CN105857511A - Micro bubble generator and diffusion crushing technology-based ship micro bubble generating device - Google Patents
Micro bubble generator and diffusion crushing technology-based ship micro bubble generating device Download PDFInfo
- Publication number
- CN105857511A CN105857511A CN201610208001.4A CN201610208001A CN105857511A CN 105857511 A CN105857511 A CN 105857511A CN 201610208001 A CN201610208001 A CN 201610208001A CN 105857511 A CN105857511 A CN 105857511A
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- China
- Prior art keywords
- shell
- inlet pipe
- water inlet
- bubble
- fluid core
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
- B63B1/32—Other means for varying the inherent hydrodynamic characteristics of hulls
- B63B1/34—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction
- B63B1/38—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction using air bubbles or air layers gas filled volumes
-
- 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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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
Abstract
The invention discloses a micro bubble generator, comprising a bubble nozzle, a fluid core, a shell and an end cover. A water inlet is formed in the shell or the end cover; the fluid core is of a hollow shuttle structure, and an exhaust vent is formed around the maximum diameter of the cross section of the fluid core; the fluid core is arranged in the shell of the bubble generator; one end of the shell is sealed by the end cover and the other end of the shell is provided with the bubble nozzle. A diffusion crushing technology-based 10000-ton class ship micro bubble generating device comprises a water inlet pipe, a filter unit, a water pump, a connection hose, the micro bubble generator, an air inlet pipe and an air blower. The water inlet pipe is connected with the water pump; the filter unit is arranged on the water inlet pipe; the water pump is connected with the water inlet of the micro bubble generator through the connection hose; an air inlet of the micro bubble generator is connected with the air blower through the air inlet pipe. The micro bubble generator and the diffusion crushing technology-based ship micro bubble generating device overcome the problems that, in the existing air curtain drag reduction technology, small air bubble diameter and great air flow cannot be realized simultaneously, the manufacturing cost is high, and manufacturing is difficult.
Description
Technical field
The invention belongs to boats and ships air curtain drag reduction field, be mainly directed towards large-sized low-speed cargo ship, be specifically related to a kind of micro-
Bubble generator and vessel by microbubbles generating means based on diffusion crushing technology.
Background technology
Shipping is topmost means of transportation in international logistics, with cargo ship, oil tanker, container ship as representative
Large transport ship assume responsibility for the Circulation of the resource such as Ore more than 90%, oil, goods in the world, this
Class shipping sail speed is low, and wave making resistance is the least, and viscous drag accounts for the 70%-80% of drag overall, viscous by reducing
Property resistance can be greatly saved shipping oil consumption.
Ship Drag Reduction by Bubble Curtain is to form a micro-bubbles alow with a large amount of microbubble, upsets former border
The fluid behaviour of layer.Hull is separated from water by a certain extent, utilizes the physical difference of air and water, energy
Effectively reduce the shear stress of water and ship wall.In conjunction with Ship model test data both domestic and external, drag reducing efficiency up to
10%-30%, and optional equipment power the most only accounts for the 1%-3% of shipowner's acc power, has huge energy-saving and emission-reduction
Potentiality.
Existing air curtain Research of Drag Reduction focuses mostly in ship form design, generator layout etc., and studies bubble
Seldom, mostly using porous plate air blast to produce bubble, this mode is processed more convenient, but uses sintering many
Spraying bubble between orifice plate adjacent cells to influence each other polymerization, the bubble diameter of generation is bigger；Jet resistance is relatively simultaneously
Greatly, aerator wasted work increases, and effect is undesirable, hinders the actual application of Drag Reduction by Bubble Curtain.Other are correlated with
Defect in technology and actual application is as follows: chemical reaction method: cost is high, easily causes the secondary of water body
Pollute, be not suitable for directly using in natural water.Electrolysis: producing microbubble power consumption height, bubble yield is little,
It is unfavorable for popularization and application in actual industrial production.Dispersion air method: high-power and high-speed motor realizes shear agitation,
The manufacture requirements of equipment is higher, and difficulty of processing is bigger.
