CN103344463A - Blade embedded test piece of blower fan and manufacturing method thereof - Google Patents
Blade embedded test piece of blower fan and manufacturing method thereof Download PDFInfo
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- CN103344463A CN103344463A CN2013101928910A CN201310192891A CN103344463A CN 103344463 A CN103344463 A CN 103344463A CN 2013101928910 A CN2013101928910 A CN 2013101928910A CN 201310192891 A CN201310192891 A CN 201310192891A CN 103344463 A CN103344463 A CN 103344463A
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Abstract
The invention discloses a blade embedded test piece of a blower fan and a manufacturing method thereof. The test piece comprises embedded bolt sets, fiberglass rods between the embedded bolt sets, an upper overlay of thread sleeve, a lower overlay of thread sleeve and fillers. The method comprises: assembling a mold with four sides, arranging positioning holes on a pair of end surfaces of the mold, laying the lower overlay of thread sleeve in the mold, putting the embedded bolt sets on the lower overlay of thread sleeve, corresponding the embedded bolt sets with the positioning holes, inserting the fiberglass rods between the embedded bolt sets, filling the fillers at angles of the embedded bolt sets and the fiberglass rods, laying the upper overlay of thread sleeve, injecting resin into gaps except inside of the embedded bolt sets, curing to mold, and demolding. The technical scheme of the invention breaks traditions of using such a manufacturing way that the embedded bolts are cut from root end pieces of the blade, but uses a butt joint way for the embedded bolts, thereby overcoming defects existing in traditional test piece form, and preventing insufficiencies that the traditional test pieces are damaged under a non-design state.
Description
Technical field
The present invention relates to the blower fan technical field, particularly relate to pre-buried testpieces of a kind of fan blade and preparation method thereof.
Background technology
In the traditional wind group, blade connected mode commonly used is to adopt the punching technology to connect with bolt, and along with power of fan is more and more big, blade is also towards trend development longer, that blade root load is bigger, and this brings huge challenge for the traditional blades connected mode.
In recent years, this area is tended to do not increasing on the blade root diameter basis gradually, adopts the mode of blade root pre-embedded bolt that blade is installed.Adopt the pre-buried interconnection technique of butt, it is stressed not only can to improve butt, also can save the blade manufacturing cost simultaneously.But ripe not enough about the experimental study of pre-buried swivel nut and fiberglass interface property at present, especially lack relevant experimental test standard and method and instruct.
See also shown in Figure 1ly, traditional experiment method of testing popular on market is: do the butt of 1～2m or long slightly at blade mold, from top cutting sample 3 pre-embedded bolt width or 1 bolt width as the experimental test object.Because blade root has radian, in the pre-buried testpieces test process of fiberglass, not only is subjected to axial tension, and is subjected to extra moment of flexure effect, this will cause testpieces destroyed under off design point.Conventional model 1.5MW is example with market, and the butt pitch circle is 1800mm, and bolt is 54 * M30, and testpieces stress form and design there are differences, and the stressed and both sides swivel nut of middle swivel nut is stressed not on same straight line.In addition, because the fiberglass interlaminar strength is low, cut the traditional approach of pre-embedded bolt down from the blade root extremity piece, the thick line place of arrow indication is prone to lamination in the drawings, thereby causes testpieces to destroy.
This shows that the pre-buried testpieces of above-mentioned traditional blade obviously still has inconvenience and defective on design form and using method, and demands urgently further being improved.
Summary of the invention
An object of the present invention is to provide pre-buried testpieces of a kind of fan blade and preparation method thereof, can overcome the defective that traditional experiment spare form exists, avoid traditional experiment spare ruined deficiency under off design point.
For achieving the above object, the present invention adopts following technical scheme:
The pre-buried testpieces of a kind of fan blade, comprise pre-embedded bolt cover, the glass rod between pre-embedded bolt cover, the swivel nut upper berth layer above pre-embedded bolt cover and the glass rod, the swivel nut lower berth layer below pre-embedded bolt cover and the glass rod and between pre-embedded bolt cover and glass rod, swivel nut upper berth layer, swivel nut lower berth layer the filling material in the space.
As further improvement, the filling material roving between described pre-embedded bolt cover and glass rod, the swivel nut upper berth layer.
Described roving is the filament of glass fiber of number of share of stock 2400TEX, and its length is identical with glass rod length.
