CN105593661B - For blade fatigue test have maximize moving mass than resonance generating means and using the resonance generating means method for testing fatigue - Google Patents
For blade fatigue test have maximize moving mass than resonance generating means and using the resonance generating means method for testing fatigue Download PDFInfo
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- CN105593661B CN105593661B CN201480029338.8A CN201480029338A CN105593661B CN 105593661 B CN105593661 B CN 105593661B CN 201480029338 A CN201480029338 A CN 201480029338A CN 105593661 B CN105593661 B CN 105593661B
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Abstract
The present invention for blade fatigue test have maximize moving mass than resonance generating means include that component and counterweight occur for installation component, resonance.The installation component includes department of assembly and interconnecting piece, and the department of assembly is with corresponding installation groove, the interconnecting piece are arranged at the outside of department of assembly and are fastened by fastening member so that department of assembly applies pressure to blade in shape with the outer surface of blade.Component occurs for the resonance：Generate linearly moving actuator；It is arranged at the counterweight frame in the outside of the installation component, the main body of actuator and bar are accommodated in the inner, and has and linear reciprocal movement is carried out with the displacement with the actuator rod in linkage for improving the closed loop shape of the rigidity of structure；And Linear guide, when the position of the actuator rod is changed, the Linear guide guides the linear reciprocal movement of the counterweight frame.The counterweight is installed on two apparent surfaces of the counterweight frame to link with the counterweight frame, and the counterweight can increase along the longitudinal direction of blade or be reduced so that the center of gravity of the movable block when counterweight frame progress linear reciprocal movement can be located in the bar.The method for testing fatigue of resonance generating means of the use of the present invention for blade fatigue test include：The installation component installation steps of installation component are installed on blade, the installation component is an element in the resonance generating means tested for blade fatigue, the installation component includes department of assembly and interconnecting piece, the department of assembly have with the outer surface of blade corresponding installation groove in shape, the connecting portion in the department of assembly outside and fastened by fastening member so that the department of assembly applies pressure to blade；The resonance generation component installation steps of component occur for installation resonance on the side of the installation component, it includes generating linearly moving actuator that component, which occurs, for the resonance, the counterweight frame being arranged on the outside of the installation component, and Linear guide, the counterweight frame accommodates the main body of actuator and bar in the inner, the counterweight frame has the closed loop shape for improving the rigidity of structure and carries out linear reciprocal movement in linkage with the displacement of the actuator rod, when the position of the actuator rod is changed, the Linear guide guides the linear reciprocal movement of the counterweight frame；The counterweight installation steps of installation counterweight on the side of component occur in the resonance, the counterweight be installed on two apparent surfaces of the counterweight frame with the counterweight frame link, and the counterweight can increase along the longitudinal direction of blade or be reduced so that the movable block when counterweight frame makees linear reciprocal movement center of gravity can be located at the bar in；And resonance generates step, and resonance is generated in blade by so that the actuator rod is made linear reciprocal movement in linkage with counterweight frame and counterweight.
Description
Technical field
The present invention relates to maximize moving mass ratio (maximized for having for blade (blade) testing fatigue
Moving mass ratio) resonance generating means, and more particularly, to following having for blade fatigue test
Maximize moving mass than resonance generating means and using the resonance generating means method for testing fatigue：The resonance fills
It sets including the department of assembly lightweight (light-weighted), multiple actuators and resonance generator.The lightweight department of assembly is set
It is contacted at the outer surface with blade.The multiple actuator is arranged on the outside of the department of assembly.The resonance generator
It is configured to generate bending load associated with the displacement of actuator rod, and is configured to the movement with the actuator
Direction is reciprocating at the mode of parallel relation and prevents the resonance generator in the institute other than measurement direction simultaneously
There is the movement on direction.
Moving mass is maximized than being total to improved rigidity for having for blade fatigue test the present invention relates to following
Shake generating means and the method for testing fatigue using the resonance generating means：Wherein, by actuator be contained in the inside and with it is described
The counterweight frame that actuator moves in association is formed in a closed-loop form.
The present invention relates to it is following for blade fatigue test have maximize moving mass than resonance generating means
With the method for testing fatigue for using the resonance generating means：Because resonance generator has accounted for the major part weight of resonance generating means
Amount, so the resonance generating means is lightweight, and because additional weight (additional weights) can be attached to altogether
Vibration generator can be disassembled from resonance generator, so the resonance generating means provides higher convenience for users.
Background technology
For wind-power electricity generation purposes wind turbine blade and be configured to generate lift, thrust and control force aviation
It is slightly distinguished with blade, this is because：Blade for wind-power electricity generation is configured to obtain rotation necessary to making generator rotation
Turn power, thus to generate electric power.
The rotation of blade results in the aerodynamic profile around blade, and the effect of this phenomenon is produced on blade
Bending load and torsional load are given birth to.Therefore, it is necessary to there is such device：It can be monitored for the pneumatic of blade safety operation
Load, and the aerodynamic profile on leaf exhibition direction (spanwise) of blade can also be measured.Correspondingly, with more
Sample form has developed the resonance generating means being distributed for simulated air power.
For example, Korean Patent Application Publication the 10-2011-0078999th disclose it is a kind of be used for measure airload
Device (referring to Fig. 1), the device include the calibrator (-ter) unit 40 as one of its component.Calibrator (-ter) unit 40 includes：For by weight
Code receives multiple rings 41,42,43,44 thereon；And for the space 45 by blade containment in the inner.However, because school
Quasi- equipment 40 is surveyed in a manner of wherein connecting up the end of (wire) and being connected to ring 41,42,43,44 and repeatedly application torsion
Airload is measured, so this measurement method has limited tired measurement accuracy.
About another example, International Patent Application Publication WO2009/135136 discloses a kind of using linear reciprocating
Actuator 10,20,30 pairs of blades 2 carry out the system 1 of resonance test (referring to Fig. 2).
However, including examples detailed above traditional technology have the shortcomings that it is as follows：For carry out blade 2 resonance test be
System 1 expends great amount of cost, and because the boundary condition (boundary condition) of the system is clamped far from cantilever beam
Boundary condition (clamped condition), so resonant frequency has dropped.
