Swirl injection structure, swirl nozzle, exhaust gas aftertreatment device, and vehicle

Abstract

The utility model relates to a tail gas treatment technical field, specifically disclose a cyclone jet structure, cyclone nozzle, tail gas aftertreatment device and vehicle, cyclone jet structure includes valve core and valve seat, and valve core sets up first cooperation structure, and valve core sets up in valve seat, along the jet direction of liquid flow, and valve seat sets up second cooperation structure, jet channel and jet mouth, first cooperation structure and second cooperation structure jointly form cyclone chamber, and jet channel communicates with cyclone chamber, and jet mouth communicates with jet channel, and cyclone chamber is used for making liquid flow inside it spiral advance towards jet channel, and at least one of first cooperation structure and second cooperation structure is provided with plane. The volume of cyclone chamber is promoted, can effectively steady pressure to liquid flow, makes the air nucleus formed more stable, reduces the shaking, thereby makes the jet quantity more stable.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas treatment technology, and in particular to a swirling jet structure, a swirling nozzle, an exhaust gas aftertreatment device, and a vehicle. Background Technology

[0002] Atomizing nozzles are widely used in various fields to atomize and spray liquid streams. The most common type is the centrifugal nozzle, often a swirling nozzle. This involves supplying two or more liquid streams simultaneously, which rotate in the same direction inside the nozzle. After being accelerated by the swirling chamber, the liquid streams are finally ejected from the nozzle orifice in a conical spray pattern. During this process, the liquid stream spirals forward within the swirling chamber and experiences radial acceleration outward from the nozzle, inevitably leading to the formation of air nuclei.

[0003] In related technologies, the valve core and valve seat of the swirling nozzle cooperate to form a swirling chamber. The liquid flow entering the swirling chamber is affected by factors such as the shape, volume, surface roughness of the swirling chamber, pressure fluctuations of the supply system, and pipeline layout. Its pressure is unstable, which causes the air nuclei formed in the swirling chamber to continuously vibrate. That is, the size and position of the air nuclei continuously change within a certain range, ultimately leading to unstable nozzle spray volume. Utility Model Content

[0004] The purpose of this invention is to provide a swirling jet structure, a swirling nozzle, an exhaust aftertreatment device, and a vehicle to solve the problem of unstable injection volume caused by continuous vibration of the air core.

[0005] This utility model provides a swirling jet structure, including:

[0006] Valve core, wherein the valve core is provided with a first mating structure;

[0007] The valve seat has a valve core disposed inside it. Along the direction of liquid flow injection, the valve seat is provided with a second mating structure, an injection channel, and an injection port. The first mating structure and the second mating structure together form a swirling chamber. The injection channel is connected to the swirling chamber, and the injection port is connected to the injection channel. The rotating liquid flow can spiral forward toward the injection channel inside the swirling chamber.

[0008] At least one of the first mating structure and the second mating structure is provided with a plane.

[0009] As a preferred technical solution of the swirling jet structure, along the jetting direction of the liquid flow, the second mating structure is provided with a connected sealing section and a groove section, the valve core can abut against the sealing section, and the groove of the groove section is connected to the jetting channel.

[0010] As a preferred technical solution for the swirling jet structure, the first mating structure is provided with a convex spherical surface protruding toward the second mating structure, and the groove is a flat-bottomed groove. The convex spherical surface and the inner surface of the flat-bottomed groove together form the swirling chamber.

[0011] As a preferred technical solution for the swirling jet structure, the valve core is a spherical cap valve core, the first mating structure has a plane, the groove is a spherical groove, and the plane and the inner surface of the spherical groove together form the swirling chamber.

[0012] As a preferred technical solution for the swirling jet structure, the valve core is a spherical cap valve core, the first mating structure has a plane, the groove is a flat-bottomed groove, and the plane and the inner surface of the flat-bottomed groove together form the swirling chamber.

[0013] As a preferred technical solution for the swirling jet structure, the valve core is a spherical cap valve core, the first mating structure is provided with a concave spherical surface, the groove is a flat-bottomed groove, and the inner surface of the concave spherical surface and the flat-bottomed groove together form the swirling chamber.

[0014] As a preferred technical solution for the swirling jet structure, the length-to-diameter ratio of the jet channel is 1-2.5, and / or the cone angle of the jet nozzle is 80°-100°.