Filling material is the fiberglass triangular strip between described pre-embedded bolt cover and glass rod, the swivel nut lower berth layer.
Described pre-embedded bolt cover top and the S-shaped composite felt that is wound with in glass rod below.
Described pre-embedded bolt cover is arranged with docking mode, and per two bolt sleeves are coaxial fixing in pairs.
The length of described pre-embedded bolt cover is 130～160mm.
The upper and lower shop of described swivel nut layer is identical with the butt shop layer of blade finished product.
In addition, the present invention also provides the method for making of the pre-buried testpieces of a kind of above-mentioned fan blade, may further comprise the steps: the A. assembling is mould on four sides, and offers pilot hole at a pair of end face of mould; B. in mould, lay described swivel nut lower berth layer; C. described pre-embedded bolt is mounted on the layer of swivel nut lower berth, and makes it corresponding with pilot hole; D. between the pre-embedded bolt cover, insert the glass rod; E. fill in filling material in pre-embedded bolt cover and the angle of glass rod, and lay swivel nut upper berth layer; F. in except other inner spaces of pre-embedded bolt cover, inject resin, curing molding and the demoulding.
As further improvement, described mould is assembled by fastening bolt by the plane of four no radians, and is provided with stiffening plate between four planes.
Described mould is provided with seal groove along the pilot hole inboard, and described step C installs O-ring seals at seal groove earlier, the pre-embedded bolt cover is close to O-ring seal again and is packed in the mould.
Described steps A also is included in the mould surfaces externally and internally and applies release agent.
Described step B is placed on mould on smooth, the heatable platform earlier, carries out subsequent step again.
Among the described step C pre-embedded bolt cover with hand bolt is screwed in pre-embedded bolt overlaps from pilot hole earlier after pilot hole is corresponding, hand-held pre-embedded bolt cover can not be moved and rotate it, behind the hand-tight make-up, clamp the end that the pre-embedded bolt cover is positioned at mould with spanner again, with another spanner bolt is tightened, keep swivel nut not to be moved in the process and rotate, described step F unloads bolt after also being included in the demoulding.
Described step C in pre-embedded bolt cover lower left and lower right difference fixing glass steel triangular strip, is placed on the fiberglass triangular strip on the layer of swivel nut lower berth with the pre-embedded bolt cover earlier again; Filling material in the described step e is roving, fills in the angle, top of pre-embedded bolt cover and glass rod.
Described step D was laying composite felt earlier above pre-embedded bolt cover and vacant bolt lower berth layer before inserting the glass rod.
Resin in the described step F injects by the priming by vacuum mode of bleeding on the following water conservancy diversion.
Curing molding in the described step F adopts the back curing process.
Because adopt technique scheme, the present invention has the following advantages at least:
Technical scheme of the present invention breaks traditions and cuts the production method of pre-embedded bolt down from the blade root extremity piece, adopts the pre-embedded bolt docking mode, can overcome the defective that traditional experiment spare form exists, and avoids easily ruined deficiency under off design point of traditional experiment spare.
Description of drawings
Above-mentioned only is the general introduction of technical solution of the present invention, and for can clearer understanding technological means of the present invention, the present invention is described in further detail below in conjunction with accompanying drawing and embodiment.
Fig. 1 be the adjacent pre-buried swivel nut of the pre-buried testpieces of conventional fan blade be subjected to the force direction synoptic diagram.
Fig. 2 be the pre-buried testpieces of fan blade of the present invention along with the diagrammatic cross-section of bolt sleeve axis normal direction.
Fig. 3 be the pre-buried testpieces of fan blade of the present invention along with the diagrammatic cross-section of bolt sleeve axis parallel direction.
Fig. 4 is the mould synoptic diagram that the present invention makes the pre-buried testpieces of fan blade.
Fig. 5 is that the present invention makes the synoptic diagram of offering pilot hole on the mould of the pre-buried testpieces of fan blade.
Embodiment
See also shown in Figure 2, the pre-buried testpieces of fan blade of the present invention mainly by pre-embedded bolt cover 1, the glass rod 2 between the pre-embedded bolt cover 1, the swivel nut upper berth layer 5 above pre-embedded bolt cover 1 and the glass rod 2, the swivel nut lower berth layer 6 below pre-embedded bolt cover 1 and the glass rod 2 and between pre-embedded bolt cover 1 and glass rod 2, swivel nut upper berth layer 5, swivel nut lower berth layer 6 filling material in the space.
