CN206972436U - Vane change device and the wind power generating set with the vane change device - Google Patents
Vane change device and the wind power generating set with the vane change device Download PDFInfo
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- CN206972436U CN206972436U CN201720936790.3U CN201720936790U CN206972436U CN 206972436 U CN206972436 U CN 206972436U CN 201720936790 U CN201720936790 U CN 201720936790U CN 206972436 U CN206972436 U CN 206972436U
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- 230000037431 insertion Effects 0.000 claims description 18
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- 238000009434 installation Methods 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 6
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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
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model provides a kind of vane change device for wind power generating set and the wind power generating set with the vane change device.The wind power generating set includes wheel hub and blade, the vane change device includes pitch variable bearings, cog belt and the drive mechanism for driving cog belt, the pitch variable bearings include bearing inner race and bearing outer ring, the bearing inner race includes the extension extended axially outwardly, the blade is fixedly connected with the extension, the bearing outer ring is fixedly connected with the wheel hub, and the cog belt is connected on the extension.According to vane change device of the present utility model and wind power generating set, it is possible to increase blade root ultimate bending moment load level, the safety coefficient of vane change device, reduce the failure risk of the failure risk of pitch variable bearings, the failure risk of cog belt and bolt.
Description
Technical field
Technical field of wind power generation is the utility model is related to, more particularly, to a kind of change for wind power generating set
Oar device and the wind power generating set with the vane change device.
Background technology
Wind power generating set is a kind of large-scale TRT that electric energy is converted wind energy into by wheel rotation, wind-power electricity generation
Unit the blade angle of blade is adjusted to control absorption of the impeller to wind energy using vane change device according to the change of wind speed.
Specifically, in wind power generating set during normal operation, when wind speed exceedes the rated wind speed of wind power generating set,
In order to control the power output of wind power generating set, the blade angle of blade is controlled to be protected between 0 °~30 ° by vane change device
The rotating speed of card impeller is limited in rated range, and for example blade feathering is realized to 90 ° of positions by vane change device and is shut down.
Fig. 1 shows a kind of schematic diagram of vane change device of the prior art.Fig. 2 shows the vane change device in Fig. 1
Side elevation in partial section.As illustrated in fig. 1 and 2, vane change device includes pitch variable bearings 2, includes the He of bearing inner race 21 in pitch variable bearings 2
Bearing outer ring 22, the wheel hub 1 as the matrix of wind power generating set pass through in the bearing of wheel hub connecting bolt 7 and pitch variable bearings 2
Circle 21 is fixedly connected, and the blade 6 of wind power generating set is fixed by the bearing outer ring 22 of blade connecting bolt 8 and pitch variable bearings 2
Connection, transmission belt 3 are tensioned the bearing for being connected to pitch variable bearings 2 around drive mechanism 4, tensioning wheel 31 and transmission belt pre-tightening apparatus 32
On the periphery face of cylinder of outer ring 22.When needing become oar operation, drive mechanism 4 drives transmission belt 3, so as to drive pitch axis
Hold 2 bearing outer ring 22 and the blade 6 of wind power generating set bearing inner race 21 and wind power generating set relative to pitch variable bearings 2
Wheel hub 1 rotate, realize the change oar of blade.
However, there is the problem of certain in above-mentioned vane change device.Specifically, in the case of equivalent specifications blade, suffered by blade
Moment of flexure it is identical.Because blade 6 is connected with the bearing outer ring 22 of pitch variable bearings 2 in the prior art, therefore in equivalent specifications leaf
In the case of piece, the size of pitch variable bearings 2 is smaller, and the pitch circle of corresponding pitch variable bearings and wheel hub connecting bolt 7, bearing steel ball is straight
Footpath, transmission belt diameter layout are smaller.Because load is directly proportional to moment of flexure size, it is inversely proportional with pitch diameter, so, moment of flexure phase
With in the case of, the load suffered by load and bolt that steel ball is born is larger.This causes during vane propeller-changing, becomes
Paddle shaft holds 2 and bears larger change oar load.Thus, the bolt being connected with wheel hub 1 of pitch variable bearings 2, ball of pitch variable bearings 2 etc.
By larger load, damage of pitch variable bearings 2 itself and itself component etc. is easily caused.Therefore, change of the prior art
Oar device relatively low pitch variable bearings lasso safety coefficient, pitch variable bearings be present and wheel hub connecting bolt safety coefficient is relatively low, transmission belt
Safety coefficient is relatively low, so as to the problem of easily failing.
