CN104612910A - Assembly method for hub and vanes in wind turbine generator - Google Patents
Assembly method for hub and vanes in wind turbine generator Download PDFInfo
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- CN104612910A CN104612910A CN201510035995.XA CN201510035995A CN104612910A CN 104612910 A CN104612910 A CN 104612910A CN 201510035995 A CN201510035995 A CN 201510035995A CN 104612910 A CN104612910 A CN 104612910A
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- blade
- wheel hub
- group
- vanes
- suspender belt
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- 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
- Y02E10/728—Onshore wind turbines
Abstract
The invention discloses an assembly method for a hub and vanes in a wind turbine generator. The assembly method comprises the steps that 1, an variable pitch bearing of the hub rotates through a ground electric variable pitch mode; 2, hanging bands connected with vane roots and vane tip parts are used for lifting the vanes, and rotation of the vanes is achieved by adjusting the contact faces of the hanging bands and the vanes; 3, by means of the steps 1 and 2, after a mechanical zero graduation of the vanes corresponds to a mechanical zero graduation of the hub, the hub and the vanes are assembled. On the basis of not replacing short tooth-shaped bands, by means of the method of rotating the vanes, the mechanical graduation of the vanes is made to correspond to the mechanical graduation of the variable bearing, so that the vanes are assembled. The method is easy to operate, the phenomenon that due to the fact that the tooth-shaped bands need to be replaced, the quality risk is caused is greatly reduced, and the method is beneficial to the implementation of the lifting line production.
Description
Technical field
The present invention relates to Wind turbines mounting technique field, particularly relate to the group of wheel hub and blade in a kind of Wind turbines to method.
Background technique
Present stage Wind turbines wheel hub and vane group to flow process as shown in Figure 1, the pitch variable bearings of wheel hub becomes oar by ground electric makes the mechanical zero degree of pitch variable bearings corresponding with the mechanical zero degree of blade, completes blade assembling.But owing to being short toothed belt in order to cost-saving installation when wheel hub dispatches from the factory, and short toothed belt can not meet blade mechanism to zero requirement, therefore when carrying out wheel hub and vane group pair at the scene, with reference to shown in accompanying drawing 2, need the short toothed belt (5130mm*180mm) carried by wheel hub to be replaced by long toothed belt (6438mm*180mm) temporarily, long toothed belt adopts the mode of electric variable pitch to rotate pitch variable bearings, complete vane group pair to cater to blade mechanism zero degree, longer toothed belt is replaced by short toothed belt afterwards.The method is consuming time, effort economically, also there is the risk of goods damage in toothed belt Renewal process qualitatively, causes security-hidden trouble to the later stage, and because this group is to complex process in process, safety control also exists very large risk.
In addition, if wheel hub assembly shop directly installs long toothed belt, adopt the flow process of accompanying drawing 3 to complete group to process, eliminate twice replacing of short toothed belt and long toothed belt.Although the method can solve vane group to problem, cost is higher, and as short toothed belt unit of comparing, every platform about increases by 4000 yuan of purchase costs.
As can be seen here, in above-mentioned existing Wind turbines, the group of wheel hub and blade is to method in structure, method and use, obviously still has inconvenience and defect, and is urgently further improved.How to found a kind of not only cost-saving but also to increase work efficiency and in the new Wind turbines of compromise between security, the group of wheel hub and blade, to method, belongs to one of current important research and development problem in fact.
Summary of the invention
The technical problem to be solved in the present invention is to provide the group of wheel hub and blade in a kind of not only cost-saving but also the Wind turbines that can increase work efficiency to method, the group that can complete wheel hub and blade on the basis of short toothed belt is right, thus to overcome in existing Wind turbines wheel hub and vane group to the deficiency of method.
For solving the problems of the technologies described above, the invention provides the group of wheel hub and blade in a kind of Wind turbines to method, described group comprises method:
(1) pitch variable bearings of wheel hub is rotated by ground electric change oar mode;
(2) respectively by the suspender belt be connected with blade root and leaf tip, blade being sling, by regulating the surface of contact of suspender belt and blade, realizing the rotation of blade;
(3), after making the mechanical zero graduation of blade corresponding with the mechanical zero graduation of wheel hub by above-mentioned steps (1) and (2), the group of carrying out wheel hub and blade is right.