Wherein, the filling material of filling space between pre-embedded bolt cover 1 and glass rod 2 and the swivel nut upper berth layer 5 can adopt roving 3, the filament of glass fiber of preferred 2400TEX, and its length is identical with glass rod 2 length.The filling material of filling space between pre-embedded bolt cover 1 and glass rod 2 and the swivel nut lower berth layer 6 can adopt fiberglass triangular strip 4.And can be above pre-embedded bolt overlaps 1 with glass rod 2 below the S-shaped composite felt that is wound with.
Please cooperate and consult shown in Figure 3ly, pre-embedded bolt of the present invention cover 1 is arranged in the testpieces with docking mode, and per two bolt sleeves 1 are coaxial fixing in pairs.The treatment process of swivel nut is identical with the parts of blade finished product, dimensionally, and can identical also reduced size with finished product.In view of the cohesive force of fiberglass and pre-embedded bolt cover enough strong, its bonding strength is greater than the ultimate strength of supporting M30 bolt, so testing normally M30 bolt limit destruction of failure mode, in order to reach the bonding force size between checking pre-embedded bolt cover and the fiberglass, can reduce bond length, namely shorten pre-buried swivel nut length, it is between 130～160mm that preferred pre-embedded bolt overlaps 1 length.
Specifically, the method for making of the pre-buried testpieces of fan blade of the present invention may further comprise the steps.
Assembly jig at first.Please cooperate and consult Fig. 4, shown in Figure 5, the present invention produces unnecessary moment of flexure in the manufacturing process, the present invention in manufacturing process by mould.This mould is connected to form by fastening bolt 75 by pair of end first speed plate 71 and pair of side plates 73, and the four sides is for the plane of radian, inner chamber and blade sample, consistent size, and can between termination baffle plate 71 and side plate 73, set up stiffening plate 74 with the enhancing anti-bending strength.
On the termination of mould baffle plate 71, inwardly offer pilot hole 72, and pilot hole cleaned out, can carry out every pair of pre-embedded bolt cover 1 by pilot hole 72 spacing, thereby guarantee its coaxial precision.In addition, also can seal groove be set at pilot hole 72 inwalls, the mould surfaces externally and internally is coated an amount of release agent, be convenient to the later stage demoulding.Mould is placed flatness preferably on the platform, and this platform should have heating function, is convenient to solidify heating behind the resin.
After placing mould, lay the laying of swivel nut lower berth layer 6 in dies cavity, this swivel nut lower berth layer 6 is identical with blade finished product butt shop layer.
The O RunddichtringO is installed in the seal groove of die tip baffle plate 71, the pre-embedded bolt cover 1 that fixes fiberglass triangular strip 4 is close to O-ring seal packs in the mould and makes its positioned in alignment hole 72, with hand bolt is screwed in the pre-embedded bolt cover 1 from die tip baffle plate 71 outsides earlier, hand-held pre-embedded bolt cover 1 can not be moved and rotate it.Behind the hand-tight make-up, clamp the pre-embedded bolt cover away from an end of positioning baffle 1 with spanner again, with another spanner bolt is tightened, keep swivel nut not to be moved and to rotate in the process.Notice that spanner will clean up.
After installing all pre-embedded bolt covers 1 successively, lay composite felt to pre-embedded bolt cover 1 and vacant layer 6 top, bolt lower berth.Afterwards that 2 removing surfaces of glass rod are clean, at the glass rod 2 of filling corresponding size between the pre-embedded bolt cover 1 and between pre-embedded bolt cover 1 and the mould side plate 73.The installation of glass rod 2 should guarantee that its butt is adjacent to termination baffle plate 71, and it is middle to knock in two pre-embedded bolt covers 1 with rubber mallet.The S-shaped parcel of composite felt twines pre-embedded bolt cover 1 and glass rod 2, can play the effect of filling the space and improving interface performance.
Count bundle to pre-embedded bolt cover 1 and the filament of glass fiber of angle, the top plug 2400TEX of glass rod 2 afterwards, the length of filament of glass fiber should be identical with glass rod length, guarantees real the filling and leading up of gap plug of pre-embedded bolt cover 1 and glass rod 2.
