A cyclone pre-posed centrifugal atomizing nozzle

Abstract

The present application relates to the technical field of engine, and provides a centrifugal atomizing nozzle with preposed vortex, which comprises a heat shield, a nozzle body and a vortex assembly. The heat shield is internally provided with a cavity, and the side wall of the heat shield is provided with a first through hole and a second through hole, which are communicated with the cavity to form a channel; the nozzle body is partially arranged in the cavity, and the outlet end of the nozzle body is communicated with the outside through the second through hole; the vortex assembly is arranged in the channel and located between the first through hole and the second through hole, and is used for forming gas turbulence and gas vortex. The present application solves the defect that the atomizing effect of the existing atomizing nozzle on fuel is limited, and realizes a centrifugal atomizing nozzle with preposed vortex assembly. After the airflow passes through the vortex assembly, the airflow is rotated, the fuel is atomized, and the atomizing performance, ignition performance and flame stability of the combustion chamber of the aero-engine are improved.

Description

Technical Field

[0001] This invention relates to the field of engine technology, and more particularly to a centrifugal atomizing nozzle with a swirling front. Background Technology

[0002] Combustion chamber ignition and stable combustion are among the key steps in the operation of aero-engines, directly affecting their reliability and safety. Successful ignition and flame stability are the most basic and important technical requirements for all aero-engines. Many factors affect combustion chamber ignition and flame stability. From a state parameter perspective, these mainly include combustion chamber inlet temperature, pressure, airflow, and ignition energy. From a design parameter perspective, these mainly include fuel atomization quality, flow field structure, and fuel mist distribution.

[0003] Traditional centrifugal atomizing nozzles with heat shields have small air intake holes machined on the heat shield. The airflow enters the combustion chamber through two channels and flows into the small holes. It mixes with the fuel at the outlet of the centrifugal atomizing nozzle and then burns in the flame tube.

[0004] However, traditional centrifugal atomizing nozzles with heat shields only atomize fuel through the interaction between the internal swirler and the small orifice at the nozzle opening, which has limited improvement on the fuel atomization effect. Summary of the Invention

[0005] This invention provides a centrifugal atomizing nozzle with a vortex front, which solves the problem that the existing technology only relies on the interaction between the internal vortex generator and the nozzle orifice to atomize fuel, resulting in limited improvement in fuel atomization effect. The invention realizes a centrifugal atomizing nozzle with a vortex generator assembly in front, where the airflow generates a swirling airflow after passing through the vortex generator assembly, atomizing the fuel and improving the atomization performance, ignition performance and flame stability of the aero-engine combustion chamber.

[0006] This invention provides a centrifugal atomizing nozzle with a pre-swirling flow configuration, comprising:

[0007] The heat insulation cover has an internal cavity, and the side wall of the heat insulation cover has a first through hole and a second through hole, which are connected to the cavity.

[0008] The nozzle body is partially disposed inside the cavity, and the outlet end of the nozzle body is connected to the outside through the second through hole;

[0009] A vortex assembly is disposed inside the cavity and located between the first through hole and the second through hole, for forming gas turbulence and gas vortex.

[0010] According to the present invention, a centrifugal atomizing nozzle with a vortex pre-positioned vortex assembly includes:

[0011] A first vortex generator is disposed between the outer wall of the nozzle body and the inner wall of the cavity. The first vortex generator is provided with a plurality of first vortex holes, which are arranged in a circular interval.

[0012] The second vortex generator is disposed between the nozzle body and the inner wall of the cavity, and is spaced vertically from the first vortex generator; the second vortex generator is provided with a plurality of second vortex holes, which are arranged in a circular interval.

[0013] The rotation direction of the first vortex hole is opposite to that of the second vortex hole.

[0014] According to the present invention, a centrifugal atomizing nozzle with a swirling front is provided, wherein the first vortex generator further includes a first vortex plate, the first vortex hole is disposed on the first vortex plate, and two first vortex plates are provided, the two first vortex plates surround the outer periphery of the nozzle body, and the outer periphery of the two first vortex plates is connected to the inner wall of the cavity.

[0015] According to the present invention, a centrifugal atomizing nozzle with a swirling front is provided, wherein the second vortex generator further includes a second vortex plate, the second vortex hole is disposed on the second vortex plate, and two second vortex plates are provided, the two second vortex plates surround the outer periphery of the nozzle body, and the outer periphery of the two second vortex plates is connected to the inner wall of the cavity.

