CN105269837A - Girder prefabricated part and manufacturing method thereof, and blade and manufacturing method thereof - Google Patents
Girder prefabricated part and manufacturing method thereof, and blade and manufacturing method thereof Download PDFInfo
- Publication number
- CN105269837A CN105269837A CN201510711624.9A CN201510711624A CN105269837A CN 105269837 A CN105269837 A CN 105269837A CN 201510711624 A CN201510711624 A CN 201510711624A CN 105269837 A CN105269837 A CN 105269837A
- Authority
- CN
- China
- Prior art keywords
- prefabricated component
- exterior skin
- crossbeam prefabricated
- crossbeam
- blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 37
- 239000004744 fabric Substances 0.000 claims abstract description 51
- 239000011152 fibreglass Substances 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 29
- 230000015572 biosynthetic process Effects 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 15
- 230000037452 priming Effects 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 5
- 230000010412 perfusion Effects 0.000 claims description 4
- 238000009755 vacuum infusion Methods 0.000 abstract description 4
- 239000003365 glass fiber Substances 0.000 abstract 5
- 238000007666 vacuum forming Methods 0.000 abstract 1
- 239000011347 resin Substances 0.000 description 12
- 229920005989 resin Polymers 0.000 description 12
- 230000000694 effects Effects 0.000 description 3
- 240000007182 Ochroma pyramidale Species 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/36—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and impregnating by casting, e.g. vacuum casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention provides a girder prefabricated part and a manufacturing method thereof, and a blade and a manufacturing method thereof. The girder prefabricated part manufacturing method comprises the following steps: laying glass fiber cloth layers for forming the outer skin layer by layer, wherein the width of the glass fiber cloth layer positioned below is larger than that of the adjacent glass fiber cloth layer positioned above; laying a glass fiber cloth layer for forming a girder prefabricated part main body on a glass fiber cloth layer for forming an outer skin layer by layer; and performing vacuum infusion and forming the girder prefabricated part. The step of laying a continuous felt is omitted, so that the performance of the produced girder prefabricated member is ensured.
Description
Technical field
The present invention relates to wind generator set blade production field, particularly relate to a kind of crossbeam prefabricated component and manufacture method, blade and manufacture method thereof.
Background technology
At present, the blade of a large amount of wind power generating set adopts vacuum infusion molding process for compound to manufacture.As shown in Figure 1 to Figure 3, the structure of blade generally include exterior skin 11 ', the crossbeam prefabricated component 12 ' be arranged on exterior skin 11 ', the core 13 ' be arranged on exterior skin 11 ', inside panel 14 '.In vacuum infusion process, usually crossbeam (Sparcap) is made into prefabricated component, as shown in Figure 4, the laying order of blade shell laying is: continuous felt 15 ', crossbeam and core, inside panel laying below exterior skin laying, crossbeam.Because crossbeam is solid preformulation part, fiberglass cloth below crossbeam is difficult to be infiltrated by resin, need below crossbeam, place continuous felt 15 ' (MAT or CSM), utilize its high permeability, ensure that the fiberglass cloth below crossbeam can fully infiltrate.
But, in actual blade manufacturing process, continuous felt 15 ' is upper easily there is the bubble with white decorative pattern analogous shape on lime-preserved egg, except accidental priming by vacuum gas leakage, main cause be gas in resin itself under vacuum in, discharge gradually, form bubble, and flow on continuous felt 15 ', and continuous felt 15 ' is resin-rich area, be easy to gather the bubble in resin and resin, after resin solidification, bubble is deposited in continuous felt 15 ', forms " bubble " mass defect.In addition, because in continuous felt 15 ', resin content is high, its mechanical performance is lower, due to the existence of continuous felt 15 ', has adverse effect to blade construction.
Summary of the invention
Embodiments of the invention provide a kind of crossbeam prefabricated component and manufacture method, blade and manufacture method thereof, to solve the bad problem of leaf quality.
