CN105593661A - Resonance generating device for testing fatigue of blade that maximizes moving mass ratio and fatigue testing method using same - Google Patents
Resonance generating device for testing fatigue of blade that maximizes moving mass ratio and fatigue testing method using same Download PDFInfo
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- CN105593661A CN105593661A CN201480029338.8A CN201480029338A CN105593661A CN 105593661 A CN105593661 A CN 105593661A CN 201480029338 A CN201480029338 A CN 201480029338A CN 105593661 A CN105593661 A CN 105593661A
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Abstract
A resonance generating device for testing fatigue of a blade that maximizes a moving mass ratio according to the present invention comprises: a mounting means; a resonance generating means; and weights. The mounting means comprises a mounting part having a mounting groove with a shape corresponding to the outer surface of the blade; and a coupling part located at the outside of the mounting part and coupled by a coupling member so that the mounting part pressurizes the blade. The resonance generating means comprises: an actuator generating a linear movement; a weight frame, provided at the outside of the mounting means, for receiving a body and a load of the actuator therein, and having a closed-loop shape for improving structural stiffness to interlock with a displacement of the load of the actuator, thereby performing a linear reciprocating motion; and a linear guider for guiding the linear reciprocating motion of the weight frame when the position of the load of the actuator is changed. The weights are mounted on the opposite surfaces of the weight frame to interlock with the weight frame and can increase and decrease in the longitudinal direction of the blade so that the center of gravity of the moving mass can be located in the load when the weight frame performs the linear reciprocating motion. A method of testing fatigue using the resonance generating device for testing fatigue of a blade according to the present invention comprises: a mounting means installation step for installing a mounting means at a blade which is an element of a resonance generating device for testing fatigue of a blade, the mounting means comprising a mounting part having a mounting groove with a shape corresponding to the outer surface of the blade, and a coupling part located at the outside of the mounting part and coupled by a coupling member so that the mounting part pressurizes the blade; a resonance generating means installation step for installing a resonance generating means at one side of the mounting means, the resonance generating means comprising an actuator generating a linear movement, a weight frame provided at the outside of the mounting means for receiving a body and a load of the actuator therein and having a closed-loop shape for improving structural stiffness to interlock with a displacement of the load of the actuator, thereby performing a linear reciprocating motion, and a linear guider for guiding the linear reciprocating motion of the weight frame when the position of the load of the actuator is changed; a weight installing step for installing weights at one side of the resonance generating means, the weights being mounted on the opposite surface of the weight frame to interlock with the weight frame and being capable of increasing and decreasing in the longitudinal direction of the blade so that the center of gravity of the moving mass can be located in the load when the weight frame performs the linear reciprocating motion; and a resonance generating step for generating resonance in the blade by allowing the load of the actuator to be interlocked with the weight frame and the weights by means of a linear reciprocating motion.
Description
Technical field
The present invention relates to the moving mass ratio of maximization that has for blade (blade) testing fatigue(maximizedmovingmassratio) resonance generating means, and more specifically, relate to asUnder the resonance generating means and the use that maximize moving mass ratio of having for blade testing fatigueThe method for testing fatigue of this resonance generating means: this resonance generating means comprises lightweight(light-weighted) department of assembly, multiple actuator and resonance generator. Described lightweight department of assemblyBe configured to contact with the outer surface of blade. Described multiple actuator is arranged at described department of assemblyOn outside. Described resonance generator is configured to generate the bending being associated with the displacement of actuator rodLoad, and be configured to to become the mode of parallel relation to do past with the moving direction of described actuatorReciprocating cutter and simultaneously prevent that described resonance generator is in all directions except measurement directionMotion.
The present invention relates to following thering is the moving mass of maximization ratio and changing for blade testing fatigueThe method for testing fatigue of the resonance generating means of good rigidity and this resonance generating means of use: wherein,The counterweight frame that actuator is contained in to the inside and move explicitly with described actuator is with the shape of closed loopFormula and being formed.
The present invention relates to following maximize being total to of moving mass ratio for having of blade testing fatigueGenerating means and the method for testing fatigue that uses this resonance generating means shake: because resonance generator accounts forGo most of weight of resonance generating means, so this resonance generating means is lightweight, andBecause additional weight (additionalweights) can be attached to resonance generator or can occur from resonanceOn device, disassemble, so this resonance generating means provides higher user's convenience.
Background technology
For the wind turbine blade of wind-power electricity generation purposes be configured to produce lift, thrust andThe aviation of control is slightly had any different with blade, this be because: the blade for wind-power electricity generation is constructedBecome acquisition to make generator rotate necessary revolving force, to produce thus electric power.