Utility model content
In order to solve above-mentioned problem of the prior art, the utility model provides a kind of change oar for wind power generating set and filled
Put and the wind power generating set with the vane change device, the vane change device can improve the peace of all parts of vane change device
Overall coefficient, lift the security performance of vane change device.
According to one side of the present utility model, there is provided a kind of vane change device for wind power generating set, the wind-force hair
Group of motors includes wheel hub and blade, and the vane change device may include pitch variable bearings, actuated element and for driving the transmission
The drive mechanism of element, the pitch variable bearings include bearing inner race and bearing outer ring, and the bearing inner race is included axially outward
The extension of extension, the blade can be fixedly connected with the extension, and the bearing outer ring can be fixedly connected with the wheel hub,
The actuated element may be provided on the extension.
According to one side of the present utility model, the bearing inner race, which can have, to be axially extended and circumferentially disposed
Multiple axially extending bores, multiple axially extending bores can extend across the extension, and bearing inner race connecting bolt passes through the axle
The blade is fastened to after to through hole.
According to one side of the present utility model, the extension may include what is extended axially outwardly from the bearing inner race
Axial continuation and the bulge-structure for being arranged on the axial continuation periphery.
According to one side of the present utility model, the bulge-structure can be formed separately with the axial continuation, described
Bulge-structure is embedded into the periphery of the axial continuation.
According to one side of the present utility model, the bulge-structure may include the insertion projection extended radially inwardly, described
The periphery of axial continuation has corresponding insertion groove.
According to one side of the present utility model, the bulge-structure may include from the axial continuation radially
Radially extending extension and the actuated element installation portion axially extended from the end of the radially extending portion.
According to one side of the present utility model, the bulge-structure can have at least one of following architectural feature：Institute
State in bulge-structure formed with lightening hole；The bulge-structure is annular or partial circle shape；The radius of the bulge-structure
Cross sectional shape on direction is " one " shape, "T"-shaped or " L " shape.
According to one side of the present utility model, the actuated element can be transmission belt, driving-chain or steel cable, and the transmission is first
Part is wrapped on the external peripheral surface of the extension.
According to one side of the present utility model, the transmission belt can be cog belt or silent chain.
, can be formed with tooth-shape structure on the external peripheral surface of the extension according to one side of the present utility model.
According to one side of the present utility model, may be provided with the extension limit actuated element installation site it is recessed
Groove.
According to another aspect of the present utility model, there is provided a kind of wind power generating set, the wind power generating set include
Can vane change device as described above.
According to the vane change device for wind power generating set of embodiment of the present utility model, ensureing that blade specification is identical
In the case of, accordingly increased by pitch variable bearings size used in inner ring terminal pad progress inner ring change oar, the increase of bolt pitch diameter
And bolt quantity increase, actuated element distribution diameter increase, improve the load resistant power of blade root, reduce single bolt institute therewith
The load received, reduce the load suffered by bearing roller.
Therefore, it is curved according to the vane change device raising blade root limit for wind power generating set of embodiment of the present utility model
Square load level, the safety coefficient for improving pitch variable bearings and connecting bolt, the safety coefficient for improving pitch variable bearings inner ring and outer ring
And improve the safety coefficient of actuated element.
Brief description of the drawings
Pass through the description carried out below in conjunction with the accompanying drawings to embodiment, of the present utility model above-mentioned and/or other purposes and excellent
Point will become apparent, wherein：
Fig. 1 shows a kind of schematic diagram of vane change device of the prior art；
Fig. 2 shows the side elevation in partial section of the vane change device in Fig. 1；
Fig. 3 is the stereogram according to the vane change device of the utility model first embodiment；
Fig. 4 is the partial sectional view according to the vane change device of the utility model first embodiment；
Fig. 5 is the stereogram according to the terminal pad of the vane change device of the utility model first embodiment；
Fig. 6 A are the partial sectional views according to the vane change device of the utility model second embodiment；
Fig. 6 B are the plans according to the terminal pad of the vane change device of the utility model second embodiment；
Fig. 6 C are the front sectional view according to the terminal pad of the vane change device of the utility model second embodiment；
Fig. 7 A and 7B are the partial sectional views according to the vane change device of the utility model 3rd embodiment；
Fig. 8 A and 8B are the partial sectional views according to the vane change device of the utility model fourth embodiment；
Fig. 9 A and 9B are the partial sectional views according to the vane change device of the embodiment of the utility model the 5th.
