CN114904672B - Bionic adjustable annular water jet nozzle - Google Patents
Bionic adjustable annular water jet nozzle Download PDFInfo
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- CN114904672B CN114904672B CN202210494090.9A CN202210494090A CN114904672B CN 114904672 B CN114904672 B CN 114904672B CN 202210494090 A CN202210494090 A CN 202210494090A CN 114904672 B CN114904672 B CN 114904672B
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- main body
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- water inlet
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- blocking needle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
- B05B1/08—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape of pulsating nature, e.g. delivering liquid in successive separate quantities ; Fluidic oscillators
- B05B1/083—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape of pulsating nature, e.g. delivering liquid in successive separate quantities ; Fluidic oscillators the pulsating mechanism comprising movable parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
- B05B1/06—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in annular, tubular or hollow conical form
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
- B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
- B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
- B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
- B05B1/3415—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with swirl imparting inserts upstream of the swirl chamber
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
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Abstract
The invention relates to a bionic adjustable annular water jet nozzle which comprises a nozzle main body, wherein a water inlet is positioned on the axial central line of the nozzle main body, a channel is formed in the position, close to the water inlet, of the nozzle main body, the top of a blocking needle is connected into the channel, and the top of the blocking needle can move relative to the channel; the top of the blocking needle is provided with a water inlet, the inner cavity of the nozzle main body is of a multi-cavity bionic structure, and when water enters the inner cavity of the nozzle main body from the water inlet, the water is sprayed to the wall of the inner cavity of the nozzle main body through the water inlet; along with the change of the position of the top of the blocking needle relative to the channel, the distance between the tail of the blocking needle and the wall of the cavity at the water outlet of the nozzle main body is changed, and when the top of the blocking needle is positioned at the end part of the channel close to the water inlet, the tail of the blocking needle seals the water outlet of the nozzle main body; the invention expands the application range of the self-oscillation nozzle, has simple structure, convenient operation, easy disassembly and maintenance and practicability, and increases the working area by the annular jet flow, thereby improving the working efficiency.
Description
Technical Field
The invention relates to a bionic adjustable annular water jet nozzle, and belongs to the technical field of fluid elements.
Background
The high-pressure water jet is a high-speed water flow with concentrated energy which is sprayed out by a nozzle with a certain shape after water is used as a medium and huge energy is obtained by pressurization of high-pressure generating equipment. According to the loading characteristic of jet flow to materials, the water jet flow can be divided into four types, namely continuous jet flow, pulse jet flow, cavitation jet flow and abrasive jet flow.
Self-oscillating jet is a new type of high-efficiency pulse jet which has been developed in recent years. The self-oscillation nozzle is a nozzle structure which amplifies jet disturbance energy, accelerates processes such as jet instability, cavitation and the like and further generates oscillation jet. The excitation principle comprises the theories of fluid stability, fluid resonance, water acoustics and the like. The initial feedback amplification of the jet flow is realized through the self structure, so that continuous action energy is converted into intermittent action energy, the fluid energy is focused in the process and then is released discontinuously, and the pulse jet flow with instantaneous energy several times higher than that of the continuous jet flow is formed, so that the cavitation and the beating effect of the jet flow are enhanced. The jet has the characteristics of pulse jet and cavitation jet, so that the jet becomes a leading-edge subject of research of many scholars at home and abroad in recent years.
The self-oscillation nozzle device is a core component for generating self-oscillation jet flow, and the structural parameters, particularly the size in a cavity, directly determine the oscillation pulsation effect of the jet flow. The self-oscillation effect is generated not only in relation to the structural size of the oscillation cavity, but also in relation to the operating parameters of the water jet. At home and abroad, students mostly use methods such as experiments, numerical simulation and the like to explore the cavitation generation mechanism and the influence of the nozzle structure on the cavitation effect and optimize the nozzle structure parameters, but in the actual application process, a general self-oscillation nozzle can only be suitable for a certain specific working condition, and is not beneficial to popularization and application of the nozzle.
Because of these problems, the performance and efficiency of the self-oscillating nozzle have a room for improvement on the one hand, and the self-oscillating nozzle has not been highly adaptable on the other hand. Therefore, a self-oscillation pulse jet nozzle which can adapt to various working conditions and has high efficiency needs to be designed.