Fig. 3 is by National Renewable Energy Laboratory (NREL：National Renewable Energy
Laboratory) the schematic diagram of the testing fatigue instrument of (U.S.) research and development.The testing fatigue instrument includes frame 7 and actuator 5,
Frame 7 is formed on the upper surface of blade, and actuator 5 is formed in frame 7 and for along the linear past of vertical direction
Multiple movement.Counterweight 6 can be suspended in the lower end of actuator 5 so that blade is along vertical vibration.
However, the durability of hydraulic actuator can be made bad as the conventional construction this example stated above has
The shortcomings that change, this is because：During the vibration of blade, generated on the counterweight 6 positioned at 5 lower end of actuator along
The load in leaf the exhibition direction and the tangential direction (chordwise) of blade all may be such that the seal member of actuator is worn.
Fig. 4 is by the schematic diagram of the U.S. NREL another testing fatigue instruments researched and developed.The testing fatigue instrument includes point
Not Wei Yu left and right side actuator 8, and actuator 8 is constructed such that counterweight 9 makees linear reciprocal movement along vertical direction,
Thus the vibration amplitude of blade is generated.
However, above-mentioned construction has the shortcomings that oil leak, this is because：Due to the center of gravity of the production line and counterweight 9 of actuator 8
Between misalignment thus side loading (side loads) is produced on actuator 8, this has inevitably resulted in cause
It moves the abrasion of the sealing element (seal) on device 8 and results in oil leak.
Fig. 5 is by the schematic diagram of the MTS UREX systems researched and developed.The UREX systems include actuator A and additional weight (W),
Actuator A is installed on the both sides of blade saddle P, additional weight (W) along blade B chordwise direction (that is, horizontal direction)
It is installed on actuator A.
In order to which actuator A is disposed along the chordwise direction of blade B, it is necessary to make exciting bank in vane thickness direction
Center of gravity in (that is, vertical direction) is aligned with pitch axis (pitch axis).By doing so, can reduce in the resonance test phase
The interior side loading generated by the movement of blade.
Although however, having above advantages, the UREX systems are due to taking such be constructed such that in it
It is not suitable for encouraging the purposes of large-scale blade.That is, because additional weight (W) only along actuator A a direction and
It is mounted, so when additional weight increases, with a certain distance from the center of gravity of mobile object block will have from the axis of actuator rod, because
This causes to generate side loading on actuator A.As a result, because the abrasion of actuator seal part accelerates, it durable
Property just reduces.
Invention content
The technical problem to be solved in the present invention
The present invention makes to solve the above-mentioned problem in the prior art, and therefore, the purpose of the present invention
Be to provide it is a kind of for blade fatigue test have maximize moving mass than resonance generating means, and more specifically, carry
For it is following for blade fatigue test have maximize moving mass than resonance generating means and occurred using the resonance
The method for testing fatigue of device：The resonance generating means includes lightweight department of assembly, multiple actuators and resonance generator；It is described light
Matter department of assembly is configured to contact with the outer surface of blade；The multiple actuator is arranged on the outside of the department of assembly；
The resonance generator is configured to generate associated with the displacement of actuator rod bending load, and be configured to it is described
The moving direction of actuator is at parallel relation reciprocating and prevents the resonance generator in addition to measurement direction simultaneously
The movement on all directions in addition.
It is a further object of the present invention to provide it is a kind of for blade fatigue test have maximize moving mass than be total to
Shake generating means and the method for testing fatigue using the resonance generating means, which has the rigidity of improvement, this
Be because：Actuator is contained in the inside and the counterweight frame that is moved in association with the main body of the actuator is with closed loop
(closed-loop) shape and be formed.
It is yet another object of the invention to provide it is a kind of for blade fatigue test have maximize moving mass than be total to
Shake generating means and the method for testing fatigue using the resonance generating means, because resonance generator has accounted for the resonance and filled
The most of weight set, so the resonance generating means is lightweight, and because counterweight can be attached to resonance generator or can
It is disassembled from resonance generator, so the resonance generating means provides higher convenience for users.
The technical solution adopted for solving the technical problem
To achieve the goals above, the present invention provides a kind of moving mass is maximized for having for blade fatigue test
The resonance generating means of ratio, the resonance generating means may include department of assembly, resonance generator and additional weight.The department of assembly
Including saddle and assembled portion, the saddle includes and the outer surface of the blade corresponding groove in form, the assembled portion
It is arranged at the outside of the saddle and is fastened by fastener so that the saddle applies pressure to the blade.It is described total
Vibration generator includes actuator, counterweight frame and Linear guide.The actuator is used for generating linear movement.The counterweight frame will
(one or more) described actuator accommodates in the inner, the counterweight frame have the closed-loop configuration that can improve the rigidity of structure and with
Linear reciprocal movement is made in the displacement of actuator rod in association.The Linear guide is configured to occur when the actuator rod
The Linear guide guides the linear reciprocal movement of the counterweight frame when displacement.The additional weight is installed in the counterweight
Two apparent surfaces of frame are upper and moved in association with the counterweight frame, and the quantity of the additional weight is along the leaf
The longitudinal direction of piece and increase or decrease so that making movable block (moving during the linear reciprocal movement of the counterweight frame
Masses center of gravity) is located on the actuator rod.
