CN107676232A - A kind of modularization wind turbine blade structure and its assembly method - Google Patents
A kind of modularization wind turbine blade structure and its assembly method Download PDFInfo
- Publication number
- CN107676232A CN107676232A CN201710951822.1A CN201710951822A CN107676232A CN 107676232 A CN107676232 A CN 107676232A CN 201710951822 A CN201710951822 A CN 201710951822A CN 107676232 A CN107676232 A CN 107676232A
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- blade
- aerodynamic configuration
- load
- wind turbine
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000010276 construction Methods 0.000 claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 11
- 239000002131 composite material Substances 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 230000011218 segmentation Effects 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 210000001015 abdomen Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05B2240/302—Segmented or sectional blades
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a kind of modularization wind turbine blade structure and its manufacture method, the blade comprises at least blade tip section and blade root section, and its optimal segmentation position is located at blade maximum chord length nearby close to blade tip side.Duan Youyi open column shape load-carrying construction of blade root and multiple aerodynamic configuration profile plates composition, open column shape load-carrying construction and profile plate independently manufacture, with central hollow and supporting construction, it is easy to Nian Jie with cylinder and mitigates leaf weight, the cylindrical structure being connected with blade root section be present in blade tip section, blade tip section is connected by screw bolts with blade root section, and bolt forms complete circular in segmentation EDS maps.After the bolt connection for completing blade tip and blade root section, using the aerodynamic configuration profile plate being glued according to segmentation position.The modularization wind wheel blade can realize segment design, manufacture and the transport of linear leaf, have the characteristics of manufacture difficulty is small and structural strength is high.
Description
Technical field
The present invention relates to a kind of blade of wind-driven generator, more particularly to a kind of modularization wind turbine blade structure and its dress
Method of completing the square, belong to wind electricity blade manufacturing field.
Background technology
The utilization of a large amount of fossil energies also increases the burden of ball ecological environment while promotion technology develops, and air is dirty
Dye threatens the life and health of the mankind, and regenerative resource is increasingly becoming the energy resources of prioritizing selection, will be in various countries' energy knot
More importantly position is occupied in structure, wind energy has development cost relatively low, technology maturation, divided as a kind of renewable energy forms
The advantages that cloth is extensive, turn into the emphasis direction of Renewable Energy Development in recent years.In order to make full use of wind energy resources, wind energy conversion system
Maximization is progressively moved towards, its length of blade is also continuously increased, and the region that wind-resources enrich is often some remote mountain areas, human footmarks
Seldom desert belt extremely, transportation condition is poor, and transport linear leaf is extremely difficult, and after blade reaches certain length, this is also
Transport the scope forbidden.As can be seen here, wind energy conversion system maximization is restricted by traffic condition.
Currently, wind electricity blade is generally manufactured using fiber reinforced polymer matrix composite, and composite material blade produces
Process has the requirement of harshness to environment and technique, and many wind power plants are located in the place that dust storm is serious or humidity, salinity are very high.It is this
Under environment, the quality of production of wind electricity blade is difficult to effective guarantee, and the carbon fiber used in overlength blade, because it is to producing bar
Part is more sensitive, and leaf quality is even more unmanageable.Blade production base is built near wind power plant, and there is also office geographically
Sex-limited, radiation scope is limited, and the integrated cost of blade can be significantly increased.As can be seen here, after length of blade is to certain limit,
There are many restraining factors for being difficult to overcome in traditional integral blade, in production, transport and installation process therefore, using segmentation
Formula blade, in existing plant produced, fragmented transport, Assembling are the effective ways for solving Wind turbines maximization.
Sectional-type blade needs to assemble each part before lifting, formed continuous aerodynamic configuration, structural integrity,
Multiple functional entirety.Existing sectional-type blade it is most of on existing non-subsection blade on the basis of carry out Transform Type design,
Bolt connection is distributed on blade covering contour line, and particularly near aerofoil profile maximum gauge, blade root section still uses non-segmentation leaf
The deficiency of bolt connection fatigue strength, and the structure of blade root section and pneumatic designability be present in the conventional design of piece, this structure
It is poor.Therefore, it is necessary to the structure and its assembly method of existing wind energy conversion system sectional-type blade are improved.
The content of the invention
For the disadvantages mentioned above and deficiency of prior art, it is steady that the technical problems to be solved by the invention are to provide a kind of connection
Gu, the modularization wind turbine blade structure and its assembly connection method that aerodynamic loss is small and assembly connection is simple to operate.