The rotation of blade has caused distributing at blade ambient air power, and the effect of this phenomenonOn blade, to have produced bending load and torsional load. Therefore, must there is such device: itsThe airload for blade safety operation can be monitored, and the leaf exhibition at blade can be measured(spanwise) aerodynamic profile in direction. Correspondingly, develop with diversified formBe used for simulated air power distribute resonance generating means.
For example, korean patent application disclose disclosed for No. 10-2011-0078999 one be used for measureThe device (referring to Fig. 1) of airload, this device comprises the calibrator (-ter) unit of one of parts as it40. Calibrator (-ter) unit 40 comprises: for counterweight being received to multiple rings 41,42,43,44 thereon;And be used for blade to hold space 45 in the inner. But, because calibrator (-ter) unit 40 is with cloth whereinThe end of line (wire) is connected to ring 41,42,43,44 and applies repeatedly the mode of torsionMeasure airload, so this metering system has limited tired certainty of measurement.
About another example, International Patent Application Publication WO2009/135136 has disclosed one and has madeWith 10,20,30 pairs of blades 2 of the reciprocating actuator of linearity resonate test system 1 (referring toFig. 2).
But, comprise that the conventional art of above-mentioned example has following shortcoming: be used for carrying out blade 2The system 1 of resonance test expend great amount of cost, and because the boundary condition of this system(boundarycondition) be far from the clamped boundary condition (clampedcondition) of cantilever beam,So resonant frequency has declined.
Fig. 3 is by National Renewable Energy Laboratory (NREL:NationalRenewableEnergyLaboratory) schematic diagram of the testing fatigue instrument of (U.S.) research and development. This testing fatigue instrument bagDraw together framework 7 and actuator 5, framework 7 is formed on the upper surface of blade, and actuator 5 is formedIn framework 7 and for the linear reciprocal movement along vertical direction. Counterweight 6 can be suspended inThe lower end of actuator 5 so that blade along vertical vibration.
But the conventional construction as this illustrated above example has can make hydraulic actuationThe deteriorated shortcoming of durability of device, this be because: in during the vibration of blade, be positioned at actuatingThe exhibition direction of the leaf along blade and tangential (chordwise) that on the counterweight 6 of device 5 lower end, produceThe load of direction all may make the seal member of actuator be worn.
Fig. 4 is the schematic diagram of the another kind of testing fatigue instrument researched and developed by U.S. NREL. This fatigueTester comprises the actuator 8 that lays respectively at left side and right side, and actuator 8 is constructed such that weightCode 9 is made linear reciprocal movement along vertical direction, produces thus the vibration amplitude of blade.
But above-mentioned structure has the shortcoming of leakage of oil, this be because: due to the operation of actuator 8Misalignment between the center of gravity of line and counterweight 9 thereby produced side loading (side on actuator 8Loads), this has just inevitably caused the wearing and tearing of the seal (seal) on actuator 8 and has ledCause leakage of oil.
Fig. 5 is the schematic diagram of the UREX system researched and developed by MTS. This UREX system comprises and causingMoving device A and additional weight (W), actuator A is installed on the both sides of blade saddle P, attachedAdd counterweight (W) and be installed in actuator along the chordwise direction (, horizontal direction) of blade BOn A.
For actuator A is settled along the chordwise direction of blade B, must make exciting bankCenter of gravity in vane thickness direction (, vertical direction) is aimed at pitch axis (pitchaxis).By doing like this, can reduce the described side being produced by the motion of blade in resonance test periodTo load.
But although have advantages of above-mentionedly, described UREX system is owing to having taked like thisStructure so that it is not suitable for encouraging the purposes of large-scale blade. That is to say, because additional weightCode (W) is only being mounted along a direction of actuator A, so increase when additional weightTime, the center of gravity of mobile object piece will have with a certain distance from the axle of actuator rod, therefore causes causingThe upper side loading that produces of moving device A. As a result, because the wearing and tearing of actuator seal have accelerated, soIts durability has just reduced.
Summary of the invention
The technical problem to be solved in the present invention
The present invention makes in order to solve the problem occurring in above-mentioned prior art, and therefore,The object of this invention is to provide and a kind ofly maximize moving mass ratio for the having of blade testing fatigueResonance generating means, and more specifically, provide the following maximum that has for blade testing fatigueChange the resonance generating means of moving mass ratio and the method for testing fatigue of this resonance generating means of use:This resonance generating means comprises lightweight department of assembly, multiple actuator and resonance generator; Described lightweightDepartment of assembly is configured to contact with the outer surface of blade; Described multiple actuator is arranged at described dressJoin on the outside of portion; Described resonance generator is configured to generate and is associated with the displacement of actuator rodBending load, and be configured to become parallel relation and do past with the moving direction of described actuatorReciprocating cutter and simultaneously prevent that described resonance generator is in all directions except measurement directionMotion.