Another embodiment provides a kind of fatigues using the resonance generating means for blade fatigue test to survey
Method for testing, this method may include：Department of assembly is mounted on the blade, the department of assembly includes saddle and assembled portion, institute
It includes that corresponding groove, the assembled portion are arranged at the outer of the saddle in form with the outer surface of the blade to state saddle
Side and fastened by fastener so that the saddle to the blade apply pressure；Resonance generator is mounted on the assembly
On the side in portion, the resonance generator includes actuator, counterweight frame and Linear guide, and the actuator is used for generating linear
It is mobile, the counterweight frame will (one or more) described actuator receiving in the inner, the counterweight frame is with can improve structure
The closed-loop configuration of rigidity and make linear reciprocal movement in association with the displacement of actuator rod, the Linear guide is configured to
When the actuator rod is subjected to displacement, the Linear guide guides the linear reciprocal movement of the counterweight frame；By additional weight
On the side of the resonance generator, the counterweight be installed in the counterweight frame two apparent surfaces it is upper and with institute
Counterweight frame is stated to move in association, and the quantity of the counterweight can be increased or decreased along the longitudinal direction of the blade with
So that the center of gravity of movable block is made to be located on the bar during linear reciprocal movement of the counterweight frame；And it is described by making
Actuator rod makees linear reciprocal movement and correspondingly moves the counterweight frame and the additional weight, is generated on the blade
Resonance.
Beneficial effects of the present invention
According to the present invention, lightweight department of assembly is configured to contact with the outer surface of blade, and multiple actuators are arranged at institute
It states on the outside of department of assembly, moreover, the resonance for being configured to generate bending load associated with the displacement of actuator rod occurs
Device is reciprocating at the mode of parallel relation with the moving direction with the actuator, and at the same time preventing the resonance from occurring
Movement of the device on all directions other than the direction in addition to generating resonance.
According to the present invention, the movable block of the mobile resonance generator has accounted for the big portion in the resonance generating means
Divide weight, and the counterweight frame as the critical piece in the resonance generator is formed closed-loop configuration.Therefore, described
The generating means that resonates can be lightweight, and have higher intensity and durability.
Moreover, because counterweight can be attached to the side of the resonance generator and can be from the resonance generator
Side disassembles, so improving the convenience of user.
Description of the drawings
Fig. 1 is the stereogram of the calibrator (-ter) unit disclosed in Korean Patent Application Publication the 10-2011-0078999th；
Fig. 2 is the schematic diagram of the resonance test system disclosed in International Patent Application Publication WO2009/135136；
Fig. 3 is by the schematic diagram of the U.S. NREL testing fatigue instruments researched and developed；
Fig. 4 is by the schematic diagram of the U.S. NREL another testing fatigue instruments researched and developed；
Fig. 5 is by the schematic diagram of the MTS UREX systems researched and developed；
Fig. 6 is the solid of the resonance generating means according to the present invention for blade fatigue test-purpose in the mounted state
Figure；
Fig. 7 is the stereogram of the external structure of the resonance generating means according to the present invention for blade fatigue test；
Fig. 8 is one of the component illustrated as in the resonance generating means according to the present invention for blade fatigue test
The stereogram that is just being moved upward of counterweight frame；
Fig. 9 is the assembly as one of the component according to the present invention being used in the generating means that resonates of blade fatigue test
The stereogram in portion；
Figure 10 is as the master in the resonance generating means according to an embodiment of the invention for blade fatigue test
The exploded perspective view for the resonance generator to be constructed；
Figure 11 is the construction of the resonance generating means in accordance with another embodiment of the present invention for blade fatigue test
Exploded perspective view；
Figure 12 is linearly drawing in the resonance generating means according to an embodiment of the invention for blade fatigue test
The sectional view of the construction of guiding element；
Figure 13 is linear in the resonance generating means in accordance with another embodiment of the present invention for blade fatigue test
The sectional view of the construction of guiding piece；
Figure 14 is as the portion in the resonance generating means according to an embodiment of the invention for blade fatigue test
The stereogram of another construction of the department of assembly of one of part；
Figure 15 is the resonance generating means in accordance with another embodiment of the present invention for blade fatigue test in installation shape
Stereogram under state；
Figure 16 is the resonance generating means in accordance with another embodiment of the present invention for blade fatigue test in installation shape
Front view under state；
Figure 17 is linear in the resonance generating means in accordance with another embodiment of the present invention for blade fatigue test
The sectional view of guiding piece；And
Figure 18 is for illustrating to fill using the resonance according to an embodiment of the invention for blade fatigue test
The flow chart for the method for testing fatigue set.
The explanation of reference numeral
100：Department of assembly 110：Saddle (saddle)
112：Groove 116：Left and right limiting unit
117：Front and back limiting unit 118：Fastener (tightening member)
119：Block piece 120：Assembled portion
200：Resonate generator 220：Counterweight frame
240：Actuator 242：Actuator rod
244：Actuator body 246：Flow regulator
280：Linear guide 282：Connector (coupler)
284：Moving portion 285：Flange
286：Fixed part 287：Hole
300：Connector B：Blade
E：Resonate generating means W：Additional weight
Specific implementation mode
In one embodiment, provide it is a kind of for blade fatigue test have maximize moving mass than resonance
Generating means, the resonance generating means may include department of assembly, resonance generator and additional weight.The department of assembly includes saddle
And assembled portion.The saddle includes and the outer surface of the blade corresponding groove in form.The assembled portion is arranged at
The outside of the saddle and fastened by fastener so that the saddle to the blade apply pressure.The resonance occurs
Device includes actuator, counterweight frame and Linear guide.The actuator is used for generating linear movement.The counterweight frame is by actuator
Main body and actuator rod accommodate in the inner, the counterweight frame have the closed-loop configuration that can improve the rigidity of structure and with the actuating
Linear reciprocal movement is made in the displacement of device bar in association.The Linear guide is configured to be subjected to displacement when the actuator rod
Shi Suoshu Linear guides guide the linear reciprocal movement of the counterweight frame.The additional weight is installed in the counterweight frame
To be moved in association with the counterweight frame on two apparent surfaces, and the quantity of the additional weight can be along the leaf
The longitudinal direction of piece and increase or decrease so that making the center of gravity of movable block during the linear reciprocal movement of the counterweight frame
On the bar.
The Linear guide may include：It is configured to make linearly moving movement in association with the actuator rod
Portion；With the fixed part for the moving direction for being configured to guide the moving portion.
When the displacement of the actuator is " 0 ", the center of gravity of the resonance generator can be preferably located on pitch axis.
The center of gravity of the department of assembly can be preferably on pitch axis.
