Bubble generator
By combining a venturi tube and a rotating blade, the problems of uneven particle size and high energy consumption in traditional micro-nano bubble generation technology are solved, achieving the effects of uniform bubble size and reduced energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU S C EXACT EQUIP
- Filing Date
- 2025-05-14
- Publication Date
- 2026-04-28
AI Technical Summary
Traditional micro/nano bubble generation technologies suffer from problems such as uneven particle size and increased energy consumption due to pressurized gas release or rotary shearing methods.
By employing a combination of Venturi tubes, bubble refinement components, and bubble micronization components, gas is adsorbed under negative pressure to form a gas-liquid two-phase fluid. The bubbles are then sheared by rotating blades at different directions and speeds, thus refining the bubbles and avoiding pressurized air delivery, thereby reducing energy consumption.
This method achieves uniform bubble size and reduced energy consumption. By driving a rotating blade through water flow to shear the bubbles, energy consumption is reduced and the bubble refinement effect is improved.
Smart Images
Figure CN224167285U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of industrial cleaning technology, and in particular relates to a bubble generator. Background Technology
[0002] Micro- and nano-bubbles, with their high specific surface area, long water residence time, and interfacial free radical effect, have shown potential market value in fields such as environmental remediation, medical cleaning, agricultural irrigation, industrial cleaning, and home health.
[0003] However, traditional micro- and nano bubble generation technologies have the following core drawbacks: traditional venturi tubes generate non-uniform particle sizes, and using methods such as pressurized gas release or rotary shearing to improve bubble uniformity increases energy consumption.
[0004] Therefore, how to solve the above-mentioned defects is a technical problem that urgently needs to be tackled in this field.
[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore, the above description is not considered to constitute information related to the technology. Utility Model Content
[0006] This disclosure provides at least one bubble generator.
[0007] In a first aspect, embodiments of this disclosure provide a bubble generator, comprising:
[0008] The Venturi tube has a trachea on its side wall that communicates with the throat of the Venturi tube.
[0009] The shell, one end of which is fitted onto the outer wall of the outlet end of the venturi tube;
[0010] A bubble refining component, which is rotatably mounted inside a housing, is used to rotate and shear bubbles;
[0011] The bubble microforming component is rotated within the housing near the outlet, and its rotation direction is opposite to that of the bubble refining component.
[0012] As the liquid flows toward the shell through the Venturi tube, the gas is drawn into the Venturi tube through the trachea.
[0013] The gas-liquid two-phase fluid drives the bubble refining component to rotate, and the bubble refining component rotates in the forward direction and shears the bubbles;
[0014] The gas-liquid two-phase fluid drives the bubble micronization component to rotate. The bubble micronization component rotates in the opposite direction and at a different speed relative to the bubble refinement component to further refine the bubbles.
[0015] In one alternative embodiment, the venturi tube comprises:
[0016] A hyperbolic constricting tube with a trachea at its throat;
[0017] A stepped diffuser tube is installed at the outlet end of a hyperbolic converging tube;
[0018] The nozzles are evenly distributed on the outer wall of the venturi tube outlet end and face the bubble refining component.
[0019] In this process, the fluid velocity gradually increases as it passes through the hyperbola converging tube, and the gas is drawn into the Venturi tube by negative pressure through the gas tube to form bubbles.
[0020] When a gas-liquid two-phase fluid passes through a stepped diffuser, the stepped diffuser is used to prevent the generated bubbles from recombinizing.
[0021] In one alternative implementation, the bubble refining component includes:
[0022] The first vortex disk is fitted onto the outer wall of the main shaft and has several first drainage holes.
[0023] Two first rotating cutting blades are mounted on the outer wall of the main shaft and rotate in the forward direction;
[0024] In this process, after the gas-liquid two-phase fluid passes through the first guide hole, the first guide hole guides the gas-liquid two-phase fluid to form a vortex, thereby increasing its flow velocity;
[0025] The two first rotating blades rotate along the vortex direction to shear the bubbles.
[0026] In one alternative implementation, the bubble micronization component includes:
[0027] The second vortex disk is fitted onto the outer wall of the main shaft and has several second drainage holes, the inclination angles of the second drainage holes being opposite to those of the first drainage holes;
[0028] Two second rotating cutting blades are rotatably mounted on the outer wall of the main shaft and rotate in the opposite direction to the first rotating cutting blade.