Embodiment
Because the vane change device of prior art connects the bearing outer ring of blade and pitch variable bearings and outer ring is used to become oar side
Case, accordingly, there exist vane change device safety coefficient it is low the problem of.In order to solve the above problems, the utility model proposes using with showing
The outer ring for having technology becomes the different inner ring of oar scheme and becomes oar scheme, connects the bearing inner race of blade and pitch variable bearings, passes through biography
Dynamic element (for example, transmission belt) band movable vane piece and bearing inner race rotate predetermined angular relative to bearing outer ring and wheel hub, realize
Blade rotation becomes oar.Therefore, compared with becoming oar scheme with the outer ring of prior art, in the case of equal blade, i.e., blade root diameter is protected
Hold it is constant in the case of, because blade root is connected with bearing inner race, then the size of bearing inner race and bearing outer ring is required to accordingly
Increase, the diameter of wheel hub adpting flange also accordingly increase, and correspondingly, the pitch diameter of bearing roller, actuated element layout are straight
Footpath, the diameter etc. of connecting bolt can accordingly increase, and so as to improve the safety coefficient of all parts in vane change device, improve
The security performance of vane change device.
For the utility model proposes inner ring become oar scheme, present description provides realize that blade is connected with bearing inner race
And the multiple illustrative embodiments how to be connected with actuated element.It is new that this practicality is described in detail next, with reference to accompanying drawing
Each specific embodiment of type.
First embodiment
Fig. 3 is the stereogram according to the vane change device of first embodiment of the present utility model.Fig. 4 is according to the utility model
First embodiment vane change device partial sectional view.Fig. 5 is the vane change device according to the utility model first embodiment
The stereogram of terminal pad.
As shown in Figure 3 and Figure 4, pitch variable bearings 2, terminal pad are included according to the vane change device of the utility model first embodiment
10th, drive mechanism 4 and actuated element.Pitch variable bearings 2 include bearing inner race 21, bearing outer ring 22 and are arranged on bearing inner race
Rolling element 23 (for example, ball or roller) between 21 and bearing outer ring 22, the bearing outer ring 22 are set in bearing inner race 21
Periphery, and can be rotated relative to bearing inner race 21.Bearing outer ring 22 can be fixed by bearing outer ring connecting bolt 7 and wheel hub 1
Connection, bearing inner race 21 can be fixedly connected by bearing inner race connecting bolt 8 with blade 6.Terminal pad 10 is located at bearing inner race 21
Between blade 6.
The kind of drive between drive mechanism 4 and actuated element can use V belt translation, chain drive, elevator transmission, steel
The modes such as rope drive.Correspondingly, actuated element can be transmission belt, driving-chain, steel cable etc., as long as can transmit drive force to
Blade 6 is so that blade 6 rotates.In the following description, it is described so that actuated element is transmission belt as an example.
In the state of vane change device is installed to wind power generating set, bearing outer ring 22 is fixedly attached to wind power generating set
Wheel hub 1 on, terminal pad 10 is fixedly connected between bearing inner race 21 and blade 6.More specifically, the axial direction first of terminal pad 10
End in contact bearing inner race 21, the blade root end of axially the second end in contact blade 6 of terminal pad 10.In the flange with bearing inner race 21
Position corresponding to through hole is connected, corresponding axially extending bore 14 (will be described in detail hereinafter), axle are provided with terminal pad 10
Hold inner ring connecting bolt 8 and sequentially pass through through hole on through hole and terminal pad 10 on bearing inner race 21, be then screwed to blade 6
In blade root tapped blind hole, after being fastened by clamp nut, bearing inner race 21, terminal pad 10 and blade 6 are fixedly connected on one
Rise.Drive mechanism 4 is arranged on the wheel hub 1 of wind power generating set, and transmission belt 3 is set in terminal pad 10 across drive mechanism 4
Periphery, both ends are by the pretension of pre-tightening apparatus 32 on the external peripheral surface of terminal pad 10.When the blade angle for needing adjustment blade 6
When, drive mechanism 4 is run, and transmission belt 3 drives terminal pad 10, bearing inner race 21 and blade 6 relative under the driving of drive mechanism 4
Predetermined angular is rotated in bearing outer ring 22 and wheel hub 1, so as to realize the change oar of blade 6.
According in embodiment of the present utility model, drive mechanism 4 is made up of pitch drive gear, and vane change device can also wrap
Tensioning wheel 31 is included, transmission belt 3 is stretched on the periphery of terminal pad 10 by tensioning wheel 31 and pitch drive gear 4.
As in Figure 3-5, in embodiment of the present utility model, terminal pad 10 is annulus disk-like structure.For the ease of retouching
State the structure of terminal pad 10, can along radial direction by terminal pad 10 be divided into inner circumferential portion 11, outer circumference 13 and
Connect the central transition section 12 of outer circumference 13 and inner circumferential portion 11.