Disclosure of Invention
The invention provides a bionic adjustable annular water jet nozzle, which solves the problems of low nozzle efficiency and incapability of adjusting the size of a water outlet.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a bionic adjustable annular water jet nozzle comprises a nozzle main body, wherein a water inlet is positioned on the axial central line of the nozzle main body, a channel is formed in the position, close to the water inlet, of the nozzle main body, the top of a blocking needle is connected into the channel, and the top of the blocking needle can move relative to the channel;
the top of the blocking needle is provided with a water inlet, the inner cavity of the nozzle main body is of a multi-cavity bionic structure, and when water enters the inner cavity of the nozzle main body from the water inlet, the water is sprayed to the wall of the inner cavity of the nozzle main body from the water inlet;
along with the change of the position of the top of the blocking needle relative to the channel, the distance between the tail of the blocking needle and the wall of the cavity at the water outlet of the nozzle main body is changed, and when the top of the blocking needle is positioned at the end part of the channel close to the water inlet, the tail of the blocking needle seals the water outlet of the nozzle main body;
as a further preferred aspect of the invention, the multi-cavity bionic structure of the nozzle main body is a symmetrical structure relative to the axial center line, the interior of the nozzle main body is a hollow structure, and the part of the cavity wall of the nozzle main body, which is close to the water inlet, is in a wave shape;
as a further preferred aspect of the present invention, the wavy shape presented by the cavity wall of the nozzle body comprises a plurality of combinations of wave troughs and wave crests which are smoothly connected in sequence, and the cavity diameter of the nozzle body gradually decreases from the water inlet to the water outlet;
as a further preferred aspect of the present invention, the cavity wall of the nozzle body comprises two successive smoothly connected combinations of wave troughs and wave crests;
as a further preferred aspect of the present invention, the inner cavity curve of the nozzle body has a radius of curvature of 1;
in the combination of two smoothly connected wave troughs and wave crests in the nozzle body, the combination of the wave trough and the wave crest close to the water outlet of the nozzle body is defined as an upper chamber, the combination of the wave trough and the wave crest close to the water inlet is defined as a lower chamber, and the cavity diameter ratio of the two wave crests is D 1 /D 3 =0.6-3.6, the cavity diameter at two wave troughs is D 2 /D 4 =0.5-2.5；
The diameter of the vertical part of the blocking needle is 15-25% of the cavity diameter at the crest of the lower chamber;
the ratio of the length of the upper cavity chamber parallel to the central line to the length of the lower cavity chamber parallel to the central line is L 1 /L 2 =0.3-3.3；
As a further preference of the invention, the part of the inner cavity of the nozzle main body, which is close to the water outlet, is a cylindrical inner wall, and the cavity wall at the water inlet is expanded outwards;
as a further optimization of the invention, after the cavity wall at the water inlet is expanded outwards, the inclined cavity wall is parallel to the tail part of the blocking needle;
as a further preference of the invention, the whole plugging needle is in a T shape, the transverse part of the plugging needle is the top of the plugging needle, a water inlet hole formed in the top of the plugging needle is in a Y-shaped hole structure, and two flow channel branches of the water inlet hole are positioned in the vertical part of the plugging needle and are symmetrical relative to the central axis of the nozzle main body;
as a further optimization of the invention, water enters from the water inlet, is sprayed to the inner cavity wall of the nozzle main body through two flow channels of the Y-shaped porous structure, the inside of the nozzle main body is divided into two oscillating cavities which are symmetrical relative to the blocking needle, and annular jet flow is formed at the water outlet;
as a further preferred aspect of the present invention: set up the internal thread on the cell wall of channel, the top outer wall of stifled needle sets up the external screw thread, and the internal thread matches with the external screw thread.
