CN109555824A - It is tensioned transmission device, pitch-controlled system and wind power generating set - Google Patents
It is tensioned transmission device, pitch-controlled system and wind power generating set Download PDFInfo
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- CN109555824A CN109555824A CN201710891722.4A CN201710891722A CN109555824A CN 109555824 A CN109555824 A CN 109555824A CN 201710891722 A CN201710891722 A CN 201710891722A CN 109555824 A CN109555824 A CN 109555824A
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- tensioning
- tensioning wheel
- transmission device
- traction element
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 148
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- 230000001360 synchronised effect Effects 0.000 abstract description 16
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes or chains
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes or chains
- F16H2007/0842—Mounting or support of tensioner
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The present invention provides a kind of tensioning transmission device, pitch-controlled system and wind power generating set.It is tensioned transmission device to be driven by traction element and the cooperation of the second rotary part, tensioning transmission device includes: fixed pedestal；First rotary part, is pivotally connected to fixed pedestal；And first tensioning wheel and the second tensioning wheel, it is respectively supported at the outside of traction element and compresses traction element opposite to each other simultaneously, and the first tensioning wheel and the second tensioning wheel can be under the action of traction elements along desired trajectory synchronous hunting.It can be realized and adjust the stress of traction element during the work time, avoid traction element local pressure from concentrating and cause and jump tooth or local fracture, reduce one or more purposes in the initial pretightening force that traction element needs.
Description
Technical field
The present invention relates to technical field of mechanical transmission more particularly to a kind of tensioning transmission devices, pitch-controlled system and wind-force
Generating set.
Background technique
As the important link in power transmission, the service life and use reliability of transmission device are particularly important.But
It is, generally to ensure that traction element can be fully wrapped in outside rotary part, to need through tensioning apparatus to driving component
Apply tensile force.
Such as in belt drive unit, in order to ensure belt can be fully wrapped in outside two drive pulleys, need
Tensile force is applied to belt by tensioning apparatus, thereby guarantees that belt is sufficiently wrapped in two transmission belts always during the work time
On wheel, is sufficiently engaged with drive pulley, avoid belt that any sliding occurs.However in specific work process, it is located at transmission
The belt of two sides is taken turns often by different pulling force, so local pressure collection can occur in the belt part of the side of driving wheel
In phenomenon then may cause the problem of belt is broken, and then cause once the phenomenon that local pressure concentration occurs in belt
Transmission device failure.
Especially in technical field of wind power generation, the pitch-controlled system of blade, when using transmission device, traction element (example
Such as toothed belt) reliability it is even more most important.Also, in the specific implementation process of pitch-controlled system, it will usually in tractive unit
After part is mounted to rotary part, initial pretightening force is applied to traction element in certain tension range by pre-tightening apparatus.And
For traction element by pre- next, inside configuration can then generate internal stress, once traction element during the work time two sides by
Unbalanced pulling force is then possible to cause fracture, and then transmission device is caused to fail.However in existing scheme, pitch drive system
In only can satisfy the cornerite requirement of traction element, the problems in local pressure collection of traction element can not be adjusted, be easy to cause
Traction element jumps the problem of tooth or local fracture.
Therefore, a kind of new tensioning transmission device, pitch-controlled system and wind power generating set are needed.
Summary of the invention
According to an embodiment of the invention, providing a kind of tensioning transmission device, pitch-controlled system and wind power generating set, energy
Enough realize adjusts the stress of traction element during the work time, avoid traction element local pressure from concentrating and cause jump tooth or
Person's local fracture reduces one or more purposes in the pretightning force that traction element needs.
According to an aspect of an embodiment of the present invention, a kind of tensioning transmission device is provided, tensioning transmission device is by leading
Draw component and the cooperation of the second rotary part is driven, tensioning transmission device includes: fixed pedestal；First rotary part, pivotally connects
It is connected to fixed pedestal；And first tensioning wheel and the second tensioning wheel, it is respectively supported at the first rotary part and the second rotary part
Between traction element outside and compress traction element opposite to each other simultaneously, and the first tensioning wheel and the second tensioning wheel can be
Along desired trajectory synchronous hunting under the action of traction element.
According to an aspect of an embodiment of the present invention, fixed pedestal includes: fixed part, is fixed on outside by connector
Support construction；And extension, projectedly it is arranged on fixed part, and have the first accommodating for receiving the first rotary part empty
Between.
According to an aspect of an embodiment of the present invention, tensioning transmission device further includes tensioning wheel holding member, and tensioning wheel is protected
Hold component and be separately connected the first tensioning wheel and the second tensioning wheel, make to keep constant between the first tensioning wheel and the second tensioning wheel away from
From.
According to an aspect of an embodiment of the present invention, tensioning wheel holding member by desired trajectory be limited to arc track or
Straight path.
According to an aspect of an embodiment of the present invention, tensioning wheel holding member is connected to fixed pedestal.
According to an aspect of an embodiment of the present invention, tensioning wheel holding member includes: coupling part, is rotatably connected at
Fixed pedestal；With
Support section, support section is connect with coupling part and the first tensioning wheel and the second tensioning wheel, and passes through connection
Part is rotated around the rotary shaft of the first rotary part, desired trajectory is limited to the rotary shaft of the first rotary part be
The arc track of the heart alternatively, support section is connect with coupling part and the first tensioning wheel and the second tensioning wheel, and passes through company
Socket part point is moved back and forth along perpendicular to the line direction of the first rotary part and the second rotary part, and desired trajectory is limited to
Straight path along the line direction perpendicular to the first rotary part and the second rotary part.
According to an aspect of an embodiment of the present invention, support section includes the second accommodating sky being connected to the first rotary part
Between, the first tensioning wheel and the second tensioning wheel are supported in the second accommodating space, to pass through the second accommodating space in the first rotating part
What formation can be passed around for traction element between part, the first tensioning wheel and the second tensioning wheel passes around space.
According to an aspect of an embodiment of the present invention, support section includes two plate bodys opposite to each other and being arranged in parallel,
The second accommodating space is formed between two plate bodys, and the first tensioning wheel and the second tensioning wheel are rotatably supported in two respectively
On plate body.
According to an aspect of an embodiment of the present invention, tensioning wheel holding member includes: linking arm, and linking arm passes through it respectively
Opposite both ends are fixedly connected with the first tensioning wheel and the second tensioning wheel；And guide rail, guide rail limit desired trajectory
For the arc track centered on the rotary shaft of the first rotary part or along perpendicular to the first rotary part and the second rotary part
Line direction straight path, and the first tensioning wheel and the second tensioning wheel are slidably connected to guide rail.
According to an aspect of an embodiment of the present invention, tensioning transmission device further includes limiting component, limiting component and tensioning
Holding member cooperation is taken turns, to make the full swing amplitude of the first tensioning wheel of limit and/or the second tensioning wheel.
According to an aspect of an embodiment of the present invention, tensioning transmission device further includes buffer unit, and buffer unit hingedly connects
It is connected between the first tensioning wheel and fixed structure and/or between the second tensioning wheel and fixed structure, to be limited by buffer unit system
The vibration frequency of corresponding first tensioning wheel and/or the second tensioning wheel.
Other side according to an embodiment of the present invention additionally provides a kind of pitch-controlled system, for driving wind-driven generator
The blade of group carries out variable pitch, and blade is rotatably connected to the wheel hub of wind power generating set, pitch-controlled system packet by pitch variable bearings
It includes: driving motor；With above-mentioned tensioning transmission device, wherein the first rotary part is connect with driving motor；Second rotating part
Part, the second rotary part are connect with root of blade；And traction element, traction element is around the first rotary part and the second rotation
Component, and be driven respectively with the first rotary part and the cooperation of the second rotary part.
Other side according to an embodiment of the present invention, fixed pedestal are connected to wheel hub.