Will be effectively in view of large-minded, bubble needed for the actual demand to bubble generator of the boats and ships air curtain drag reduction
Diameter is little and low in energy consumption, just can design the device being more preferably applied to boats and ships, it is therefore necessary to existing device
Improve.
Summary of the invention
It is an object of the invention to solve problems of the prior art, and a kind of microbubble generator is provided.
For achieving the above object, the technical solution adopted in the present invention is as follows:
A kind of microbubble generator, including bubble spout, fluid core, shell and end cap；Described shell or end
Cover and offer water inlet；The hollow fusiformis structure that described fluid core is the most small in the end and big in the middle, its
Body is provided with air inlet, and at cross-sectional diameter maximum around offering steam vent；Fluid core is positioned over bubble
In generator shell, the cross-sectional area in the interior space in addition to fluid core of shell is made to be gradually reduced to centre by two ends；
Described shell one end is by end cap seal, and the other end is the bubble spout being connected with the external world.
It mostly is the distribution of centralized cylinder, such as Venturi tube relative to the most relatively conventional throat's design.On an equal basis
Under circulation area, the wetted perimeter of centralized configuration is little, and the quantity of fumarole can not be too many, arranges also the tightest
Gather.By this structure when throat sprays bubble, the most easily interfere between each spray orifice, be not therefore suitable for
Boats and ships need the occasion of a large amount of jets.The present invention innovatively uses ring-like throat to design, with cross section, homalographic lower larynx portion
Wetted perimeter doubles, and micropore is arranged and more disperseed, and the bubble of adjacent cells ejection occurs the probability of interference polymerization
Lower, the micropore of greater number and form can be designed, meet broad-minded actual demand in boats and ships air curtain drag reduction.
, designing compared to centralized throat, the exit region of each spray orifice of this device is the narrowest, and disturbance is more meanwhile
Acutely, it is simple to the secondary of diffuser tears up.
In prior art, the concern to boats and ships air curtain drag reduction bubble generator and bubble acceptable level is considerably less.This leads
Cause problems with: one, in order to reach more qualified bubble, use complicated unmanageable design structure, device
Big energy-consuming, jet amount is limited serious and weak effect.Or, move back and ask secondary, expand jet aperture, cause bubble
Diameter does not meets the concept of Friction Reduction by Micro-bubbles, and the result tested does not has too many associated reference in Drag Reduction by Bubble Curtain
It is worth.
The present invention is actual considers above contradiction, innovatively applies bubbles burst in turbulent flow theoretical, passes through pressure reduction
The diffuser design of acute variation, makes the kinetic energy of throat's fluid be quickly converted to pressure energy, forms vigorous turbulent flow
District.In the case of turbulence, the impact of bubble surface pressure fluctuation has exceeded bubble surface tension force
Impact, bubble occurs substantially to rupture, and the bubble of throat's ejection is smashed again, straight to ensure produced bubble
Footpath meets air curtain drag principle requirement.
As preferably, described fluid core and shell are coaxially disposed, and in shell, the space in addition to fluid core is along stream
Body core substantially symmetrical about its central axis, makes the generation of current and bubble be more uniformly distributed
Another object of the present invention is to provide a kind of ton vessel by microbubbles based on diffusion crushing technology to send out
Generating apparatus, including water inlet pipe, defecator, water pump, connection flexible pipe, microbubble as claimed in claim 1
Generator, air inlet pipe and aerator；Described water inlet pipe is connected with water pump, and water inlet pipe is provided with defecator；
Water pump is connected with the water inlet of microbubble generator by connecting flexible pipe；The air inlet of microbubble generator pass through into
Trachea is connected with aerator.Defecator filters out the impurity in sea water, it is to avoid blocking water pipe or fluid core ring
Pore in shape throat.
As preferably, described connection flexible pipe has 3, and water inlet has 3, is arranged in equilateral triangle
On end cap, and it is connected with water pump by four-way connection,.
As preferably, the described flexible pipe that connects is provided with the first electromagnetic flowmeter for measuring water velocity.
