A centrifugal rotary homogenizer

Abstract

The application belongs to the technical field of cavitation generator, and particularly relates to a centrifugal rotating cavitation generator, which comprises a shell, a water inlet coaxially fixed and communicated with one side of the shell, and a water outlet fixed and communicated with the outer edge of the shell; a stator coaxially fixed on the side wall of the shell close to the water inlet, the stator being provided with a first cavitation assembly; a rotor rotationally connected to the side wall of the shell away from the water inlet, the rotor being provided with a second cavitation assembly, the second cavitation assembly being arranged opposite to the first cavitation assembly; and an impeller coaxially rotating in the shell, the impeller being located between the stator and the rotor, the water inlet end of the impeller facing the water inlet, the impeller being coaxially fixed with the rotor, the impeller shaft of the impeller being rotationally connected with the shell, and the impeller shaft penetrating out of the shell. The cavitation effect of the cavitation generator is improved by the arrangement of the first cavitation assembly and the second cavitation assembly.

Description

Technical Field

[0001] This invention belongs to the field of cavitation generator technology, and particularly relates to a centrifugal rotary cavitation generator. Background Technology

[0002] When the local pressure of a liquid is reduced below its saturated vapor pressure, gas nuclei containing insoluble gases or impurities will grow explosively. The series of processes from the initial formation, growth, contraction, and collapse of these gas nuclei is called "cavitation".

[0003] With the rapid development of industrial production, rapid population growth, and the expansion of agricultural production, a large amount of organic wastewater and sewage with excessive pesticide residues and difficult-to-degrade nature has been generated, causing water pollution and making daily water use increasingly scarce. Human development faces enormous challenges, and the living environment is becoming increasingly harsh. Wastewater with excessive heavy metals and sewage with severe pesticide residues continues to erode the living environment, with the affected area expanding and the duration becoming increasingly prolonged. Modern research has revealed that hydraulic cavitation is a novel, efficient, and convenient water treatment technology.

[0004] In the existing technology, the cavitation effect of cavitation generators used for hydraulic cavitation needs to be improved. Therefore, a centrifugal rotary cavitation generator is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a centrifugal rotary cavitation generator to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] A centrifugal rotary cavitation generator includes:

[0008] A housing, wherein a water inlet is coaxially fixed to and connected to one side of the housing, and a water outlet is fixed to and connected to the outer edge of the housing;

[0009] The stator is coaxially fixed to the side wall of the housing near the water inlet, and a first cavitation component is provided on the stator;

[0010] The rotor is rotatably connected to the side wall of the housing away from the water inlet. A second cavitation component is provided on the rotor, and the second cavitation component is positioned opposite to the first cavitation component.

[0011] An impeller rotates coaxially within the housing, located between the stator and the rotor. The inlet end of the impeller faces the inlet port. The impeller is coaxially fixed to the rotor, and the impeller shaft is rotatably connected to the housing, extending out of the housing.

[0012] The first cavitation component includes:

[0013] Multiple stator teeth are fixed to the outer edge of one side of the stator body. The multiple stator teeth are circumferentially spaced at equal intervals. The stator teeth are located on the side of the stator body closer to the rotor.

[0014] Stator slots are formed on the side of the stator teeth closest to the rotor;

[0015] The second cavitation component includes:

[0016] Multiple rotor teeth are fixed to the outer edge of one side of the rotor body and are arranged correspondingly to the stator teeth. The multiple rotor teeth are circumferentially spaced and the rotor teeth are located on the side of the rotor body close to the stator body.

[0017] The rotor slot structure is formed on the side of the rotor teeth near the stator teeth.

[0018] Preferably, a gap is left between the rotor teeth and the stator teeth, and the length of the gap is 1mm-5mm.

[0019] Preferably, the stator tooth slot is configured as a first trapezoid, the top edge of the stator tooth slot penetrates the side wall of the stator tooth near the rotor tooth, and the bottom edge of the stator tooth slot penetrates the side wall of the stator tooth near another stator tooth.

