CN220809706U - Microbubble generation system applied to ship air lubrication drag reduction system - Google Patents
Microbubble generation system applied to ship air lubrication drag reduction system Download PDFInfo
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- CN220809706U CN220809706U CN202322354197.6U CN202322354197U CN220809706U CN 220809706 U CN220809706 U CN 220809706U CN 202322354197 U CN202322354197 U CN 202322354197U CN 220809706 U CN220809706 U CN 220809706U
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- 230000009467 reduction Effects 0.000 title claims abstract description 34
- 238000005461 lubrication Methods 0.000 title claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 238000003466 welding Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052799 carbon Inorganic materials 0.000 abstract description 7
- 238000004134 energy conservation Methods 0.000 abstract description 5
- 238000001179 sorption measurement Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 abstract description 2
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- 238000010586 diagram Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
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Abstract
The utility model discloses a microbubble generation system applied to a ship air lubrication drag reduction system, and particularly relates to the field of energy conservation and carbon reduction in shipping industry, the microbubble generation system comprises an air source device, wherein the outer wall of the air source device is fixedly connected with an air inlet pipe, a check valve is fixedly connected to the air inlet pipe, one end of the air inlet pipe is fixedly connected with a rotary liquid flow microbubble generator, the outer wall of the rotary liquid flow microbubble generator is fixedly connected with a ship body, the problem of bubble escape in a conventional air layer drag reduction system is solved by utilizing the characteristics of microbubbles, the specific surface area of the microbubbles is larger, experiments prove that the specific surface area is the most important factor for determining the adsorption performance of the bubbles, the huge surface area of the microbubbles endows the bubbles with stronger adsorption capacity, the advantages of the specific surface area of the microbubbles is larger, the contact area between a ship and the bubbles (air) can be improved, and the drag reduction effect is obvious.
Description
Technical Field
The utility model relates to the technical field of energy conservation and carbon reduction in shipping industry, in particular to a micro-bubble generation system applied to a ship air lubrication drag reduction system.
Background
Along with the increase of the international convention on the control force of the carbon emission of ships and the implementation of the national 'double carbon' strategy, the energy conservation and carbon reduction of the shipping industry are also a trend. In order to promote energy conservation and carbon reduction of the shipping industry, the international maritime organization IMO of the global shipping industry management agency, at MEPC77 meeting, has passed the resolution of accounting the bubble lubrication drag reduction system into the ship design energy efficiency index EEDI/EEXI. The ship bubble lubrication drag reduction system is an important technical approach for reducing the underwater resistance of the ship to realize energy conservation and carbon reduction of the ship and improve the voyage. Air lubrication drag reduction is an effective way to improve ship drag by the principle that air is pumped out of small holes in the hull of the ship bottom rapidly, where the honeycomb bubbles contact the surface of the ship bottom and form a layer of bubbles outside the ship bottom, reducing the wet surface area of the ship. Because the resistance of the air is far smaller than that of the water, the larger the area of the air contacted with the bottom of the ship is, the smaller the running resistance of the ship is, so that the resistance of the ship during navigation can be reduced, and the propulsion efficiency is further improved. When the ship moves forward, the bubbles attached to the hull slide backward and are finally removed from the surface of the bottom of the hull.
Through searching, the prior patent (publication number: CN 114435534A) discloses a bubble lubrication drag reduction system and a ship, comprising an air compressor, an air pipeline and a bubble generation device; the bubble generating device comprises a top plate, a side plate, an exhaust pore plate, a diversion curved plate and a flow removal curved plate; the exhaust pore plate is positioned below the top plate, and the top plate, the side plates and the exhaust pore plate are surrounded to form a compressed air cavity; the air outlet of the air compressor is connected with the compressed air cavity through an air pipeline; along the ship advancing direction, the top of water conservancy diversion curved plate is connected in the front side of exhaust orifice plate, and the top of going the flow curved plate is connected in the rear side of exhaust orifice plate, and water conservancy diversion curved plate and go the flow curved plate and crooked towards the direction that deviates from each other respectively. The utility model relieves the technical problem of poor drag reduction effect of the bubble lubrication drag reduction system arranged on the ship in the prior art. In the process of realizing the utility model, the following problems are found in the prior art: the conventional gas layer drag reduction system also has the problems that millimeter-sized bubbles are easy to escape (particularly, the bubbles escape is more serious after the draft of the heavy load working condition of the ship is increased) and the like. ;
therefore, a microbubble generation system applied to a ship air lubrication drag reduction system is proposed for the above problems.