Through the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. the bionic adjustable annular water jet nozzle provided by the invention has the advantages that the area of the water outlet is adjustable, the application condition of the self-oscillation nozzle is expanded, and a foundation is laid for the optimization and serialization of the self-oscillation nozzle;
2. the bionic adjustable annular water jet nozzle provided by the invention introduces the oscillation amplification structural characteristics of the organisms in the nature into the internal structure of the nozzle, and designs a bionic nozzle structure on the basis of a tail multi-chamber structure, so that the bionic adjustable annular water jet nozzle has a better self-oscillation effect;
3. the bionic adjustable annular water jet nozzle provided by the invention has the advantages that the jet generation efficiency and the working capacity are improved by adjusting the shape (angle) and the area of the outlet;
4. the bionic adjustable annular water jet nozzle provided by the invention is easy to disassemble, assemble and maintain, high in working efficiency, better in practicability and good in market prospect.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic model diagram of a preferred embodiment of the present invention in an initial state;
FIG. 2 is a schematic model diagram of a preferred embodiment of the present invention under a certain condition;
FIG. 3 is a schematic model diagram of a preferred embodiment of the present invention under a certain condition;
FIG. 4 is a schematic model diagram of a preferred embodiment of the present invention under a certain condition;
FIG. 5 is a schematic model diagram of the preferred embodiment of the present invention in a closed state;
FIG. 6 is a schematic diagram of the model dimensions of the preferred embodiment of the present invention under a certain condition;
FIG. 7 is a schematic view of the water inlet flow direction under a certain working condition according to the preferred embodiment of the present invention;
FIG. 8 is a schematic view of the water inlet flow direction under a certain working condition according to the preferred embodiment of the present invention;
FIG. 9 is a schematic model diagram of the preferred embodiment of the present invention under a certain condition with different water outlet angles;
fig. 10 is a model schematic diagram of the preferred embodiment of the present invention under a certain condition with different water outlet angles.
In the figure: 1 is a blocking needle, 1-1 is a water inlet, 1-2 is a flow passage, 1-3 is an external thread, 2 is a nozzle main body, 2-1 is a water inlet, 2-2 is a left oscillation cavity, 2-3 is a water outlet, 2-4 is a right oscillation cavity, and 2-5 is an internal thread.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. In the description of the present application, it is to be understood that the terms "left side", "right side", "upper part", "lower part", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and that "first", "second", etc., do not represent an important degree of the component parts, and thus are not to be construed as limiting the present invention. The specific dimensions used in the present example are only for illustrating the technical solution and do not limit the protection scope of the present invention.
As explained in the background art, the self-oscillating nozzle can only be applied to a specific working condition, and the self-oscillating effect is usually determined by the water flow pressure provided by the water jet generating device, so that the self-oscillating effect is to be further improved. Therefore, the application provides a bionic adjustable annular water jet nozzle which comprises a nozzle main body 2, wherein an adjustable blocking needle 1 is further arranged in the nozzle main body as shown in figure 1, and the blocking needle mainly has the function of adjusting the area of a water outlet 2-3 of the nozzle main body so as to adapt to multiple working conditions.
Specifically, the water inlet 2-1 is positioned on the axial central line of the nozzle main body, a channel is formed in the position, close to the water inlet, of the nozzle main body, the top of the blocking needle is connected into the channel, and the top of the blocking needle can move relative to the channel; the top of the blocking needle is provided with a water inlet hole 1-1, and when water enters the inner cavity of the nozzle main body from the water inlet, the water is sprayed to the wall of the inner cavity of the nozzle main body from the water inlet hole; with the change of the position of the top of the blocking needle relative to the channel, the distance between the tail of the blocking needle and the cavity wall at the water outlet of the nozzle body is changed, fig. 2-4 show several working conditions when the position of the tail of the blocking needle relative to the water outlet is changed, and when the top of the blocking needle is positioned at the end part of the channel close to the water inlet, the tail of the blocking needle seals the water outlet of the nozzle body, as shown in fig. 5. That is to say, the water flow needs to be sprayed out from the water outlet, so the area of the water outlet can be adjusted by changing the position relation of the tail part of the blocking needle relative to the water outlet.
In the application, a more outstanding innovation point is that a bionic structure of the tail part of the rattlesnake is introduced, and the optimal self-oscillation effect is formed in the nozzle main body so as to improve the generation efficiency of the pulse jet. As shown in figure 1, the nozzle main body is of a symmetrical structure relative to an axial center line, the interior of the nozzle main body is of a hollow structure, and the part of the cavity wall of the nozzle main body, which is close to the water inlet, is of a wave shape. The wave that the chamber wall of nozzle main part appears includes a plurality of troughs and crest combination of smooth connection in order, and the chamber diameter of nozzle main part diminishes gradually from the water inlet to delivery port direction.