As a modification of the present invention, in described step (1), the zero graduation of pitch variable bearings rotates the position to being in 3 o'clock, 2 ~ 3 bolts on the upper side viewed from wheel hub outside to inside direction, and described step (2) Leaf zero graduation rotates to the position from blade root 9 o'clock viewed from direction blade 2 ~ 3 bolts on the upper side.
Further improvement, in described step (2), the suspender belt at blade root place is flat broadband, described flat sling connects to be wound around blade root one mode partly of enclosing, and one end of its flat sling directly hangs on hoist lifting hook, and the other end is hung on hoist lifting hook indirectly by chain block.
Further improvement, the width of described flat sling is greater than 20cm, and described flat sling is positioned at the position of distance blade root edge 1.5m.
Further improvement, in described step (2), the suspender belt at leaf tip place is connected with crane by static pulley.
Further improvement, suspender belt and the trailing edge contacting point at described leaf tip place adopt protector protection.
Further improvement, the pitch variable bearings of described wheel hub adopts short toothed belt to carry out change oar.
Adopt above-mentioned technological scheme, the present invention at least has the following advantages: the present invention, on the basis not changing short toothed belt, makes the mechanical zero degree of blade corresponding with the mechanical zero degree of pitch variable bearings by the method for rotation blade, completes blade assembling.The method is easy and simple to handle, drastically reduce the area the quality risk brought because of complex operation, contributes to the enforcement lifting continuous productive process; And be convenient to group rear blade is supported, effectively prevent stressed to blade of wind speed.
Accompanying drawing explanation
Above-mentioned is only the general introduction of technical solution of the present invention, and in order to better understand technological means of the present invention, below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Fig. 1 is the old process schematic diagram that blade and wheel hub group are right;
Fig. 2 is short toothed belt blade and wheel hub group right schematic flow sheet when being replaced by long toothed belt;
Fig. 3 is directly blade during long toothed belt and the right schematic flow sheet of wheel hub group;
Fig. 4 is directly at short toothed belt lower blade and the right schematic flow sheet of wheel hub group;
Suspender belt location arrangements schematic diagram when Fig. 5 is the lifting of blade root place;
Suspender belt location arrangements schematic diagram when Fig. 6 is the lifting of blade tip place;
When Fig. 7 is blade rotary, trailing edge contacts schematic diagram with suspender belt.
Embodiment
The present invention is with reference to shown in accompanying drawing 4, and wheel hub and vane group are on the basis not changing short toothed belt to method, make the mechanical zero degree of blade corresponding with the mechanical zero degree of pitch variable bearings, complete blade assembling by the method for rotation blade.
The present embodiment for golden wind 2.5MW impeller sets to being described in detail, the toothed belt pressing plate of first short toothed belt rotates to distance Idle wheel 6-7 bolt (comprising surplus distance) by pitch variable bearings, now the zero graduation of pitch variable bearings is in substantially horizontal, viewed from wheel hub outside to inside direction, be namely in the position of a 3 o'clock 2-3 on the upper side bolt; Then rotor blade, blade is rotated about 40 ° from initial factory position cause zero vane scale to turn to the substantially horizontal corresponding with the zero graduation of pitch variable bearings, namely from the position of blade root 9 o'clock 2-3 on the upper side bolt viewed from direction blade, with meet wheel hub and blade complete under short toothed belt condition organize right.
With reference to shown in accompanying drawing 5 to 7, the step that centering material 52.5m blade carries out rotating is as follows:
A) at distance blade 1 root 1.5m place (because middle material blade design is intensity maximum point apart from 0-1.5m position, blade root place, therefore can be used as blade 1 moment of rotation application point), use long 20m, the flat sling 2 of wide 25cm is wound around blade 1 one week Ban, suspender belt 2 two ends are hung on hoist lifting hook 4, wherein, suspender belt 2 one end directly hangs on hoist lifting hook 4, and the other end first connects chain block 3, and then is hung on hoist lifting hook 4 by chain block 3.
B) separately get the both sides that two flat slings 2 connect blade tip place blade rack 7 respectively, the other end of two suspender belts 2 is connected on same steel cable 6, and wire rope 6 is through the static pulley hung on hoist lifting hook.By the effect of static pulley, leaf tip synchronous rotary while blade root rotates can be met.Due in leaf tip synchronous rotary process, wherein a suspender belt 2 can touch trailing edge, adopts trailing edge special protective clothing 5 to protect herein for protection trailing edge is not frayed.