For achieving the above object, embodiments of the invention provide a kind of crossbeam prefabricated component manufacture method, comprise the steps: successively to lay the fiberglass cloth for the formation of exterior skin, the width being in the fiberglass cloth of below is greater than the width of the fiberglass cloth of adjacent last layer; For the formation of the fiberglass cloth fiberglass cloth of exterior skin successively laid for the formation of crossbeam prefabricated component main body; Carry out priming by vacuum and mold crossbeam prefabricated component.
Further, for the formation of in the fiberglass cloth of exterior skin, the span being in the difference of the width of fiberglass cloth of below and the width of the fiberglass cloth of adjacent last layer is 40mm to 60mm.
Further, carrying out priming by vacuum and molding in the step of crossbeam prefabricated component also comprising the steps: on the fiberglass cloth of crossbeam prefabricated component, lay perfusion auxiliary material; Lay vacuum tube and mozzle on auxiliary material; Lay vacuum coated also seals; Start priming by vacuum, and curing molding.
Further, comprise in the step of laying auxiliary material: lay release cloth, porous release film and flow-guiding screen successively.
According to a further aspect in the invention, provide a kind of crossbeam prefabricated component, crossbeam prefabricated component is by above-mentioned manufacture method manufacture, and crossbeam prefabricated component comprises crossbeam prefabricated component main body and one-body molded exterior skin in crossbeam prefabricated component main body.
According to a further aspect in the invention, provide a kind of blade manufacture method, comprise the steps: to amplify beam prefabricated on mould upper berth, crossbeam prefabricated component is the crossbeam prefabricated component manufactured by above-mentioned manufacture method; Leading edge portion exterior skin successively laid by mould, and the exterior skin of leading edge portion exterior skin and crossbeam prefabricated component successively overlaps, and rear edge part exterior skin successively laid by mould, and the exterior skin of rear edge part exterior skin and crossbeam prefabricated component successively overlaps; Carry out priming by vacuum and shaping.
Further, carrying out priming by vacuum and also comprising before shaping step: on the exterior skin of leading edge portion exterior skin, rear edge part exterior skin and crossbeam prefabricated component, laying core; Lay inside panel.
According to a further aspect in the invention, provide a kind of blade, blade comprises blade shell and crossbeam prefabricated component, and crossbeam prefabricated component is above-mentioned crossbeam prefabricated component, and the exterior skin of crossbeam prefabricated component forms a part for the exterior skin of blade shell.
The crossbeam preform production method of embodiments of the invention by by exterior skin and crossbeam prefabricated component main body one-body molded, decrease the step of placing continuous felt, and then avoid at continuous felt place formation bubble or resin-rich area, ensure that the performance of the crossbeam prefabricated component produced.
Accompanying drawing explanation
Fig. 1 is the sectional view of the blade of wind power generating set in prior art;
Fig. 2 is the partial sectional view of the blade of wind power generating set in prior art;
Fig. 3 is the structural representation of the crossbeam prefabricated component of the blade of wind power generating set in prior art;
Fig. 4 is the partial enlarged drawing of the blade of wind power generating set in prior art;
Fig. 5 is the structural representation of the crossbeam prefabricated component of embodiments of the invention;
Fig. 6 is the partial enlarged drawing of the blade of the wind power generating set of embodiments of the invention.
Description of reference numerals:
12 ', existing crossbeam prefabricated component; 30 ', existing web; 11 ', existing exterior skin; 13 ', existing core; 14 ', existing inside panel; 15 ', existing continuous felt; 11, exterior skin; 12, crossbeam prefabricated component main body; 21, leading edge portion exterior skin;
Detailed description of the invention
Below in conjunction with accompanying drawing, the crossbeam prefabricated component of the embodiment of the present invention and manufacture method, blade and manufacture method thereof are described in detail.
Explanation of nouns:
Inside panel: refer to the fiberglass cloth being positioned at (near blade surface of internal cavity) above crossbeam and core.
Exterior skin: refer to the fiberglass cloth being positioned at (near blade outer surface) below crossbeam and core.
Core: between inside panel and exterior skin, for improving the sandwich material of covering rigidity, is generally PVC material or cork wood material (BALSA).