[0029] In this process, after the gas-liquid two-phase fluid passes through the second guide hole, the second guide hole guides the gas-liquid two-phase fluid to rotate in the opposite direction and form a vortex;
[0030] The two second rotating blades rotate along the vortex direction to further shear the bubbles.
[0031] In one alternative embodiment, the rotational speed ratio of the second rotating blade to the first rotating blade is 1:(0.4-0.7).
[0032] In one optional embodiment, the first rotating cutting blade is provided with a plurality of fine holes, which are used to cut the air bubble when the first rotating cutting blade rotates in the forward direction.
[0033] In one optional embodiment, the second rotating blade is provided with a plurality of micropores, which are used to further spin-cut and refine the bubbles when the second rotating blade rotates in the opposite direction.
[0034] In one optional embodiment, the ratio of the pore diameter of the micropore to the pore diameter of the fine pore is 1:2;
[0035] When the gas-liquid two-phase fluid flows from the first rotating blade to the second rotating blade, the fine holes are used to further spin-cut and refine the bubbles.
[0036] In one optional embodiment, a friction guide plate is provided on the inner wall of the housing near the outlet, and the outer wall of the friction guide plate is provided with a plurality of stepped platforms along the axial direction for elongating and refining bubbles.
[0037] In one optional embodiment, a spacer is fitted on the outer wall of the venturi tube, and the outer wall of the spacer abuts against the inner wall of the housing.
[0038] One end of the spindle is inserted into the venturi tube, and a waterproof plug is fitted onto the outer wall.
[0039] The beneficial effects of this invention are as follows: This invention provides a bubble generator. Through the cooperation of a Venturi tube, a bubble refining component, and a bubble micronization component, when the liquid flows from the Venturi tube towards the shell, the gas is adsorbed into the Venturi tube by negative pressure and forms a gas-liquid two-phase fluid. This avoids pressurizing and supplying air into the Venturi tube, thus reducing energy consumption. The gas-liquid two-phase fluid flows sequentially through the bubble refining component and the bubble micronization component, and sequentially drives the first and second rotating cutting blades to rotate. The first and second rotating cutting blades rotate in opposite directions and at different speeds to achieve rotary cutting and refining of bubbles. At the same time, the rotation of the first and second rotating cutting blades does not require a motor, but is driven only by the flow of water, further reducing energy consumption.
[0040] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.
[0041] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description
[0042] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0043] Figure 1 A perspective view of a bubble generator provided in an embodiment of this disclosure;
[0044] Figure 2 An unfolded perspective view of a bubble generator provided in an embodiment of this disclosure;
[0045] Figure 3 A front view of a bubble generator provided in an embodiment of this disclosure;
[0046] Figure 4 Provided for the embodiments of this disclosure Figure 3 Cross-sectional view of DD.
[0047] In the picture:
[0048] 1. Venturi tube; 10. Traction tube; 11. Hypercurvature converging tube; 12. Stepped diffuser; 13. Nozzle;
[0049] 2. Housing; 20. Friction drainage plate; 21. Spacer; 22. Waterproof plug;
[0050] 3. Bubble refining component; 30. Main shaft; 31. First vortex disk; 32. First rotating cutting blade; 33. First drainage hole; 34. Fine hole; 35. First stepped bushing;
[0051] 4. Bubble microforming component; 41. Second vortex disk; 42. Second rotating blade; 43. Second drainage hole; 44. Micropore; 45. Second stepped bushing. Detailed Implementation
[0052] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0053] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.
[0054] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.
[0055] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.
[0056] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.
[0057] Research has revealed that micro- and nano-bubbles, due to their high specific surface area, long water retention time, and interfacial free radical effect, exhibit potential market value in fields such as environmental remediation, medical cleaning, agricultural irrigation, industrial cleaning, and home health.
[0058] However, traditional micro- and nano bubble generation technologies have the following core drawbacks: traditional venturi tubes generate non-uniform particle sizes, and using methods such as pressurized gas release or rotary shearing to achieve uniform bubbles increases energy consumption.
[0059] Therefore, how to avoid the above-mentioned defects is a technical problem that urgently needs to be solved in this field.
[0060] The defects in the above solutions and the reasons for their occurrence are the results of the inventors' practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventors' contributions to this disclosure.
