Nozzle rotational flow plate and nozzle

Abstract

The utility model relates to the technical field of atomizing nozzles, and provides a nozzle rotational flow plate which comprises a first surface and a second surface which are oppositely arranged, the first surface is provided with flow dividing holes and flow dividing channels, the inner ends of the flow dividing channels are communicated with the flow dividing holes, the outer ends of the flow dividing channels extend towards the direction of the outer edge of the rotational flow plate, and the number of the flow dividing channels is multiple. The second surface is provided with a rotational flow cavity and rotational flow channels, the inner ends of the rotational flow channels communicate with the rotational flow cavity, the outer ends of the rotational flow channels extend in the direction of the outer edge of the rotational flow plate, and the cross section areas of the rotational flow channels are gradually reduced in the direction from the outer ends to the inner ends. The rotational flow channels and the flow dividing channels are oppositely arranged and are the same in number, and transition flow channels are arranged between the outer ends of the rotational flow channels and the outer ends of the flow dividing channels. The cross section area of the rotational flow channel is gradually reduced from the outer end to the inner end, the rotational flow speed is increased, atomization and breaking are easier when flowing through the nozzle outlet, and the atomization effect of the nozzle is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of atomizing nozzles, and particularly relates to a nozzle swirl plate and a nozzle. Background Art

[0002] At present, with the promulgation of the national sixth-phase motor vehicle pollutant emission regulations, the motor vehicle pollutant emission standards have become more stringent, and the requirements for the motor vehicle after-treatment system have also increased accordingly. The urea-selective catalytic reduction technology is the main means for treating NOx pollutants at present. In order to meet the increasingly stringent pollutant emission standards, it is particularly important to improve the atomization characteristics of the urea nozzle.

[0003] In the existing pressure atomizing nozzle, the liquid kinetic energy is increased by pressurizing the liquid with a pump. The liquid with the obtained kinetic energy sprays out from the orifice in the form of a liquid film or a liquid column, and the liquid film breaks under the disturbance of the external low-speed air flow and is atomized into smaller liquid droplets. However, the atomization effect of this kind of atomizing nozzle is poor. In order to improve the atomization effect, it is necessary to increase the pressure difference between the inlet and outlet ends of the nozzle. However, this will inevitably increase the additional cost.

[0004] In order to solve the above technical problems, the utility model designs a nozzle swirl plate and a nozzle. Content of the Utility Model

[0005] The utility model provides a nozzle swirl plate and a nozzle, aiming to improve the atomization effect of the nozzle.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A nozzle swirl plate includes a first surface and a second surface which are oppositely arranged. The first surface is provided with a shunt hole and a shunt channel. The inner end of the shunt channel is communicated with the shunt hole, and the outer end extends towards the outer edge of the swirl plate. The number of the shunt channels is multiple, and the multiple shunt channels are circumferentially and uniformly distributed relative to the shunt hole. The second surface is provided with a swirl chamber and a swirl channel. The inner end of the swirl channel is communicated with the swirl chamber, and the outer end extends towards the outer edge of the swirl plate. The cross-sectional area of the swirl channel gradually decreases from the outer end to the inner end. The swirl channel is oppositely arranged to the shunt channel and has the same number. A transition channel is arranged between the outer ends of the swirl channel and the shunt channel.

[0007] On the basis of the above technical solution, on one side of the connection between the swirl channel and the swirl chamber, the tangent line of the swirl channel coincides with the tangent line of the swirl chamber, so that the connection between the swirl channel and the swirl chamber has a smooth transition.

[0008] On the basis of the above technical solution, the transition channel is arranged on the side wall between the first surface and the second surface of the swirl plate.

[0009] On the basis of the above technical solution, the transition flow channel is arranged between the first surface and the second surface of the swirl plate and penetrates through the swirl plate.

[0010] Optionally, the transition flow channel is a cylindrical channel.

[0011] On the basis of the above technical solution, the cross-sectional area of the transition flow channel is larger than that of the shunt channel.

[0012] On the basis of the above technical solution, the shunt holes are arranged opposite to the swirl chamber.

[0013] Optionally, the shunt holes are arranged at the center of the first surface.

[0014] Optionally, the swirl plate is cylindrical.

[0015] According to the second aspect of the present invention, a nozzle is provided, including the nozzle swirl plate according to any one of the above embodiments.