Other side according to an embodiment of the present invention, traction element are toothed belt.
Other side according to an embodiment of the present invention, the second rotary part are the pitch variable bearings connecting with root of blade
Outer ring, traction element and outer ring cooperation rotate.
Other side according to an embodiment of the present invention, the second rotary part are the pitch variable bearings connecting with root of blade
Inner ring, inner ring include the circular extent along the axially projecting outer ring in pitch variable bearings of pitch variable bearings, and traction element passes through ring
Shape extension and inner ring cooperation rotate.
Other side according to an embodiment of the present invention, the second rotary part are the transition for the annular connecting with root of blade
Linkage section, traction element are rotated by transition connection section and blade cooperation.
Other side according to an embodiment of the present invention, transition connection section are an integral structure with blade.
Other side according to an embodiment of the present invention, the periphery of transition connection section are provided with annular radially projectingly
Supporting surface, traction element are rotated by supporting surface and blade cooperation.
Another aspect according to an embodiment of the present invention, a kind of wind power generating set, including above-mentioned pitch-controlled system.
To sum up, tensioning transmission device, pitch-controlled system and the wind power generating set of the embodiment of the present invention is tensioned transmission device
It is driven by traction element and the cooperation of the second rotary part, wherein one of the first rotary part and the second rotary part are
Driving wheel is connect with driving mechanism, and another one is driven wheel, is connect with executing agency.First rotary part passes through fixed pedestal
It is rotatably supported.And the first tensioning wheel and the second tensioning wheel are located between the first rotary part and the second rotary part
Traction element on the outside of and compress traction element opposite to each other simultaneously, and the first tensioning wheel and the second tensioning wheel can be in tractive units
It is swung under the action of part along scheduled trajectory synchronization.Thereby, it is possible to adjust the stress of traction element during the work time, from
And reduce the initial pretightening force of traction element needs.Therefore, in the course of work of tensioning transmission device, it can be avoided tractive unit
Part local pressure is concentrated, and causes the problem of traction element fails because jumping tooth or local fracture.And it can be by tractive unit
The cornerite of part is limited in reasonable range, to improve the reliability of tensioning transmission device, guarantees that the variable pitch of pitch-controlled system is accurate
Degree, and increase traction element and be tensioned the service life of rotating device and pitch-controlled system.
Detailed description of the invention
The present invention may be better understood from the description with reference to the accompanying drawing to a specific embodiment of the invention,
In:
By reading detailed description of non-limiting embodiments referring to the drawings, other feature of the invention,
Objects and advantages will become more apparent upon, wherein the same or similar appended drawing reference indicates the same or similar feature.
Fig. 1 is the stationary state structural schematic diagram of tensioning transmission device according to an embodiment of the invention；
Fig. 2 is the working state schematic representation of the tensioning transmission device of Fig. 1；
Fig. 3 is a kind of schematic diagram of state of a specific example of the tensioning transmission device of the structural principle based on Fig. 1；
Fig. 4 is the schematic diagram of another state of tensioning transmission device shown in Fig. 3；
Fig. 5 is the diagrammatic cross-section after cutting along longitudinal direction of tensioning transmission device shown in Fig. 3 and Fig. 4；
Fig. 6 is the diagrammatic cross-section of the part-structure of pitch-controlled system according to an embodiment of the invention；
Fig. 7 is the use state diagram of tensioning transmission device in accordance with another embodiment of the present invention；
Fig. 8 is the use state diagram of the tensioning transmission device of further embodiment according to the present invention；
Fig. 9 is the use state diagram of the tensioning transmission device of another embodiment according to the present invention；
Figure 10 is the use state diagram of the tensioning transmission device of still further embodiment according to the present invention；
Figure 11 is one of the second rotary part and traction element cooperation in pitch-controlled system according to an embodiment of the present invention
The schematic diagram of the section structure of specific example；
It is another that Figure 12 is that the second rotary part and traction element in pitch-controlled system according to an embodiment of the present invention cooperate
The schematic diagram of the section structure of a specific example；
It is another that Figure 13 is that the second rotary part and traction element in pitch-controlled system according to an embodiment of the present invention cooperate
The schematic diagram of the section structure of a specific example.
Wherein:
1- pitch-controlled system；
100- is tensioned transmission device；101- is tensioned transmission device；102- is tensioned transmission device；103- is tensioned transmission device；
104- is tensioned transmission device；105- is tensioned transmission device；
11- fixed pedestal；111- fixed part；111a- installing port；111b- connecting hole；The extension 112-；12- first
Rotary part；121- rolling bearing；122- end cap；The first tensioning wheel of 14-；The second tensioning wheel of 15-；151- rolling bearing；152-
End cap；16- tensioning wheel holding member；The coupling part 161-；162- support section；The first plate body of 162a-；The second plate body of 162b-；
The second accommodating space of 162c-；163- sliding bearing；164- linking arm；165- arc guide slot；166- linear guiding groove；17-
Buffer unit；
20- driving wheel；
30- pitch variable bearings；The outer ring 31-；32- inner ring；321- circular extent；322- gear teeth；
40- wheel hub；
50- root of blade；501- gear teeth；51- transition connection section；511- circular connector；512- supporting surface；513- tooth
The gear teeth；
60- traction element.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below.In following detailed description
In, many details are proposed, in order to provide complete understanding of the present invention.But to those skilled in the art
It will be apparent that the present invention can be implemented in the case where not needing some details in these details.Below to implementation
The description of example is used for the purpose of providing by showing example of the invention and better understanding of the invention.In attached drawing and following
Description in, at least part of known features and technology are not shown, unnecessary fuzzy to avoid causing the present invention；
Also, for clarity, may be exaggerated the size of part-structure.Identical appended drawing reference indicates same or similar knot in figure
Structure, thus the detailed description that them will be omitted.In addition, feature described below, structure or characteristic can be with any suitable
Mode be incorporated in one or more embodiments.
The noun of locality of middle appearance described below is direction shown in figure, is not to tensioning transmission device of the invention
And the specific structure of pitch-controlled system is defined.In the description of the present invention, it is also necessary to explanation, unless otherwise specific
Regulation and restriction, term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to
It is detachably connected, or is integrally connected；It can be directly connected, can also be indirectly connected.For the ordinary skill people of this field
For member, visual concrete condition understands the concrete meaning of above-mentioned term in the present invention.
Tensioning transmission device provided in an embodiment of the present invention, is connected between driving mechanism and executing agency, by driving machine
The power of structure is transferred to executing agency, to drive executing agency to work, and is tensioned transmission device at work, traction therein
The tensile force of component and the cornerite being formed on transmission parts can be controlled in zone of reasonableness always.Therefore can increase
It is tensioned the use reliability of transmission device, and the service life of traction element can be increased.
For a better understanding of the present invention, below with reference to Fig. 1 to Figure 13 tensioning transmission device according to an embodiment of the present invention
And pitch-controlled system is illustrated.
Fig. 1 is the principle schematic diagram of the stationary state of tensioning transmission device 100 according to an embodiment of the invention.
It should be noted that the principle of tensioning transmission device 100 is schematically shown only in Fig. 1, so tensioning transmission device 100
In part-structure have been not shown, and tensioning transmission device 100 is shown in Fig. 1 by traction element 60 and the second rotating part
Part (illustratively, being rotating wheel 20) cooperation is driven and is in original state (namely unstressed state).As shown in Figure 1,
In one embodiment, tensioning transmission device 100 includes: that fixed pedestal 11 (only illustrates the first rotary part 12 in Fig. 1
Fixed pivot, so needing to combine the specific example in Fig. 3), the first rotary part 12, the first tensioning wheel 14 and the second tensioning wheel
15.Traction element 60 around the first rotary part 12 and the second rotary part, and respectively with the first rotary part 12 and second
Rotary part cooperation transmission, wherein one of the first rotary part 12 and the second rotary part are driving wheels, with driving mechanism
Connection, another one is driven wheel, is connect with executing agency.First rotary part 12 is by fixed pedestal 11 by rotatable twelve Earthly Branches
Support.And the first tensioning wheel 14 and the second tensioning wheel 15 are located at the traction between the first rotary part 12 and the second rotary part
The outside of component 60 and compress traction element 60 opposite to each other simultaneously, and the first tensioning wheel 14 and the second tensioning wheel 15 can drawn
It is swung under the action of component 60 along scheduled trajectory synchronization.