The Linear guide can be parallel in the direction stretched or shunk with the actuator side boot up
The movement of the counterweight frame.On the contrary, the Linear guide can prevent the counterweight frame from being stretched with the actuator
It is moved on the direction of exhibition or the direction intersection shunk.
The counterweight frame can be unlimited on the horizontal direction of the blade.
The resonance generating means may include block piece, and the block piece is arranged at the department of assembly and the resonance
Between generator, so that when the resonance generator generates resonance, the block piece limits the department of assembly relative to described
The movement of resonance generator.
The interconnecting piece can be formed preferably by composite material.
The saddle can be changed to another position and is fixed there on the longitudinal direction of the interconnecting piece.
The resonance generator can include extraly for making the actuator body be connect with what the assembled portion engaged
Head.
The Linear guide can be preferably located on following straight line：The straight line is by being installed in the counterweight frame
Two apparent surfaces on the counterweight center of gravity and extend.
In one embodiment, a kind of method for testing fatigue is provided, having most for blade fatigue test is used
Bigization moving mass than resonance generating means, the method for testing fatigue may include：Department of assembly is mounted on the blade
On, the department of assembly includes saddle and assembled portion, and the saddle includes corresponding recessed in form with the outer surface of the blade
Slot, the assembled portion are arranged at the outside of the saddle and are fastened by fastener so that the saddle is to the blade
Apply pressure；The generator that will resonate is mounted on the side of the department of assembly, and the resonance generator includes actuator, counterweight frame
And Linear guide, the actuator are used for generating linear movement, the counterweight frame holds (one or more) described actuator
It receives in the inner, the counterweight frame has the closed-loop configuration that can improve the rigidity of structure and makees in association with the displacement of actuator rod
Linear reciprocal movement, the Linear guide are configured to the Linear guide guiding when the actuator rod is subjected to displacement
The linear reciprocal movement of the counterweight frame；Additional weight is mounted on the side of the resonance generator, the counterweight is pacified
It is moved in association on two apparent surfaces of the counterweight frame and with the counterweight frame, and the quantity of the counterweight can
It is increased or decreased with the longitudinal direction along the blade to make shifting during the linear reciprocal movement of the counterweight frame
The center of gravity of motion block is arranged on the bar；And by making the actuator rod make linear reciprocal movement and correspondingly making the weight
Code frame and additional weight movement, thus generate resonance on the blade.
The installation of the department of assembly may include：The department of assembly is mounted to its center of gravity is made to be located at pitch axis
On.
The installation of the additional weight may include：So that the Linear guide is located across and is installed in the weight
The respective center of gravity of the counterweight on two apparent surfaces of code frame and on the straight line that extends.
In the generation of the resonance, depend on the mounted position of the resonance generator, generation it is described total
Shake can along for blade fatigue measurement direction valve direction (flap direction) and edge direction (edge
Direction a direction between).
The described of the resonance may include：According to the direction that the actuator rod is moved, generate along in institute
State the bending or torsion in the direction of the resonance generated at blade.
Embodiments of the present invention
Before the present invention will be described, it is to be understood that the term used in the specification and in the claims is not
It should be interpreted routine or dictionary meanings, but can should suitably define the concept of term based on the present inventor so as to most
The invention of himself this principle is described goodly, is interpreted meaning or concept that the technology main idea with the present invention is consistent.
Hereinafter, the present invention will be explained in more detail with reference to following Examples.However, following Examples simply to illustrate that mesh
And be provided, and therefore, following Examples do not limit the scope of the invention.
Illustrate to be used next, with reference to Fig. 6 is according to an embodiment of the invention for blade fatigue test
Resonate generating means (hereinafter referred to as " resonance generating means E ").
Fig. 6 is the stereograms of the resonance generating means E according to the present invention for blade fatigue test in the mounted state.
As shown in fig. 6, resonance generating means E is connected to the outer surface of testing fatigue object (that is, blade B) and resonates to generate,
Middle blade B is secured to stationary state while across the inside of resonance generating means E.
That is, resonance generating means E includes department of assembly 100 and multiple resonance generators 200.Department of assembly 100 is whole
On be connected in a manner of being contacted with the outer surface of blade B.The multiple resonance generator 200 is connected to department of assembly 100
Outside, will pass through and the extending longitudinally of actuator 240 and shrink and make linear reciprocal fortune relative to department of assembly 100 in association
It moves and generates resonance on blade B.
Resonance generating means E includes the additional weight W positioned at left and right side, and the quantity of additional weight W be can be according to
Rely the size in blade B, shape and center of gravity and increases or decreases.
More specifically, additional weight W is arranged on each resonance generator 200.Additional weight W is located at the cross in blade B
Outside on direction, and it is fixed in that along the horizontal direction (that is, longitudinal direction of blade B) of resonance generating means E
In this position faced.
Resonance generator 200 in resonance generating means E is configured to produce by moving up and down relative to blade B
Raw resonance, the resonance generator 200 are located at outside, and have accounted for most of weight in the total weight of resonance generating means E.
That is, resonance generator 200 be located on the outside of department of assembly 100, and be suspended on resonate generator 200 on additional weight
Code W makees linear reciprocal movement along upper and lower directions together.
Therefore, among multiple component parts of resonance generating means E, the resonance generator of resonance is generated on blade B
200 be the main composition part for the most of weight for having accounted for resonance generating means E.Therefore, the total weight of resonance generating means E
It reduces.
Connector 300 is formed between each resonance generator 200 and department of assembly 100.Connector 300 is connected to assembly
The upper and lower end in portion 100, and it is connected to each resonance generator 200 in the outside of department of assembly 100, therefore make each total
Vibration generator 200 is connected with department of assembly 100.
As set forth above, it is possible to so that resonance generator 200 is connected with department of assembly 100 using connector 300, but not
It is limited to this.For example, resonance generator 200 can directly be connect with department of assembly 100, in such a case, it is possible to omit connector
300。
Illustrate the construction of resonance generating means E next, with reference to Fig. 7 and Fig. 8.