[0061] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0062] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0063] like Figures 1 to 4 As shown, at least one embodiment provides a bubble generator, including: a venturi tube 1, the side wall of which has an air tube 10 communicating with the throat of the venturi tube 1; one end of the venturi tube 1 is connected to a water inlet pipe, and liquid flows through the venturi tube 1 to a housing 2. The housing 2 has one end fitted onto the outer wall of the outlet end of the venturi tube 1; a spacer 21 is fitted onto the outer wall of the venturi tube 1, and the outer wall of the spacer 21 abuts against the inner wall of the housing 2; the spacer 21 is threaded and fixed to the housing 2, and the spacer 21 has two mounting holes for threaded tightening. One end of a main shaft 30 is inserted into the venturi tube 1, and a waterproof plug 22 is fitted onto its outer wall. The outlet end of the venturi tube 1 has a circular groove, and the waterproof plug 22 is fitted onto the end of the main shaft 30 and located within the circular groove, with a sealing ring sealing the waterproof plug 22 and the main shaft 30. The surface of the waterproof plug 22 is slightly higher than the surface of the circular groove to facilitate the installation and removal of the waterproof plug 22.
[0064] Reference Appendix Figure 1The bubble refining component 3 is rotatably disposed within the housing 2 for rotating and shearing bubbles; the bubble micronization component 4 is rotatably disposed within the housing 2 near the outlet, and rotates in the opposite direction to the bubble refining component 3; wherein, when the liquid flows from the Venturi tube 1 towards the housing 2, the gas flows into the Venturi tube 1 through the gas pipe 10; when the gas-liquid two-phase fluid flows towards the bubble refining component 3, the bubble refining component 3 guides the gas-liquid two-phase fluid vortex to accelerate and shear the bubbles; when the gas-liquid two-phase fluid flows towards the bubble micronization component 4, the bubble micronization component 4 guides the gas-liquid two-phase fluid to rotate in the opposite direction and refine the bubbles again. With the cooperation of the Venturi tube 1, the bubble refining component 3 and the bubble micronization component 4, when the liquid flows from the Venturi tube 1 to the shell 2, the gas is adsorbed into the Venturi tube 1 by negative pressure and forms a gas-liquid two-phase fluid. When the gas-liquid two-phase fluid flows through the bubble refining component 3, the gas-liquid two-phase fluid forms a vortex and accelerates its flow, while the first rotating blade 32 rotates in the forward direction to shear the bubbles. When the gas-liquid two-phase fluid flows through the bubble micronization component 4, the direction of the vortex formed by the gas-liquid two-phase fluid changes, and the second rotating blade 42 rotates in the reverse direction to further shear the bubbles.
[0065] Reference Appendix Figure 4 The Venturi tube 1 includes a hyperbolic converging tube 11 and a stepped diffuser 12, which extend along the axial direction of the Venturi tube 1. The air duct 10 is located at the throat of the hyperbolic converging tube 11. As the fluid gradually reaches the throat through the hyperbolic converging tube 11, the fluid accelerates to its maximum speed at the throat, creating a negative pressure that draws air from outside the Venturi tube 1 into the tube. The hyperbolic converging tube 11 effectively prevents energy loss, specifically avoiding the loss of kinetic energy of the fluid as it flows through the Venturi tube 1. The trachet 10 is located at the throat of the hypercurvature converging tube 11, which can draw air into the Venturi tube 1 under negative pressure, realizing automatic air intake and avoiding pressurized air delivery into the Venturi tube 1, thus reducing energy consumption. The stepped diffuser 12 is located at the outlet end of the hypercurvature converging tube 11. The stepped diffuser 12 reduces the fluid velocity gradient through a multi-step structure, reducing the probability of bubble collision and thus inhibiting the re-aggregation of bubbles. The nozzles 13 are evenly distributed on the outer wall of the outlet end of the Venturi tube 1 and face the bubble refinement component 3. When the fluid passes through the hypercurvature converging tube 11, the flow velocity gradually increases, and the gas is adsorbed into the Venturi tube 1 by negative pressure through the trachet 10 to form bubbles. When the gas-liquid two-phase fluid passes through the stepped diffuser 12, the stepped diffuser 12 is used to prevent the generated bubbles from re-aggregating.