Lay swivel nut upper berth layer 5 above pre-embedded bolt cover 1, comprise several layers of enhanced fabrics shop layer, fabric kind, shop number of plies amount are identical with the blade finished product.
The mode of bleeding on the water conservancy diversion under adopting is carried out priming by vacuum pipe installation, guarantee that the inside and outside sealing of pre-embedded bolt cover is good, prevent that resin from infiltrating, the vacuum pressurize can be carried out priming by vacuum after reaching requirement, heat precuring and back curing, the demoulding namely gets the pre-buried testpieces of product fan blade of the present invention after finishing.
Technical scheme of the present invention breaks traditions from blade root extremity piece cutting pre-embedded bolt production method down, adopts the pre-embedded bolt docking mode, can overcome the defective of traditional experiment spare form existence, avoids traditional experiment spare ruined deficiency under off design point.
The above; it only is preferred embodiment of the present invention; be not that the present invention is done any pro forma restriction, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in protection scope of the present invention.
Claims (18)
1. pre-buried testpieces of fan blade, it is characterized in that comprising the pre-embedded bolt cover, the glass rod between the pre-embedded bolt cover, the swivel nut upper berth layer above pre-embedded bolt cover and the glass rod, the swivel nut lower berth layer below pre-embedded bolt cover and the glass rod and between pre-embedded bolt cover and glass rod, swivel nut upper berth layer, swivel nut lower berth layer the filling material in the space.
2. the pre-buried testpieces of fan blade according to claim 1 is characterized in that the filling material roving between described pre-embedded bolt cover and glass rod, the swivel nut upper berth layer.
3. the pre-buried testpieces of fan blade according to claim 2 is characterized in that described roving is the filament of glass fiber of number of share of stock 2400TEX, and its length is identical with glass rod length.
4. the pre-buried testpieces of fan blade according to claim 1 is characterized in that filling material is the fiberglass triangular strip between described pre-embedded bolt cover and glass rod, the swivel nut lower berth layer.
5. the pre-buried testpieces of fan blade according to claim 1 is characterized in that described pre-embedded bolt cover top and the S-shaped composite felt that is wound with in glass rod below.
6. the pre-buried testpieces of fan blade according to claim 1 is characterized in that described pre-embedded bolt cover arranges with docking mode, and per two bolt sleeves are coaxial fixing in pairs.
7. the pre-buried testpieces of fan blade according to claim 1 is characterized in that the length of described pre-embedded bolt cover is 130～160mm.
8. the pre-buried testpieces of fan blade according to claim 1 is characterized in that the upper and lower shop of described swivel nut layer is identical with the butt shop layer of blade finished product.
9. the method for making of the pre-buried testpieces of each described fan blade among the claim 1-8 is characterized in that may further comprise the steps:
A. assemble the four sides mould, and offer pilot hole at a pair of end face of mould;
B. in mould, lay described swivel nut lower berth layer;
C. described pre-embedded bolt is mounted on the layer of swivel nut lower berth, and makes it corresponding with pilot hole;
D. between the pre-embedded bolt cover, insert the glass rod;
E. fill in filling material in pre-embedded bolt cover and the angle of glass rod, and lay swivel nut upper berth layer;
F. in except other inner spaces of pre-embedded bolt cover, inject resin, curing molding and the demoulding.
10. the method for making of the pre-buried testpieces of fan blade according to claim 9 is characterized in that described mould is assembled by fastening bolt by the plane of four no radians, and be provided with stiffening plate between four plane.
11. the method for making of the pre-buried testpieces of fan blade according to claim 9, it is characterized in that described mould is provided with seal groove along the pilot hole inboard, described step C installs O-ring seals at seal groove earlier, the pre-embedded bolt cover is close to O-ring seal again and is packed in the mould.
12. the method for making of the pre-buried testpieces of fan blade according to claim 9 is characterized in that described steps A also is included in the mould surfaces externally and internally and applies release agent.
13. the method for making of the pre-buried testpieces of fan blade according to claim 9 is characterized in that described step B is placed on mould on smooth, the heatable platform earlier, carries out subsequent step again.