Fig. 7 is the appearance for illustrating the resonance generating means according to an embodiment of the invention for blade fatigue test
Stereogram, and Fig. 8 be illustrate as it is according to an embodiment of the invention for blade fatigue test resonance fill
The stereogram that the counterweight frame of one of component in setting is moving up.
With reference to Fig. 7 and Fig. 8, resonance generating means E includes department of assembly 100 and resonance generator 200.Resonate generator 200
It is constructed such that the center of gravity of the resonance generator 200 when the displacement of the bar 242 of proper actuator 240 is " 0 " is located on pitch axis,
And when the displacement of the bar of actuator 240 242 changes, resonance generator 200 generates resonance (referring to Fig. 8).
With reference to Fig. 7, resonance operation of the generator 200 based on actuator 240 according to the preferred embodiment of the invention and generate
Resonance.That is, in the case of actuator body 244 is held in pre-position relative to blade B, work as actuator rod
When 242 position changes up and down relative to actuator body 244, resonance is produced.
More specifically, the length of actuator rod 242 is fed into actuating according to fluid by flow regulator 246
Direction when device 240 and be variable in the upper and lower directions of actuator body 244.At this moment, because actuator body 244 is opposite
It is maintained at for blade B in unconverted phase, so actuator rod 242 makees linear movement relative to actuator body 244.
Moreover, direction when actuator rod 242 can be introduced into actuator 240 according to fluid from flow regulator 246
And identical length (referring to Fig. 7) is protruded in 244 the upper side and lower side of actuator body, then along the upper of actuator body 244
Lower direction carries out linear movement, to inhibit the linear reciprocal movement of counterweight (W) (referring to Fig. 8).
In the following, will be described in detail the detailed configuration of resonance generating means E.
Hereinafter, by the detailed configuration of department of assembly 100 is illustrated with reference to Fig. 9.Fig. 9 is to be used for blade as according to the present invention
The stereogram of the department of assembly 100 of one of component in the resonance generating means E of testing fatigue.
Department of assembly 100 is configured to play a supportive role so that vibration force is transferred to blade B by the generator 200 that resonates.Assembly
Portion 100 includes saddle 110 and assembled portion 120, and saddle 110 is made of multiple components and is connected to around the outside of blade B,
Assembled portion 120 is configured to make blade B combine with saddle 110 by applying pressure to saddle 110.
Department of assembly 100 may include following saddle 110 and following assembled portion 120：Saddle 110 may include two with
On component and with the outer shape of blade B corresponding groove 112 in form；Assembled portion 120 is configured to pass through generation
The pressure internally acted on from the outside of saddle 110 makes the saddle 110 be maintained at the installation relation (mounted with blade B
Relationship in).
Groove 112 in saddle 110 is extended with shape corresponding with the section of blade B, so that：When component above and
Following component is moved to close to that at this point, the outer surface of groove 112 and blade B enter surface contact conditions, therefore, it is possible to
Power is transferred to blade B from resonance generating means E.
Assembled portion 120 is arranged at the upper side and lower side of saddle 110.Assembled portion 120 multiple components to can be made of
Saddle 110 provide pressure.It is set not shake along front-rear direction or along left and right directions in addition, assembled portion 120 limits saddle 110
It is dynamic.For this purpose, assembled portion 120 may include left and right limiting unit 116 and front and back limiting unit 117, left and right limiting unit 116 is used for limiting saddle
Seat 110 moves left and right (when observing in fig.9), and front and back limiting unit 117 is used for limiting the back-and-forth motion of saddle 110.In addition,
Assembled portion 120 includes the fastener 118 positioned at left and right side, these fasteners are by fastening assembled portion 120 come to saddle
Seat 110 applies pressure.
Department of assembly 100 is constructed such that its center of gravity is located on pitch axis.That is, because department of assembly 100 (including
Saddle 110, assembled portion 120 and fastener 118) center of gravity be located on pitch axis, so when blade B is moved up and down due to resonance
When, the side loadings such as torsion can be prevented.
Moreover, assembled portion 120 can be formed by composite material, to mitigate the weight of resonance generating means E and to increase rigid
Degree.
Hereinafter, referring to Fig.1 0 is illustrated the detailed configuration of resonance generator 200.
Figure 10 is being total to as the critical piece in the resonance generating means according to the present invention for blade fatigue test
The detailed exploded perspective view of vibration generator.Referring to Fig.1 0, resonance generator 200 includes actuator 240, and is constructed such that
The resonance power generated due to the variable-length of actuator 240 is passed via assembled portion 120, saddle 110 and blade B successively
It passs.
Therefore, resonance generator 200 and department of assembly 100 can be connected to each other in a wide variety of ways, as long as according to cause
The stretching, extension and contraction of the length of dynamic device 240 and the resonance power that generates can be passed to blade B.
The construction of embodiment shown in 0 referring to Fig.1, resonance generator 200 is with actuator 240 in association in department of assembly
Make linear reciprocal movement on 100 outside.The generator 200 that resonates includes counterweight frame 220, actuator 240 and Linear guide
280.Additional weight W is provided on counterweight frame 220.Actuator 240 is connected to the side of counterweight frame 220, for generating
The linear reciprocal movement of counterweight frame 220 and resonance will be provided to blade B.Linear guide 280 is configured to when actuator 240
(that is, when the actuator rod 242 is moved) Linear guide 280 guiding counterweight frame 220 when length is stretched or shunk
The movement relative to department of assembly 100.
The generator 200 that resonates includes such counterweight frame 220：The counterweight frame 220 is with the actuator rod with actuator 240
The 242 associated mode of displacement is moved, and wherein actuator body 244 has with the phase of department of assembly 100 identical phase
Position.
Counterweight frame 220 is designed to improve the rigidity of structure.Referring to Fig.1 0, counterweight frame 220 can be hollow, and by
It is configured to the closed loop shape being closed in a manner of being isolated from the outside.Actuator 240 is housed inside in counterweight frame 220.
Additional weight W is arranged on the surface towards counterweight frame 220, and the quantity of additional weight W can be along blade B
Longitudinal direction and increase or decrease.