[0016] According to the present invention, a centrifugal atomizing nozzle with a swirling front is provided, wherein the nozzle body includes a first conduit, the first conduit passing through the nozzle body connection portion and partially extending into the cavity;

[0017] The nozzle body connecting part is provided with a limiting part, and the nozzle body connecting part is sealed to the heat insulation cover through the limiting part;

[0018] The first conduit has a first flow channel inside, and the first vortex generator and the second vortex generator are both located between the outer wall of the first conduit and the inner wall of the cavity.

[0019] According to the present invention, a centrifugal atomizing nozzle with a swirling front is provided, wherein a second conduit is provided at one end of the first conduit outside the cavity, and a second flow channel is provided inside the second conduit, and the second flow channel is connected to the first flow channel.

[0020] According to the present invention, a centrifugal atomizing nozzle with a pre-swirling flow is provided, wherein the first conduit is provided with a swirler at one end inside the cavity, and the outlet of the swirler is located at the second through hole.

[0021] According to the present invention, a centrifugal atomizing nozzle with a swirling front is provided, wherein the outer wall of the first conduit is provided with a first limiting groove and a second limiting groove spaced apart vertically, and the first vortex generator and the second vortex generator are respectively limited in the first limiting groove and the second limiting groove.

[0022] According to the present invention, a centrifugal atomizing nozzle with a swirling front is provided, wherein the heat insulation cover includes a heat insulation cover body, the top end of the heat insulation cover body is provided with a heat insulation cover connecting part, the heat insulation cover connecting part is connected to the nozzle body connecting part, the cavity is located inside the heat insulation cover body, the first through hole is located in the upper middle part of the outer side of the heat insulation cover body, and the second through hole is located in the bottom outer side of the heat insulation cover body.

[0023] According to the present invention, a centrifugal atomizing nozzle with a swirling front is provided, wherein the heat insulation cover connection part is provided with an opening in the middle, and the limiting part is sealed to the opening.

[0024] The above-described one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0025] The present invention has a vortex component inside the cavity of the heat insulation cover. When the gas passes through the vortex component, it can generate gas turbulence and gas vortex. The gas turbulence and gas vortex can increase the contact area and diffusion speed between fuel and air in the fuel nozzle, further atomize the fuel, and thus better promote the ignition and combustion of the fuel. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is an exploded view of the centrifugal atomizing nozzle with swirl pre-positioned according to the present invention;

[0028] Figure 2 This is an assembly diagram of the centrifugal atomizing nozzle with a pre-swirling flow provided by the present invention;

[0029] Figure 3 This is a cross-sectional view of the centrifugal atomizing nozzle with swirl front provided by the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the first vortex generator of the centrifugal atomizing nozzle with swirling front provided by the present invention;

[0031] Figure 5This is a schematic diagram of the structure of the second vortex generator of the centrifugal atomizing nozzle with swirling front provided by the present invention.

[0032] Figure label:

[0033] 100: Heat insulation cover; 110: Heat insulation cover body; 111: First through hole; 112: Second through hole; 120: Heat insulation cover connecting part; 121: Opening; 122: First connecting hole;

[0034] 200: Nozzle body; 210: Nozzle body connecting part; 211: Limiting part; 212: Second connecting hole; 220: First guide tube; 221: First flow channel; 222: First limiting groove; 223: Second limiting groove; 230: Swirl generator; 240: Second guide tube; 241: Second flow channel;

[0035] 300: Vortex assembly; 310: First vortex generator; 311: First vortex hole; 312: First limiting port; 313: First vortex plate; 320: Second vortex generator; 321: Second vortex hole; 322: Second limiting port; 323: Second vortex plate. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0037] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "first" and "second" are used to clearly indicate the product components and do not represent any substantial difference. The directions of "upper" and "lower" are based on the directions shown in the accompanying drawings. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances. Furthermore, "multiple" means two or more. In the specification, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] Figure 1 An exploded view of the centrifugal atomizing nozzle with swirl pre-positioned as provided in an embodiment of the present invention is shown; Figure 2 An assembly diagram of a centrifugal atomizing nozzle with a swirl front provided in an embodiment of the present invention is illustrated.

[0040] Reference Figure 1 and Figure 2 The present invention provides a centrifugal atomizing nozzle with a swirling front, comprising a heat insulation cover 100, a nozzle body 200, and a vortex assembly 300. The heat insulation cover 100 has an internal cavity, and its sidewalls have a first through hole 111 and a second through hole 112, which are connected to the cavity to form a channel. A portion of the nozzle body 200 is located inside the cavity, and its outlet end communicates with the outside through the second through hole 112. The vortex assembly 300 is located within the channel, between the first through hole 111 and the second through hole 112, and is used to generate gas turbulence and gas vortices.