[0015] This utility model provides a swirling nozzle, including the swirling jet structure of any of the above-mentioned schemes.

[0016] This utility model provides an exhaust gas aftertreatment device, including the swirl nozzle of the above-mentioned solution.

[0017] This utility model provides a vehicle that includes the exhaust aftertreatment device of the above-described scheme.

[0018] The beneficial effects of this utility model are as follows:

[0019] This invention provides a swirling jet structure. By setting at least one of the first and second mating structures that make up the swirling chamber as a plane, the air core formed in the corresponding swirling chamber experiences less vibration and is more stable compared to the air core formed in the swirling chamber in the prior art, thereby making the jet volume more stable.

[0020] This invention provides a swirling nozzle, which, by setting the swirling jet structure of this invention, makes the jet volume of the swirling nozzle more stable.

[0021] This invention provides an exhaust gas aftertreatment device. By setting the swirl nozzle of this invention, the urea injection volume of the exhaust gas aftertreatment device is more stable, thereby ensuring the emission performance of the engine.

[0022] This invention provides an engine that ensures engine emission performance by incorporating the swirl nozzle or the exhaust aftertreatment device of this invention. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the swirling jet structure in Embodiment 1 of this utility model;

[0024] Figure 2 This is a cross-sectional view of the swirling jet structure in Embodiment 2 of this utility model;

[0025] Figure 3 This is a cross-sectional view of the swirling jet structure in Embodiment 3 of this utility model;

[0026] Figure 4 This is a cross-sectional view of the swirling jet structure in Embodiment 4 of this utility model.

[0027] In the picture:

[0028] 1. Valve core; 11a. Convex spherical surface; 11b. Flat surface; 11c. Concave spherical surface;

[0029] 2. Valve seat; 21. Sealing section; 22a. Spherical groove; 22b. Flat-bottomed groove; 23. Injection channel; 24. Injection port. Detailed Implementation

[0030] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model according to the specific circumstances.

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] The swirling jet structure in related technologies includes a valve core and a valve seat, with the valve core mating with the valve seat. The valve seat has multiple inlet channels for liquid flow. Multiple liquid streams enter the valve seat through these channels and impact the lower half of the valve core. Under the action of the valve core, the multiple liquid streams converge and rotate around the valve seat's axis, simultaneously lifting the valve core to a certain height. The rotating liquid then enters the swirling chamber, spiraling towards the jet channel before finally being ejected. However, the air nucleus formed within this swirling chamber continuously vibrates; that is, the size and position of the air nucleus continuously change within a certain range, ultimately leading to unstable jet volume from the nozzle.

[0035] Example 1

[0036] like Figure 1 As shown, this utility model provides a swirling jet structure, including a valve core 1 and a valve seat 2. The valve core 1 has a spherical structure or the lower part of the valve core 1 is configured as a spherical structure. The valve core 1 is provided with a first mating structure and is disposed inside the valve seat 2. Along the jetting direction of the liquid flow, the valve seat 2 is provided with a second mating structure, a jetting channel 23, and a jetting port 24. The first and second mating structures together form a swirling chamber. The jetting channel 23 communicates with the swirling chamber, and the jetting port 24 communicates with the jetting channel 23. The swirling chamber is used to cause the liquid flow to spiral forward toward the jetting channel 23 within its interior. At least one of the first and second mating structures is provided with a plane. Compared with the swirling chambers in the prior art, the air nucleus formed in the swirling chamber formed by the first and second mating structures experiences less vibration and is more stable, thereby making the jetting volume more stable.

[0037] Furthermore, along the injection direction of the liquid flow, the second mating structure is provided with a connected sealing section 21 and a groove section, and the diameter of the sealing section 21 gradually decreases along the injection direction of the liquid flow. The valve core 1 can abut against the sealing section 21. A portion of the valve core 1 is located within the space enclosed by the sealing section 21, and the groove of the groove section communicates with the injection channel 23. By setting a portion of the valve core 1 to be located within the space enclosed by the sealing section 21, even after the rotating liquid flow lifts the valve core 1, a portion of the valve core 1 remains within the space enclosed by the sealing section 21. This allows the liquid flow to enter the vortex chamber more smoothly under the guidance of the valve core 1, avoiding increased pressure fluctuations in the liquid flow.