Moreover, counterweight frame 220 can be hollowed out along the horizontal direction of blade B, so that actuator 240 is contained in it
It is interior.
Linear guide 280 is configured to guiding counterweight frame 220 and is moved in association with actuator 240, so that counterweight
Frame 220 along upper and lower directions by it is linear it is reciprocal in a manner of move.In one embodiment, 280 company of being connected to of Linear guide
Connect device 300.
That is, Linear guide 280 is in the direction parallel with the moving direction of actuator rod 242 of actuator 240
The movement of upper guiding counterweight frame 220, at the same prevent counterweight frame 220 stretched and shunk with actuator 240 direction (that is,
The direction of the linear reciprocal movement of actuator rod 242) intersection direction on movement.
For this purpose, Linear guide 280 includes extraly fixed part 286 and moving portion 284, fixed part 286 is used for maintaining phase
For the same phase of blade B, moving portion 284 makes phase change relative to blade B.
About fixed part 286 and moving portion 284, various embodiments are can be implemented as, as long as both parts
286,284 counterweight frame 220 and the linear reciprocal fortune of counterweight W can be guided according to the stretching, extension and contraction of the length of actuator 240
It moves and prevents the movement on intersection direction simultaneously.
Moreover, in one embodiment, connector 282 can be arranged at department of assembly 100 together between vibration generator 200,
And it is connect with connector 300.It can be across connector 282 and in fixed part 286 in the moving portion 284 of elongate along upper and lower directions
Interior sliding, fixed part 286 are formed on from the flange 285 that connector 282 extends forward.
Flange 285 may include the hole 287 that digging is worn in it, for accommodating actuator rod 242, and actuator rod
242 upper and lower end is connected to the upper and lower surface inside counterweight frame 220.For this purpose, the width of flange 285 can
With preferably correspond to the cut-out of counterweight frame 220 inner width or can be slightly smaller.
Flange 285 is set as each other across distance corresponding with the height of actuator body 244.The phase of a pair of flanges 285
Both sides are connected to the upper and lower surface of actuator body 244.
Therefore, when actuator 240, which is operable so that actuator rod 242, to be moved, counterweight frame 220 is relative to actuator body
244 movements.Moving portion 284 makees linear reciprocal movement across fixed part 286, thus guides the linear reciprocal fortune of counterweight frame 220
It is dynamic.
Additional weight W is connected to the both sides of counterweight frame 220, and the quantity of additional weight can as needed and increase or
It reduces.
Flow regulator 246 is connected to actuator body 244, and is fixed at its position.
Hereinafter, illustrating the resonance generator 200 according to another embodiment by referring to Fig.1 1.That is, Figure 11 figures
The resonance generator 200 in another modification embodiment is shown.Correspondingly, Figure 11 is illustrated according to another implementation of the present invention
The exploded perspective view of the construction of the resonance generating means for blade fatigue test of example.Figure 11, which is particularly illustrated, to be ensured to connect
First 282 with the example that can change additional weight W and the connection structure of Linear guide 280 in the case of enough rigidity.
That is, according to this embodiment, being provided with a single connector 282, and the connector 282 is connect directly to
Department of assembly 100 is without connector 300.Fixed part 286 is connected to connector 282, and is in elongate along vertical direction
Moving portion 284 be connected to the left and right side of 220 back side of counterweight frame.
Actuator 240 in counterweight frame 220 is connected to the front of connector 282 and is fixed there, and causes simultaneously
The upper and lower end of dynamic device bar 242 is connected to the upper and lower end of counterweight frame 220, to generate counterweight frame 220
Movement.
As described above, fixed part 286 and moving portion 284 can be changed in a wide variety of ways, as long as counterweight frame 220
It can make linear reciprocal movement during the movement of actuator rod 242.
Figure 12 is linearly drawing in the resonance generating means according to an embodiment of the invention for blade fatigue test
The section of guiding element, and Figure 13 is in the resonance generating means in accordance with another embodiment of the present invention for blade fatigue test
The section of Linear guide.Fixed part 286 and moving portion 284 are complementary in shape each other, and both can be formed
Various shapes and structure, as long as fixed part 286 and moving portion 284 can prevent counterweight frame 220 in addition to upper and lower directions
It is mobile on all directions in addition.
In the case where ensuring that connector 282 has enough rigidity, it is convenient to omit connector 300, in this case, connector
282 can directly engage with assembled portion 120.
Hereinafter, referring to Fig.1 4 are explained in detail the structure of the department of assembly 100 according to another embodiment.Figure 14 is diagram
The solid of the construction of department of assembly in resonance generating means according to an embodiment of the invention for blade fatigue test
Figure.
Referring to Fig.1 4, department of assembly 100 can be fixed in a manner of allowing saddle 110 to deviate to side (lopsided).
That is, because the pitch axis of blade B is located at about 1/4 point of chord of blade (chord), it is installed on department of assembly 100
Left and right side on the weight ratio of resonance generator 200 be determined based on the distance ratio away from the pitch axis.Therefore,
The size and counterweight W of actuator 240 are changeable.
This is typically unfavorable in the design phase of resonance generating means, because in order to make the resonance of the left and right sides occur
The center of gravity of device 200 is aligned with pitch axis will certainly just cause the Weight gap between the two generators 200 that resonate excessive.In order to
Alleviate above-mentioned disadvantage, assembled portion 120 can be lengthened out in side (referring to Figure 14), therefore to increase saddle 110 and resonance
The distance between generator 200.By doing so, can slow down resonate from pitch axis to left side generator 200 with from pitch axis
It resonates the distance between generator 200 gap to right side.
Naturally, this makes it possible to be mounted so as to saddle 110 to deviate to side relative to assembled portion 120.
Block piece 119 is arranged on the end of assembled portion 120, to increase for counterpart (that is, resonance occurs
Device 200) compressing force.Block piece 119 can be connected to end vibration generator 200 together relative to assembled portion 120
Between engage that a part presumptive area (that is, upper-side area, underside area, left area or right area), with
Just limitation resonance generator 200 even small movement (that is, probably due to the tolerance of the fixing components such as bolt and draw
The movement risen).