[0020] Preferably, the rotor slot structure includes: a first rotor tooth slot, the first rotor tooth slot being triangular, and the first rotor tooth slot penetrating one side wall of the rotor tooth near the other rotor tooth.

[0021] Preferably, the rotor slot structure includes: a second rotor tooth slot, the second rotor tooth slot being configured as a second trapezoid, the second trapezoid penetrating the two side walls of the rotor tooth that are disposed opposite to each other.

[0022] Compared with the prior art, the present invention has the following advantages and technical effects:

[0023] In this invention, a first cavitation component is provided on the stator, and a second cavitation component is provided on the rotor. The first and second cavitation components are arranged correspondingly. The rotor and impeller are driven to rotate by an external power device. The impeller sends the liquid that enters the housing through the inlet to the space between the first and second cavitation components. Cavitation occurs between the first and second cavitation components. The arrangement of the first and second cavitation components improves the cavitation effect of the cavitation generator. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is the front view of the present invention;

[0026] Figure 2 for Figure 1 AA section view in the middle;

[0027] Figure 3 This is a front view of the stator of the present invention;

[0028] Figure 4 This is a schematic diagram of the stator teeth of the present invention;

[0029] Figure 5 This is a front view of the rotor in Embodiment 1 of the present invention;

[0030] Figure 6 This is a front view of the rotor in Embodiment 2 of the present invention;

[0031] Figure 7 Maximum pressure curves for different rotor structures;

[0032] Figure 8 Maximum flow velocity curves for different rotor structures;

[0033] Figure 9 Maximum pressure curves for different rotor-stator spacing c;

[0034] Figure 10 Table of bubble volumes for hydraulic cavitation generators with different rotor-stator spacings (c);

[0035] Among them, 1. shell; 2. inlet; 3. outlet; 4. impeller shaft; 5. impeller; 6. stator; 7. rotor; 601. stator body; 602. stator teeth; 603. stator tooth slot; 701. rotor body; 702. rotor teeth; 703. first rotor tooth slot; 704. second rotor tooth slot. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Example 1

[0039] Reference Figures 1 to 5 This invention discloses a centrifugal rotating cavitation generator, comprising:

[0040] The shell 1 has an inlet 2 coaxially fixed and connected to one side of the shell 1, and an outlet 3 fixed and connected to the outer edge of the shell 1.

[0041] The stator 6 is coaxially fixed to the side wall of the housing 1 near the water inlet 2, and the stator 6 is provided with a first cavitation component;

[0042] Rotor 7 is rotatably connected to the side wall of housing 1 away from water inlet 2. A second cavitation component is provided on rotor 7, and the second cavitation component is positioned opposite to the first cavitation component.

[0043] Impeller 5 rotates coaxially inside housing 1. Impeller 5 is located between stator 6 and rotor 7. The water inlet end of impeller 5 faces water inlet 2. Impeller 5 and rotor 7 are coaxially fixed. Impeller shaft 4 of impeller 5 is rotatably connected to housing 1. Impeller shaft 4 extends out of housing 1.

[0044] In this invention, a first cavitation component is provided on the stator 6, and a second cavitation component is provided on the rotor 7. The first and second cavitation components are arranged correspondingly. The rotor 7 and impeller 5 are driven to rotate by an external power device. The impeller 5 sends the liquid that enters the housing 1 through the water inlet 2 to the space between the first and second cavitation components. Cavitation occurs between the first and second cavitation components. The arrangement of the first and second cavitation components improves the cavitation effect of the cavitation generator.

[0045] The first cavitation component includes:

[0046] Multiple stator teeth 602 are fixed to the outer edge of one side of the stator body 601. The multiple stator teeth 602 are circumferentially spaced and are located on the side of the stator body 601 close to the rotor 7.

[0047] Stator tooth slot 603 is formed on the side of stator tooth 602 near rotor 7;

[0048] The second cavitation component includes:

[0049] Multiple rotor teeth 702 are fixed to the outer edge of one side of the rotor body 701 and are arranged corresponding to the stator teeth 602. The multiple rotor teeth 702 are arranged at equal intervals in the circumference and the rotor teeth 702 are located on the side of the rotor body 701 close to the stator body 601.