[0016] Compared with the related art, the beneficial effects of the present invention are as follows:

[0017] In the present invention, the inflowing fluid is shunted by arranging shunt holes and a shunt channel, so that the fluid obtains a certain radial velocity in the shunt channel, flows to the transition flow channel, and impacts to form a turbulent flow as the channel structure changes in the transition flow channel, and then flows to the swirl channel. The cross-sectional area of the swirl channel gradually decreases from the outer end to the inner end direction, forming a reduced-type channel. When the fluid flows from the swirl channel to the swirl chamber, part of the pressure potential energy is converted into kinetic potential energy, thereby increasing the swirl velocity. The rotational kinetic energy is used to make the fluid overcome its own viscosity and surface tension, and it is easier to atomize and break when flowing through the nozzle outlet, improving the atomization effect of the nozzle. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only one embodiment of the present invention. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0019] Figure 1 It is a schematic structural diagram of a nozzle swirl plate provided by the present invention;

[0020] Figure 2 It is a schematic structural diagram of another nozzle swirl plate provided by the present invention;

[0021] Figure 3 It is a schematic structural diagram of yet another nozzle swirl plate provided by the present invention;

[0022] Figure 4 is another structural schematic diagram of the nozzle swirl plate provided by the present utility model;

[0023] Figure 5 is yet another structural schematic diagram of the nozzle swirl plate provided by the present utility model;

[0024] Figure 6 is another structural schematic diagram of the nozzle swirl plate provided by the present utility model;

[0025] Figure 7 is yet another structural schematic diagram of the nozzle swirl plate provided by the present utility model;

[0026] Figure 8 is another structural schematic diagram of the nozzle swirl plate provided by the present utility model.

[0027] In the figure: 1. First surface; 11. Shunt hole; 12. Shunt channel; 2. Second surface; 21. Swirl chamber; 22. Swirl channel; 3. Transition flow channel. Specific embodiments

[0028] The following further illustrates the present utility model in conjunction with the accompanying drawings and examples:

[0029] The following details the embodiments of the present utility model. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0032] Embodiment 1

[0033] Combined Figure 1-5 As shown, an embodiment of the present disclosure provides a nozzle swirl plate, including a first surface 1 and a second surface 2 arranged opposite to each other. The first surface 1 is provided with a diversion hole 11 and a diversion channel 12. The inner end of the diversion channel 12 is connected to the diversion hole 11, and the outer end extends in the direction of the outer edge of the swirl plate. The number of the diversion channels 12 is multiple, and the multiple diversion channels 12 are circumferentially and uniformly distributed relative to the diversion hole 11. The second surface 2 is provided with a swirl chamber 21 and a swirl channel 22. The inner end of the swirl channel 22 is connected to the swirl chamber 21, and the outer end extends in the direction of the outer edge of the swirl plate. The cross-sectional area of the swirl channel 22 gradually decreases from the outer end to the inner end. The swirl channel 22 is arranged opposite to the diversion channel 12 and has the same number. A transition flow channel 3 is provided between the outer end of the swirl channel 22 and the outer end of the diversion channel 12.

[0034] By using the nozzle swirl plate provided by the embodiment of the present disclosure, the inflowing fluid is diverted by setting the diversion hole 11 and the diversion channel 12, so that the fluid obtains a certain radial velocity in the diversion channel 12, flows to the transition flow channel 3, and impacts to form turbulence as the channel structure changes in the transition flow channel 3, and then flows to the swirl channel 22. The cross-sectional area of the swirl channel 22 gradually decreases from the outer end to the inner end, forming a reduced-type channel. When the fluid flows from the swirl channel 22 to the swirl chamber 21, part of the pressure potential energy is converted into kinetic potential energy, thereby increasing the swirl velocity. The increased rotational kinetic energy enables the fluid to overcome its own viscosity and surface tension, and the increased rotational kinetic energy is further converted into the tangential velocity of the fluid at the nozzle outlet, and it is easier to break the liquid film after contacting with the air, thereby producing a better atomization effect.

[0035] Preferably, the number of the diversion channels 12 and the swirl channels 22 can be 3 - 5. In this application, the number of the diversion channels 12 and the swirl channels 22 is taken as 4 as an example.

[0036] Specifically, the swirl direction of the swirl channel 22 can be clockwise rotation or counterclockwise rotation, and this application does not limit the swirl direction of the swirl channel 22.

[0037] Based on the above technical solution, as Figure 2 and Figure 4 shown, on one side of the connection between the swirl channel 22 and the swirl chamber 21, the tangent of the swirl channel 22 coincides with the tangent of the swirl chamber 21, so as to make the connection between the swirl channel 22 and the swirl chamber 21 transition smoothly.

[0038] By making the swirl chamber 21 tangent to the spiral on one side of the swirl channel 22, the transition at the inlet of the swirl channel 22 and the swirl chamber 21 is smooth, and the two curves at the joint have a common tangent, which can reduce the impact wear of the fluid on the metal material, thereby improving the service life of the part.

[0039] Based on the above technical solution, the transition flow channel is arranged on the side wall between the first surface 1 and the second surface 2 of the swirl plate.