[0066] Reference Appendix Figure 2The bubble refining component 3 includes: a first vortex disk 31, which is fitted onto the outer wall of the main shaft 30, with its outer end abutting against the inner wall of the housing 2, and has several first drainage holes 33; after the gas-liquid two-phase fluid passes through the first drainage holes 33, it forms a vortex and accelerates. At this time, the direction of the gas-liquid two-phase fluid vortex is consistent with the rotation direction of the first rotating cutting blade 32. The accelerated vortex impacts the first rotating cutting blade 32, thereby driving the first rotating cutting blade 32 to rotate. The rotation of the first rotating cutting blade 32 can shear the bubbles in the gas-liquid two-phase fluid to achieve the effect of refining the bubbles; two first rotating cutting blades 32, which are rotatably fitted onto the outer wall of the main shaft 30 and rotate clockwise; clockwise rotation means rotation in a clockwise direction. The gas-liquid two-phase fluid forms a vortex and accelerates after passing through the first drainage holes 33; the two first rotating cutting blades 32 rotate along the vortex direction to shear the bubbles.
[0067] Continue to refer to the appendix Figure 2 The bubble micronization component 4 includes: a second vortex disk 41, which is fitted onto the outer wall of the main shaft 30, with its outer end abutting against the inner wall of the housing 2, and has several second drainage holes 43. The inclination angles of the second drainage holes 43 and the first drainage holes 33 are opposite. When the gas-liquid two-phase fluid passes through the second drainage holes 43, the second vortex disk 41 and the second drainage holes 43 are adapted to guide the gas-liquid two-phase fluid to rotate in the opposite direction, causing it to rotate counterclockwise to form a vortex. By changing the rotation direction of the gas-liquid two-phase fluid, the bubbles are further refined. Two second rotating cutting blades 42 are rotatably fitted onto the outer wall of the main shaft 30 and rotate in the opposite direction. Several micro-holes 44 are formed on the second rotating cutting blades, and the diameter of the micro-holes 44 is smaller than the diameter of the fine holes 34. When the second rotating cutting blades 42 rotate in the opposite direction, the micro-holes 44 are used to further spin-cut and refine the bubbles. The fine holes 34 with even smaller diameters achieve further rotational refinement of the bubbles. In this process, the gas-liquid two-phase fluids rotate in opposite directions after passing through the second inlet hole 43, forming a vortex; thereby driving the second rotating cutting blade 43 to rotate, and the two second rotating cutting blades 42 rotate along the vortex direction to further shear the bubbles.
[0068] Furthermore, the rotational speed ratio between the second rotating blade 42 and the first rotating blade 32 is 1:(0.4-0.7). In this embodiment, the rotational speeds of the second rotating blade 42 and the first rotating blade 32 are related to the water flow pressure. In this embodiment, the rotational speed ratio is such that the first rotating blade 32 achieves a rotational speed of 4000-6000 rpm under a water flow pressure of 0.3-0.6 MPa.
[0069] Reference Appendix Figure 2To reduce bubble aggregation, the first rotating cutting blade 32 has several fine holes 34. When the first rotating cutting blade 32 rotates in the forward direction, the fine holes 34 are used to spin-cut the bubbles. This further improves the spin-cutting of bubbles in the gas-liquid two-phase fluid, thereby achieving bubble refinement. The ratio of the pore diameter of the micropore 44 to the pore diameter of the fine hole 34 is 1:2; wherein, when the gas-liquid two-phase fluid flows from the first rotating cutting blade 32 to the second rotating cutting blade 42, the fine holes 34 are used to further spin-cut and refine the bubbles.
[0070] Continue to refer to the appendix Figure 2 To improve the stability of the two first rotating cutting blades 32, a first stepped bushing 35 is fixed to the outer wall of the main shaft 30, and the first stepped bushing 35 is located between the two first rotating cutting blades 32. The first rotating cutting blades 32 are sleeved on the outer wall of the main shaft 30 by bearings to reduce the friction when the first rotating cutting blades 32 rotate relative to the main shaft 30. Preferably, waterproof sealing rings are provided at both ends of the bearings. Preferably, a second stepped bushing 45 is also fixed to the outer wall of the main shaft 30, and the second stepped bushing 45 is located between the two second rotating cutting blades 42.
[0071] Reference Appendix Figure 2 and 4 A friction guide plate 20 is provided on the inner wall of the housing 2 near the outlet. The outer wall of the friction guide plate 20 is provided with several stepped platforms along the axial direction to elongate and refine the bubbles. After the gas-liquid two-phase fluid passes through the Venturi tube 1, the bubble refining component 3 and the bubble micronization component 4 in sequence, it flows towards the outlet of the housing 2. The gas-liquid two-phase fluid impacts the friction guide plate 20, and the bubbles are further elongated and refined by the stepped platforms on the outer wall of the friction guide plate 20, and finally guided to the outlet of the housing 2.
[0072] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0073] 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., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.