14. the method for making of the pre-buried testpieces of fan blade according to claim 9, with hand bolt is screwed in pre-embedded bolt overlaps from pilot hole earlier after it is characterized in that among the described step C pre-embedded bolt cover and pilot hole being corresponding, hand-held pre-embedded bolt cover can not be moved and rotate it, behind the hand-tight make-up, clamp the end that the pre-embedded bolt cover is positioned at mould with spanner again, with another spanner bolt is tightened, keep swivel nut not to be moved in the process and rotate, described step F unloads bolt after also being included in the demoulding.
15. the method for making of the pre-buried testpieces of fan blade according to claim 9, it is characterized in that described step C earlier in pre-embedded bolt cover lower left and lower right difference fixing glass steel triangular strip, is placed on the fiberglass triangular strip on the layer of swivel nut lower berth with the pre-embedded bolt cover again; Filling material in the described step e is roving, fills in the angle, top of pre-embedded bolt cover and glass rod.
16. the method for making of the pre-buried testpieces of fan blade according to claim 9 is characterized in that described step D before inserting the glass rod, was laying composite felt earlier above pre-embedded bolt cover and vacant bolt lower berth layer.
17. the method for making of the pre-buried testpieces of fan blade according to claim 9 is characterized in that the resin in the described step F injects by the priming by vacuum mode of bleeding on the following water conservancy diversion.
18. the method for making of the pre-buried testpieces of fan blade according to claim 9 is characterized in that the curing molding in the described step F adopts the back curing process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101928910A CN103344463A (en) | 2013-05-22 | 2013-05-22 | Blade embedded test piece of blower fan and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101928910A CN103344463A (en) | 2013-05-22 | 2013-05-22 | Blade embedded test piece of blower fan and manufacturing method thereof |
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| CN103344463A true CN103344463A (en) | 2013-10-09 |
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| CN2013101928910A Pending CN103344463A (en) | 2013-05-22 | 2013-05-22 | Blade embedded test piece of blower fan and manufacturing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103817952A (en) * | 2014-02-26 | 2014-05-28 | 国电联合动力技术有限公司 | Manufacturing method of pre-buried bolt sleeve prefabticated members of wind driven generator blade root parts |
| CN104742381A (en) * | 2015-03-31 | 2015-07-01 | 保定华翼风电叶片研究开发有限公司 | Sealing structure and sealing method for end head of wind-power blade embedded bolt sleeve |
| CN107366673A (en) * | 2016-05-11 | 2017-11-21 | 中材科技风电叶片股份有限公司 | Bolt sleeve, blade root built-in fitting and the wind electricity blade production method of wind electricity blade |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061995A (en) * | 2013-01-22 | 2013-04-24 | 重庆通用工业(集团)有限责任公司 | Pre-buried screw processing method for blade roots of Megawatt-level wind turbine generator set |
| CN203324064U (en) * | 2013-05-22 | 2013-12-04 | 国电联合动力技术有限公司 | Embedded testing piece of fan blade |
-
2013
- 2013-05-22 CN CN2013101928910A patent/CN103344463A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061995A (en) * | 2013-01-22 | 2013-04-24 | 重庆通用工业(集团)有限责任公司 | Pre-buried screw processing method for blade roots of Megawatt-level wind turbine generator set |
| CN203324064U (en) * | 2013-05-22 | 2013-12-04 | 国电联合动力技术有限公司 | Embedded testing piece of fan blade |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103817952A (en) * | 2014-02-26 | 2014-05-28 | 国电联合动力技术有限公司 | Manufacturing method of pre-buried bolt sleeve prefabticated members of wind driven generator blade root parts |
| CN104742381A (en) * | 2015-03-31 | 2015-07-01 | 保定华翼风电叶片研究开发有限公司 | Sealing structure and sealing method for end head of wind-power blade embedded bolt sleeve |
| CN107366673A (en) * | 2016-05-11 | 2017-11-21 | 中材科技风电叶片股份有限公司 | Bolt sleeve, blade root built-in fitting and the wind electricity blade production method of wind electricity blade |
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| CB03 | Change of inventor or designer information |
Inventor after: Chu Jingchun Inventor after: Han Xinyue Inventor after: Dai Haitao Inventor after: Zhu Yuliang Inventor after: Feng Yongguo Inventor after: Hu Xuechang Inventor before: Han Xinyue Inventor before: Dai Haitao Inventor before: Zhu Yuliang Inventor before: Feng Yongguo Inventor before: Hu Xuechang |
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Application publication date: 20131009 |
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