As preferably, described air inlet pipe is provided with the second electromagnetic flowmeter for measuring air velocity.
Air inlet pipe and water inlet pipe are respectively mounted electromagnetic flowmeter, are used for measuring gas flow rate and water inlet flow velocity, just
Best drag-reduction effect is reached in coutroi velocity.
The present invention according to bulk transport ship based on viscous drag, large-minded needed for drag reduction, diameter is little, install
The features such as power is little and Design and Machining is the simplest, in conjunction with air curtain drag reduction, turbulent flow bubble breaking scheduling theory, pin
Pluses and minuses to domestic and international study model, it is proposed that the annular throat jet district of device different from the past and secondary break
Broken diffusion district, the actual demand of shipping of more preferably fitting and feature.Thus, existing Drag Reduction by Bubble Curtain is overcome
Present in be difficult to meet the problem that bubble diameter is little and large-minded and manufacturing cost is high, manufacture difficulty simultaneously.
Accompanying drawing explanation
Fig. 1 is bubble generator profile；
Fig. 2 is the fluid cored structure schematic diagram of the present invention；
Fig. 3 is the end cover structure schematic diagram of the present invention；
Fig. 4 is the bubble spout structure schematic diagram of the present invention；
Fig. 5 is vessel by microbubbles generating means structural representation；
In figure: 1-water inlet pipe, 2-defecator, 3-water pump, 4-electromagnetic flowmeter, 5-four-way connection, 6-connects flexible pipe,
7-bubble spout, 8-bubble generator fluid core, 9-bubble generator shell, 10-end cap, 11-air inlet pipe,
12-electromagnetic flowmeter, 13-aerator
Detailed description of the invention
With embodiment the present invention it is further elaborated below in conjunction with the accompanying drawings and illustrates.Each embodiment party in the present invention
The technical characteristic of formula, on the premise of not colliding with each other, all can carry out respective combination.
As illustrated in fig. 1 and 2, a kind of microbubble generator, including bubble spout 7, fluid core 8, shell 9
With end cap 10；Water inlet is offered on described shell 9 or end cap 10；Described fluid core 8 diametrically in
Between hollow fusiformis structure big, small in ends, its body is provided with air inlet, and at cross-sectional diameter maximum ring
Around offering steam vent.Fluid core 8 is positioned in bubble generator shell 9, removes fluid core 8 in making shell 9
Outside the cross-sectional area in space be gradually reduced to centre by two ends；Described shell 9 one end is close by end cap 10
Envelope, the other end is the bubble spout 7 being connected with the external world.Fluid core 8 and shell 9 are coaxially disposed, in shell 9
Space in addition to fluid core 8 is substantially symmetrical about its central axis along fluid core 8.As shown in Figure 4, fluid core 8 end can
It is fixed on shell 9 by support, but the passage that current pass through need to be reserved.
Above-mentioned microbubble generator is installed on steamer, devises a kind of based on diffusion crushing technology further
Ton vessel by microbubbles generating means.As it is shown in figure 5, device includes water inlet pipe 1, defecator 2, water
Pump 3,3 connects flexible pipe 6, microbubble generator as claimed in claim 1, air inlet pipe 11 and aerator
13；Described water inlet pipe 1 is connected with water pump 3, and water inlet pipe 1 is provided with defecator 2.As it is shown on figure 3,
Water pump 3 connects flexible pipe 6 by 3 and is connected with 3 water inlets of microbubble generator.Water inlet is equilateral three
Dihedral is arranged on end cap 10.The air inlet of microbubble generator is connected with aerator 13 by air inlet pipe 11.
Connect flexible pipe 6 and be provided with the first electromagnetic flowmeter 4 for measuring water velocity.Air inlet pipe 11 be provided with for
Measure the second electromagnetic flowmeter 12 of air velocity.