[0050] The rotor slot structure is located on the side of the rotor tooth 702 near the stator tooth 602;

[0051] Further optimization of the design involves leaving a gap between rotor teeth 702 and stator teeth 602, with a gap length of 1mm-5mm.

[0052] The optimal clearance length between rotor teeth 702 and stator teeth 602 is 5mm.

[0053] In a further optimized design, the stator slot 603 is configured as a first trapezoid, with the top edge of the stator slot 603 penetrating the side wall of the stator tooth 602 near the rotor tooth 702, and the bottom edge of the stator slot 603 penetrating the side wall of the stator tooth 602 near another stator tooth 602.

[0054] Further optimization of the scheme, the rotor slot structure includes: a first rotor tooth slot 703, the first rotor tooth slot 703 is set as a triangle, and the through rotor tooth 702 of the first rotor tooth slot 703 is close to one side wall of another rotor tooth 702.

[0055] The rotation direction of rotor 7 is consistent with the opening direction of the first rotor tooth groove 703 of the triangle; the opening direction of the first rotor tooth groove 703 is consistent with the opening direction of the stator tooth groove 603.

[0056] Example 2

[0057] Reference Figure 6 The difference from Embodiment 1 is that the rotor slot structure includes: a second rotor tooth slot 704, which is configured as a second trapezoid, and the second trapezoid penetrates the two side walls of the rotor tooth 702 that are disposed opposite to each other.

[0058] Verification process:

[0059] Reference Figure 7 When the operating conditions are the same, the maximum flow velocity of the generator of the original rotor structure is 31.3 m / s, the maximum flow velocity of the generator of the second rotor tooth groove 704 is 33.6 m / s, and the maximum pressure of the generator of the first rotor tooth groove 703 is 28.7 m / s. It can be seen that the maximum flow velocity of the rotor 7 with the first rotor tooth groove 703 is smaller and the distribution is more uniform.

[0060] Reference Figure 8 The maximum pressure of the generator with a rotor 7 and stator 6 spacing c of 1 mm is 0.463 MPa, the maximum pressure with c of 3 mm is 0.373 MPa, and the maximum pressure with c of 5 mm is 0.372 MPa. Therefore, the hydraulic cavitation generator with a rotor 7 and stator 6 spacing c of 1 mm has the highest pressure, while the pressure values ​​are lower with c of 5 mm and 3 mm.

[0061] Reference Figure 9 The maximum flow velocity of the generator with a rotor 7 and stator 6 spacing c of 1 mm is 31.3 m / s, the maximum flow velocity with c of 3 mm is 32.07 m / s, and the maximum pressure with c of 5 mm is 32.02 m / s. This shows that although the spacing between rotor 7 and stator 6 varies, the velocity distribution is generally quite uniform.

[0062] Reference Figure 10 It can be intuitively observed that when c is 5mm, the generator of rotor 7 exhibits the widest cavitation distribution and the highest cavitation efficiency. By comparing three different centrifugal hydraulic cavitation generators with rotor 7 and stator 6 spacing c of 1mm, 3mm, and 5mm in terms of pressure, flow rate, and cavitation effect, it can be concluded that the centrifugal hydraulic cavitation generator with rotor 7 and stator 6 spacing c of 5mm has the best cavitation effect.

[0063] in conclusion:

[0064] (1) The maximum bubble volume fraction of the original structure cavitation generator is 98.69%; the maximum bubble volume fraction of the second rotor tooth groove 704 is 99.06%, and the bubbles are mainly concentrated in front of the rotor tooth 702 of the rotor 7 and the front end of the second rotor tooth groove 704 near the impeller 5; the maximum bubble volume fraction of the hydraulic cavitation generator of the first rotor tooth groove 703 is 99.10%, and the bubbles are mainly concentrated in front of the rotor tooth 702 of the rotor 7 and on the triangular groove.