According to an aspect of the present invention, the present invention is adopted the technical scheme that to solve its technical problem：
A kind of modularization wind turbine blade structure, including extend at least one blade tip section of distribution and at least one leaf
Root segment, if being linked in sequence into a blade entirety successively using bolt stem group between the blade tip section and blade root section, its feature exists
In,
-- the blade root section is fixed on including extending to the open column shape load-carrying construction of extension and attachment for independently manufacturing
Several aerodynamic configuration profile plates of the open column shape load-carrying construction periphery, set in the cavity of the aerodynamic configuration profile plate
There are some supporting constructions,
-- the blade tip section is included positioned at the tip segment of its main part and positioned at the coupling part of its root, described
Coupling part has one to open up to width and generally within blade maximum chord length opening position, including the bolt connection cylinder for load
Annex and aerodynamic configuration covering,
The bolt cylinder connection annex for load forms a closed curve, the end of the open column shape load-carrying construction
Portion is bolted is fixed on the sky in the bolt connection appendice cylindrical for load, the aerodynamic configuration covering
On the end of stem shape load-carrying construction, so as to aerodynamic configuration profile plate, the aerodynamic configuration of the coupling part of the blade root section
The aerodynamic configuration covering of covering and the tip segment forms a complete continuous wind turbine blade aerodynamic configuration, so as to protect
After demonstrate,proving each leaf segments connection, pneumatic equipment bladess integrally have good aerodynamics property.
Preferably, the tip segment is manufactured by composite, including aerodynamic configuration covering, load spar cap and shearing abdomen
Plate.
Preferably, the open column shape load-carrying construction is manufactured by composite, is preferably wrapped around moulding process.
Preferably, the aerodynamic configuration profile plate of the blade root section extends forms to by multistage, the aerodynamic configuration profile plate
Inner side sets leading edge, trailing edge supporting construction.
Preferably, each blade root section aerodynamic configuration profile plate is respectively adopted bonding way and is connected to the open column shape load knot
The outside of structure, form overall aerodynamic configuration and load-carrying construction.
Preferably, the leading edge between the pressure face and suction surface of the aerodynamic configuration covering of the coupling part and trailing edge use
Mechanically connect, convenient dismounting and maintenance.
Preferably, each bolt centerline is consistent with neighbouring laying neutral line, it is preferable that bolt upper and lower surface symmetric layups.
According to another aspect of the present invention, the present invention additionally provides a kind of modularization wind turbine to solve its technical problem
The preparation method of blade, comprises the following steps：
(1) each column load-carrying construction of separately fabricated blade tip section, blade root section and pneumatic appearance profile plate；
(2) bonding way is used, each blade root section profile sleeve-board is entered into column load-carrying construction；
(3) blade root section column load-carrying construction and blade tip section bolt connection annex are connected by screw bolts；
(4) pressure face at segmentation and suction surface aerofoil profile plate are linked together by the way of mechanically connecting, are allowed to
It is fixed on column load-carrying construction.
Compared with the existing technology, modularization wind turbine blade structure of the invention and preparation method thereof has following notable
Technique effect：
1st, modularization wind turbine blade of the invention can realize the segmentation manufactures of pneumatic equipment bladess, fragmented transport and existing
Field assembling, greatly reduces transport and manufacturing cost.
2nd, wind turbine blade blade root section of the invention is by circumferentially closed hollow column load-carrying construction and aerodynamic configuration wheel
Wide plate combines, and its outer surface has consistent aerodynamics profile, after ensureing each leaf segments connection, wind energy conversion system
Blade integrally has good aerodynamics property.
3rd, wind turbine blade linkage section of the invention is connected by screw bolts load column structure, effectively increases bolt company
Connect fatigue strength.
Brief description of the drawings
The modularization wind turbine blade connection overall schematic of Fig. 1 present invention；
Fig. 2 blade and blade root segment profiles (A-A)；
Fig. 3 blade linkage section profiles (B-B)；
Fig. 4 blade linkage sections are opened up to profile (C-C).
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in more detail.
As shown in figure 1, the modularization wind turbine blade of the present invention, including extend at least one blade tip section II to distribution
With at least one blade root section i, blade sections coupling part is located at blade maximum chord length and (B-B is cut close to the position in blade tip direction
Face), a blade entirety is linked in sequence into by the connecting bolt on open column shape load-carrying construction successively between blade sections.Blade tip
Section II is included positioned at the tip segment of its main part and positioned at the coupling part of its root, and tip segment is by composite system
Make, including aerodynamic configuration covering, load spar cap and shear web, coupling part have one to open up to width and generally within blade most
At big chord positions, including bolt connection annex and aerodynamic configuration covering for load.