[0041] In the above structure, by placing a portion of the nozzle body 200 inside the heat shield 100, this portion of the nozzle body 200 can be isolated from the high-temperature combustion gas inside the flame tube, thus protecting it and enabling the invention to operate in a high-temperature environment. Secondly, by providing a first through hole 111 and a second through hole 112 on the side wall of the heat shield 100, both form a channel with the cavity. This channel provides a directional flow path for the gas, guiding it to the outlet end of the nozzle body 200, allowing it to mix with the fuel inside the nozzle body 200, thereby ensuring more complete combustion of the fuel.

[0042] Furthermore, a vortex assembly 300 is provided in the middle of the channel. When gas passes through the vortex assembly 300, it generates gas turbulence and gas vortices. These turbulence and vortices increase the contact area and diffusion velocity between fuel and air in the fuel nozzle, thereby better promoting fuel ignition and combustion. The design and arrangement of the vortex assembly can also adjust the distribution and transmission path of ignition energy, helping to provide uniform and stable ignition energy and maintain stable combustion. Moreover, traditional centrifugal atomizing nozzles require complex fuel circuits to improve fuel atomization, resulting in a thicker nozzle and increased manufacturing costs. This invention, however, simplifies the nozzle structure and reduces its weight while enhancing fuel atomization.

[0043] It should be noted that in this embodiment, the heat shield 100 is made of high-temperature resistant materials, specifically ultra-high temperature alloys made of materials such as nickel, cobalt, and iron. Multiple first through holes 111 can be provided, allowing gas to enter the cavity from multiple points, increasing the gas flow rate into the cavity. Multiple first through holes 111 are evenly spaced on the outer periphery of the heat shield 100, a design that ensures more uniform gas entry into the cavity. The gas flow path is as follows: entering the cavity from the first through hole 111, then passing through the vortex assembly 300 to form gas turbulence and gas vortices, and then the gas turbulence and gas vortices mix with the fuel injected from inside the nozzle body 200 at the nozzle body 200 outlet, and burn within the flame tube.

[0044] Secondly, the connection between the heat shield 100 and the nozzle body 200 must be airtight to prevent gas leakage and provide a stable flow path with a defined direction for the gas. The vortex assembly 300 can be fixedly installed inside the cavity or detachably installed inside the cavity. It should be noted that when the vortex assembly 300 is detachably installed inside the cavity, it must be securely installed to prevent it from shaking due to airflow, which would affect the stability of the airflow.

[0045] Reference Figure 1In some embodiments of the present invention, the vortex assembly 300 includes a first vortex generator 310 and a second vortex generator 320. The first vortex generator 310 is disposed between the outer wall of the nozzle body 200 and the inner wall of the cavity, and has a plurality of first vortex holes 311 arranged in a circular interval. The second vortex generator 320 is disposed between the nozzle body 200 and the inner wall of the cavity, and is vertically spaced from the first vortex generator 310. The second vortex generator 320 has a plurality of second vortex holes 321 arranged in a circular interval. The rotation direction of the first vortex holes 311 is opposite to that of the second vortex holes 321. It should be noted that the vortex assembly 300 is not limited to the first vortex generator 310 and the second vortex generator 320, and may also include a third vortex generator, a fourth vortex generator, etc. The number of vortices in the vortex assembly is not specifically limited, as long as the rotation directions of adjacent vortices are opposite.

[0046] The first vortex generator 310 can be a single-stage oblique-hole vortex generator, and the second vortex generator 320 can be a single-stage axial-blade vortex generator. It is understood that multiple first vortex holes 311 and multiple second vortex holes 321 each combine to form a closed ring. The first vortex generator 310 can be positioned above the second vortex generator 320, or the second vortex generator 320 can be positioned above the first vortex generator 310. Regarding the rotation direction of the first vortex holes 311 and the second vortex holes 321, there are at least two possible schemes: Scheme 1: The first vortex hole 311 rotates clockwise, while the second vortex hole 321 rotates counterclockwise; Scheme 2: The first vortex hole 311 rotates counterclockwise, while the second vortex hole 321 rotates clockwise.