Fig. 2 is the principle schematic diagram of the working condition of the tensioning transmission device 100 of Fig. 1.Certain Fig. 2 similarly only shows
It has anticipated out and has been tensioned the theory structure of transmission device 100.Please also refer to Fig. 1 and Fig. 2, when the first rotary part 12 and the second rotation
When component is by the cooperation transmission of traction element 60, traction element 60 is in 12 two sides of the first rotary part respectively by different pulling force
And there is the elastic inconsistent situation in two sides.That is, traction element 60 can rotate angle [alpha] and (dotted line shown in Fig. 2 from initial position
Position) move to forced position (solid line position shown in Fig. 2).At this point, the first tensioning wheel 14 and the second tensioning wheel 15 then can
Along desired trajectory synchronous hunting under the action of traction element 60.Since the first tensioning wheel 14 and the second tensioning wheel 15 can be distinguished
It is that traction element 60 provides pressing force from the two sides of the first rotary part 12, that is to say, that synchronous along desired trajectory by two
Pulling force suffered by 60 pilled-in selvedge side of traction element is transferred to slack list side by the tensioning wheel of swing, therefore can adjust traction element 60
Stress during the work time, to reduce the initial pretightening force of the needs of traction element 60.Therefore, tractive unit can be improved
The force environment of part 60 at work, avoid 60 local pressure of traction element concentrate, and cause traction element 60 occur jump tooth or
Person's local fracture phenomenon.Therefore it can increase the service life of traction element 60.And the cornerite of traction element 60 can be limited
It is scheduled in reasonable range, to improve the reliable transmission of traction element 60.
Fig. 3 is the signal that a kind of state of transmission device 101 is tensioned in a specific example of the structural principle based on Fig. 1
Figure；Fig. 4 is the schematic diagram of another state of tensioning transmission device 101 shown in Fig. 3；Fig. 5 is tensioning shown in Fig. 3 and Fig. 4
The diagrammatic cross-section after cutting along longitudinal direction of transmission device 101；Fig. 6 is the portion of pitch-controlled system 1 according to an embodiment of the invention
The diagrammatic cross-section of separation structure.It should be noted that Fig. 3 to Fig. 5 be based on the above embodiment in tensioning transmission device 100
Structural principle a specific structure example, and Fig. 6 merely illustrates the part-structure of pitch-controlled system 1, and is not shown complete
Structure chart.
It is schematically shown in Fig. 6 and tensioning transmission device 101 is applied in wind-power electricity generation group, matched with pitch variable bearings 30
The example of transmission is closed, is applied in wind power generating set and change so will will illustratively be tensioned transmission device 101 below
It is example that paddle shaft, which holds 30 cooperations transmission, is illustrated to the tensioning transmission device 101 and pitch-controlled system 1 of the present embodiment.But it is logical
Cross reading following embodiment, it is possible to understand that ground, tensioning transmission device 101 as mentioned in the embodiments of the present invention can also be applied to
In other fields, it is connected to the purpose that power transmission is realized between driving mechanism and executing agency.
Pitch-controlled system 1 includes: driving motor (not shown), tensioning transmission device 101, the second rotary part and leads
Draw component 60, wherein the first rotary part 12 in tensioning transmission device 101 is sequentially connected as driving wheel and driving motor,
And the blade (not shown) of the second rotary part and wind power generating set connects and rotates with movable vane piece.In the present embodiment
In, tensioning transmission device 101 includes: fixed pedestal 11, the first rotary part 12, the first tensioning wheel 14, the second tensioning wheel 15
With tensioning wheel holding member 16.
In pitch-controlled system 1, illustratively, in order to realize accurate transmission, the tractive unit being tensioned in transmission device 101
Part 60 is conveyer belt, such as toothed belt, and the first rotary part 12 is the belt wheel cooperated with toothed belt.But need to illustrate
It is that when tensioning transmission device 101 is applied in other field, then traction element 60 can also be conveyer chain or steel wire traction,
Then the first rotary part 12 is and the sprocket wheel or other corresponding rotary parts of conveyer chain cooperation transmission.
In general, the blade of wind power generating set is rotatably connected at wheel hub (not shown) by pitch variable bearings 30,
Pitch variable bearings 30 include outer ring 31 and inner ring 32, and illustratively, in the present embodiment, outer ring 31 is connect with blade, and inner ring 32
It is connect with wheel hub, therefore is tensioned transmission device 101 and needs to cooperate transmission with the outer ring 31 of pitch variable bearings 30, to drive outer ring 31
Band movable vane piece executes variable pitch movement.Illustratively, in the present embodiment, the first rotary part 12 is the belt pulley with axis hole,
With by the axis hole with and driving motor connect retarder transmission connection.
A specific example according to the present invention, fixed pedestal 11 include fixed part 111 and extension 112, wherein
Fixed part 111 can be fixed on external support structure by connector, and fixed part is projectedly arranged in extension 112
On 111, it can be used for receiving the first rotary part 12.It is driven, fixed pedestal 11 can be consolidated in order to cooperate with outer ring 31
Due on wheel hub.In the present embodiment, illustratively, fixed part 111 be disk-like structure, and disk-like structure substantially in
Heart position offers installing port 111a, and the edge of fixed part 111 is provided with multiple connecting hole 111b.And accordingly,
Need to be provided with flanged joint corresponding with fixed part 111 side (not shown) on wheel hub.It can will consolidate as a result,
Determine part 111 to be sleeved on outside the retarder connecting with driving motor along installing port 111a, and using fastener via fixed part
Fixed pedestal 11 is fixed on by the flange hole being arranged on the flanged joint side being arranged on the connecting hole 111b and wheel hub being arranged on 111
Wheel hub.
In the present embodiment, extension 112 is the similar tube-in-tube structure that protrusion is arranged on fixed part 111, that is, is prolonged
Extending portion point 112 has the first accommodating space (not indicating in figure) for receiving the first rotary part 12.Similar tube-in-tube structure
Refer to, in order to enable traction element 60 around the first rotary part 12, the wall portion in space locating for the first rotary part 12 is along the
The circumferential direction of one rotary part 12 cannot be closed, and the first rotary part 12 is circumferentially preset with energy between extension 112
It is enough to pass around space for what traction element 60 passed around.In an alternative embodiment, in order to which the structure for meeting fixed pedestal 11 is strong
Degree, fixed part 111 and extension 112 are an integral structure.First rotary part 12 passes through rolling bearing 121 rotationally
It is arranged in the first accommodating space of extension 112, so that the first rotary part 12 can be rotated around its rotary shaft.It can be with
Understand that ground, the first rotary part 12 can also be rotatably supported in the first accommodating space by sliding bearing.By the first rotation
It can be the first rotary part 12 by end cap 122 after rotation member 12 is mounted in the first accommodating space of extension 112
And the pressing force of the equal offers axial direction of rolling bearing 121.
Certainly, for the specific structure of the fixed part 111 of fixed pedestal 11 and extension 112, implementation of the invention
Example is simultaneously not limited.Fixed part 111 can also be made of other axle beds either frame structure, and extension 112
It can also be the boss of other forms, rotatably support the first rotary part 12 as long as can realize by extension 112
Purpose.