As shown in Figure 5 and Figure 6, the crossbeam prefabricated component of embodiments of the invention comprise crossbeam prefabricated component main body 12 and with the integrated exterior skin 11 of this crossbeam prefabricated component main body 12.Because exterior skin 11 is one-body molded in crossbeam prefabricated component main body 12, therefore, when carrying out blade shell and producing, without the need to re-laying the laying for the formation of exterior skin in the position of corresponding crossbeam prefabricated component main body 12, also without the need to considering the problem of infiltration, thus can save the continuous felt between crossbeam prefabricated component main body 12 and exterior skin laying, avoid on continuous felt, producing bubble due to the existence of continuous felt, can also prevent continuous felt from affecting the performance of the blade shell produced.
This crossbeam prefabricated component manufacture method comprises the steps:
Successively lay the fiberglass cloth for the formation of exterior skin 11, the width being in the fiberglass cloth of below is greater than the width of the fiberglass cloth of adjacent last layer.Particularly, glass layer laid by the independent mould (the forming surface shape of this mould should be consistent with the corresponding outside wall surface will producing blade) being exclusively used in production crossbeam prefabricated component, this glass layer is generally twin shaft cloth or three axle cloth or both and combines, and it is for the formation of the exterior skin 11 be positioned at below crossbeam prefabricated component main body 12.
The width being in the fiberglass cloth of below is greater than the width of the fiberglass cloth of adjacent last layer, can form overlap edge like this, is more conducive to follow-up use in blade shell is produced.
After the fiberglass cloth for the formation of exterior skin 11 has been laid, successively lay the fiberglass cloth for the formation of crossbeam prefabricated component main body 12 thereon.The fiberglass cloth being generally used for being formed crossbeam prefabricated component main body 12 is but is not limited to single shaft cloth.
After laying completes, carry out priming by vacuum and mold crossbeam prefabricated component.
Adopt above-mentioned steps can produce the one-body molded crossbeam prefabricated component in crossbeam prefabricated component main body 12 of exterior skin 11.Can to solve in prior art due to the crossbeam prefabricated component poor quality that the existence of continuous felt causes thus, affect the problem of blade shell quality.
Preferably, in the fiberglass cloth for the formation of exterior skin 11, the span being in the difference of the width of fiberglass cloth of below and the width of the fiberglass cloth of adjacent last layer is 40mm to 60mm.Can either ensure so effectively can overlap with the other parts of blade shell exterior skin when blade shell is produced, the waste of material can be reduced again.
More preferably, the difference being in the width of fiberglass cloth of below and the width of the fiberglass cloth of adjacent last layer is 40mm, 45mm, 50mm, 55mm or 60mm.
In other embodiments, the span being in the difference of the width of fiberglass cloth of below and the width of the fiberglass cloth of adjacent last layer can be other, such as 30mm to 80mm.
For the ease of the demoulding, and ensure the quality of the crossbeam prefabricated component produced, before laying the fiberglass cloth for the formation of exterior skin 11, also comprise step: cleaning crossbeam prefabricated-member mould, and play releasing agent.
Carry out priming by vacuum and mold in the step of crossbeam prefabricated component comprising the steps:
The fiberglass cloth of crossbeam prefabricated component is laid perfusion auxiliary material.These auxiliary material comprise the release cloth being convenient to the demoulding, the porous release film being convenient to separated demolding cloth and its overlying material and are convenient to resin flows and uniform flow-guiding screen, and three lays successively, to ensure vacuum infusion molding effect.
After having laid auxiliary material, lay vacuum tube and mozzle on auxiliary material, use in order to follow-up priming by vacuum.The paving location of vacuum tube, mozzle and quantity can be determined as required.
Afterwards, lay vacuum coated sealing.Vacuum coated is preferably vacuum bag film, and certainly, it also can be that other can carry out sealing and not affect the shaping overlay film of crossbeam prefabricated component.Afterwards, be connected by vacuum tube with vavuum pump, inserted in resin barrel one end of pitch tube, the other end of pitch tube is connected with mozzle, vacuumizes, and detects air-tightness.
If no problem, then start priming by vacuum, poured into rear wait resin solidification and molded crossbeam prefabricated component, then by crossbeam prefabricated component from the demoulding mould.