[0047] Specifically, the cavity is a cylindrical structure, the nozzle body 200 is also cylindrical, and the first vortex generator 310 and the second vortex generator 320 are both annular structures. The nozzle body 200 is located at the center of the cavity, and the outer wall of the nozzle body 200 and the inner wall of the cavity form an annular cavity. The first vortex generator 310 and the second vortex generator 320 are arranged vertically and horizontally inside the annular cavity. That is, the first vortex generator 310 and the second vortex generator 320 are also annular structures. The inner rings of the first vortex generator 310 and the second vortex generator 320 are sealed to the nozzle body 200, and the outer rings of the first vortex generator 310 and the second vortex generator 320 are sealed to the inner wall of the cavity, thus allowing gas to pass only through the first vortex generator 310 and the second vortex generator 320. The first vortex generator 310 is provided with multiple first vortex holes 311, which are inclinedly arranged on the first vortex generator 310, forming a clockwise rotation. The second vortex generator 320 is provided with multiple second vortex holes 321, which are also inclinedly arranged on the second vortex generator 320, forming a counterclockwise rotation. When the airflow passes through the first vortex holes 311 and the second vortex holes 321, gas turbulence and gas vortices are formed. By designing the rotation directions of the first vortex holes 311 and the first limiting port 312 to be opposite, it is beneficial to generate a larger shear force and increase the turbulence of the outlet gas.

[0048] It should be noted that the number and direction of rotation of the first vortex orifice 311 and the second vortex orifice 321 can be designed according to actual conditions. By designing the number, direction of rotation, and channel area of ​​the first vortex orifice 311 and the second vortex orifice 321, the atomization performance, ignition performance, and flame stability of the combustion chamber can be adjusted to achieve an ideal state. Secondly, the intensity of the vortex can be controlled by adjusting the distance between the heat shield body 110 and the heat shield connection part 120.

[0049] Figure 4 A schematic diagram of the structure of the first vortex generator of the centrifugal atomizing nozzle with swirling front provided in an embodiment of the present invention is illustrated. Figure 5 A schematic diagram of the structure of the second vortex generator of the centrifugal atomizing nozzle with swirling front provided in an embodiment of the present invention is illustrated.

[0050] Reference Figure 4 In some embodiments of the present invention, the first vortex generator 310 further includes a first vortex plate 313, a first vortex hole 311 disposed on the first vortex plate 313, and two first vortex plates 313 are provided, the two first vortex plates 313 surrounding the outer periphery of the nozzle body 200, and the outer periphery of the two first vortex plates 313 being connected to the inner wall of the cavity. Specifically, the first vortex hole 311 can be a hole with a circular or elliptical cross-section.

[0051] It is understood that the first vortex generator 310 is composed of two first vortex plates 313, each of which is a semi-circular structure with a first limiting port 312 at its center. The size of the first limiting port 312 matches the outer diameter of the nozzle body 200, so that when the two first vortex plates 313 are joined together, that is, when the two first limiting ports 312 are joined together, they can precisely surround the outside of the nozzle body 200. By designing the first vortex generator 310 as two first vortex plates 313, it is easy to install. During installation, simply surround the two first vortex plates 313 with the outer wall of the nozzle body 200 and then fix them by welding. The outer periphery of the first vortex plate 313 also fits the inner wall of the cavity, so that after installation, its outer periphery is tightly against the inner wall of the cavity. The two can also be fixed by welding.

[0052] Reference Figure 5 In some embodiments of the present invention, the second vortex generator 320 further includes a second vortex plate 323, and a second vortex hole 321 is disposed on the second vortex plate 323. Two second vortex plates 323 are provided, and the two second vortex plates 323 surround the outer periphery of the nozzle body 200, with the outer periphery of the two second vortex plates 323 connected to the inner wall of the cavity. Specifically, the second vortex hole 321 can have a polygonal inlet structure, with a guide plate inclinedly disposed within the hole.

[0053] It is understood that the second vortex generator 320 is composed of two second vortex plates 323, each of which is a semi-circular structure with a second limiting port 322 at its center. The size of the second limiting port 322 matches the outer diameter of the nozzle body 200, so that when the two second vortex plates 323 are joined together, that is, when the two second limiting ports 322 are joined together, they can precisely surround the outside of the nozzle body 200. By designing the second vortex generator 320 as two second vortex plates 323, it is easy to install. During installation, simply surround the two second vortex plates 323 with the outer wall of the nozzle body 200 and then fix them by welding. The outer periphery of the second vortex plate 323 also fits the inner wall of the cavity, so that after installation, its outer periphery is tightly against the inner wall of the cavity. Alternatively, the two can be fixed by welding.