In addition, the structure and function based on the above fixed pedestal 11, it is possible to understand that ground, in other exemplary embodiments
In, fixed pedestal 11 can also be to be made of plate or frame structure, and external support knot can be fixed on by fastener
On structure.Certainly, the first rotary part 12 is also possible to the belt pulley with rotation axis, at this point, the first rotary part 12 then can be with
It is connected on the fixed pedestal 11 being made of plate or frame structure by its rotary shaft using rotatable connection type.
In addition, the embodiment of the present invention for fixed pedestal 11 installation site also without limitation, such as other real
It applies in example, fixed pedestal 11 may be also secured on other fixed structures in addition to wheel hub.Such as it can also be by fixed pedestal
11 are fixed on other supporting tables arranged on the hub or support frame, as long as first can be supported by fixed pedestal 11
Rotary part 12, and the first rotary part 12 is enable to be driven by traction element 60 and the cooperation of outer ring 31, to realize driving leaf
The purpose of piece variable pitch.
Continuing with referring to Fig. 3 to Fig. 6, according to one embodiment of present invention, tensioning transmission device 101 further includes tensioning
Holding member 16 is taken turns, desired trajectory is limited to arc track, and tensioning wheel maintaining part by tensioning wheel holding member 16
Part 16 is separately connected the first tensioning wheel 14 and the second tensioning wheel 15, makes to keep permanent between the first tensioning wheel 14 and the second tensioning wheel 15
Set a distance.
In the present embodiment, illustratively, tensioning wheel holding member 16 includes coupling part 161 and support section 162,
In, coupling part 161 is rotatably connected at fixed pedestal 11.Specifically, coupling part 161 is connected to prolonging for fixed pedestal 11
In extending portion point 112, since extension 112 can be the structure for the similar sleeve mentioned in above-described embodiment, so accordingly,
Coupling part 161 is provided with the installing port (not indicating in figure) being adapted with extension 112.Coupling part 161 as a result,
It is outer (as shown in Figure 5) extension 112 can be rotationally disposed around using sliding bearing 163 by the installing port.As a result,
Coupling part 161 is able to drive support section 162 connected to it and rotates around the rotary shaft of the first rotary part 12.Also
It is to say, above-mentioned desired trajectory is limited to the circular arc centered on the rotary shaft of the first rotary part 12 by tensioning wheel holding member 16
Track.But the rotation center for not limiting tensioning wheel holding member 16 is consistent with the rotating shaft center of the first rotary part 12.
Support section 162 includes the first plate body 162a and the second plate body 162b opposite to each other and being arranged in parallel, the first plate
The second accommodating space 162c, the second accommodating space 162c is formed between body 162a and the second plate body 162b and in fixed pedestal 11
The the first accommodating space connection being arranged in extension 112, that is to say, that the second accommodating space 162c and the first rotary part 12
Connection.First tensioning wheel 14 and the second tensioning wheel 15 are respectively rotatably supported in the second accommodating space 162c, and make first
Distance is kept constant between tensioning wheel 14 and the second tensioning wheel 15.Therefore, the first tensioning wheel 14 and the second tensioning wheel 15 be symmetrically
Positioned at the two sides of the first rotary part 12, so that between the first rotary part 12, the first tensioning wheel 14 and the second tensioning wheel 15
Line is configured triangle.
Illustratively, in the present embodiment, the first tensioning wheel 14 is identical with the connection type of the second tensioning wheel 15, with second
For tensioning wheel 15, as shown in Figure 4 and Figure 5, the axial ends of the second tensioning wheel 15 passes through rolling bearing 151 rotationally respectively
It is supported on the first plate body 162a and the second plate body 162b.Illustratively, rolling bearing 151 may be replaced by sliding bearing.It will
It can be the second tensioning wheel 15 and the axis of rolling by end cap 152 after second tensioning wheel 15 is arranged in the second accommodating space 162c
The pressing force of 151 offers axial direction is provided.It as a result, can be in the first tensioning wheel 14 and the second tensioning wheel by the second accommodating space 162c
What formation can be passed around for traction element 60 (toothed belt) between 15 passes around space.
Traction element 60 can be via the first accommodating space and the second accommodating space 162c respectively from the first tensioning wheel 14 and
It is passed around and mistake between one rotary part 12 and between the second tensioning wheel 15 and the first rotary part 12, and is centered around first simultaneously
The periphery of the outer ring 31 of rotary part 12 and pitch variable bearings 30.So that the first tensioning wheel 14 and the second tensioning wheel 15 are located at
60 outside of traction element between one rotary part 12 and outer ring 31, and traction element 60 is compressed opposite to each other.
In an alternative embodiment, in order to guarantee the structural strength of tensioning wheel holding member 16,161 He of coupling part
Support section 162 is an integral structure.In addition, in other examples, it is possible to understand that ground, the branch of tensioning wheel holding member 16
Support part point 162 can also be made of frame structure, to form the second above-mentioned accommodating space 162c by frame.
Certainly, in other some embodiments, tensioning wheel holding member 16 can also be installed in rotation on fixed base
The part in addition to extension 112 of seat 11, at this point, desired trajectory is then limited to its connection by tensioning wheel holding member 16
The center of part 161 is the arc track of rotation center.Certainly, tensioning wheel holding member 16 may be also secured at except fixed pedestal
In other structures other than 11, as long as can be realized puts the first tensioning wheel 14 and the second tensioning wheel 15 along scheduled arc track
It is dynamic, and traction element 60 is compressed opposite to each other in 60 two sides of traction element.As long as the set-up mode of tensioning wheel holding member 16
It can make the first tensioning wheel 14 and 15 synchronous hunting of the second tensioning wheel and compress traction element 60 opposite to each other, to realize tractive unit
The cornerite of part 60 limits the purpose for guaranteeing the effectively engaged transmission of traction element 60 in the reasonable scope.
In pitch-controlled system 1, driving motor drives the rotation of the first rotary part 12, and is driven via with the first rotary part 12
The traction element 60 of cooperation drives the outer ring 31 of pitch variable bearings 30 to rotate, so that the blade connecting with outer ring 31 be made to be able to carry out change
Paddle movement.During passing through 1 driving blade variable pitch of pitch-controlled system, as shown in fig. 6, when the first rotary part 12 is in driving electricity
When starting under the driving of machine with 60 engagement rotation of traction element, for example, the first rotary part 12 towards rotationally clockwise when
(according to direction of observation shown in fig. 6), since the part for being located at 12 left side of the first rotary part of traction element 60 is first begin to
Outer ring 31 is pulled to rotate.That is, the pulling force that the part that traction element 60 is located at 12 left side of the first rotary part is subject to is greater than
Traction element 60 is located at the pulling force that the part on the right side of the first rotary part 12 is subject to, then at this time traction element 60 in the first rotating part
The two sides of part 12 show pilled-in selvedge and slack list respectively.
Therefore, the first tensioning wheel 14 being pressed on 60 part of traction element in 12 left side of the first rotary part then will receive
Along clockwise direction lift power, meanwhile, the second tensioning wheel 15 can be in company with the first tensioning wheel 14 together along by tensioning wheel maintaining part
The arc track that part 16 limits is along clockwise oscillation.So traction element 60 be located at the right side of the first rotary part 12 slack list this
When will receive the second tensioning wheel 15 swing and provide pressing force along clockwise direction, finally can be by 60 pilled-in selvedge of traction element
The pulling force being subject to is transferred to slack list side.