As shown in figure 5, multiple first axially extending bores 14 are offered in inner circumferential portion 11, multiple edges of first axially extending bore 14
Axially extending and evenly distributed in the circumferential direction.It is provided with bearing inner race 21 corresponding with the plurality of first axially extending bore 14
Multiple second axially extending bores (can be screwed hole), the blade root of blade 6 be provided with corresponding to multiple screwed holes, blade 6
The screwed hole of root can be blind hole.When connecting bearing inner race 21, terminal pad 10 with blade 6, by bearing inner race 21, terminal pad
10 with the coaxial alignment of blade 6, and the screwed hole of three or through hole is accordingly aligned in the axial direction, bearing inner race connecting bolt 8 according to
After the first axially extending bore 14 on secondary the second axially extending bore and terminal pad 10 through bearing inner race 21, wind-power electricity generation is screwed to
In the screwed hole of the blade 6 of unit, then fastened by nut, so as to realize the blade 6 of wind power generating set with becoming
Paddle shaft holds being fixedly connected (as shown in Figures 3 and 4) for 2 bearing inner race 21.
In addition, in embodiment, bearing outer ring 22 is provided with multiple screwed holes or through hole.Pass through bearing outer ring connecting bolt
7 pass through bearing outer ring 22 after be fastened to wind power generating set wheel hub 1 corresponding screwed hole, so as to realize the He of bearing outer ring 22
The wheel hub 1 of wind power generating set is fixedly connected.
Except it is above-mentioned be threaded the mode in hole in the root of blade 6 in addition to, can also the root of blade 6 it is pre-buried one circle
Stud, the stud are peripherally disposed on the root of blade 6.When by blade 6 and terminal pad 10 and bearing inner race 21
During connection, the stud of blade 6 sequentially passes through the first axially extending bore 14 of terminal pad 10 and the second axially extending bore of bearing inner race 21,
Then fastened by nut.
Because transmission belt 3 has certain width, in order to meet the installation requirement of transmission belt 3, terminal pad 10 and transmission belt 3
The surface axial width of the outer circumference 13 of contact is more than or equal to the width of transmission belt 3, therefore the excircle of terminal pad 10
Part 13 may be done thicker；Simultaneously in order to meet to carry out bolted intensity requirement with blade 6 and bearing inner race 21,
The thickness of the inner circumferential portion 11 being connected with bearing inner race connecting bolt 8 of terminal pad 10 may also be larger.
Therefore, cost-effective in order to reduce the weight of terminal pad 10, the outer circumference 13 of terminal pad 10 can be formed as
Non- completely circular structure, for example, inner circumferential portion 11 is completely circular structure, and central transition section 12 and outer circumference 13 are formed as non-
Completely circular structure, but be a part for annulus.Because the change propeller angle of blade 6 is in the actual pitch process of blade 6
Between 0 °~30 °, and the winding angle of transmission belt 3 is not as shown in figure 3, be intertwined and connected in the whole circumference of disk 10, therefore
As long as the structure of terminal pad 10 disclosure satisfy that the winding requirement of transmission belt 3.In the present embodiment, by the periphery of terminal pad 10
Part is designed as non-completely circular structure, can save material cost and mitigate the deadweight of terminal pad 10.Obviously, in actual implementation process
In, terminal pad 10 can also be designed as completely circular structure according to being actually needed.
Further, it is also possible to central transition section 12 is arranged to spoke-like structure, in other words, can be in terminal pad 10
Multiple lightening holes 15 spaced apart are provided with central transition section 12, further to mitigate the deadweight of terminal pad 10.
In addition to the above construction, in the case where meeting installation needs and intensity requirement, central transition section 12 may be used also
To set relatively thin, the axial width of central transition section 12 is set to be less than or equal to the axial width of inner circumferential portion 11, or
Less than or equal to inner circumferential portion 11 and the axial width of outer circumference 13, so as to further mitigate the weight of terminal pad 10.
In this case, inner circumferential portion 11 and outer circumference 13 are generally cylindrical, are intercepted along the radial direction of terminal pad 10
Cross sectional shape can be approximately " work " or Z-shaped.
In the utility model, radial width and axial width equidimension for each several part of terminal pad 10, do not have
Special limitation, as long as in installation process and after installation, terminal pad 10 is connected with bearing outer ring 22 and bearing outer ring
Do not interfered between bolt 7.
, can be in the following way when the vane change device of the present embodiment and wind power generating set are assembled：Pass through first
Bearing outer ring 22 is fixedly connected by bearing outer ring connecting bolt 7 with the wheel hub 1 of wind power generating set, then terminal pad 10 is placed just
Bearing inner race 21, is fixedly connected by position by bearing inner race connecting bolt 8 with the blade 6 of terminal pad 10 and wind power generating set,
So erection sequence can avoid the interference between outer ring connecting bolt 7 and terminal pad 10.