Disclosure of utility model
Aiming at the defects of the prior art, the utility model aims to provide the micro-bubble generation system applied to the ship air lubrication drag reduction system, which has the advantages that the micro-bubbles have large specific surface area, so that the contact air with the ship bottom in a larger area can reduce the resistance, and meanwhile, the micro-bubbles have low rising speed in water, so that the problem of rising and escaping of the bubbles can be effectively solved.
The utility model provides the following technical scheme, which is adopted by a micro-bubble generation system applied to a ship air lubrication drag reduction system, and is as follows: the device comprises an air source device, wherein the outer wall of the air source device is fixedly connected with an air inlet pipe, a check valve is fixedly connected to the air inlet pipe, one end of the air inlet pipe is fixedly connected with a rotary liquid flow microbubble generator, and the outer wall of the rotary liquid flow microbubble generator is fixedly connected with a ship body;
The marine pipeline is characterized in that a water inlet opening of the outer wall of the ship body is fixedly connected with a submarine grating and a submarine valve, a water inlet pipe is fixedly connected to the submarine valve, one end of the water inlet pipe is fixedly connected with a booster pump, the inner wall of the ship body is fixedly connected with an ultrasonic sounding unit, and the top of the ship body is fixedly connected with a detection control system.
Preferably, the air source device is communicated with the rotary liquid flow micro-bubble generator through an air inlet pipe, and the water inlet pipe is communicated with the rotary liquid flow micro-bubble generator.
Preferably, the subsea valve is connected to the rotary flow microbubble generator through the water inlet pipe, and a penetrating structure is formed between the water inlet pipe and the rotary flow microbubble generator.
As an optimal scheme, the air source device comprises a connecting pipe positioned at the end head of the air inlet pipe, the top of the connecting pipe is fixedly connected with an air compressor, and the top of the air compressor is fixedly connected with an air bottle.
As a preferable scheme, an integrated structure is formed between the water inlet pipe and the rotary liquid flow micro-bubble generator through welding, and an integrated structure is formed between the air inlet pipe and the rotary liquid flow micro-bubble generator through welding.
A microbubble generating system applied to a ship air lubrication drag reduction system comprises the following steps:
Firstly, an air source device uses an air compressor to send air in an air bottle into an air inlet pipe when air inflow work is performed, the air enters a rotary liquid flow micro-bubble generator after passing through a check valve, the check valve works to prevent air from flowing back after the air enters the rotary liquid flow micro-bubble generator, and the air is used for generating air bubbles in the rotary liquid flow micro-bubble generator in the back flowing process;
When the air source device performs air injection into the rotary liquid flow micro-bubble generator, water enters the water inlet pipe through the subsea valve, is pressurized by the booster pump after passing through the water inlet pipe, is injected into the rotary liquid flow micro-bubble generator to be mixed with air, and generates a gas-liquid mixture in the mixing process, the gas-liquid mixture is discharged from the rotary liquid flow micro-bubble generator, and bubbles are attached to the bottom of the ship body after being discharged to reduce friction;
Step three, the control system monitors the running state of the air source device, the opening and closing of the sea valve of the check valve, the air supply pressure in the rotary liquid flow microbubble generator and the like, and is responsible for safety alarm, system shutdown and the like;
And fourthly, the ship body around the exhaust unit is provided with an ultrasonic sounding unit, and the ultrasonic sounding unit emits specific low-power pulse ultrasonic waves to prevent marine organisms on the ship body outer plate from adhering to cause the blockage of the exhaust hole.
Compared with the prior art, the utility model provides the micro-bubble generation system applied to the ship air lubrication drag reduction system, which has the following beneficial effects.
In order to solve the problem of bubble escape in a gas layer drag reduction system, gas (large bubbles) is involved in vortex water flow, then the vortex is broken down to crush the bubbles, and then the bubbles are discharged in the form of micron bubbles through an outlet nozzle.