Illustrate for installing each of the resonance generating means tested for blade fatigue next, with reference to Figure 15 and Figure 16
Kind embodiment.
5 and Figure 16 referring to Fig.1 is not only equipped with resonance generator 200 on the side surface of department of assembly 100, but also is filling
The upper side and lower side with portion 100 is also equipped with resonance generator 200, to generate resonance along the edge direction of blade B.
Preferably, resonance generator 200 is placed in this way on the upper side and lower side of department of assembly 100, so that：Work as cause
When the displacement of dynamic device bar 242 is " 0 ", the center of gravity of resonance generator 200 is located on pitch axis.
It can also be by the operation of four actuators 240 shown in constitutional diagram 15 in a wide variety of ways come in blade
(B) torsion is generated on.For example, the actuator rod 242 for the resonance generator 200 that ought be installed with relative to one another is controlled so as in phase
When making linear reciprocal movement on negative direction, torsion is provided on blade (B).
Meanwhile generator 200 can be arranged in the left and right side of department of assembly 100 although Figure 16 depicts resonance,
But it is without being limited thereto.Therefore, resonance generator 200 can also be only arranged on the upper side and lower side, in this case,
Resonance is generated only along the direction at the edge of blade B.
Hereinafter, illustrating the Linear guide according to another embodiment by referring to Fig.1 7.Figure 17 is according to of the invention another
The sectional view of Linear guide in the resonance generating means for blade fatigue test of one embodiment.
Above with reference to as described in one embodiment, moving portion 284 and fixed part 286 are with linear in addition to actuator rod 242
The all confined mode of the movement on all directions other than the direction of reciprocating motion and be connected.In one embodiment,
Linear guide 280 can be located across the center of gravity of the additional weight (W) on two apparent surfaces for being installed in counterweight frame 220
And on the straight line extended.
That is, when Linear guide 280 is not located at by centered on actuator 240 and with apart one
The mode of set a distance it is facing with each other counterweight (W) center of gravity and when on the straight line that extends, generated according to the movement of counterweight (W)
Resonance just will produce the power in the direction intersected along the linear reciprocal movement direction with Linear guide 280, and will accelerate
The abrasion of moving portion 284 or fixed part 286.
Then, in order to extend the service life of Linear guide 280, construction as shown in figure 17 is preferred.
Illustrate the fatigue for the resonance generating means (E) for being constructed out using as described above next, with reference to Figure 18
Test method.
Figure 18 is for illustrating to fill using the resonance according to an embodiment of the invention for blade fatigue test
The flow chart for the method for testing fatigue set.
Include using according to the method for testing fatigue for being used for the resonance generating means that blade fatigue is tested of one embodiment
Following action in order：Department of assembly 100 is mounted on blade (B) (step S100)；Resonance generator 200 is mounted on
On the side of department of assembly 100 (step S200)；Additional weight (W) is mounted on the side of resonance generator (step S300)；
And by causing actuator rod to make linear reciprocal movement and counterweight frame and additional weight (W) therefore being caused correspondingly to move,
Resonance (step S400) is generated on blade (B).
During action (the step S100) for installing department of assembly, the center of gravity of department of assembly 100 is preferably placed at pitch axis
On.It, can be according to the resonance generator 200 installed in step s 200 in the action (step S400) for generating resonance
With the quantity of additional weight (W) and their position installed in step S300, generate in a wide variety of ways altogether
It shakes.
For example, during action (the step S400) for generating resonance, when in the valve direction of blade (B) and blade
(B) when selectively having selected measurement direction among edge direction, it is necessary to which resonance generator 200 is mounted on department of assembly 100
Upper and lower surface on or left surface and right surface on, and must by each actuator rod 242 control at along same side
To simultaneously make linear reciprocal movement.
When the measurement direction in the action (step S400) for generating resonance is not the valve direction of blade (B)
When not being the edge direction of blade (B), it is necessary to which the generator 200 that resonates is mounted on to upper surface, lower surface, the left side of department of assembly 100
On all surface in surface, right surface, and each actuator rod 242 must be controlled linear past at making simultaneously along same direction
There is movement again.
As another example, even if when resonance generator 200 is only installed at the upper and lower surface of department of assembly 100
It is upper or when being only installed on the left surface and right surface of department of assembly 100, it still can be by by each facing actuator
The operation direction controlling of bar 242 executes the testing fatigue of the distorting stress about blade (B) for opposite direction.
In this case, in the action (step S300) for installing counterweight, it is preferred that make Linear guide
The center of gravity of 280 additional weights (W) being located across on two apparent surfaces for being installed in counterweight frame 220 and the straight line extended
On.
Exemplary embodiment and advantage above-mentioned are only exemplary, and are understood not to be intended to limit these examples
Property embodiment.This technology introduction can be readily applied to other kinds of device.Moreover, the exemplary reality of present inventive concept
The explanation for applying example is also merely illustrative, rather than in order to limit the scope of the claims.
Claims (17)
1. it is a kind of for blade fatigue test have maximize moving mass than resonance generating means, the resonance fills
Set including：
Department of assembly, the department of assembly include saddle and assembled portion, the saddle include with the outer surface of the blade in form
Corresponding groove, the assembled portion are arranged at the outside of the saddle and are fastened by fastener so that the saddle is to institute
It states blade and applies pressure；
Resonate generator, and the resonance generator is connected to the outside of the department of assembly, and the resonance generator includes actuating
Device, counterweight frame and Linear guide, the actuator are used for generating linear movement, and the actuator is contained in by the counterweight frame
In the counterweight frame, the counterweight frame have can improve the rigidity of structure closed-loop configuration and with the actuator rod of the actuator
Displacement make linear reciprocal movement in association, the Linear guide is configured to be subjected to displacement when institute when the actuator rod
State the linear reciprocal movement that Linear guide guides the counterweight frame；And
Additional weight, two apparent surfaces that the additional weight is installed in the counterweight frame are upper and related to the counterweight frame
Connection ground is mobile, and the quantity of the additional weight is increased or decreased along the longitudinal direction of the blade so that described
The center of gravity of movable block is set to be located on the actuator rod during the linear reciprocal movement of counterweight frame.