[0054] Figure 3 A cross-sectional view of a centrifugal atomizing nozzle with a swirling front provided in an embodiment of the present invention is illustrated.

[0055] Reference Figure 3In some embodiments of the present invention, the nozzle body 200 includes a first conduit 220, which penetrates the nozzle body connecting portion 210 and extends partially into the cavity; the nozzle body connecting portion 210 is provided with a limiting portion 211, and the nozzle body connecting portion 210 is sealed to the heat insulation cover 100 through the limiting portion 211; the interior of the first conduit 220 is provided with a first flow channel 221, and the first vortex 310 and the second vortex 320 are both located between the outer wall of the first conduit 220 and the inner wall of the cavity; the first conduit 220 is provided with a second conduit 240 at one end outside the cavity, and the interior of the second conduit 240 is provided with a second flow channel 241, which communicates with the first flow channel 221.

[0056] It is understood that the first conduit 220 passes through the middle of the limiting part 211 and is fixedly connected to the limiting part 211. Then, the heat shield 100 is connected to the nozzle body connecting part 210, so that the first conduit 220 is located inside the cavity, protecting the first conduit 220 from the influence of high temperature. The limiting part 211 is provided in the middle of the nozzle body connecting part 210 and on the side facing the heat shield 100. The nozzle body 200 also passes through the limiting part 211 and is sealed to the limiting part 211. Second connecting holes 212 are also provided on both sides of the nozzle body connecting part 210, which can be connected to the heat shield 100. Specifically, the second connecting holes 212 are threaded holes, and the nozzle body connecting part 210 and the heat shield 100 are connected by bolts. The function of the limiting part 211 is to allow fuel to flow.

[0057] Reference Figure 1 In some embodiments of the present invention, the first conduit 220 is provided with a cyclone separator 230 at one end inside the cavity, and the outlet of the cyclone separator 230 is located at the second through hole 112.

[0058] Specifically, the outlet end of the first conduit 220 has a certain bend, which causes the fuel to be sprayed out at an angle, thus allowing it to flow at a predetermined angle. Fuel enters the first conduit 220 and, after reaching the position of the cyclone separator 230, is initially atomized by the centrifugal force generated by the cyclone separator 230. It is then mixed with the swirling airflow at the outlet of the second vortex separator 320, further atomizing the fuel before it enters the flame tube to complete ignition and combustion.

[0059] Reference Figure 1 In some embodiments of the present invention, the outer wall of the first conduit 220 is provided with a first limiting groove 222 and a second limiting groove 223 at intervals above and below, and the first vortex generator 310 and the second vortex generator 320 are respectively limited in the first limiting groove 222 and the second limiting groove 223.

[0060] Specifically, the first limiting groove 222 and the second limiting groove 223 can be fixedly installed on the first vortex generator 310 and the second vortex generator 320 one-to-one by welding. By setting the first limiting groove 222 and the second limiting groove 223, it can be ensured that the first vortex generator 310 and the second vortex generator 320 maintain precise positions at specific locations, thereby improving the installation accuracy and stability of the entire device. This prevents the first vortex generator 310 and the second vortex generator 320 from moving excessively during use, thus preventing airflow disturbance.

[0061] Reference Figure 1 In some embodiments of the present invention, the heat insulation cover 100 includes a heat insulation cover body 110, a heat insulation cover connecting part 120 is provided at the top of the heat insulation cover body 110, the heat insulation cover connecting part 120 is connected to the nozzle body connecting part 210, the cavity is located inside the heat insulation cover body 110, the first through hole 111 is located in the upper middle part of the outer side of the heat insulation cover body 110, and the second through hole 112 is located in the bottom outer side of the heat insulation cover body 110.

[0062] Specifically, the heat shield body 110 has a cylindrical structure with an arc-shaped bottom, and the second through hole 112 is located on the side of the arc-shaped structure. After the gas and air are mixed, the mixture is ejected through the second through hole 112 for combustion. The heat shield connecting part 120 is matched with the nozzle body connecting part 210, and the heat shield connecting part 120 has a first connecting hole 122, which corresponds to the second connecting hole 212. The first connecting hole 122 can be a threaded hole. When connecting the heat shield connecting part 120 and the nozzle body connecting part 210, the second connecting hole 212 can be aligned with the first connecting hole 122, and then the two can be connected by bolts.