During use, bubble generator is disposed vertically in hull bottom, and upward, bottom covers hull bottom just in end cap side
Bubble spout, makes the microbubble of generation can all emerge and be covered in hull bottom.Scalable water pump 3 passes through water inlet pipe
1 sucks sea water, and defecator 2 filters out the impurity in sea water, it is to avoid blocking water pipe or fluid core 8 annular
Pore in throat.Water pump 3 connects flexible pipe 6 by four-way connection 5 and three and is pumped into certain speed by sea water
In bubble generator.While water pump 3 works, aerator 13 passes through air inlet pipe 11 by air with a constant speed
It is internal that degree blasts fluid core 8.Electromagnetic flowmeter 4 and electromagnetic flowmeter 12 measure water speed and air velocity respectively,
It is easy to water pump 3 and the regulation of aerator 13, makes drag-reduction effect reach optimal.
Bubble generator is divided into inlet segment, gas injection section, three parts of diffuser along water velocity direction.Work as device
When normally working, through the current internal flow forward of entrance device of water pump 3 pressurization, along with the reduction of cross-sectional area,
Water velocity is gradually increased, and enters gas injection section.The gas injection section part of fluid core 8 has pore, through aerator
The air of 13 pressurizations, enters hollow fluid core 8, is injected in water by the pore on core wall, is formed a succession of
Minute bubbles.Diffuser flow section is gradually increased, and air-water mixture produces strong turbulent flow when flowing through this active section,
The minute bubbles mixed in water are shredded, and form microbubble.Microbubble is emerged by the bubble spout 7 of hull bottom, with
Current are covered in hull bottom, form bubble layer alow, thus reach drag-reduction effect.
Embodiment described above is the one preferably scheme of the present invention, and so it is not intended to limiting the invention,
The technical scheme that all modes taking equivalent or equivalent transformation are obtained, all falls within protection scope of the present invention
In.
Claims (6)
1. a microbubble generator, it is characterised in that include bubble spout (7), fluid core (8), shell
And end cap (10) (9)；Water inlet is offered on described shell (9) or end cap (10)；Described stream
The hollow fusiformis structure that body core (8) is the most small in the end and big in the middle, its body is provided with air inlet, and
Cross-sectional diameter maximum is around offering steam vent；Fluid core (8) is positioned over bubble generator shell (9)
In, make the cross-sectional area in the interior space in addition to fluid core (8) of shell (9) be gradually reduced to centre by two ends；
Described shell (9) one end is sealed by end cap (10), and the other end is the bubble spout (7) being connected with the external world.
2. microbubble generator as claimed in claim 1, it is characterised in that described fluid core (8) and
Shell (9) is coaxially disposed, and in shell (9), the space in addition to fluid core (8) is along fluid core (8)
Mandrel is symmetrical.
3. a ton vessel by microbubbles generating means based on diffusion crushing technology, it is characterised in that bag
Include water inlet pipe (1), defecator (2), water pump (3), connect flexible pipe (6), as claimed in claim 1
Microbubble generator, air inlet pipe (11) and aerator (13)；Described water inlet pipe (1) and water pump (3)
It is connected, and water inlet pipe (1) is provided with defecator (2)；Water pump (3) is by connecting flexible pipe (6) with micro-
The water inlet of bubble generator is connected；The air inlet of microbubble generator is by air inlet pipe (11) and aerator (13)
It is connected.
4. ton vessel by microbubbles generating means based on diffusion crushing technology as claimed in claim 3, its
Being characterised by, described connection flexible pipe (6) has 3, and water inlet has 3, arranges in equilateral triangle
On end cap (10), and it is connected with water pump (3) by four-way connection (5),.
5. ton vessel by microbubbles generating means based on diffusion crushing technology as claimed in claim 3,
It is characterized in that, described connection flexible pipe (6) is provided with the first electromagnetic flowmeter (4) for measuring water velocity.