C) by chain block 3, blade 1 is rotated to desired location.
And aforesaid way can obtain theories integration, be 2.26 square metres (in suspender belt 2 width 20cm) at blade root suspender belt 2 with blade 1 area of contact, blade root suspender belt 2 (as nylon rope) and blade 1 static friction coefficient are 0.2, and suspender belt 2 all soaks afterwards and blade 1 static friction coefficient is 0.05-0.1; During lifting blade 1, self moment of torsion of blade 1 is 34KNm (being multiplied by blade root radius 1.2m in the stressed 28.4kN of single suspender belt); When the wind speed of 8m/s, the Maximum Torque around axis of runner blade that blade 1 produces is 33.1kNm, during the blade root suspender belt 2 adopting 20cm wide, safety coefficient is 1.94, and during the blade root suspender belt 2 adopting 25cm wide, safety coefficient is 2.43, and during the blade root suspender belt 2 adopting 30cm wide, safety coefficient is 2.91; When the wind speed of 4m/s, during the blade root suspender belt 2 adopting 20cm wide, safety coefficient is 4.5-5.Therefore, said method is adopted to implement the scheme possible in theory of leaf position adjustment.
To sum up, wheel hub of the present invention and the right method step of vane group comprise:
(1) rotation of wheel hub pitch variable bearings: pitch variable bearings becomes the mode of oar by ground electric, the zero graduation of pitch variable bearings being rotated the position to being in 3 o'clock, 2 ~ 3 bolts on the upper side viewed from wheel hub outside to inside direction, above short toothed belt pressing plate, reserving more than 6 bolt hole positions regulate in order to follow-up electric variable pitch small distance;
(2) rotation of blade:
A) at distance blade 1 root 1.5m place, use long 20m, the flat sling 2 of wide 25cm is wound around a circle half, suspender belt 2 two ends are hung on hoist lifting hook 4, wherein, suspender belt 2 one end directly hangs on hoist lifting hook 4, the other end first connects chain block 3, then hangs on hoist lifting hook 4 by chain block 3;
B) separately get the both sides that two flat slings 2 connect blade tip place blade rack 7 respectively, the other end of two suspender belts 2 is connected on same steel cable 6, and wire rope 6 is through the static pulley hung on hoist lifting hook.By the effect of static pulley, leaf tip synchronous rotary while blade root rotates can be met;
C) make blade 1 rotate about 40 ° from initial factory position by chain block 3, cause blade 1 zero graduation to turn to the substantially horizontal corresponding with the zero graduation of pitch variable bearings, as the position from blade root 9 o'clock viewed from direction blade 2 ~ 3 bolts on the upper side;
(3) after completing above-mentioned steps (), (two), the pitch variable bearings of wheel hub is relative with the blade root of blade 1, by the close fit of ground electric pitch-controlled system and crane, finely tune the zero graduation of pitch variable bearings and blade root, the group completing wheel hub and blade 1 is right again;
(4) group is to after completing, blade 1 is the level of state substantially, leaf tip support 7 side is placed on marine cradle and foam, slowly fall blade tip support 7, blade 1 level is allowed to snap on foam, available bolt taut band is by blade 1 and support combination, prevent blade 1 from tilting, complete 1 group, blade to support, and carry out leaf tip support removing by blade tip position suspender belt mode of slowly loosening, leaf tip support 7 under gravity, can tilt to the right, thus depart from blade 1, then trailing edge special protective clothing 5 is removed, so far, 1 group, blade completes everything goes well with your work.
It is right that the present invention all can organize in the wind speed range of 0 ~ 8m/s, but wind speed is close to paying close attention to during 8m/s in order to avoid hypervelocity group is right.
Vane group of the present invention to method not only Optimal Hoisting technique, and saves time, laborsaving, a large amount of purchase costs and running cost can be saved every year, and for follow-up permanent magnet direct-drive level unit air vane group to have accumulated good technical experience.
The above; it is only preferred embodiment of the present invention; not do any pro forma restriction to the present invention, 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 (7)
1. in Wind turbines, the group of wheel hub and blade, to a method, is characterized in that, described group comprises method:
(1) pitch variable bearings of wheel hub is rotated by ground electric change oar mode;
(2) respectively by the suspender belt be connected with blade root and leaf tip, blade being sling, by regulating the surface of contact of suspender belt and blade, realizing the rotation of blade;
(3), after making the mechanical zero graduation of blade corresponding with the mechanical zero graduation of wheel hub by above-mentioned steps (1) and (2), the group of carrying out wheel hub and blade is right.