In exemplary embodiment of the present utility model, the periphery of terminal pad 10 is driven with transmission belt 3 by friction.
Therefore, as needed, corresponding antifriction processing can be carried out on the outer circumference surface of terminal pad 10 or increases the processing that rubs, changes and coordinates
Skin-friction coefficient, to meet the transmission requirement of different transmission belts, and avoid occurring what is skidded between transmission belt 3 and terminal pad 10
Risk.
Alternatively, transmission belt 3 can be cog belt or silent chain etc..In the situation that transmission belt 3 is cog belt or silent chain
Under, also tooth-shape structure can be set on the outer circumference surface of terminal pad 10, to coordinate with cog belt or silent chain.
Second embodiment
Fig. 6 A are the partial sectional views according to the vane change device of the utility model second embodiment.Fig. 6 B are according to this practicality
The plan of the terminal pad of the vane change device of new second embodiment.Fig. 6 C are the change oars according to the utility model second embodiment
The front sectional view of the terminal pad of device.
As shown in Figure 6A, terminal pad is also included according to the vane change device of the utility model second embodiment.Fig. 6 B and 6C show
The structural representation of the terminal pad of the vane change device according to the utility model second embodiment is gone out.With the change oar of first embodiment
Unlike device, according to the vane change device of the utility model second embodiment, the set location and structure of terminal pad 40 occur
Change.Except terminal pad 40 and the structure of blade 6, according to the structure and root of the vane change device of the utility model second embodiment
Structure according to the vane change device of first embodiment is identical, therefore, omits the description of same section here, and only describes with first in fact
Apply the different part of example.
As shown in figs. 6b and 6c, in second embodiment of the present utility model, terminal pad 40 or annulus plate-like, and
Including inner circumferential portion 41, outer circumference 43 and the central transition section of connection inner circumferential portion 41 and outer circumference 43
42.The inner circumferential portion 41 of terminal pad 40 is attached to the opening position of the close pitch variable bearings 2 of blade 6.As an example, blade 6
It can be can be plugged on blade root excircle formed with insertion groove, the inner circumferential portion 41 of terminal pad 40 in the insertion groove of blade 6.
In inner circumferential portion 41 can formed with bolt hole, in the insertion groove of inner circumferential portion insertion blade 6 in the case of, Ke Yitong
Inner ring connecting bolt 8 is crossed by the insertion groove of the pre-buried blade root for being connected to blade 6 of terminal pad 40.Transmission belt 3 passes through transmission
It is connected to pre-tightening apparatus on the external peripheral surface of terminal pad 40, so as to which the rotation of driving blade 6 becomes oar.
For the ease of terminal pad 40 is connected on the blade root excircle of blade 6, terminal pad 40 can be formed as multiple arcs
Section, a part for annulus or annulus is spliced into when being installed on blade root.Fig. 6 B show terminal pad 40 by two sectors
Form.The angle of circumference of each sector is less than or equal to 180 degree.For the ease of installing terminal pad 40, it is preferable that terminal pad 40
It can be made up of 3-6 sector.
Radially multiple sectors can be respectively embedded in the insertion groove of the blade root of blade 6.Preferably, terminal pad
40 inner circumferential portion 41 is prolonged in radially inward direction formed with multiple insertion projections 44, the multiple insertion projection 44
Stretch, and be circumferentially evenly arranged.Can be formed with axially extending bore 45, for carrying out bolt with blade 6 in insertion projection 44
Connection.The multiple insertion projection 44 is embedded in and is connected in the insertion groove of blade 6, is fixedly connected by bolt with blade 6.
In a second embodiment, terminal pad 40 and the connected mode of blade 6 are not limited to the mode of diagram, can also use pin
The modes such as connection, wedge shape connection, seam positioning.
With the terminal pad 10 according to the utility model first embodiment similarly, installation needs and intensity requirement are being met
In the case of, the outer circumference 43 of terminal pad 40 can also be not formed as completely circular structure, can also make central transition section 42
Axial width is relatively thin, and in central transition section formed with lightening hole etc..In addition, intercepted along the radial direction of terminal pad 40
Cross sectional shape can be approximately " work " shape, Z-shaped, " L " shape or "T"-shaped.
The shape of terminal pad 40 is not limited to illustrate shape and shape described above, as long as the cylindrical weekly form of terminal pad 40
Face disclosure satisfy that the cooperation demand of transmission belt and installation needs and intensity requirement.