After the crossbeam prefabricated component produced, utilizable crossbeam preform production blade.Detailed process is as follows:
The crossbeam prefabricated component produced in said process is put on the mould upper berth for the production of blade.Above-mentioned crossbeam prefabricated component has included a part for blade exterior skin, thus without the need to again producing the exterior skin at corresponding crossbeam prefabricated component place, so without the need to lay continuous felt under crossbeam prefabricated component, avoid the generation of bubble, ensure that the performance of blade.
Leading edge portion exterior skin 21 successively laid by mould, and leading edge portion exterior skin 21 successively overlaps with the exterior skin of crossbeam prefabricated component, and rear edge part exterior skin successively laid by mould, and the exterior skin of rear edge part exterior skin and crossbeam prefabricated component successively overlaps.The exterior skin of blade shell can be divided into leading edge portion exterior skin 21, the exterior skin (also i.e. one-body molded exterior skin in crossbeam prefabricated component main body 12) at corresponding crossbeam prefabricated component place and rear edge part exterior skin.When producing blade, crossbeam prefabricated component is near the side of leading edge, its exterior skin layer and leading edge portion exterior skin successively overlap, because the width of each layer of the exterior skin 11 of crossbeam prefabricated component reduces gradually, thus can ensure that it is connected smooth with leading edge portion exterior skin, can not fold be produced, also can prevent junction from forming resin-rich area, leaf quality can be ensured better.
After laying exterior skin, the exterior skin 11 of leading edge portion exterior skin 21, rear edge part exterior skin and crossbeam prefabricated component lays core, then lay inside panel, root laying (or root prefabricated component).
Carry out conventional vacuum perfusion afterwards and mold blade.
Adopt the blade that said method is produced, its blade comprises blade shell and crossbeam prefabricated component, and because this crossbeam prefabricated component is the crossbeam prefabricated component that said method is produced, therefore the exterior skin 11 of crossbeam prefabricated component forms a part for the exterior skin of blade shell.Owing to eliminating continuous felt, therefore make the better quality of blade.
Crossbeam prefabricated component of the present invention and manufacture method, blade and manufacture method thereof have following effect:
Crossbeam prefabricated component main body and exterior skin one-body molded, do not place continuous felt below crossbeam prefabricated component main body, avoid produce bubble.Adopt the performance of the blade of this kind of crossbeam prefabricated component better.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (8)
1. a crossbeam prefabricated component manufacture method, is characterized in that, comprises the steps:
Successively lay the fiberglass cloth for the formation of exterior skin (11), the width being in the described fiberglass cloth of below is greater than the width of the described fiberglass cloth of adjacent last layer;
Fiberglass cloth for the formation of described exterior skin (11) is successively laid the fiberglass cloth for the formation of crossbeam prefabricated component main body (12);
Carry out priming by vacuum and mold crossbeam prefabricated component.
2. crossbeam prefabricated component manufacture method according to claim 1, it is characterized in that, in fiberglass cloth for the formation of exterior skin (11), the span being in the difference of the width of described fiberglass cloth of below and the width of the described fiberglass cloth of adjacent last layer is 40mm to 60mm.
3. crossbeam prefabricated component manufacture method according to claim 1 and 2, is characterized in that, is carrying out priming by vacuum and molding in the step of crossbeam prefabricated component also comprising the steps:
The fiberglass cloth of described crossbeam prefabricated component lays perfusion auxiliary material;
Lay vacuum tube and mozzle on described auxiliary material;
Lay vacuum coated also seals;
Start priming by vacuum, and curing molding.
4. crossbeam prefabricated component manufacture method according to claim 3, is characterized in that, comprises in the step of laying auxiliary material:
Lay release cloth, porous release film and flow-guiding screen successively.
5. a crossbeam prefabricated component, it is characterized in that, described crossbeam prefabricated component is by the manufacture method manufacture according to any one of Claims 1-4, and described crossbeam prefabricated component comprises crossbeam prefabricated component main body (12) and one-body molded exterior skin (11) on described crossbeam prefabricated component main body (12).