[0040] Embodiment 2

[0041] Combined with Figures 6-8 As shown, the present disclosure embodiment provides a nozzle swirl plate, including a first surface 1 and a second surface 2 arranged opposite to each other. The first surface 1 is provided with a flow splitting hole 11 and a flow splitting channel 12. The inner end of the flow splitting channel 12 is communicated with the flow splitting hole 11, and the outer end extends in the direction of the outer edge of the swirl plate. The number of the flow splitting channels 12 is multiple, and the multiple flow splitting channels 12 are circumferentially and uniformly distributed relative to the flow splitting hole 11. The second surface 2 is provided with a swirl chamber 21 and a swirl channel 22. The inner end of the swirl channel 22 is communicated with the swirl chamber 21, and the outer end extends in the direction of the outer edge of the swirl plate. The cross-sectional area of the swirl channel 22 gradually decreases from the outer end to the inner end. The swirl channel 22 is arranged opposite to the flow splitting channel 12 and has the same number. A transition flow channel 3 is arranged between the outer end of the swirl channel 22 and the outer end of the flow splitting channel 12.

[0042] Based on the above technical solution, as Figures 6-8 shown, the transition flow channel is arranged between the first surface 1 and the second surface 2 of the swirl plate and penetrates through the swirl plate.

[0043] Optionally, as Figures 6-8 shown, the transition flow channel is a cylindrical channel. After the fluid is split by the flow splitting hole 11 and flows into the four flow splitting channels 12, it flows into the swirl channel 22 on the second surface 2 through the cylindrical channel. The fluid obtains rotational kinetic energy in the swirl channel 22 and develops into a swirl in the swirl chamber 21. The fluid with circumferential tangential velocity is likely to form a larger atomization cone angle and finer atomization particle size at the outlet.

[0044] Based on the above technical solution, the cross-sectional area of the transition flow channel 3 is larger than the cross-sectional area of the flow splitting channel 12.

[0045] After the fluid is diverted by the guiding and splitting action of the flow splitting channel 12 and flows through the transition flow channel 3, due to the sharp change of the fluid channel, the fluid collides with the wall surface, which intensifies the formation of turbulence. When the cross-sectional area of the transition flow channel 3 is larger than the cross-sectional area of the flow splitting channel 12, the suddenly increased flow channel area also provides convenient conditions for the development and growth of turbulence.

[0046] Based on the above technical solution, the diversion hole 11 is disposed opposite to the swirl chamber 21.

[0047] Optionally, as Figure 6 shown, the diversion hole 11 is disposed at the center of the first surface 1.

[0048] Optionally, as Figures 6-8 shown, the swirl plate is cylindrical.

[0049] According to a second aspect of the present invention, there is provided a nozzle including the nozzle swirl plate according to any one of the above embodiments.

[0050] The nozzle provided by the embodiments of the present disclosure includes the swirl plate according to any one of the above disclosed embodiments, and thus has all the beneficial effects of the swirl plate according to any one of the above disclosed embodiments, which will not be elaborated herein.

[0051] The present invention has been described by way of example above, but the present invention is not limited to the above specific embodiments. Any modification or variation based on the present invention falls within the scope of protection of the present invention.

Claims

1. A nozzle swirl plate, characterized in that: It includes a first surface and a second surface that are arranged opposite to each other, the first surface is provided with a diverter hole and a diverter channel, the inner end of the diverter channel is connected to the diverter hole, and the outer end extends toward the outer edge of the swirl plate, the number of the diverter channels is multiple, and the multiple diverter channels are evenly distributed around the diverter hole, the second surface is provided with a swirl chamber and a swirl channel, the inner end of the swirl channel is connected to the swirl chamber, and the outer end extends toward the outer edge of the swirl plate, the cross-sectional area of ​​the swirl channel gradually decreases from the outer end to the inner end, the swirl channel and the diverter channel are arranged opposite to each other and have the same number, and a transition flow channel is provided between the outer end of the swirl channel and the outer end of the diverter channel.

2. The nozzle swirl plate according to claim 1, characterized in that: On one side of the connection between the swirl channel and the swirl chamber, the tangent line of the swirl channel coincides with the tangent line of the swirl chamber, so that the connection between the swirl channel and the swirl chamber has a smooth transition.

3. The nozzle swirl plate according to claim 1, characterized in that: The transition channel is arranged on the side wall between the first surface and the second surface of the swirl plate.

4. The nozzle swirl plate according to claim 1, characterized in that: The transition flow channel is arranged between the first surface and the second surface of the swirl plate and passes through the swirl plate.

5. The nozzle swirl plate according to claim 4, characterized in that: The transition flow channel is a cylindrical channel.

6. The nozzle swirl plate according to any one of claims 1 to 5, characterized in that: The cross-sectional area of ​​the transition flow channel is greater than the cross-sectional area of ​​the diversion channel.

7. The nozzle swirl plate according to any one of claims 1 to 5, characterized in that: The diversion hole is arranged opposite to the cyclone chamber.

8. The nozzle swirl plate according to any one of claims 1 to 5, characterized in that: The diverter hole is disposed at the center of the first surface.

9. The nozzle swirl plate according to any one of claims 1 to 5, characterized in that: The swirl plate is cylindrical.

10. A nozzle, characterized in that: The invention comprises the nozzle swirl plate according to any one of claims 1 to 9.

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