3rd embodiment
Fig. 7 A and Fig. 7 B show the partial sectional view of the vane change device according to the utility model 3rd embodiment.According to
The vane change device of three embodiments also includes terminal pad, still, unlike first embodiment and second embodiment, according to the 3rd
The terminal pad of embodiment is formed with blade 6 and is structure as a whole, i.e. inner circumferential portion is formed with blade root and is structure as a whole.Change sentence
Talk about, bulge-structure 60 can be formed with the outer peripheral face of the blade root of blade 6, it is real instead of first embodiment and second
Apply the terminal pad in example.Certainly, can also be dismountable between bulge-structure 60 and the outer peripheral face of blade root.Transmission belt 3 passes through
Pre-tightening apparatus is connected on the external peripheral surface of the bulge-structure 60, and the direct drive rotation of blade 6 becomes oar.
Bulge-structure 60 may include the radially extending portion extended radially outward from blade root periphery, and transmission belt 3 can twine
It is wound on the external peripheral surface of the radially extending portion.Further, the bulge-structure 60 can also be included from radially
The axial continuation that extension end axially extends, transmission belt 3 can be wrapped in the cylindrical of the axial continuation
In perimeter surface.
It is similar with the terminal pad of first embodiment and second embodiment, the bulge-structure 60 can also be formed as annular or
Partial circle shape, the outer circumference of bulge-structure 60 can also be not formed as completely circular structure, can also be in radial extension
Formed with lightening hole etc..Shape on bulge-structure 60 can be with the connection that is shown in the terminal pad 10 shown in Fig. 5 and Fig. 6 B
The shape of disk 40 is identical or approximate, is not detailed herein.
As shown in Figure 7 A, can be convex to be formed using blade material identical material is made during blade 6 is made
Play structure 60.Alternatively, as shown in Figure 7 B, the situation for becoming the intensity requirement of oar operation can not be met in the material for making blade 6
Under, other suitable materials processing blade root and bulge-structure 60 can be chosen, so as to meet intensity requirement.
It is not limited to illustrate shape according to the shape of the bulge-structure 60 of the present embodiment, as long as the cylindrical weekly form of bulge-structure 60
Face disclosure satisfy that the cooperation demand of transmission belt., can be to bulge-structure 60 in order to meet the transmission requirement of different transmission belts
Outer circumference surface on carry out corresponding antifriction or increase to rub processing, change the coefficient of friction of matching surface.Alternatively, transmission belt 3 can
Think cog belt or silent chain, therefore, also tooth-shape structure can be set on the outer circumference surface of bulge-structure 60, with cog belt or
Silent chain coordinates.
Fourth embodiment
Fig. 8 A and Fig. 8 B show the partial sectional view of the vane change device according to the utility model fourth embodiment.With basis
Unlike the embodiment of the utility model first and second, terminal pad is eliminated according to the vane change device of fourth embodiment, but
Similar with according to 3rd embodiment of the present utility model, transmission belt 3 is directly connected to the leaf of blade 6 by transmission belt pre-tightening apparatus
Root, so as to which the rotation of driving blade 6 becomes oar.But unlike 3rd embodiment, there is no shape in the blade root periphery of blade 6
Into bulge-structure 60, but transmission belt 3 is directly wound on blade root periphery.
, as shown in Figure 8 B, can be in blade root and transmission in order to further limit the cooperation scope of blade 6 and transmission belt 3
Band mating part opens up fluted 601 or other similar process, so that transmission belt 3 is stably placed in groove 601, prevents from passing
Dynamic band play about 3.
Similarly, blade 6 can use corresponding antifriction with the matching surface of transmission belt 3 or increase the processing that rub, and change is matched somebody with somebody
Close skin-friction coefficient.Alternatively, transmission belt 3 can be cog belt or silent chain, therefore, can also be in the outer of the blade root of blade 6
Tooth-shape structure is set on periphery, to coordinate with cog belt or silent chain.
5th embodiment
Fig. 9 A and 9B show the partial sectional view of the vane change device according to the embodiment of the utility model the 5th.With according to this
Unlike above-described embodiment of utility model, the bearing inner race 21 of pitch variable bearings 2 is axially extended outwardly beyond outside bearing
22 predetermined lengths are enclosed, in other words, bearing inner race 21 is facing axially in the direction of blade 6 formed with extension 210,310, axle
Hold the axially extending bore on inner ring 21 and also extend across extension 210,310, therefore, can pass through bearing inner race connecting bolt 8
Blade 6 is fastened to after bearing inner race 21 and extension 210,310, so as to which blade 6 be fixedly connected with bearing inner race 21.
