air sprayed from the air nozzle and the main oil fuel sprayed from the main oil nozzle rotate in opposite directions.

2. The dual-oil-circuit atomizing nozzle with air and pressure synergistic assistance according to claim 1 is characterized in that: The auxiliary oil fuel sprayed from the auxiliary oil nozzle and the main oil fuel sprayed from the main oil nozzle have a rotation direction opposite to that of the auxiliary oil fuel.

3. The dual-oil-circuit atomizing nozzle with air and pressure synergistic assistance according to claim 2 is characterized in that: The auxiliary oil nozzle further comprises an auxiliary oil inlet and an auxiliary oil outlet, wherein the auxiliary oil inlet is arranged on a circumferential side wall of the auxiliary oil nozzle, and the auxiliary oil outlet is arranged at one end of the auxiliary oil nozzle away from the dual oil pipe body, the auxiliary oil inlet communicates with the auxiliary oil pipeline and the swirl chamber, and the auxiliary oil outlet is used to spray auxiliary oil fuel; The auxiliary oil inlet is inclinedly arranged along the circumferential direction of the side wall of the auxiliary oil nozzle from one end close to the auxiliary oil pipeline to the other end.

4. The dual-oil-circuit atomizing nozzle with air and pressure synergistic assistance according to claim 2, characterized in that: The main oil nozzle comprises a swirl pipeline, the swirl pipeline axially penetrates the main oil nozzle, one end of the swirl pipeline is connected to the main oil pipeline, and the other end is connected to the outside; The swirl pipeline is arranged to be inclined along the circumference of the main oil nozzle from one end close to the main oil pipeline to the other end.

5. The dual-oil-circuit atomizing nozzle with air and pressure synergistic assistance according to claim 2, characterized in that: The air nozzle comprises a plurality of air inlets and an air pipeline, wherein the plurality of air inlets are evenly arranged on the side wall of the air nozzle in a circumferential direction, and the air pipeline is spaced between the air nozzle and the main oil nozzle; The air inlet is arranged obliquely along the circumference of the air nozzle from one end away from the main oil nozzle to the other end; The air nozzle has a protrusion at one end close to the dual oil pipe body. When the air nozzle is sleeved on the main oil nozzle, the protrusion abuts against the main oil nozzle. The end of the air pipe away from the protrusion is used to spray air.

6. The dual-oil-circuit atomizing nozzle with air and pressure synergistic assistance according to claim 4, characterized in that: The main oil nozzle comprises a swirl nozzle and an isolation tube body, the swirl nozzle is sleeved on the auxiliary oil nozzle, and the isolation tube body is sleeved on the swirl nozzle; A swirl groove is provided on the circumferential side wall of the swirl nozzle. When the isolation tube body is sleeved on the swirl nozzle, the inner wall of the isolation tube body and the swirl groove enclose a space to form the swirl pipeline.

7. The dual-oil-circuit atomizing nozzle with air and pressure synergistic assistance according to claim 3, characterized in that: The swirl chamber is configured to be conical, and the conical tip of the swirl chamber is configured to be far away from the dual oil circuit pipe body; The auxiliary oil outlet is arranged on the center line of the cyclone chamber.

8. The dual-oil-circuit atomizing nozzle with air and pressure synergistic assistance according to claim 7, characterized in that: The auxiliary oil outlet includes a straight section and an expansion section; The expansion section is arranged at one end of the straight section away from the dual oil path pipe body; The inner wall of the expansion section is inclined, and the opening size of the expansion section gradually increases from one end close to the straight tube section to the other end.

9. The dual-oil-circuit atomizing nozzle with air and pressure synergistic assistance according to claim 5, characterized in that: The diameter of the main oil nozzle gradually decreases from one end close to the dual-oil pipe body to the other end.

10. The dual-oil-circuit atomizing nozzle with air and pressure synergistic assistance according to claim 1, characterized in that: A first inlet is provided at one end of the dual oil pipe body away from the auxiliary oil nozzle, the first inlet is communicated with the auxiliary oil pipeline, and the first inlet is used for the auxiliary oil fuel to enter; A second inlet is provided on the circumferential side wall of the dual oil-path pipe body, the second inlet is communicated with the main oil pipeline, and the second inlet is used for the main oil fuel to enter.

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