2. resonance generating means according to claim 1, wherein the Linear guide includes：
Moving portion, the moving portion are configured to make linear movement in association with the actuator rod；With
Fixed part, the fixed part are configured to guide the moving direction of the moving portion.
3. resonance generating means according to claim 1, wherein when the displacement of the actuator is " 0 ", the resonance
The center of gravity of generator is located on the pitch axis of the blade.
4. resonance generating means according to claim 1 or 3, wherein the center of gravity of the department of assembly is in the blade
On pitch axis.
5. resonance generating means according to claim 2, wherein the Linear guide is stretched with the actuator
The parallel side in the direction of exhibition or contraction boots up the movement of the counterweight frame.
6. resonance generating means according to claim 2, wherein the Linear guide prevent the counterweight frame with institute
State the movement on the direction for the direction intersection that actuator is stretched or shunk.
7. resonance generating means according to claim 1, wherein the counterweight frame is on the horizontal direction of the blade
It is open.
8. resonance generating means according to claim 1, further includes block piece, the block piece is arranged at the dress
With between portion and the resonance generator, and when the resonance generator generates resonance, the block piece limits the assembly
Movement of the portion relative to the resonance generator.
9. resonance generating means according to claim 1, wherein the assembled portion is formed by composite material.
10. resonance generating means according to claim 1, wherein the saddle can be in the longitudinal direction side of the assembled portion
It is changed to another position upwards and is fixed there.
11. resonance generating means according to claim 1, wherein the resonance generator further includes for by the cause
The connector that the main body of dynamic device is engaged with the assembled portion.
12. resonance generating means according to claim 2, wherein the Linear guide, which is located across, is installed in institute
State the center of gravity of the additional weight on two apparent surfaces of counterweight frame and on the straight line that extends.
13. a kind of method for testing fatigue, using for blade fatigue test have maximize moving mass than resonance send out
Generating apparatus, the method for testing fatigue include the following steps：
Department of assembly is installed on the blade, the department of assembly includes saddle and assembled portion, and the saddle includes and the blade
Outer surface corresponding groove in form, the assembled portion be arranged at the outside of the saddle and by fastener fasten with
So that the saddle applies pressure to the blade；
On the side of the department of assembly installation resonance generator, the resonance generator include actuator, counterweight frame and linearly
Guiding piece, the actuator are used for generating linear movement, and the counterweight frame is by the actuator body and actuator of the actuator
Bar is contained in the counterweight frame, the counterweight frame have can improve the rigidity of structure closed-loop configuration and with the actuator rod
Displacement make linear reciprocal movement in association, the Linear guide is configured to be subjected to displacement when institute when the actuator rod
State the linear reciprocal movement that Linear guide guides the counterweight frame；
Additional weight is installed on the side of the resonance generator, the additional weight is installed in two of the counterweight frame
Apparent surface is upper and is moved in association with the counterweight frame, the quantity of the additional weight along the blade longitudinal direction
And it increases or decreases so that the center of gravity of movable block is made to be located at the actuating during linear reciprocal movement of the counterweight frame
On device bar；And
By making the actuator rod of the actuator make linear reciprocal movement and thus making the counterweight frame and described additional
Counterweight moves, and resonance is generated on the blade.
14. method for testing fatigue according to claim 13, wherein the step of installing the department of assembly include：It will be described
Department of assembly is mounted on the pitch axis for making its center of gravity be located at the blade.
15. method for testing fatigue according to claim 13, wherein the step of installing the additional weight include：Make institute
It is respective heavy to state the additional weight that Linear guide is located across on two apparent surfaces for being installed in the counterweight frame
The heart and on the straight line that extends.
16. method for testing fatigue according to claim 13, wherein in the step of generating the resonance, depend on institute
The installation site of resonance generator is stated, generated resonance is along for the valve direction of blade fatigue measurement direction and edge side
A direction between.
17. method for testing fatigue according to claim 16, wherein the step of generating the resonance include：According to described
The moving direction of actuator rod generates the bending or torsion in the direction along the resonance generated at the blade.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/KR2014/004535 WO2014189283A1 (en) | 2013-05-16 | 2014-05-21 | Resonance generating device for testing fatigue of blade that maximizes moving mass ratio and fatigue testing method using same |
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| CN105593661B true CN105593661B (en) | 2018-10-30 |
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| CN110177938B (en) * | 2016-11-30 | 2021-02-26 | 维斯塔斯风力系统有限公司 | Torsion testing of wind turbine blades |
| CN106840928B (en) * | 2017-04-19 | 2019-02-01 | 山东理工大学 | Wind electricity blade fatigue loading experimental rig |
| CN110231231B (en) * | 2019-06-28 | 2021-07-09 | 东北大学 | Vibration fatigue test device for axial variable stress ratio of metal material and mounting method thereof |
| CN114458854B (en) * | 2022-02-17 | 2023-08-04 | 中国核电工程有限公司 | Method for reducing vibration fatigue of pipeline and pipeline |
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| CN105190284A (en) * | 2013-05-16 | 2015-12-23 | 韩国机械研究院 | Resonance generating apparatus with reduced side loads for a blade's fatigue testing |
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| US8621934B2 (en) * | 2007-12-14 | 2014-01-07 | Alliance For Sustainable Energy, Llc | Dual-axis resonance testing of wind turbine blades |
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|---|---|---|---|---|
| CN102124315A (en) * | 2008-04-14 | 2011-07-13 | 国家可再生能源中心有限公司 | Specimen loading apparatus and method |
| KR101048618B1 (en) * | 2008-12-31 | 2011-07-13 | 한국항공우주연구원 | Helicopter Rotor Blade Fatigue Tester |
| CN202471379U (en) * | 2012-01-20 | 2012-10-03 | 中航惠腾风电设备股份有限公司 | Fatigue test device for shimmy direction of large-scale wind wheel blade |
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