The rotary liquid flow microbubble generator is in a cylinder shape and is divided into a liquid inlet, an air inlet and an injection port, liquid enters the rotary liquid flow microbubble generator through the booster pump, rotary water flow is formed in the cylinder, the rotary water flow center can form negative pressure to suck gas into the rotary water flow according to the Bernoulli principle, after the rotary water flow center is mixed with the water flow, the gas-liquid mixture is injected through the injection port to form microbubbles, the water flow of the rotary liquid flow microbubble generator can reach 12 liters/min, the central rotation speed can reach 300-600 revolutions/sec, and the generated bubbles are 10-50 microns in size.
Meanwhile, the problem of bubble escape in a conventional gas layer drag reduction system is solved by utilizing the characteristics of microbubbles, the specific surface area of the microbubbles is larger, experiments prove that the specific surface area is the most important factor for determining the adsorption performance of the bubbles, the strong adsorption capacity is given to the microbubbles by the huge surface area of the microbubbles, the advantage of large specific surface area of the microbubbles can be improved, the contact area between a ship and the bubbles (air) can be increased, and the drag reduction effect is obvious.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic diagram of a rotary fluid flow microbubble generator according to the present utility model;
FIG. 3 is a schematic view of a gas-liquid mixer according to the present utility model;
FIG. 4 is a schematic diagram of the forward section of the rotary fluid flow microbubble generator of the present utility model;
FIG. 5 is a schematic diagram of the air source device of the present utility model.
In the figure: 1. an air source device; 101. an air bottle; 102. an air compressor; 103. a connecting pipe; 2. an air inlet pipe; 3. a check valve; 4. a subsea grid; 5. a water inlet pipe; 6. a subsea valve; 7. a booster pump; 8. rotating the liquid flow microbubble generator; 9. an ultrasonic sound generating unit; 10. a detection control system; 11. a hull.
Detailed Description
Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.
In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1-5, the present utility model: the utility model provides a be applied to little bubble generation system of boats and ships air lubrication drag reduction system, including air source device 1, the outer wall fixedly connected with intake pipe 2 of air source device 1, fixedly connected with check valve 3 on the intake pipe 2, the rotatory liquid flow microbubble generator 8 of one end fixedly connected with of intake pipe 2, the outer wall fixedly connected with hull 11 of rotatory liquid flow microbubble generator 8, the water inlet trompil department fixedly connected with seabed grid 4 and the sea bottom valve 6 of hull 11 outer wall, fixedly connected with inlet tube 5 on the sea bottom valve 6, the one end fixedly connected with booster pump 7 of inlet tube 5, the inner wall fixedly connected with ultrasonic sound production unit 9 of hull 11, the top fixedly connected with detection control system 10 of hull 11.
The air source device 1 is communicated with the rotary liquid flow micro-bubble generator 8 through the air inlet pipe 2, and the water inlet pipe 5 is communicated with the rotary liquid flow micro-bubble generator 8.
The subsea valve 6 is communicated with the rotary liquid flow microbubble generator 8 through the water inlet pipe 5, and a penetrating structure is formed between the air inlet pipe 2 and the water inlet pipe 5 and the rotary liquid flow microbubble generator 8.
The air source device 1 comprises a connecting pipe 103 positioned at the end of the air inlet pipe 2, the top of the connecting pipe 103 is fixedly connected with an air compressor 102, and the top of the air compressor 102 is fixedly connected with an air bottle 101.
The water inlet pipe 5 and the rotary liquid flow micro-bubble generator 8 form an integrated structure through welding, and the air inlet pipe 2 and the rotary liquid flow micro-bubble generator 8 form an integrated structure through welding.