In a preferred embodiment, the wall of the nozzle body includes two successive smoothly connected combinations of valleys and peaks. Because the inner wall of the nozzle main body is designed into a bionic streamline structure, in order to obtain a better self-oscillation effect, the curvature radius range of the inner cavity curve of the nozzle main body is limited to about 1. At the same time, the cavity diameter ratio of each part in the nozzle body is limited, as shown in fig. 6, in the combination of two smoothly connected wave troughs and wave crests in the nozzle body, the cavity diameter ratio of the two wave crests is D 1 /D 3 =0.6-3.6, the cavity diameter at two wave troughs is D 2 /D 4 0.5-2.5; the wave trough and the wave crest near the water outlet of the nozzle body are defined to be combined into an upper chamber, the wave trough and the wave crest near the water inlet are defined to be combined into a lower chamber, the diameter of the vertical part of the plugging needle is 15-25% of the cavity diameter of the wave crest of the lower chamber, and good self-oscillation pulse jet flow can be generated; meanwhile, the ratio of the cavity length of the upper cavity chamber parallel to the central line to the cavity length of the lower cavity chamber parallel to the central line is L 1 /L 2 When the jet nozzle is used for cleaning water at the water outlet, the jet nozzle can promote the generation of pulse cavitation jet, the gas content of the nozzle body in the direction of the central line is high, the speed of water flow at the water outlet is uniform, and the flow speed is high, so that a good jet cleaning effect can be generated.
In order to form the best self-oscillation effect in the inner cavity of the nozzle main body, the arrangement of a water inlet hole structure of the blocking needle is matched, the blocking needle is integrally T-shaped, the transverse part of the blocking needle is the top of the blocking needle, the water inlet hole formed in the top of the blocking needle is of a Y-shaped hole structure, and two flow channel 1-2 branches of the water inlet hole are located in the vertical part of the blocking needle and are symmetrical relative to the central axis of the nozzle main body. High-pressure water provided by the water jet generating device is connected to a water inlet of the nozzle main body through a high-pressure hose, as shown in fig. 7-8, a blocking needle is adjusted, water enters from the water inlet, unstable weak disturbance waves of high-speed flow velocity in the water inlet process, namely vortex disturbance, are sprayed to the inner cavity wall of the nozzle main body through two flow channels of the Y-shaped hole structure, wherein the water flow directions at the two flow channels in the Y-shaped hole structure are different, the water flow collides with the inner wall of different nozzle main bodies, the nozzle main body is divided into two oscillating cavities (defined as a left oscillating cavity 2-2 and a right oscillating cavity 2-4) which are symmetrical relative to the blocking needle, the water flow gradually forms large-scale vortex ring structures under the resonance action of the oscillating cavities, the vortex ring structures collide with the wavy cavity wall to generate different pulse jet flows, the pulse jet flows are sprayed out from water outlets of the left oscillating cavity and the right oscillating cavity, and annular jet flows are formed at a water outlet.
Meanwhile, as shown in fig. 9 to 10, the nozzle body changes the annular area of the jet flow outlet by changing the screwing depth of the blocking needle into the nozzle body, and adjusts the outflow state of the jet flow by increasing the working area, thereby improving the working efficiency of the nozzle body.
In the preferred embodiment provided by the application, the part of the inner cavity of the nozzle body, which is close to the water outlet, is a cylindrical inner wall, and the cavity wall at the water inlet is expanded outwards. After the cavity wall at the water inlet is expanded outwards, the inclined cavity wall is parallel to the tail part of the blocking needle. The inclined cavity wall and the blocking needle tail part can not be parallel; the auxiliary device can change the angle of the included angle between the blocking needle and the nozzle body, so as to realize the change of the angle and the size of the water flow.
The top of the blocking needle is connected with the channel through a thread, specifically, an internal thread 2-5 is arranged on the wall of the channel, an external thread 1-3 is arranged on the outer wall of the top of the blocking needle, and the internal thread is matched with the external thread.
In summary, the bionic adjustable annular water jet nozzle provided by the application has the advantages that the blocking needle is screwed in through the channel at the water inlet of the nozzle main body, the change of the area of the water outlet is realized by changing the depth of the screwed nozzle main body, the biological structure optimization nozzle structure with the self-excitation amplification principle is combined with the nature, the application working condition is expanded, and the generation efficiency and the regulation and control precision of pulse jet are improved.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The meaning of "and/or" as used herein is intended to include both the individual components or both.