Transmission belt 3 is connected on the external peripheral surface of extension 210,310 of bearing inner race 21 by pre-tightening apparatus, driving
Bearing inner race 21 rotates, and is rotated by bearing inner race 21 with movable vane piece 6 and becomes oar.
As shown in Figure 9 A, extension 210 can be axially from the definite length extended of bearing inner race 21, and shape is generally
Cylindrical shape.The predetermined length is more than the width of the transmission belt 3., can be to extension 210 in order to coordinate with transmission belt 3
External peripheral surface carry out respective handling, for example, the outer circumference surface is carried out increasing rub or antifriction processing.Alternatively, transmission belt 3 can be with
For cog belt or silent chain, therefore, also tooth-shape structure can be formed on the external peripheral surface, to be nibbled with cog belt or silent chain
Close.
As shown in Figure 9 B, extension 310 is different from the extension 210 in Fig. 9 A, and extension 310 is in prolonging shown in Fig. 9 A
Further comprise bulge-structure on the basis of extending portion 210, further to increase the pitch diameter of transmission belt 3.
As shown in Figure 9 B, extension 310 can include axial continuation 312 and be formed in axial continuation 312
The bulge-structure of periphery.
Bulge-structure may include the radially extending portion 314 extended radially outward, and in this case, transmission belt 3 can
It is wrapped on the external peripheral surface of radially extending portion 314.Further, bulge-structure can also be included from radially extending portion
The actuated element installation portion 316 that 314 end axially extends, transmission belt 3 can be wrapped in the cylindrical of actuated element installation portion 316
In perimeter surface.Bulge-structure can be integrally formed with axial continuation 312, terminal pad that can also be as shown in the second embodiment
40 like that, are formed as single part, are inserted on the periphery of axial continuation 312.For example, radially extending portion 314
Inner circumferential can be raised formed with the insertion extended radially inwardly, and the periphery of axial continuation 312 can be recessed formed with corresponding insertion
Groove, so as to which bulge-structure is combined in a manner of inserting raised and insertion fit depressions with axial continuation 314.With above retouching
The structure of terminal pad 40 in the embodiment stated is similar, and the cross sectional shape of bulge-structure can be " one " shape, " T " or " L " shape.It is convex
Annular or partial circle shape can be formed as by playing structure, can also be formed with lightening hole in radially extending portion 314.
In other words, can be by the way that the terminal pad 10 according to the utility model first embodiment be formed with bearing inner race 21
Integrative-structure obtains the embodiment shown in Fig. 9 B.In other words, the vane change device shown in Fig. 9 B also includes terminal pad 80, the connection
Disk 80 is integrally formed with bearing inner race 21, and the terminal pad 80 includes inner circumferential portion, outer circumference and connection inner circumference portion
Divide the central transition section with outer circumference.Multiple axially extending bores of bearing inner race 21 extend through the inner circumferential portion.
Terminal pad 80 (i.e. extension 310) shown in Fig. 9 B and the terminal pad 10 in previously described embodiment, it is connected
Disk 40, the structure of bulge-structure 60 are similar, and the radial section of terminal pad 80 can be " work " shape or Z-shaped.Vane change device its
His structure is identical with the corresponding component of the variation paddle structure in previously described embodiment, therefore, no longer carries out repeated description.
Although being described respectively to above-mentioned five embodiments with reference to accompanying drawing, come for those skilled in the art
Say it should be understood that the architectural feature described in an example can apply to other embodiment wherein, in each feature
In the case where not colliding with each other, the feature in different embodiments can be mutually combined and form other modification side's embodiments.Example
Such as, in the example shown by Fig. 8 B, groove is opened up on blade root external peripheral surface, to prevent play above and below transmission belt, it is clear that
Which is readily applicable to the parts such as change oar disk or the extension in other embodiment.
Vane change device of the present utility model can apply to wind power generating set, and therefore, the utility model provides one kind
Wind power generating set with above-mentioned vane change device.
According to embodiment of the present utility model for the vane change device of wind power generating set and with the change oar dress
The wind power generating set put, in the case of blade specification identical, by the way that blade is connected on bearing inner race so that used
The sizes of pitch variable bearings accordingly increase, bolt pitch diameter increase and bolt quantity increase, transmission belt distribution diameter increase therewith
Greatly, the load resistant power of blade root is improved, reduces the load suffered by single bolt, reduces the load suffered by bearing roller.
Specifically, the blade root limit is improved according to the vane change device for wind power generating set of embodiment of the present utility model
Bending load is horizontal, improve the safety coefficient of pitch variable bearings and connecting bolt, improve pitch variable bearings inner ring and the safety of outer ring is
Number and the safety coefficient for improving transmission belt, reduce the risk of pitch variable bearings fracture failure and the wind of transmission belt fracture failure
Danger.