As a result, by the first tensioning wheel 14 and the second tensioning wheel 15 synchronous hunting under the action of traction element 60, and from
Stress of the dynamic adjustment traction element 60 in 12 two sides of the first rotary part.In this way, can reduce to the first of traction element 60
Begin to pre-tighten force request, therefore the force environment of traction element 60 can be improved, delays the tired of traction element 60 so as to realize
Labor is impaired, reduces the purpose of 60 failure risk of traction element, the service life for increasing traction element 60.And it can be avoided tractive unit
60 local pressure of part concentration is broken, to improve the transmission use reliability of traction element 60.Therefore, it can be improved variable pitch
The use reliability of system 1 and the accuracy of pitch drive, avoid the drive mechanism in pitch-controlled system 1 go wrong influence it is whole
The normal work of a wind power generating set.
In addition, since the rotary shaft that the first tensioning wheel 14 and the second tensioning wheel 15 surround the first rotary part 12 rotates, and
And first the angle formed between tensioning wheel 14 and the second tensioning wheel 15 will not change, it can be ensured that traction element 60
Always there is constant cornerite, therefore the reliable transmission of tensioning transmission device can be effectively improved.
In addition, in an alternative embodiment, 15 amplitude of fluctuation of the first tensioning wheel 14 and/or the second tensioning wheel in order to prevent
Spend it is big and cannot the stress to traction element 60 effectively adjusted, in the tensioning transmission device 101 in above-described embodiment and also
Limiting component (not shown) can be set.Certainly, the embodiment of the present invention for limiting component specific setting position with
And setting structure is not limited, as long as being arranged in the motion path of tensioning wheel holding member 16, can be tensioned to first
The full swing amplitude of wheel 14 and/or the second tensioning wheel 15 carries out the structure of limit processed.
Illustratively, limiting component may include the edge of the fixed part 111 of setting fixed pedestal 11 shown in Fig. 6
And it is located at the stop block of tensioning wheel holding member 16 or so wherein side (according to direction of observation shown in fig. 6).Existed by setting
The stop block of 16 two sides of tensioning wheel holding member, can be in tensioning wheel holding member 16 along the process rotated clockwise and anticlockwise
It is middle that limit processed is carried out to the amplitude of fluctuation of tensioning wheel holding member 16 respectively, therefore can be avoided the first tensioning wheel 14 and the second tensioning
Amplitude of fluctuation under the action of traction element 60 of wheel 15 is excessive, and then guarantees that the first tensioning wheel 14 and the second tensioning wheel 15 are being drawn
In the course of work of component 60 can the stress always to traction element 60 be automatically adjusted, avoid traction element 60 go out current situation
The problems in portion's stress collection.
Fig. 7 is the use state diagram of tensioning transmission device 102 in accordance with another embodiment of the present invention.Such as Fig. 7 institute
Show, in order to make it easy to understand, identical component is using identical in the tensioning transmission device 101 of the present embodiment and above-described embodiment
Label, and the structure having been described above will not be described again.However, it is desirable to which explanation, only illustrates in Fig. 7
The theory structure of tensioning transmission device 102 is gone out, therefore, some components being tensioned in transmission device 102 have been not shown.This reality
Tensioning transmission device 102 in applying includes: 11 (not shown) of fixed pedestal, the first rotary part 12, the first tensioning wheel
14, the second tensioning wheel 15 and tensioning wheel holding member 16.
The difference is that, opening in transmission device 102 is tensioned with the tensioning transmission device 101 in above-described embodiment
Bearing up pulley holding member 16 includes linking arm 164 and arc guide slot 165.Specifically, in the present embodiment, linking arm 164 has
Two opposite ends are respectively fixedly connected with the first tensioning wheel 14 and the second tensioning wheel 15 by two ends, so that first
Position is fixedly held between the first rotary part 12 and driving wheel 20 relative to each other for tensioning wheel 14 and the second tensioning wheel 15
60 outside of traction element, and traction element 60 can be compressed opposite to each other from two sides.
Illustratively, arc guide slot 165 is the arc chute centered on the rotary shaft of the first rotary part 12, by
This, the circle being limited to above-mentioned desired trajectory by arc guide slot 165 centered on the rotary shaft of the first rotary part 12
Arc track.And the first tensioning wheel 14 and the second tensioning wheel 15 are respectively slidably connected to arc guide slot 165, to pass through connection
Arm 164 and the realization of 165 collective effect of arc guide slot make the first tensioning wheel 14 and the second tensioning wheel 15 along scheduled arc track
The purpose of synchronous hunting.
It specifically, can be respectively by the in order to realize above-mentioned purpose jointly by linking arm 164 and arc guide slot 165
One tensioning wheel 14 and the second tensioning wheel 15 are rotatably connected on sliding block, and then will be connected with the first tensioning wheel 14 and second
Two sliding blocks of bearing up pulley 15 are slideably inserted in arc guide slot 165, and linking arm 164 is then respectively fixedly connected at two
Between sliding block.Certain linking arm 164 can be in arc guide slot 165 far from 15 side of the first tensioning wheel 14 and the second tensioning wheel
It is fixedly connected with two sliding blocks, it in this way can be in arc guide slot 165 far from the first tensioning wheel 14 and the second tensioning wheel 15 1
Side is that the first tensioning wheel 14 and the second tensioning wheel 15 provide limit function simultaneously, avoids the first tensioning wheel 14 and the second tensioning wheel 15
It is disengaged with arc guide slot 165.Certainly, the first tensioning wheel 14 and the second tensioning wheel 15 can also pass through other connection types point
It is not connect with linking arm 164 and arc guide slot 165, the embodiment of the present invention is to this and is not limited.In the present embodiment
Tensioning transmission device 102 and above-described embodiment in the advantage having the same of tensioning transmission device 101, so here no longer
It is repeated here.
In addition, eliminating needs to be arranged includes coupling part 161 and support portion by setting linking arm and guide rail
Divide 162 tensioning wheel holding member 16, and tensioning wheel holding member 16 is rotatably connected on fixed pedestal 11
Complicated production process, therefore the structure for being tensioned transmission device 102 and assembly are simply.And can be by the both ends of guide rail
First tensioning wheel 14 and the second tensioning wheel 15 provide stroke limit effect, therefore can be avoided the first tensioning wheel 14 and the second tensioning
The problems in take turns that 15 amplitudes of fluctuation are excessive and 60 stress collection of traction element cannot be efficiently solved, so as to further increase
The service life of traction element 60, while improving the use reliability of tensioning transmission device 102.
Moreover, during arcuately guide rail is slided for the first tensioning wheel 14 and the second tensioning wheel 15, arc guide rail
Road itself can provide certain frictional force for the first tensioning wheel 14 and the second tensioning wheel 15, so can reduce the first tensioning wheel
14 and second tensioning wheel 15 traction element 60 effect under hunting frequency, to better solve 60 local pressure of traction element
The problem of concentrating and being influenced by alternating load and be easy to appear fatigue damage.
In addition, above-mentioned arc guide slot 165 can also be replaced with for the tensioning transmission device 102 of the present embodiment
Other guide rails make the first tensioning wheel 14 and second to realize by other guide rails and the cooperation of linking arm 164
Purpose of the bearing up pulley 15 along scheduled arc track synchronous hunting.In the present embodiment, illustratively, guide rail can also be arc
Desired trajectory can be equally limited to the rotation of the first rotary part 12 by the guide rail (not shown) of shape, the guide rail of arc
Arc track centered on axis.Specifically, in order to which the first tensioning wheel 14 and the second tensioning wheel 15 are slidably connected to guide rail,
It is the sliding rail of swallow-tail form that the first tensioning wheel 14 of direction of guide rail and the surface of the second tensioning wheel 15, which have cross sectional shape, and first
Bearing up pulley 14 and the second tensioning wheel 15 are connected separately with sliding block, and sliding block has and matches with the swallow-tail form sliding rail shape of guide rail
Sliding slot.It as a result, can simultaneously can by the first tensioning wheel 14 and the second tensioning wheel 15 by the clamping engagement between sliding block and guide rail
It is slidably connected on guide rail.And sliding block of the linking arm 164 equally respectively with the first tensioning wheel 14 and the second tensioning wheel 15 is fixed
Connection, so as to keep constant distance between the first tensioning wheel 14 and the second tensioning wheel 15.