As shown in Fig. 2 blade root section i from blade root profile plate 1,2, ribs 3, extend open column shape attachment structure to extension
4 compositions.Wherein each blade root aerodynamic configuration profile plate 1,2 is respectively adopted bonding way and is sequentially connected to the outer of column load-carrying construction 4
Side, the inner side of blade root profile plate 1,2 set before, trailing edge ribs 3, to form good aerodynamic configuration and overall load-carrying construction.It is empty
Stem shape load-carrying construction 4 is manufactured by composite, is preferably wrapped around moulding process.
As shown in figure 3, the bolt connection annex that blade tip section is used for load forms a closed curve, hollow load column structure
4 end is connected to the bolt connection annex for load using bolt 6, and aerodynamic configuration covering is fixed on the open column shape
On the end of load-carrying construction, in the leading edge and trailing edge of aerodynamic configuration covering pressure face and suction surface using mechanically connecting 8,9, conveniently
Dismounting and maintenance, after connection, the aerodynamic configuration profile plate of blade root section, the aerodynamic configuration covering of the coupling part and institute
The aerodynamic configuration covering for stating tip segment forms a complete continuous wind turbine blade aerodynamic configuration, so as to ensure wind energy conversion system leaf
Piece integrally has good aerodynamics property.
As shown in figure 4, each blade sections of wind turbine blade extend to connecting bolt 10 formed projection aerodynamic configuration
11, bolt centerline is consistent with neighbouring laying neutral line.Preferably, bolt upper and lower surface symmetric layups.
When multisection type blade is assembled at the scene, follow the steps below：
(1) each column load-carrying construction of separately fabricated blade tip section, blade root section and pneumatic appearance profile plate；
(2) bonding way is used, each blade root section profile sleeve-board is entered into column load-carrying construction；
(3) blade root section column load-carrying construction and blade tip section bolt connection annex are connected by screw bolts；
(4) pressure face at segmentation and suction surface aerofoil profile plate are linked together by the way of mechanically connecting, are allowed to
It is fixed on column load-carrying construction.
Particular embodiments described above, the purpose of the present invention, technical scheme and beneficial effect are carried out further in detail
Describe in detail bright.The specific embodiment that the foregoing is only the present invention is should be understood that, is not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements done etc., it should be included in the guarantor of the present invention
Within the scope of shield.
Claims (8)
1. a kind of modularization wind turbine blade structure, including extend at least one blade tip section of distribution and at least one blade root
Section, if being linked in sequence into a blade entirety successively using bolt stem group between the blade tip section and blade root section, it is characterised in that
-- what the blade root section included independently manufacturing extend be fixed on to the open column shape load-carrying construction of extension and attachment it is described
Several aerodynamic configuration profile plates of open column shape load-carrying construction periphery, if being provided with the cavity of the aerodynamic configuration profile plate
Heavenly Stems and Earthly Branches support structure,
-- the blade tip section is included positioned at the tip segment of its main part and positioned at the coupling part of its root, the connection
Part has one to open up to width and generally within blade maximum chord length opening position, including the bolt connection appendice cylindrical for load
With aerodynamic configuration covering,
The bolt connection appendice cylindrical for load forms a closed curve, and the end of the open column shape load-carrying construction leads to
Cross and be bolted to the bolt connection appendice cylindrical for being used for load, the aerodynamic configuration covering is fixed on the open tubular column
On the end of shape load-carrying construction, so as to aerodynamic configuration profile plate, the aerodynamic configuration covering of the coupling part of the blade root section
And the aerodynamic configuration covering of the tip segment forms a complete continuous wind turbine blade aerodynamic configuration.
2. modularization wind turbine blade structure according to claim 1, it is characterised in that the tip segment is by compound
Material manufacture, including aerodynamic configuration covering, load spar cap and shear web.
3. modularization wind turbine blade structure according to claim 1, it is characterised in that the open column shape load knot
Structure is manufactured by composite, is preferably wrapped around moulding process.
4. modularization wind turbine blade structure according to claim 1, it is characterised in that the blade root section it is pneumatic outer
Shape profile plate extends to be formed to by multistage, and leading edge, trailing edge supporting construction are set on the inside of the aerodynamic configuration profile plate.
5. modularization wind turbine blade structure according to claim 4, it is characterised in that each blade root section aerodynamic configuration wheel
The outside that bonding way is connected to the open column shape load-carrying construction is respectively adopted in wide plate, forms overall aerodynamic configuration and load
Structure.