2. the group of wheel hub according to claim 1 and blade is to method, it is characterized in that, in described step (1), the zero graduation of pitch variable bearings rotates the position to being in 3 o'clock, 2 ~ 3 bolts on the upper side viewed from wheel hub outside to inside direction, and described step (2) Leaf zero graduation rotates to the position from blade root 9 o'clock viewed from direction blade 2 ~ 3 bolts on the upper side.
3. the group of wheel hub according to claim 1 and blade is to method, it is characterized in that, in described step (2), the suspender belt at blade root place is flat broadband, described flat sling connects to be wound around blade root one mode partly of enclosing, one end of its flat sling directly hangs on hoist lifting hook, and the other end is hung on hoist lifting hook indirectly by chain block.
4. the group of wheel hub according to claim 3 and blade is to method, it is characterized in that, the width of described flat sling is greater than 20cm, and described flat sling is positioned at the position of distance blade root edge 1.5m.
5. the group of wheel hub according to claim 1 and blade is to method, it is characterized in that, in described step (2), the suspender belt at leaf tip place is connected with crane by static pulley.
6. the group of wheel hub according to claim 5 and blade is to method, it is characterized in that, suspender belt and the trailing edge contacting point at described leaf tip place adopt protector protection.
7. the wheel hub according to any one of claim 1 to 6 and the group of blade, to method, is characterized in that, the pitch variable bearings of described wheel hub adopts short toothed belt to carry out change oar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510035995.XA CN104612910A (en) | 2015-01-23 | 2015-01-23 | Assembly method for hub and vanes in wind turbine generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510035995.XA CN104612910A (en) | 2015-01-23 | 2015-01-23 | Assembly method for hub and vanes in wind turbine generator |
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| CN104612910A true CN104612910A (en) | 2015-05-13 |
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| CN201510035995.XA Pending CN104612910A (en) | 2015-01-23 | 2015-01-23 | Assembly method for hub and vanes in wind turbine generator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105649894A (en) * | 2015-12-22 | 2016-06-08 | 南车株洲电力机车研究所有限公司 | Zero adjusting method and device of wind turbine generator blade |
| CN107676229A (en) * | 2017-10-18 | 2018-02-09 | 南京中人能源科技有限公司 | A kind of wind power generating set impeller formal dress method |
| CN111734583A (en) * | 2020-04-30 | 2020-10-02 | 广东水电二局股份有限公司 | Accurate in-place installation method for wind power generation large-elevation impeller |
| CN111963392A (en) * | 2020-07-22 | 2020-11-20 | 明阳智慧能源集团股份公司 | Method for solving zero tooth abrasion of variable pitch bearing of wind generating set |
| CN112211789A (en) * | 2020-10-22 | 2021-01-12 | 华能新能源股份有限公司河北分公司 | Single-blade hoisting method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105649894A (en) * | 2015-12-22 | 2016-06-08 | 南车株洲电力机车研究所有限公司 | Zero adjusting method and device of wind turbine generator blade |
| CN107676229A (en) * | 2017-10-18 | 2018-02-09 | 南京中人能源科技有限公司 | A kind of wind power generating set impeller formal dress method |
| CN111734583A (en) * | 2020-04-30 | 2020-10-02 | 广东水电二局股份有限公司 | Accurate in-place installation method for wind power generation large-elevation impeller |
| CN111734583B (en) * | 2020-04-30 | 2021-05-07 | 广东水电二局股份有限公司 | Accurate in-place installation method for wind power generation large-elevation impeller |
| CN111963392A (en) * | 2020-07-22 | 2020-11-20 | 明阳智慧能源集团股份公司 | Method for solving zero tooth abrasion of variable pitch bearing of wind generating set |
| CN111963392B (en) * | 2020-07-22 | 2021-12-10 | 明阳智慧能源集团股份公司 | Method for solving zero tooth abrasion of variable pitch bearing of wind generating set |
| CN112211789A (en) * | 2020-10-22 | 2021-01-12 | 华能新能源股份有限公司河北分公司 | Single-blade hoisting method |
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Application publication date: 20150513 |