[0074] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A bubble generator, characterized in that, include: Venturi tube (1), with a trachea (10) on its side wall that communicates with the throat of the Venturi tube (1). The shell (2) is fitted at one end to the outer wall of the outlet end of the venturi tube (1); The bubble refining component (3) is rotatably disposed within the housing (2) for rotating and shearing bubbles; The bubble microforming component (4) is rotatably disposed inside the housing (2) near the outlet, and its rotation direction is opposite to that of the bubble refining component (3); When the liquid flows from the Venturi tube (1) toward the shell (2), the gas is drawn into the Venturi tube (1) through the trachea (10); The gas-liquid two-phase fluid drives the bubble refining component (3) to rotate, and the bubble refining component (3) rotates in the forward direction and shears the bubbles; The gas-liquid two-phase fluid drives the bubble micro-component (4) to rotate. The bubble micro-component (4) rotates in the opposite direction and at a different speed relative to the bubble refinement component (3) to refine the bubbles again.
2. The bubble generator as described in claim 1, characterized in that, The Venturi tube (1) includes: A hyperbolic constricting tube (11) with a trachea (10) at its throat. A stepped diffuser (12) is provided at the outlet end of the hyperbolic converging tube (11); The nozzles (13) are evenly distributed on the outer wall of the outlet end of the venturi tube (1) and face the bubble refining component (3). Among them, the fluid velocity gradually increases when passing through the hyperbola (11), and the gas is adsorbed by negative pressure through the gas tube (10) and enters the Venturi tube (1) to form bubbles; When a gas-liquid two-phase fluid passes through a stepped diffuser (12), the stepped diffuser (12) is used to prevent the generated bubbles from recombinizing.
3. The bubble generator as described in claim 2, characterized in that, The bubble refining component (3) includes: The first vortex disk (31) is fitted on the outer wall of the main shaft (30) and has several first drainage holes (33). Two first rotating cutting blades (32) are rotatably mounted on the outer wall of the main shaft (30) and rotate in the positive direction; Among them, after the gas-liquid two-phase fluid passes through the first drainage hole (33), the first drainage hole (33) guides the gas-liquid two-phase fluid to form a vortex, so as to increase its flow rate; The two first rotating blades (32) rotate along the vortex direction to shear the bubbles.
4. The bubble generator as described in claim 3, characterized in that, The bubble microforming component (4) includes: The second vortex disk (41) is fitted on the outer wall of the main shaft (30) and has several second drainage holes (43), the second drainage holes (43) having an inclination angle opposite to that of the first drainage hole (33); Two second rotating blades (42) are rotatably mounted on the outer wall of the main shaft (30) and rotate in the opposite direction to the first rotating blade (32); Among them, after the gas-liquid two-phase fluid passes through the second guide hole (43), the second guide hole (43) guides the gas-liquid two-phase fluid to rotate in the opposite direction and form a vortex; The two second rotating blades (42) rotate along the vortex direction to further shear the bubbles.
5. The bubble generator as described in claim 4, characterized in that, The rotational speed ratio of the second rotating blade (42) to the first rotating blade (32) is 1:(0.4-0.7).
6. The bubble generator as described in claim 3, characterized in that, The first rotating blade (32) has several fine holes (34). When the first rotating blade (32) rotates in the forward direction, the fine holes (34) are used to cut the air bubble.
7. The bubble generator as described in claim 6, characterized in that, The second rotating blade (42) has several micro-holes (44). When the second rotating blade (42) rotates in the opposite direction, the micro-holes (44) are used to further spin-cut and refine the bubbles.
8. The bubble generator as described in claim 7, characterized in that, The ratio of the diameter of the micropore (44) to the diameter of the fine pore (34) is 1:2; When the gas-liquid two-phase fluid flows from the first rotating blade (32) to the second rotating blade (42), the fine holes (34) are used to further spin-cut and refine the bubbles.
9. The bubble generator as described in claim 4, characterized in that, A friction guide plate (20) is provided on the inner wall of the shell (2) near the outlet. The outer wall of the friction guide plate (20) is provided with several stepped platforms along the axial direction for elongating and refining bubbles.
10. The bubble generator as described in claim 3, characterized in that, The outer wall of the Venturi tube (1) is fitted with a spacer (21), and the outer wall of the spacer (21) abuts against the inner wall of the shell (2); One end of the main shaft (30) is inserted into the venturi tube (1), and a waterproof plug (22) is fitted on the outer wall.