[0063] Reference Figure 1 In some embodiments of the present invention, the heat insulation cover connecting portion 120 is provided with an opening 121 in the middle, and the limiting portion 211 is sealed to the opening 121. When the nozzle body connecting portion 210 and the heat insulation cover connecting portion 120 are connected, the limiting portion 211 can be inserted into the opening 121, and in order to ensure the airtightness of the connection, a sealing ring can be provided between the two.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A centrifugal atomizing nozzle with a pre-swirling flow, characterized in that, include: The heat shield (100) has an internal cavity, and the side wall of the heat shield (100) has a first through hole (111) and a second through hole (112), which are connected to the cavity; The nozzle body (200) is partially disposed inside the cavity, and the outlet end of the nozzle body (200) is connected to the outside through the second through hole (112); A vortex assembly (300) is disposed inside the cavity and located between the first through hole (111) and the second through hole (112) for forming gas turbulence and gas vortex; The eddy current assembly (300) includes: The first vortex generator (310) is disposed between the outer wall of the nozzle body (200) and the inner wall of the cavity. The first vortex generator (310) is provided with a plurality of first vortex holes (311), which are arranged in a circular interval. The second vortex generator (320) is disposed between the nozzle body (200) and the inner wall of the cavity, and is spaced vertically from the first vortex generator (310); the second vortex generator (320) is provided with a plurality of second vortex holes (321), and the plurality of second vortex holes (321) are arranged in a circular interval. The rotation direction of the first vortex hole (311) is opposite to that of the second vortex hole (321).

2. The centrifugal atomizing nozzle with pre-swirling flow according to claim 1, characterized in that, The first vortex generator (310) further includes a first vortex plate (313), the first vortex hole (311) is disposed on the first vortex plate (313), there are two first vortex plates (313), the two first vortex plates (313) surround the outer periphery of the nozzle body (200), and the outer periphery of the two first vortex plates (313) is connected to the inner wall of the cavity.

3. The centrifugal atomizing nozzle with pre-swirling flow according to claim 1, characterized in that, The second vortex generator (320) further includes a second vortex plate (323), and a second vortex hole (321) is disposed on the second vortex plate (323). There are two second vortex plates (323), and the two second vortex plates (323) surround the outer periphery of the nozzle body (200), and the outer periphery of the two second vortex plates (323) is connected to the inner wall of the cavity.

4. The centrifugal atomizing nozzle with pre-swirling flow according to claim 1, characterized in that, The nozzle body (200) includes a first conduit (220), which penetrates the nozzle body connection portion (210) and extends partially into the cavity. The nozzle body connecting part (210) is provided with a limiting part (211), and the nozzle body connecting part (210) is sealed to the heat insulation cover (100) through the limiting part (211); The first conduit (220) has a first flow channel (221) inside, and the first vortex (310) and the second vortex (320) are both located between the outer wall of the first conduit (220) and the inner wall of the cavity.

5. The centrifugal atomizing nozzle with pre-swirling flow according to claim 4, characterized in that, The first conduit (220) is located outside the cavity and has a second conduit (240) at one end. The second conduit (240) has a second flow channel (241) inside and the second flow channel (241) is connected to the first flow channel (221).

6. The centrifugal atomizing nozzle with pre-swirling flow according to claim 4, characterized in that, The first conduit (220) is located inside the cavity and has a cyclone separator (230) at one end. The outlet of the cyclone separator (230) is located in the second through hole (112).

7. The centrifugal atomizing nozzle with pre-swirling flow according to claim 4, characterized in that, The outer wall of the first conduit (220) is provided with a first limiting groove (222) and a second limiting groove (223) spaced apart vertically. The first vortex generator (310) and the second vortex generator (320) are respectively limited in the first limiting groove (222) and the second limiting groove (223).

8. The centrifugal atomizing nozzle with pre-swirling flow according to claim 4, characterized in that, The heat shield (100) includes a heat shield body (110), the top of the heat shield body (110) is provided with a heat shield connecting part (120), the heat shield connecting part (120) is connected to the nozzle body connecting part (210), the cavity is located inside the heat shield body (110), the first through hole (111) is located in the upper middle part of the outer side of the heat shield body (110), and the second through hole (112) is located in the bottom outer side of the heat shield body (110).

9. The centrifugal atomizing nozzle with pre-swirling flow according to claim 8, characterized in that, The heat insulation cover connecting part (120) has an opening (121) in the middle, and the limiting part (211) is sealed to the opening (121).

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