[0038] Specifically, the first mating structure has a convex spherical surface 11a protruding towards the second mating structure, and a flat-bottomed groove 22b. The inner surfaces of the convex spherical surface 11a and the flat-bottomed groove 22b together form a vortex chamber. That is, in this embodiment, the second mating structure has a plane. The valve core 1 is a complete spherical structure, and the convex spherical surface 11a is part of the outer surface of the valve core 1. According to simulation verification and actual verification, compared with the vortex chamber of the convex spherical surface 11a and the spherical groove 22a in the prior art, the vibration amplitude and vibration range of the gas nucleus formed by the vortex chamber of the convex spherical surface 11a and the flat-bottomed groove 22b in this embodiment are significantly reduced, and the stability of the injection volume of the injection port 24 is significantly improved. In this embodiment, the flat-bottomed groove 22b is a cylindrical groove. It can be understood that when the depth of the flat-bottomed groove 22b is equal to the depth of the spherical groove 22a in the prior art, the volume of the flat-bottomed groove 22b is larger, thereby forming a larger swirling chamber, which can further suppress the pressure fluctuation of the liquid flow, make the formed air core more stable, reduce shaking, and thus make the injection volume more stable.

[0039] Furthermore, the cone angle of the sealing section 21 is 110°-130°, for example, the cone angle of the sealing section 21 can be 110°, 111°, 112°, 113°, 114°, 115°, 116°, 117°, 118°, 119°, 120°, 121°, 122°, 123°, 124°, 125°, 126°, 127°, 128°, 129° or 130°. In this embodiment, the cone angle of the sealing section 21 is preferably 120 degrees to balance sealing performance and allow the liquid flow to smoothly enter the vortex chamber. In addition, those skilled in the art can also change the cone angle of the sealing section 21 according to the actual engineering needs, which will not be specifically illustrated here.

[0040] Furthermore, the aspect ratio of the injection channel 23 is 1-2.5, and / or the cone angle of the injection port 24 is 80°-100°. The injection channel 23 is a cylindrical structure with an aspect ratio of 1-2.5. For example, the aspect ratio of the injection channel 23 can be 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, or 2.5. In this embodiment, the aspect ratio of the injection channel 23 is preferably 1.5, so that the liquid flow can fully adjust its motion posture during the process of passing through the injection channel 23, in order to ensure a better atomization effect.

[0041] Along the jetting direction of the liquid flow, the diameter of the jet nozzle 24 gradually increases, and the cone angle of the jet nozzle 24 is 80°-100°. For example, the cone angle of the jet nozzle 24 can be 80°, 81°, 82°, 83°, 84°, 85°, 86°, 87°, 88°, 89°, 90°, 91°, 92°, 93°, 94°, 95°, 96°, 97°, 98°, 99°, or 100°. In this embodiment, the cone angle of the jet nozzle 24 is preferably 90 degrees, so that the jetting liquid flow is fully broken and atomized under the combined action of centrifugal force and air, ensuring a good atomization effect.

[0042] It should be noted that the cone angle of the sealing section 21, the length-to-diameter ratio of the injection channel 23, and the cone angle of the injection port 24 are not independent of each other. Those skilled in the art can selectively adjust some or all of them according to actual engineering needs to obtain different parameter combinations to meet the corresponding engineering requirements. It is impossible to list all the combinations here, so they will not be elaborated further.

[0043] In this embodiment, the swirling jet structure lifts the valve core 1 into the swirling chamber during liquid injection, where it accelerates and generates an air nucleus. The liquid then passes through the injection channel 23 and the nozzle, where it is atomized and ejected. The air nucleus occupies a portion of the swirling chamber's volume. Furthermore, due to factors such as surface roughness, supply system pressure fluctuations, and pipeline layout, the pressure of the liquid entering the swirling chamber varies irregularly. This pressure variation causes the air nucleus to vibrate, meaning its position and size change irregularly, resulting in inconsistent injection volume at the final injection port 24, which is detrimental to precise control. This embodiment addresses this by modifying the swirling chamber's structure. Without altering the dimensions of the valve core 1 and valve seat 2, the swirling chamber is designed to suppress liquid pressure variations within a certain range, thereby suppressing or eliminating air nucleus vibration and ultimately ensuring a stable injection volume at the injection port 24.