In addition, in the tensioning transmission device 102 of the embodiment of the present invention, for the setting position of arc guide slot 165 and guide rail
It sets and is not defined, such as arc guide slot 165 or guide rail can be arranged and be fixed on fixation on plate body, and by the plate body
On pedestal 11, or the plate body is fixed on other fixed structures, if can by arc guide slot 165 or guide rail with
Linking arm 164 cooperates, and realization makes the first tensioning wheel 14 and the second tensioning wheel 15 along scheduled arc track synchronous hunting and opposite
The purpose of ground compression traction element 60.
Fig. 8 is the use state diagram of the tensioning transmission device 103 of further embodiment according to the present invention.For the ease of
Understanding, identical component uses identical label in the tensioning transmission device 101 of the present embodiment and above-described embodiment, and for
The structure having been described above will not be described again.However, it is desirable to which explanation, also only illustrates tensioning in fig. 8 and passes
The theory structure of dynamic device 103, therefore, some components being tensioned in transmission device 103 have been not shown.Tensioning in this implementation passes
Dynamic device 103 includes: 11 (not shown) of fixed pedestal, the first rotary part 12, the first tensioning wheel 14, the second tensioning wheel 15
With tensioning wheel holding member 16.
The difference is that, tensioning transmission device 103 further includes delaying with the tensioning transmission device 101 in above-described embodiment
Component 17 is rushed, to make the vibration frequency of the first tensioning wheel 14 of limit and/or the second tensioning wheel 15 by setting buffer unit 17.Example
Property, in the present embodiment, a buffer part is respectively arranged between the two sides and fixed structure of tensioning wheel holding member 16
Part 17, it is understood that be, between the first tensioning wheel 14 and fixed structure and between the second tensioning wheel 15 and fixed structure
It is respectively arranged with buffer unit 17.
When that will be tensioned in pitch-controlled system of the transmission device 103 applied to wind-driven generator, above-mentioned fixed structure then may be used
To be understood to the wheel hub or other fixed structures arranged on the hub of wind power generating set.And transmission device will be tensioned by working as
103 when being applied to other technical fields, and fixed structure can be any support force that can provide for buffer unit 17 and realize system
The structure of the purpose of 15 vibration frequency of the first tensioning wheel 14 and/or the second tensioning wheel is limited, as long as guaranteeing that buffer unit 17 can not
It is interfered with the movement of corresponding first rotary part 12, the first tensioning wheel 14 and/or the second tensioning wheel 15.
It should be noted that in order to realize the first tensioning wheel 14 and the second tensioning wheel 15 along the synchronous pendulum of predetermined arc track
Dynamic, the needs of buffer unit 17 are hingedly connected in the first tensioning wheel 14 and fixed structure and/or the second tensioning wheel 15 and fix
Between structure.For example, buffer unit 17 can be realized and corresponding first using the connectors such as universal joint or flake bearing
Articulated connection between bearing up pulley 14 and/or the second tensioning wheel 15.
Specifically, buffer unit 17 can be variable using various total lengths and be capable of providing the attachment device of reaction force,
For example, buffer unit 17 can be spring, hydraulic cylinder can be, be also possible to the combination of spring and hydraulic cylinder, that is, buffer
Component 17 may include hydraulic cylinder and/or spring.When buffer unit 17 is using spring, either compressed spring,
Can be extension spring because either compression or stretch can produce reaction force so that the first tensioning wheel 14 and/or
The vibration frequency that second tensioning wheel 15 generates under the action of traction element 60 is effectively controlled, and avoids the first tensioning wheel 14 and
Two tensioning wheels 15 frequently, with overrunning are swung, and cause fatigue damage to traction element 60.
Similarly, when buffer unit 17 is using hydraulic cylinder, the active force of hydraulic oil is either towards piston is made
The overhanging direction of bar is also possible to towards the direction for retracting piston rod.As it can be seen that the structure type of buffer unit 17 can have it is more
Kind.
Herein it should be noted that for include hydraulic cylinder buffer unit 17, how to control in hydraulic cylinder
Technology that is hydraulic that hydraulic cylinder is made to work, being that the those of ordinary skill in hydraulic machinery field is known, therefore disclosed in the present invention
On the basis of scheme, those skilled in the art can make hydraulic cylinder realize the function of buffering connection.For example, can make each hydraulic
Oil cylinder is connected to hydraulic station, and hydraulic main website is connected with controller, the hydraulic of hydraulic station output is controlled by controller, to control
Pressure in hydraulic cylinder, to the first tensioning wheel 14 and/or the second tensioning wheel 15 while the total length variation of hydraulic cylinder
Reaction force is provided, enables the 103 smooth transfer load of tensioning transmission device of the embodiment of the present invention, avoids the first tensioning wheel 14
And/or second tensioning wheel 15 frequently, with overrunning swing and fatigue damage caused to traction element 60.
In addition, the buffer unit between the first tensioning wheel 14 and fixed structure and/or the second tensioning wheel 15 and fixed structure
17 number can be one as shown in Figure 8, or multiple.And multiple buffer parts ought be set between the two parts
The structure of part 17, each buffer unit 17 can also be different.
In other some embodiments, it can also be realized by the other structures other than tensioning wheel holding member 16 by the
One tensioning wheel 14 and the second tensioning wheel 15 are respectively retained the traction element between the first rotary part 12 and the second rotary part
60 outsides, and compress traction element 60 opposite to each other simultaneously, and can be synchronous along arc track under the action of traction element 60
The purpose of swing to this embodiment of the present invention and is not limited.
Fig. 9 is the use state diagram of the tensioning transmission device 104 of another embodiment according to the present invention.For the ease of
Understand, makes in the tensioning transmission device 104 shown in Fig. 9 with identical component in the tensioning transmission device 101 in above-described embodiment
With identical label, the structure being described in detail will not be repeated again.It is passed with the tensioning in above-described embodiment
Unlike dynamic device 101, above-mentioned scheduled track is limited to directly by tensioning transmission device 104 by tensioning wheel holding member 16
Line tracking.
In the present embodiment, tensioning wheel holding member 16 equally includes coupling part 161 and support section 162, wherein even
Socket part point 161 is to be rotatably installed on the gear of fixed pedestal 11, and support section 162 is the tooth connecting with the gear drive
Item, and the first tensioning wheel 14 and the second tensioning wheel 15 are rotatably supported at a side end face of rack gear respectively.Specifically, as
The gear of coupling part 161 has mounting hole, and the extension of fixed pedestal 11 is rotatably installed on by mounting hole
Outside 112, the rotary shaft rotation of the first rotary part 12 can be surrounded.Rack gear as support section 162 is mounted slidably
On fixed pedestal 11, and the first tensioning wheel 14 and the second tensioning wheel 15 is made to keep constant distance each other, by the first tensioning
Wheel 14 and the second tensioning wheel 15 be symmetrically held in positioned at the first rotary part 12 and the second rotary part (i.e. driving wheel 20) it
Between traction element 60 two sides, and towards each other compress traction element 60.