[0065] (2) When the distance c between the rotor 7 and the stator 6 is 1 mm, the maximum bubble volume fraction of the cavitation generator is about 98.69%; when the distance c is 3 mm, the maximum bubble volume fraction is 99.31%, and the distribution of bubble content is not uniform, mainly concentrated between some rotor teeth 702 of the rotor 7; when c is 5 mm, the maximum bubble volume fraction is 99.37%, and the bubble content is distributed on the rotor body 701 and rotor teeth 702 of the rotor 7, with a wide distribution range and a large number.

[0066] (3) In cavitation generators with different rotor structures, the cavitation effect is better when the contact area of ​​rotor 7 increases. This is because when the contact area between rotor 7 and the fluid domain increases, there are more locations where cavitation is easily generated, thus resulting in a better cavitation effect.

[0067] (4) The cavitation distribution becomes more uniform as the distance c between rotor 7 and stator 6 increases, and the degree of cavitation gradually increases with the increase of the distance c between rotor 7 and stator 6. The cavitation efficiency is optimal when the distance c between rotor 7 and stator 6 is 5 mm. This is because when the distance c between rotor 7 and stator 6 gradually increases, the rate of change of speed between the stator and rotor decreases, making it easier to form cavitation, resulting in a better cavitation effect.

[0068] In summary, under the condition that other external conditions remain unchanged, with the working pressure at standard atmospheric pressure and the rotor speed at 2890 r / min, the centrifugal hydraulic cavitation device with a distance c between rotor 7 and stator 6 of 5 mm and the first rotor tooth groove 703 has the best cavitation effect.

[0069] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0070] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A centrifugal rotary cavitation generator, characterized in that, include: A housing (1) has an inlet (2) coaxially fixed to one side and connected to the housing (1), and an outlet (3) fixed to the outer edge of the housing (1). The stator (6) is coaxially fixed to the side wall of the housing (1) near the water inlet (2), and a first cavitation component is provided on the stator (6); The rotor (7) is rotatably connected to the side wall of the housing (1) away from the water inlet (2). A second cavitation component is provided on the rotor (7), and the second cavitation component is positioned opposite to the first cavitation component. Impeller (5) rotates coaxially inside housing (1). Impeller (5) is located between stator (6) and rotor (7). The water inlet end of impeller (5) faces water inlet (2). Impeller (5) is coaxially fixed to rotor (7). Impeller shaft (4) of impeller (5) is rotatably connected to housing (1). Impeller shaft (4) extends out of housing (1). The first cavitation component includes a plurality of stator teeth (602) fixed to the outer edge of one side of the stator body (601). The plurality of stator teeth (602) are circumferentially spaced and the stator teeth (602) are located on the side of the stator body (601) close to the rotor (7). Stator tooth groove (603) is formed on the side of the stator tooth (602) near the rotor (7); The second cavitation component includes a plurality of rotor teeth (702), which are fixed to the outer edge of one side of the rotor body (701) and are correspondingly arranged with respect to the stator teeth (602). The plurality of rotor teeth (702) are circumferentially spaced, and the rotor teeth (702) are located on the side of the rotor body (701) close to the stator body (601). The rotor slot structure is formed on the side of the rotor teeth (702) near the stator teeth (602); A gap is left between the rotor teeth (702) and the stator teeth (602), and the length of the gap is 1mm-5mm; The rotor slot structure includes: a first rotor slot (703), the first rotor slot (703) is triangular, and the first rotor slot (703) penetrates one side wall of the rotor tooth (702) near the other rotor tooth (702); The rotation direction of the rotor (7) is consistent with the opening direction of the first rotor tooth groove (703), and the opening direction of the first rotor tooth groove (703) is consistent with the opening direction of the stator tooth groove (603).

2. The centrifugal rotary cavitation generator according to claim 1, characterized in that, The stator tooth groove (603) is configured as a first trapezoid, the top edge of the stator tooth groove (603) penetrates the side wall of the stator tooth (602) near the rotor tooth (702), and the bottom edge of the stator tooth groove (603) penetrates the side wall of the stator tooth (602) near another stator tooth (602).

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