6. ton vessel by microbubbles generating means based on diffusion crushing technology as claimed in claim 3,
It is characterized in that, described air inlet pipe (11) is provided with the second electromagnetic flowmeter (12) for measuring air velocity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610208001.4A CN105857511B (en) | 2016-04-05 | 2016-04-05 | Microbubble generator and the vessel by microbubbles generating means based on diffusion crushing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610208001.4A CN105857511B (en) | 2016-04-05 | 2016-04-05 | Microbubble generator and the vessel by microbubbles generating means based on diffusion crushing technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105857511A true CN105857511A (en) | 2016-08-17 |
| CN105857511B CN105857511B (en) | 2017-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610208001.4A Expired - Fee Related CN105857511B (en) | 2016-04-05 | 2016-04-05 | Microbubble generator and the vessel by microbubbles generating means based on diffusion crushing technology |
Country Status (1)
| Country | Link |
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| CN (1) | CN105857511B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111746711A (en) * | 2020-06-03 | 2020-10-09 | 武汉理工大学 | Marine microbubble generating device |
| CN111746710A (en) * | 2020-06-03 | 2020-10-09 | 武汉理工大学 | Ship drag reduction system based on waste gas utilization |
| WO2021129460A1 (en) * | 2019-12-28 | 2021-07-01 | 天津壹龙科技有限公司 | Method and device for reducing wave-making resistance and friction force during ship navigation |
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|---|---|---|---|---|
| US4196686A (en) * | 1978-01-16 | 1980-04-08 | The United States Of America As Represented By The Secretary Of The Navy | Surface effect ship internal sidewall drag reduction device |
| JPH08225094A (en) * | 1995-02-21 | 1996-09-03 | Yoji Kato | Microbubble generating device |
| CN2652812Y (en) * | 2003-10-17 | 2004-11-03 | 武汉理工大学 | Resistance reducing micro bubble generator |
| CN201520395U (en) * | 2009-09-22 | 2010-07-07 | 武汉理工大学 | Bubble drag reduction subdivision variable-pressure air injection device |
| KR101193962B1 (en) * | 2012-01-03 | 2012-10-24 | 주식회사 동신이엔텍 | Frictional-resistance reduced ship and appartus for reducing fritional-resistance of ship |
| CN103241341A (en) * | 2013-05-22 | 2013-08-14 | 上海交通大学 | High-speed catamaran |
-
2016
- 2016-04-05 CN CN201610208001.4A patent/CN105857511B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4196686A (en) * | 1978-01-16 | 1980-04-08 | The United States Of America As Represented By The Secretary Of The Navy | Surface effect ship internal sidewall drag reduction device |
| JPH08225094A (en) * | 1995-02-21 | 1996-09-03 | Yoji Kato | Microbubble generating device |
| CN2652812Y (en) * | 2003-10-17 | 2004-11-03 | 武汉理工大学 | Resistance reducing micro bubble generator |
| CN201520395U (en) * | 2009-09-22 | 2010-07-07 | 武汉理工大学 | Bubble drag reduction subdivision variable-pressure air injection device |
| KR101193962B1 (en) * | 2012-01-03 | 2012-10-24 | 주식회사 동신이엔텍 | Frictional-resistance reduced ship and appartus for reducing fritional-resistance of ship |
| CN103241341A (en) * | 2013-05-22 | 2013-08-14 | 上海交通大学 | High-speed catamaran |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021129460A1 (en) * | 2019-12-28 | 2021-07-01 | 天津壹龙科技有限公司 | Method and device for reducing wave-making resistance and friction force during ship navigation |
| CN111746711A (en) * | 2020-06-03 | 2020-10-09 | 武汉理工大学 | Marine microbubble generating device |
| CN111746710A (en) * | 2020-06-03 | 2020-10-09 | 武汉理工大学 | Ship drag reduction system based on waste gas utilization |
| CN111746711B (en) * | 2020-06-03 | 2022-03-01 | 武汉理工大学 | Marine microbubble generating device |
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| Publication number | Publication date |
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| CN105857511B (en) | 2017-11-14 |
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| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Tao Inventor after: Tang Hairong Inventor after: Wang Ben Inventor after: Wu Siyuan Inventor after: Xu Liangju Inventor after: Han Ting Inventor before: Tang Hairong Inventor before: Wang Ben Inventor before: Wu Siyuan Inventor before: Xu Liangju Inventor before: Han Ting Inventor before: Wang Tao |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20171114 Termination date: 20190405 |