The term "connected" as used herein may mean either a direct connection between components or an indirect connection between components via other components.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. The utility model provides a ring water jet nozzle with adjustable it is bionical, includes nozzle main body (2), its characterized in that: the water inlet (2-1) is positioned on the axial central line of the nozzle main body (2), a channel is formed in the position, close to the water inlet (2-1), of the nozzle main body (2), the top of the blocking needle (1) is connected into the channel, and the top of the blocking needle (1) can move relative to the channel;
the top of the blocking needle (1) is provided with a water inlet hole (1-1), the inner cavity of the nozzle main body (2) is of a multi-cavity bionic structure, and when water enters the inner cavity of the nozzle main body (2) from the water inlet hole (2-1), the water is sprayed to the inner cavity wall of the nozzle main body (2) from the water inlet hole (1-1);
along with the change of the position of the top of the blocking needle (1) relative to the channel, the distance between the tail of the blocking needle (1) and the cavity wall at the water outlet (2-3) of the nozzle main body (2) is changed, and when the top of the blocking needle (1) is positioned at the end part of the channel close to the water inlet (2-1), the tail of the blocking needle (1) seals the water outlet (2-3) of the nozzle main body (2);
the multi-cavity bionic structure of the nozzle main body (2) is a symmetrical structure relative to an axial center line, the interior of the multi-cavity bionic structure is a hollow structure, and the part of the cavity wall of the multi-cavity bionic structure, which is close to the water inlet (2-1), is in a wave shape;
the wave shape presented by the cavity wall of the nozzle main body (2) comprises a plurality of wave troughs and wave crests which are connected smoothly in sequence, and the cavity diameter of the nozzle main body (2) is gradually reduced from the water inlet (2-1) to the water outlet (2-3);
the cavity wall of the nozzle main body (2) comprises two wave trough and wave crest combinations which are sequentially and smoothly connected.
2. The biomimetic adjustable annular water jet nozzle according to claim 1, wherein: the curvature radius of an inner cavity curve of the nozzle main body (2) is 1;
in the combination of two smoothly connected wave troughs and wave crests in the nozzle main body (2), the combination of the wave trough and the wave crest close to the water outlet (2-3) of the nozzle main body (2) is defined as an upper chamber, the combination of the wave trough and the wave crest close to the water inlet (2-1) is defined as a lower chamber, and the cavity diameter ratio of the two wave crests is D 1 /D 3 =0.6-3.6, the cavity diameter at two wave troughs is D 2 /D 4 =0.5-2.5；
The diameter of the vertical part of the blocking needle (1) is 15-25% of the cavity diameter of the wave crest of the lower cavity;
the ratio of the length of the upper cavity chamber parallel to the central line to the length of the lower cavity chamber parallel to the central line is L 1 /L 2 =0.3-3.3。
3. The biomimetic adjustable annular water jet nozzle according to claim 1, wherein: the part of the inner cavity of the nozzle main body (2) close to the water outlet (2-3) is a cylindrical inner wall, and the cavity wall at the water inlet (2-1) is expanded outwards.
4. The biomimetic adjustable annular water jet nozzle according to claim 3, wherein: after the cavity wall at the water inlet (2-1) expands outwards, the inclined cavity wall is parallel to the tail part of the blocking needle (1).
5. The biomimetic adjustable annular water jet nozzle according to claim 1, wherein: the whole blocking needle (1) is in a T shape, the transverse part of the blocking needle is the top of the blocking needle (1), a water inlet hole (1-1) formed in the top of the blocking needle (1) is of a Y-shaped hole structure, and two flow channels (1-2) of the water inlet hole (1-1) are located in the vertical part of the blocking needle (1) in a branching mode and are symmetrical relative to the central axis of the nozzle main body.
6. The biomimetic adjustable annular water jet nozzle according to claim 5, wherein: water enters from the water inlet (2-1), is sprayed to the inner cavity wall of the nozzle main body (2) through the two runners (1-2) of the Y-shaped hole-shaped structure, the interior of the nozzle main body (2) is divided into two oscillating cavities which are symmetrical relative to the blocking needle (1), and annular jet flow is formed at the water outlet (2-3).
7. The biomimetic adjustable annular water jet nozzle according to claim 1, wherein: an internal thread (2-5) is arranged on the groove wall of the groove channel, an external thread (1-3) is arranged on the outer wall of the top of the blocking needle (1), and the internal thread (2-5) is matched with the external thread (1-3).
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| CN202210494090.9A CN114904672B (en) | 2022-05-05 | 2022-05-05 | Bionic adjustable annular water jet nozzle |
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| CN202210494090.9A CN114904672B (en) | 2022-05-05 | 2022-05-05 | Bionic adjustable annular water jet nozzle |
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| CN114904672A CN114904672A (en) | 2022-08-16 |
| CN114904672B true CN114904672B (en) | 2023-02-03 |
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| EP3334536B1 (en) * | 2015-08-14 | 2019-10-09 | Leafgreen Limited | Pulsed spray nozzle arrangements |
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