6. a blade manufacture method, is characterized in that, comprises the steps:
Beam prefabricated is amplified, the crossbeam prefabricated component of described crossbeam prefabricated component for being manufactured by the manufacture method according to any one of Claims 1-4 on mould upper berth;
Mould is successively laid leading edge portion exterior skin (21), described leading edge portion exterior skin (21) successively overlaps with the exterior skin of described crossbeam prefabricated component, rear edge part exterior skin successively laid by mould, and the exterior skin of described rear edge part exterior skin and described crossbeam prefabricated component successively overlaps;
Carry out priming by vacuum and shaping.
7. blade manufacture method according to claim 6, is characterized in that, is carrying out priming by vacuum and is also comprising before shaping step:
The exterior skin (11) of described leading edge portion exterior skin (21), described rear edge part exterior skin and described crossbeam prefabricated component lays core;
Lay inside panel.
8. a blade, it is characterized in that, described blade comprises blade shell and crossbeam prefabricated component, and described crossbeam prefabricated component is crossbeam prefabricated component according to claim 5, and the exterior skin (11) of described crossbeam prefabricated component forms a part for the exterior skin of described blade shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510711624.9A CN105269837B (en) | 2015-10-28 | 2015-10-28 | Girder prefabricated part and manufacturing method thereof, and blade and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510711624.9A CN105269837B (en) | 2015-10-28 | 2015-10-28 | Girder prefabricated part and manufacturing method thereof, and blade and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105269837A true CN105269837A (en) | 2016-01-27 |
| CN105269837B CN105269837B (en) | 2017-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510711624.9A Active CN105269837B (en) | 2015-10-28 | 2015-10-28 | Girder prefabricated part and manufacturing method thereof, and blade and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105269837B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107225778A (en) * | 2016-03-23 | 2017-10-03 | 上海艾郎风电科技发展（集团）有限公司 | The forming method of blade girder |
| CN108979951A (en) * | 2018-06-13 | 2018-12-11 | 上伟（江苏）碳纤复合材料有限公司 | A method of wind electricity blade is produced using prefabricated panels |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101539116A (en) * | 2009-01-15 | 2009-09-23 | 南通东泰电工材料有限公司 | Carbon fiber beam for blades of wind-powered generator |
| CN102173059A (en) * | 2011-01-20 | 2011-09-07 | 连云港中复连众复合材料集团有限公司 | Method for locating girder of megawatt-grade wind wheel blade |
| CN103895865A (en) * | 2012-12-25 | 2014-07-02 | 中国直升机设计研究所 | Novel composite material blade tip structure |
| US20140369849A1 (en) * | 2012-03-27 | 2014-12-18 | Senvion Se | Composite fibre component for a rotor blade, device for manufacturing a composite fibre component for a rotor blade and the method for manufacturing a composite fibre component for a rotor blade |
-
2015
- 2015-10-28 CN CN201510711624.9A patent/CN105269837B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101539116A (en) * | 2009-01-15 | 2009-09-23 | 南通东泰电工材料有限公司 | Carbon fiber beam for blades of wind-powered generator |
| CN102173059A (en) * | 2011-01-20 | 2011-09-07 | 连云港中复连众复合材料集团有限公司 | Method for locating girder of megawatt-grade wind wheel blade |
| US20140369849A1 (en) * | 2012-03-27 | 2014-12-18 | Senvion Se | Composite fibre component for a rotor blade, device for manufacturing a composite fibre component for a rotor blade and the method for manufacturing a composite fibre component for a rotor blade |
| CN103895865A (en) * | 2012-12-25 | 2014-07-02 | 中国直升机设计研究所 | Novel composite material blade tip structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107225778A (en) * | 2016-03-23 | 2017-10-03 | 上海艾郎风电科技发展（集团）有限公司 | The forming method of blade girder |
| CN107225778B (en) * | 2016-03-23 | 2019-06-25 | 上海艾郎风电科技发展（集团）有限公司 | The forming method of blade girder |
| CN108979951A (en) * | 2018-06-13 | 2018-12-11 | 上伟（江苏）碳纤复合材料有限公司 | A method of wind electricity blade is produced using prefabricated panels |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105269837B (en) | 2017-08-29 |
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