Due to coupling part 161 and support section 162 transmission cooperation restriction effect under, the first tensioning wheel 14 and second
Tensioning wheel 15 can only along perpendicular to the line between the first rotary part 12 and the second rotary part direction move back and forth (that is,
Along direction of observation shown in Fig. 9, rotate the first tensioning wheel 14 and the second tensioning wheel 15 along with the first rotary part 12 and second
The vertical direction of line between component swings).So driving the second rotary part by tensioning transmission device 104
During rotation, when the traction element 60 for being located at 12 two sides of the first rotary part is by different pulling force, and make traction element
When 60 two side tightness positioned at 12 two sides of the first rotary part are inconsistent, 15 meeting of the first tensioning wheel 14 and the second tensioning wheel
The straight path limited under the action of traction element 60 along tensioning wheel holding member 16 is towards traction element 60 by pulling force
Biggish side synchronous hunting.Therefore, pulling force suffered by 60 pilled-in selvedge side of traction element can be transferred to slack list side, thus real
The purpose of the stress condition of existing adjust automatically traction element 60, avoids 60 local pressure of traction element from concentrating, to prevent from drawing
The problem of jumping tooth or local fracture, occurs for component 60.
It should be noted that due to the constant distance between the first tensioning wheel 14 and the second tensioning wheel 15, so logical
It crosses and the first tensioning wheel 14 and the second tensioning wheel 15 is arranged at predefined intervals on support section 162, it can be by tractive unit
The cornerite of part 60 limits in a certain range.That is, can 60 cornerite range of traction element as required, to first
The distance between bearing up pulley 14 and the second tensioning wheel 15 are set, thus can tensioning transmission device 104 the course of work in,
The cornerite of traction element 60 is limited always by the first tensioning wheel 14 along straight path synchronous hunting and the second tensioning wheel 15
In reasonable range.
Figure 10 is the use state diagram of the tensioning transmission device 105 of still further embodiment according to the present invention.In order to
Be easy to understand, in the tensioning transmission device 105 shown in Figure 10 with identical portion in the tensioning transmission device 102 in above-described embodiment
Part uses identical label, and the structure being described in detail will not be repeated again.With in above-described embodiment
Unlike tight transmission device 102, tensioning transmission device 105 is limited above-mentioned scheduled track by tensioning wheel holding member 16
For straight path.
In the present embodiment, tensioning wheel holding member 16 includes linking arm 164 and linear guiding groove 166.Specifically,
In the present embodiment, linking arm 164 has two opposite ends, is respectively fixedly connected with the first tensioning wheel 14 by both ends
With the second tensioning wheel 15 so that position is fixed relative to each other and is symmetrically held in for the first tensioning wheel 14 and the second tensioning wheel 15
60 outside of traction element between first rotary part 12 and driving wheel 20, and traction element can be compressed opposite to each other from two sides
60。
Illustratively, as the linear guiding groove 166 of guide rail, it is constructed perpendicular to 12 He of the first rotary part
The linear sliding slot of line between second rotary part.It as a result, can be by above-mentioned desired trajectory by linear guiding groove 166
Define along the straight path in the vertical direction of line between the first rotary part 12 and the second rotary part.And first
Bearing up pulley 14 and the second tensioning wheel 15 are respectively slidably connected to linear guiding groove 166, to pass through linking arm 164 and linear
166 collective effect of guiding groove, realization make the first tensioning wheel 14 and the second tensioning wheel 15 along scheduled straight path synchronous hunting
Purpose.In addition, for the connection side of the first tensioning wheel 14 and the second tensioning wheel 15 and linking arm 164 and linear guiding groove 166
Formula and the fixed form of linear guiding groove 166 are referred to the correlation in the tensioning transmission device 102 in above-described embodiment
Partial explanation, is not repeated here herein.
Since under the action of linking arm 164 and the cooperation of linear guiding groove 166, the first tensioning wheel 14 and second is tensioned
Wheel 15 can only be moved back and forth along the direction perpendicular to the line between the first rotary part 12 and the second rotary part (i.e. along Figure 10
Shown in direction of observation, make the first tensioning wheel 14 and the second tensioning wheel 15 along with the first rotary part 12 and the second rotary part it
Between the vertical direction of line swing).So driving the rotation of the second rotary part by tensioning transmission device 104
In the process, when the traction element 60 for being located at 12 two sides of the first rotary part is by different pulling force, and it is located at traction element 60
When two side tightness of 12 two sides of the first rotary part are inconsistent, the first tensioning wheel 14 and the second tensioning wheel 15 can drawn
The straight path limited under the action of component 60 along tensioning wheel holding member 16 is towards the biggish by pulling force of traction element 60
Side synchronous hunting.Therefore, pulling force suffered by 60 pilled-in selvedge side of traction element can be transferred to slack list side, to realize automatic
The purpose for adjusting the stress of traction element 60 avoids 60 local pressure of traction element from concentrating, to prevent traction element 60
The problem of jumping tooth or local fracture occurs in transmission process.
It should be noted that due to the constant distance between the first tensioning wheel 14 and the second tensioning wheel 15, so logical
The linking arm 164 for crossing predetermined length connects the first tensioning wheel 14 and the second tensioning wheel 15, can limit the cornerite of traction element 60
Determine in a certain range.That is, can 60 cornerite range of traction element as required, to being connected to the first tensioning wheel 14
And the length of the second linking arm 164 between tensioning wheel 15 is set.Therefore, in the course of work of tensioning transmission device 104
In, it can be by the first tensioning wheel 14 along predetermined straight path synchronous hunting and the second tensioning wheel 15 by traction element 60
Cornerite is limited to always in reasonable range.
The tensioning transmission device 105 of the present embodiment equally can be the first tensioning by the both ends of linear guiding groove 166
Wheel 14 and the second tensioning wheel 15 provide stroke limit effect, therefore can be avoided 15 direction of the first tensioning wheel 14 and the second tensioning wheel
A direction amplitude of fluctuation is excessive and cannot efficiently solve 60 stress of traction element concentration and 60 cornerite range of traction element
The problem of, so as to further increase the service life and reliable transmission of traction element 60, and then improve tensioning transmission dress
Set 102 use reliability.
In addition, illustrate only the first rotary part 12, the first tensioning wheel 14 and second in above-mentioned each embodiment
Tensioning wheel 15 is rotatably arranged in the mode in corresponding support construction by bearing, i.e., is rotationally set by bearing respectively
It sets on fixed pedestal 11 and tensioning wheel holding member 16, but the embodiment of the present invention is not limited to this.Implement in others
Example in, in order to enable the first rotary part 12, the first tensioning wheel 14 and the second tensioning wheel 15 with traction element 60 successfully
Cooperation, can also be fixed at corresponding support for the first rotary part 12, the first tensioning wheel 14 and the second tensioning wheel 15
In structure, and class is rotationally arranged in the first rotary part 12, the first tensioning wheel 14 and 15 periphery of the second tensioning wheel simultaneously
Like the component of hub form.
In addition, in other some embodiments, it can also be real by the other structures other than tensioning wheel holding member 16
The first tensioning wheel 14 and the second tensioning wheel 15 are now respectively retained leading between the first rotary part 12 and the second rotary part
Draw 60 outside of component, and compress traction element 60 opposite to each other simultaneously, and can swing under the action of traction element 60, to this
The embodiment of the present invention is simultaneously not limited.
Figure 11 is one of the second rotary part and the cooperation of traction element 60 in pitch-controlled system according to an embodiment of the present invention
The schematic diagram of the section structure of a specific example；Figure 12 be the second rotary part in pitch-controlled system according to an embodiment of the present invention with
The schematic diagram of the section structure for another specific example that traction element 60 cooperates；Figure 13 is variable pitch system according to an embodiment of the present invention
The schematic diagram of the section structure for another specific example that the second rotary part and traction element 60 in system cooperate.In addition, with
On description according to Fig. 6 to the second rotary part in the pitch-controlled system 1 of the embodiment of the present invention be pitch variable bearings 30
Outer ring 31 the case where be illustrated, below with reference to Figure 11 to Figure 13 to the variable pitch system in other embodiments according to the present invention
The application of system is illustrated, it should be noted that traction element 60 and the second rotary part are merely illustrated into Figure 13 in Figure 11
Mating part structure.