A microbubble generating system applied to a ship air lubrication drag reduction system comprises the following steps:
Firstly, when the air inlet operation is carried out, the air source device 1 uses the air compressor 102 to send air in the air bottle 101 into the air inlet pipe 2, the air enters the rotary liquid flow microbubble generator 8 after passing through the check valve 3, the check valve 3 works to prevent air backflow after the air enters the rotary liquid flow microbubble generator 8, and the air is used for carrying out bubble generation operation in the rotary liquid flow microbubble generator 8 in the backflow process;
When the air source device 1 performs air injection into the rotary liquid flow micro-bubble generator 8, water enters the water inlet pipe 5 through the subsea valve 6, then is pressurized by the booster pump 7 after passing through the water inlet pipe 5, and is injected into the rotary liquid flow micro-bubble generator 8 to be mixed with air, a gas-liquid mixture is generated in the mixing process, the gas-liquid mixture is discharged from the rotary liquid flow micro-bubble generator 8, and bubbles are adhered to the bottom of the ship body 11 after being discharged to perform friction reduction work;
Step three, the control system 10 monitors the running state of the air source device 1, the opening and closing of the subsea valve 6 of the check valve 3, the air supply pressure in the rotary liquid flow microbubble generator 8 and the like, and takes charge of safety alarm, system shutdown and the like;
And fourthly, the ship body 11 around the exhaust unit is provided with the ultrasonic sounding unit 9, and the ultrasonic sounding unit 9 emits specific low-power pulse ultrasonic waves to prevent marine organisms on the outer plate of the ship body 11 from adhering to cause the blockage of the exhaust hole.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the scope of the present utility model, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solution of the present utility model without departing from the spirit and scope of the technical solution of the present utility model.
Claims (5)
1. The utility model provides a be applied to little bubble generation system of boats and ships air lubrication drag reduction system, includes air supply device (1), its characterized in that: the air source device is characterized in that the outer wall of the air source device (1) is fixedly connected with an air inlet pipe (2), a check valve (3) is fixedly connected to the air inlet pipe (2), one end of the air inlet pipe (2) is fixedly connected with a rotary liquid flow microbubble generator (8), and the outer wall of the rotary liquid flow microbubble generator (8) is fixedly connected with a ship body (11);
The marine ship is characterized in that a submarine grid (4) and a submarine valve (6) are fixedly connected to a water inlet opening of the outer wall of the ship body (11), a water inlet pipe (5) is fixedly connected to the submarine valve (6), a booster pump (7) is fixedly connected to one end of the water inlet pipe (5), an ultrasonic sounding unit (9) is fixedly connected to the inner wall of the ship body (11), and a detection control system (10) is fixedly connected to the top of the ship body (11).
2. The microbubble generation system for use in a marine air lubrication drag reduction system of claim 1, wherein: the air source device (1) is communicated with the rotary liquid flow micro-bubble generator (8) through the air inlet pipe (2), and the water inlet pipe (5) is communicated with the rotary liquid flow micro-bubble generator (8).
3. The microbubble generation system for use in a marine air lubrication drag reduction system of claim 1, wherein: the subsea valve (6) is communicated with the rotary liquid flow micro-bubble generator (8) through the water inlet pipe (5), and a penetrating structure is formed between the air inlet pipe (2) and the rotary liquid flow micro-bubble generator (8) and between the water inlet pipe (5) and the rotary liquid flow micro-bubble generator.
4. The microbubble generation system for use in a marine air lubrication drag reduction system of claim 1, wherein: the air source device (1) comprises a connecting pipe (103) positioned at the end of the air inlet pipe (2), the top of the connecting pipe (103) is fixedly connected with an air compressor (102), and the top of the air compressor (102) is fixedly connected with an air bottle (101).
5. The microbubble generation system for use in a marine air lubrication drag reduction system of claim 1, wherein: the water inlet pipe (5) and the rotary liquid flow micro-bubble generator (8) form an integrated structure through welding, and the air inlet pipe (2) and the rotary liquid flow micro-bubble generator (8) form an integrated structure through welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322354197.6U CN220809706U (en) | 2023-08-31 | 2023-08-31 | Microbubble generation system applied to ship air lubrication drag reduction system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322354197.6U CN220809706U (en) | 2023-08-31 | 2023-08-31 | Microbubble generation system applied to ship air lubrication drag reduction system |
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| Publication Number | Publication Date |
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| CN220809706U true CN220809706U (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322354197.6U Active CN220809706U (en) | 2023-08-31 | 2023-08-31 | Microbubble generation system applied to ship air lubrication drag reduction system |
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| Country | Link |
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| CN (1) | CN220809706U (en) |
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- 2023-08-31 CN CN202322354197.6U patent/CN220809706U/en active Active
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