[0044] This invention provides a swirling nozzle, including the swirling injection structure in this embodiment. By setting the swirling injection structure in this embodiment, the injection volume of the injection device is more stable. The injection device can be applied in various fields that require atomized injection and stable injection volume control, such as fuel injectors in engines, urea nozzles in exhaust aftertreatment systems, or atomizing nozzles in the chemical industry.

[0045] This utility model provides an exhaust gas aftertreatment device, including the swirl nozzle in this embodiment. By setting the swirl nozzle in this embodiment to spray urea liquid, the injection volume of urea liquid is more stable, thereby avoiding problems such as ammonia leakage and urea crystallization caused by excessive injection volume, and also avoiding problems such as unqualified exhaust gas treatment caused by insufficient injection volume, thus ensuring the emission performance of the engine.

[0046] This utility model provides a vehicle, including the swirl nozzle and / or the exhaust aftertreatment device of this embodiment. That is, the vehicle may only include the exhaust aftertreatment device of this embodiment to ensure emission performance. Alternatively, it may only include the swirl nozzle of this embodiment, using it as a fuel injector to ensure stable engine fuel injection and improve power performance. Or, it may include both the swirl nozzle and the exhaust aftertreatment device of this embodiment, achieving both emission performance and improved power performance.

[0047] Example 2

[0048] To avoid repetitive description, this embodiment will only describe the differences from Embodiment 1. The difference between this embodiment and Embodiment 1 is that the first mating structure in this embodiment has a plane 11b and a spherical groove 22a.

[0049] Please refer to Figure 2As shown, valve core 1 is a spherical cap valve core, and the first mating structure has a plane 11b and a groove section is a spherical groove 22a. The distance between the plane 11b and the center of the sphere of valve core 1 is less than the radius of valve core 1, that is, valve core 1 is a spherical cap valve core. In this embodiment, the first mating structure is provided with a plane. The plane 11b and the inner surface of the spherical groove 22a together form a vortex chamber. According to simulation verification and actual verification, compared with the vortex chamber of the convex spherical surface 11a and the spherical groove 22a in the prior art, the air nucleus formed by the plane 11b and the spherical groove 22a in this embodiment hardly exhibits any vibration, and the stability of the injection volume of the injection port 24 is greatly improved. In addition, compared with the prior art, the first mating structure is provided with a plane 11b, which reduces the space occupied by valve core 1 in the space enclosed by the sealing section 21, thereby increasing the volume of the vortex chamber formed, which has a certain suppressive effect on the pressure fluctuation of the liquid flow, making the formed air nucleus more stable, reducing vibration, and thus making the injection volume more stable.

[0050] Example 3

[0051] To avoid repetitive description, this embodiment will only describe the differences from Embodiment 1. The difference between this embodiment and Embodiment 1 is that the first mating structure in this embodiment has a plane 11b and the groove is set as a flat-bottomed groove 22b.

[0052] Please refer to Figure 3 As shown, valve core 1 is a spherical cap valve core. The first mating structure has a plane 11b and a groove 22b with a flat bottom. The distance between the plane 11b and the center of the sphere of valve core 1 is less than the radius of valve core 1, i.e., valve core 1 is a spherical cap valve core. The flat bottom groove 22b is a cylindrical groove. In this embodiment, both the first and second mating structures have planes, and the inner surfaces of the plane 11b and the flat bottom groove 22b together form a vortex chamber. According to simulation and actual verification, compared with the vortex chambers of the convex spherical surface 11a and the spherical groove 22a in the prior art, the gas nucleus formed by the vortex chambers of the plane 11b and the flat bottom groove 22b in this embodiment hardly experiences any vibration, and the stability of the injection volume of the injection port 24 is greatly improved. Compared with the prior art, the first mating structure has a plane 11b, which reduces the space occupied by the sealing section 21. It can be understood that when the depth of the flat bottom groove 22b is equal to the depth of the spherical groove 22a in the prior art, the volume of the flat bottom groove 22b is larger. The resulting swirling chamber has a larger volume, which has a certain suppressive effect on the pressure fluctuation of the liquid flow, making the air nucleus more stable and reducing vibration, thereby making the injection volume more stable.