What above example of the present utility model was merely exemplary, and the utility model is not limited to this.This area
Technical staff should be appreciated that：In the case where not departing from principle of the present utility model and spirit, these embodiments can be changed
Become, wherein, the scope of the utility model limits in claim and its equivalent.
Claims (12)
1. a kind of vane change device for wind power generating set, the wind power generating set includes wheel hub (1) and blade (6), institute
Stating vane change device includes pitch variable bearings (2), actuated element and the drive mechanism (4) for driving the actuated element, and it is special
Sign is,
The pitch variable bearings (2) include bearing inner race (21) and bearing outer ring (22), and the bearing inner race (21) is included vertically
The extension (210,310) to stretch out, the blade (6) is fixedly connected with the extension (210,310), outside the bearing
Circle (22) is fixedly connected with the wheel hub (1), and the actuated element is arranged on the extension (210,310).
2. vane change device as claimed in claim 1, it is characterised in that the bearing inner race (21), which has, axially extends simultaneously edge
Multiple axially extending bores of circumferential directions, multiple axially extending bores extend through the extension (210,310), in bearing
Circle connecting bolt (8) is fastened to the blade (6) after passing through the axially extending bore.
3. vane change device as claimed in claim 1, it is characterised in that the extension (310) is included from the bearing inner race
(21) axial continuation (312) that extends axially outwardly and it is arranged on the convex of the axial continuation (312) periphery
Play structure.
4. vane change device as claimed in claim 3, it is characterised in that the bulge-structure and the axial continuation
(312) it is formed separately, the bulge-structure is embedded into the periphery of the axial continuation (312).
5. vane change device as claimed in claim 4, it is characterised in that the bulge-structure includes the insertion extended radially inwardly
Projection, the periphery of the axial continuation (312) have corresponding insertion groove.
6. vane change device as claimed in claim 3, it is characterised in that the bulge-structure is included from the axial continuation
(312) radially extending portion (314) that extends radially outward and from the end of the radially extending portion (314) vertically
The actuated element installation portion (316) of extension.
7. vane change device as claimed in claim 3, it is characterised in that the bulge-structure has in following architectural feature extremely
Few one kind：
Formed with lightening hole in the bulge-structure；
The bulge-structure is annular or partial circle shape；
Cross sectional shape on the radial direction of the bulge-structure is " one " shape, "T"-shaped or " L " shape.
8. such as the vane change device any one of claim 1-7, it is characterised in that the actuated element is transmission belt, passed
Dynamic chain or steel cable, the actuated element are wrapped on the external peripheral surface of the extension (210,310).
9. vane change device as claimed in claim 8, it is characterised in that the transmission belt is cog belt or silent chain.
10. vane change device as claimed in claim 9, it is characterised in that on the external peripheral surface of the extension (210,310)
Formed with tooth-shape structure.
11. vane change device as claimed in claim 8, it is characterised in that restriction is provided with the extension (210,310) and is passed
The groove of the installation site of dynamic element.
12. a kind of wind power generating set, it is characterised in that the wind power generating set includes any one of claim 1-11 institute
The vane change device stated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720936790.3U CN206972436U (en) | 2017-07-28 | 2017-07-28 | Vane change device and the wind power generating set with the vane change device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720936790.3U CN206972436U (en) | 2017-07-28 | 2017-07-28 | Vane change device and the wind power generating set with the vane change device |
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| Publication Number | Publication Date |
|---|---|
| CN206972436U true CN206972436U (en) | 2018-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720936790.3U Active CN206972436U (en) | 2017-07-28 | 2017-07-28 | Vane change device and the wind power generating set with the vane change device |
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| Country | Link |
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| CN (1) | CN206972436U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107165777A (en) * | 2017-07-28 | 2017-09-15 | 北京金风科创风电设备有限公司 | Become oar device and have this wind generating set who becomes oar device |
| CN111847231A (en) * | 2020-07-24 | 2020-10-30 | 湘电风能有限公司 | Simple device for improving hoisting and butt joint efficiency of blades of wind generating set |
-
2017
- 2017-07-28 CN CN201720936790.3U patent/CN206972436U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107165777A (en) * | 2017-07-28 | 2017-09-15 | 北京金风科创风电设备有限公司 | Become oar device and have this wind generating set who becomes oar device |
| CN111847231A (en) * | 2020-07-24 | 2020-10-30 | 湘电风能有限公司 | Simple device for improving hoisting and butt joint efficiency of blades of wind generating set |
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