6. the modularization wind turbine blade structure according to any of the above-described claim, it is characterised in that the connection
Leading edge and trailing edge between the pressure face and suction surface of partial aerodynamic configuration covering are conveniently dismantled and tieed up using mechanically connecting
Shield.
7. according to the modularization wind turbine blade structure described in any one of described claim, it is characterised in that in each bolt
Heart line is consistent with neighbouring laying neutral line, it is preferable that bolt upper and lower surface symmetric layups.
8. the assembly method of the wind turbine blade according to any of the above-described claim, it is characterised in that including as follows
Manufacturing step：
(1) each open column shape load-carrying construction of separately fabricated blade tip section, blade root section and pneumatic appearance profile plate；
(2) bonding way is used, each blade root section aerodynamic configuration profile sleeve-board is entered into open column shape load-carrying construction；
(3) blade root section open column shape load-carrying construction and blade tip section bolt connection annex are connected by screw bolts；
(4) coupling part pressure face and suction surface aerofoil profile plate are linked together by the way of mechanically connecting, is allowed to solid
It is scheduled on open column shape load-carrying construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710951822.1A CN107676232B (en) | 2017-10-13 | 2017-10-13 | Modularized wind turbine blade structure and assembly method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710951822.1A CN107676232B (en) | 2017-10-13 | 2017-10-13 | Modularized wind turbine blade structure and assembly method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107676232A true CN107676232A (en) | 2018-02-09 |
| CN107676232B CN107676232B (en) | 2024-03-26 |
Family
ID=61140079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710951822.1A Active CN107676232B (en) | 2017-10-13 | 2017-10-13 | Modularized wind turbine blade structure and assembly method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN107676232B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139549A (en) * | 2018-08-08 | 2019-01-04 | 合肥通用机械研究院有限公司 | A kind of carbon fiber axle axial flow fan blade device of wear resistant corrosion resistant |
| CN110374796A (en) * | 2019-07-29 | 2019-10-25 | 明阳智慧能源集团股份公司 | A kind of wind-driven generator inflatable blade construction |
| CN110439743A (en) * | 2019-09-10 | 2019-11-12 | 上海电气风电集团有限公司 | A kind of novel wind motor subsection blade |
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|---|---|---|---|---|
| CN102734084A (en) * | 2012-06-26 | 2012-10-17 | 昆明理工峰潮科技有限公司 | Sectional blade of wind driven generator |
| CN103629044A (en) * | 2013-12-18 | 2014-03-12 | 中国科学院工程热物理研究所 | Blade root structure of horizontal-axis wind turbine blade |
| US20140334934A1 (en) * | 2011-12-08 | 2014-11-13 | Wobben Properties Gmbh | Rotor blade and connecting device |
| CN104653411A (en) * | 2014-12-24 | 2015-05-27 | 中国科学院工程热物理研究所 | Wind turbine blade with tail edge reinforced prefabricated member |
| CN207393392U (en) * | 2017-10-13 | 2018-05-22 | 中国科学院工程热物理研究所 | A kind of modularization wind turbine blade structure |
-
2017
- 2017-10-13 CN CN201710951822.1A patent/CN107676232B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140334934A1 (en) * | 2011-12-08 | 2014-11-13 | Wobben Properties Gmbh | Rotor blade and connecting device |
| CN102734084A (en) * | 2012-06-26 | 2012-10-17 | 昆明理工峰潮科技有限公司 | Sectional blade of wind driven generator |
| CN103629044A (en) * | 2013-12-18 | 2014-03-12 | 中国科学院工程热物理研究所 | Blade root structure of horizontal-axis wind turbine blade |
| CN104653411A (en) * | 2014-12-24 | 2015-05-27 | 中国科学院工程热物理研究所 | Wind turbine blade with tail edge reinforced prefabricated member |
| CN207393392U (en) * | 2017-10-13 | 2018-05-22 | 中国科学院工程热物理研究所 | A kind of modularization wind turbine blade structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139549A (en) * | 2018-08-08 | 2019-01-04 | 合肥通用机械研究院有限公司 | A kind of carbon fiber axle axial flow fan blade device of wear resistant corrosion resistant |
| CN110374796A (en) * | 2019-07-29 | 2019-10-25 | 明阳智慧能源集团股份公司 | A kind of wind-driven generator inflatable blade construction |
| CN110439743A (en) * | 2019-09-10 | 2019-11-12 | 上海电气风电集团有限公司 | A kind of novel wind motor subsection blade |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107676232B (en) | 2024-03-26 |
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