Referring to Figure 11, in an alternative embodiment, the second rotary part in pitch-controlled system is pitch variable bearings 30
Inner ring 32.Specifically, when being inner ring 32 with the second rotary part of traction element 60 (i.e. toothed belt) cooperation transmission, then become
The outer ring 31 that paddle shaft holds 30 is fixedly connected with wheel hub 40, and inner ring 32 is then fixedly connected with root of blade 50.Since tensioning is driven
Device (not shown) is located at blade outboard, so inner ring 32 is needed by being arranged along the axially projecting in outer of pitch variable bearings 30
The circular extent 321 of circle 31 is arranged gear teeth 322 by the outer peripheral surface in circular extent 321 and engages with traction element 60
Cooperation.It can be cooperated as a result, by traction element 60 and the transmission of inner ring 32, realize the purpose of driving blade variable pitch.
Realize that driving blade executes variable pitch movement by such transmission fit system, compared to traction element 60 and variable pitch
The mode that the transmission cooperation driving blade of outer ring 31 of bearing 30 carries out variable pitch then may be used in the case where guaranteeing the identical situation of blade specification
To increase the size of inner ring 32, therefore the pitch diameter and spiral shell for the bolt being connected between pitch variable bearings 30 and blade can be increased
The quantity of bolt, and surround the area of the traction element 60 in 32 periphery of inner ring increases with it, therefore can be improved root of blade 50
Load resistant power, while load suffered by single bolt is reduced, to reduce load suffered by pitch variable bearings 30, Neng Goujin
The use reliability of one step increase pitch-controlled system.
Referring to Figure 12, in another alternative embodiment, the second rotary part in pitch-controlled system is and blade root
The transition connection section 51 for the annular that portion 50 connects.Specifically, when the second rotary part with the cooperation transmission of traction element 60 was
When crossing linkage section 51, then the outer ring 31 of pitch variable bearings 30 is fixedly connected with wheel hub 40, and inner ring 32 then passes through transition connection section 51
It is fixedly connected with root of blade 50.Illustratively, traction element 60 is toothed belt, and transition connection section 51 and blade are integral type
Structure, that is to say, that gear teeth 501 can be directly set in the outer peripheral surface of the root of blade, to pass through gear teeth 501 and traction
The engagement cooperation of component 60 can be driven by traction element 60 and blade cooperation as a result, realize the purpose of driving blade variable pitch.
Realize that driving blade executes variable pitch movement by such transmission fit system, the variable pitch that can be improved blade is accurate
Degree, and gear teeth 501 can be processed while blade is produced, it eliminates and gear teeth is set on pitch variable bearings 30
Complicated processing process, reduces the difficulty of processing of pitch-controlled system, while also reducing the cost of pitch-controlled system.
Referring to Figure 13, in another optional embodiment, the second rotary part in pitch-controlled system is similarly and leaf
Piece root 50 connect annular transition connection section 51, but with applicable cases shown in Figure 12 the difference is that, this implementation
Transition connection section 51 and blade in example are separate structure.Similarly, the outer ring 31 of pitch variable bearings 30 is fixedly connected with wheel hub 40,
And inner ring 32 is then fixedly connected by transition connection section 51 with root of blade 50.Illustratively, traction element 60 is toothed belt.It crosses
The outer surface for crossing linkage section 51 is connected with the supporting surface 512 of annular by circular connector 511, and the outer peripheral surface of supporting surface 512 is set
It is equipped with gear teeth 513, to engage cooperation with traction element 60 by gear teeth 513, traction element 60 and leaf can be passed through as a result,
Piece cooperation transmission, realizes the purpose of driving blade variable pitch.
It realizes that driving blade executes variable pitch movement by such transmission fit system, traction element 60 can be increased in blade
The surround the area of 50 periphery of root, therefore can be improved the load resistant power of root of blade 50., and can be by transition connection section 51
It is made as standard component, is produced in batches, therefore can be improved the production efficiency of pitch-controlled system, and reduces its cost of manufacture.
In addition, according to another embodiment of the invention, additionally providing a kind of wind power generating set comprising above-mentioned implementation
The pitch-controlled system 1 of example, therefore have the advantages that identical as pitch-controlled system, therefore it is not repeated here.
The present invention can realize in other specific forms, without departing from its spirit and essential characteristics.Therefore, current reality
Apply example be all counted as being exemplary rather than in all respects it is limited, the scope of the present invention by appended claims rather than on
Description definition is stated, also, falls into the meaning of claim and whole changes in the range of equivalent to all be included in this
Among the range of invention.Also, the different technologies feature occurred in different embodiments can be combined, to obtain beneficial to effect
Fruit.Those skilled in the art will be understood that and realize revealed on the basis of studying attached drawing, specification and claims
The embodiment of other variations of embodiment.
Claims (20)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710891722.4A CN109555824B (en) | 2017-09-27 | 2017-09-27 | Tensioning drives, pitch systems and wind turbines |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710891722.4A CN109555824B (en) | 2017-09-27 | 2017-09-27 | Tensioning drives, pitch systems and wind turbines |
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| CN109555824A true CN109555824A (en) | 2019-04-02 |
| CN109555824B CN109555824B (en) | 2022-02-25 |
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| CN201710891722.4A Active CN109555824B (en) | 2017-09-27 | 2017-09-27 | Tensioning drives, pitch systems and wind turbines |
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| CN2677652Y (en) * | 2003-11-27 | 2005-02-09 | 新疆金风科技股份有限公司 | Blade feathering device of wind-mill generating set |
| WO2005012765A1 (en) * | 2003-08-01 | 2005-02-10 | Dayco Europe S.R.L. Con Unico Socio | A tensioner for a drive belt of a motor vehicle |
| CN102022495A (en) * | 2009-09-18 | 2011-04-20 | 通用汽车环球科技运作公司 | Drive belt tensioner for motor generator unit |
| CN202370752U (en) * | 2011-12-13 | 2012-08-08 | 北京金风科创风电设备有限公司 | Pitch control device for wind generating set and wind generating set |
| CN103195889A (en) * | 2012-01-06 | 2013-07-10 | 沈阳新松机器人自动化股份有限公司 | Tension-type transmission device |
| WO2016003713A1 (en) * | 2014-06-30 | 2016-01-07 | Google Inc. | Drive mechanisms for use in controlling rotation and twist of a tether |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005012765A1 (en) * | 2003-08-01 | 2005-02-10 | Dayco Europe S.R.L. Con Unico Socio | A tensioner for a drive belt of a motor vehicle |
| CN2677652Y (en) * | 2003-11-27 | 2005-02-09 | 新疆金风科技股份有限公司 | Blade feathering device of wind-mill generating set |
| CN102022495A (en) * | 2009-09-18 | 2011-04-20 | 通用汽车环球科技运作公司 | Drive belt tensioner for motor generator unit |
| CN202370752U (en) * | 2011-12-13 | 2012-08-08 | 北京金风科创风电设备有限公司 | Pitch control device for wind generating set and wind generating set |
| CN103195889A (en) * | 2012-01-06 | 2013-07-10 | 沈阳新松机器人自动化股份有限公司 | Tension-type transmission device |
| WO2016003713A1 (en) * | 2014-06-30 | 2016-01-07 | Google Inc. | Drive mechanisms for use in controlling rotation and twist of a tether |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109555824B (en) | 2022-02-25 |
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Address after: No.107 Shanghai Road, Urumqi Economic and Technological Development Zone, Urumqi City, Xinjiang Uygur Autonomous Region Patentee after: Jinfeng Technology Co.,Ltd. Address before: No.107 Shanghai Road, Urumqi Economic and Technological Development Zone, Urumqi City, Xinjiang Uygur Autonomous Region Patentee before: XINJIANG GOLDWIND SCIENCE & TECHNOLOGY Co.,Ltd. |