[0053] Example 4

[0054] To avoid repetitive description, this embodiment will only describe the differences from Embodiment 1. The difference between this embodiment and Embodiment 1 is that the first mating structure of this embodiment is provided with a concave spherical surface 11c and the groove is set as a flat-bottomed groove 22b.

[0055] Please refer to Figure 4 As shown, valve core 1 is a spherical cap valve core. The first mating structure has a concave spherical surface 11c and a flat-bottomed groove 22b. A spherical groove is formed on valve core 1 to create the concave spherical surface 11c, i.e., valve core 1 is a spherical cap valve core. At least a portion of the concave spherical surface 11c is located within the space enclosed by the sealing section 21. The flat-bottomed groove 22b is a cylindrical groove. In this embodiment, the second mating structure has a flat surface, and the inner surfaces of the concave spherical surface 11c and the flat-bottomed groove 22b together form a vortex chamber. Compared with the prior art, the first mating structure is set as a concave spherical surface 11c, which reduces the space occupied by the sealing section 21. At the same time, the setting of the concave spherical surface 11c also helps to further increase the volume of the vortex chamber. According to simulation verification and actual verification, compared with the vortex chamber of the convex spherical surface 11a and the spherical groove 22a in the prior art, the gas nucleus formed by the vortex chamber of the concave spherical surface 11c and the flat-bottomed groove 22b in this embodiment hardly exhibits vibration, and the stability of the injection volume of the injection port 24 is greatly improved. Understandably, when the depth of the flat-bottomed groove 22b is equal to the depth of the spherical groove 22a in the prior art, the volume of the flat-bottomed groove 22b is larger. This results in a larger vortex chamber volume, which has a certain suppressive effect on pressure fluctuations in the liquid flow, making the formed air nucleus more stable, reducing vibration, and thus making the injection volume more stable.

[0056] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A swirling jet structure, characterized in that, include: Valve core (1), wherein the valve core (1) is provided with a first mating structure; Valve seat (2), the valve core (1) is disposed in the valve seat (2) along the injection direction of the liquid flow, the valve seat (2) is provided with a second mating structure, an injection channel (23) and an injection port (24), the first mating structure and the second mating structure together form a swirling chamber, the injection channel (23) is connected to the swirling chamber, the injection port (24) is connected to the injection channel (23), the rotating liquid flow can spiral forward toward the injection channel (23) inside the swirling chamber; At least one of the first mating structure and the second mating structure is provided with a plane.

2. The swirling jet structure according to claim 1, characterized in that, Along the injection direction of the liquid flow, the second mating structure is provided with a connected sealing section (21) and a groove section, the valve core (1) can abut against the sealing section (21), and the groove of the groove section is connected to the injection channel (23).

3. The swirling jet structure according to claim 2, characterized in that, The first mating structure has a convex spherical surface (11a) protruding toward the second mating structure, and the groove is a flat-bottomed groove (22b). The inner surface of the convex spherical surface (11a) and the flat-bottomed groove (22b) together form the vortex chamber.

4. The swirling jet structure according to claim 2, characterized in that, The valve core (1) is a spherical cap valve core, the first mating structure has a plane (11b), the groove is a spherical groove (22a), and the plane (11b) and the inner surface of the spherical groove (22a) together form the vortex chamber.

5. The swirling jet structure according to claim 2, characterized in that, The valve core (1) is a spherical cap valve core, the first mating structure has a plane (11b), the groove is a flat-bottomed groove (22b), and the plane (11b) and the inner surface of the flat-bottomed groove (22b) together form the vortex chamber.

6. The swirling jet structure according to claim 2, characterized in that, The valve core (1) is a spherical cap valve core, and the first mating structure is provided with a concave spherical surface (11c). The groove is a flat-bottomed groove (22b). The inner surface of the concave spherical surface (11c) and the flat-bottomed groove (22b) together form the vortex chamber.

7. The swirling jet structure according to any one of claims 1-6, characterized in that, The length-to-diameter ratio of the injection channel (23) is 1-2.5, and / or the cone angle of the injection port (24) is 80°-100°.

8. A swirling nozzle, characterized in that, Includes the swirling jet structure as described in any one of claims 1-7.

9. An exhaust gas aftertreatment device, characterized in that, Includes the swirling nozzle as described in claim 8.

10. A vehicle, characterized in that, It includes the swirl nozzle of claim 8 and / or the exhaust gas aftertreatment device of claim 9.

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