Another object of the present invention is to provide a kind of maximization that has for blade testing fatigue and movesThe method for testing fatigue of the resonance generating means of mass ratio and this resonance generating means of use, this resonanceGenerating means has the rigidity of improvement, this be because: by actuator be contained in the inside and cause with describedThe counterweight frame that the main body of moving device moves is explicitly formed with closed loop (closed-loop) shape.
Another object of the present invention is to provide a kind of maximization that has for blade testing fatigue and movesThe method for testing fatigue of the resonance generating means of mass ratio and this resonance generating means of use, because altogetherAccounted for most of weight of this resonance generating means of vibration generator, so this resonance generating means isLightweight, and because counterweight can be attached to resonance generator or can disassemble from resonance generator,So this resonance generating means provides higher user's convenience.
The technical scheme that technical solution problem is taked
To achieve these goals, the invention provides a kind of having for blade testing fatigueThe resonance generating means of largeization moving mass ratio, this resonance generating means can comprise department of assembly, be total toVibration generator and additional weight. Described department of assembly comprises saddle and assembled portion, described saddle comprise withThe outer surface of described blade is the groove of correspondence in form, and described assembled portion is arranged at described saddleOutside and fastener fastening so that described saddle is exerted pressure to described blade. Described commonVibration generator comprises actuator, counterweight frame and Linear guide. Described actuator is used for producing linearMobile. Described counterweight frame holds described to (one or more) actuator in the inner, described counterweightFrame has and can improve the closed-loop configuration of the rigidity of structure and make explicitly line with the displacement of actuator rodProperty moves back and forth. Described in described Linear guide is configured in the time that described actuator rod is subjected to displacementLinear guide guides the linear reciprocal movement of described counterweight frame. Described additional weight is installed in instituteTwo apparent surfaces that state counterweight frame go up and move explicitly with described counterweight frame, and described attachedThe quantity that adds counterweight is along the longitudinal direction of described blade and increase or reduce to make at described counterweightDuring the linear reciprocal movement of frame, make the center of gravity of movable block (movingmasses) cause described in being positioned atOn moving device bar.
In another embodiment, provide a kind of use to occur for the resonance of blade testing fatigueThe method for testing fatigue of device, the method can comprise: department of assembly is arranged on described blade,Described department of assembly comprises saddle and assembled portion, and described saddle comprises with the outer surface of described blade shapeCorresponding groove in formula, it is fastening that described assembled portion is arranged at outside and the fastener of described saddleTo make described saddle to exert pressure to described blade; Resonance generator is arranged on to described assemblingIn one side of portion, described resonance generator comprises actuator, counterweight frame and Linear guide, described inActuator is used for producing Linear-moving, and described counterweight frame holds described to (one or more) actuatorReceive in the inner, described counterweight frame has closed-loop configuration and and the actuator rod that can improve the rigidity of structureDisplacement make explicitly linear reciprocal movement, described Linear guide is configured to when described actuatingDescribed in when device bar is subjected to displacement, Linear guide guides the linear reciprocal movement of described counterweight frame; By attachedAdd in the side that counterweight is arranged on described resonance generator, described counterweight is installed in described counterweight frameTwo apparent surfaces upper and move explicitly with described counterweight frame, and the quantity of described counterweight canIncrease or reduce to make in the linearity of described counterweight frame past with the longitudinal direction along described bladeDuring reciprocating cutter, make the center of gravity of movable block be positioned on described bar; And by making described actuator rodMake linear reciprocal movement and correspondingly make described counterweight frame and described additional weight move, at described leafOn sheet, produce resonance.
Beneficial effect of the present invention
According to the present invention, lightweight department of assembly is configured to contact with the outer surface of blade, multiple actuatingsDevice is arranged on the outside of described department of assembly, and, be configured to produce and the position of actuator rodThe resonance generator of the bending load of phase shift association is to become parallel pass with the moving direction of described actuatorSystem mode reciprocating, and prevent simultaneously described resonance generator except produce resonanceMovement in all directions beyond direction.
According to the present invention, the described resonance that accounted for of the movable block of mobile described resonance generator occursMost of weight in device, and as the described counterweight of the critical piece in described resonance generatorFrame is formed closed-loop configuration. Therefore, described resonance generating means can be lightweight, and hasHigher intensity and durability.
And, because counterweight can be attached to described resonance generator a side and can be from describedOne side of resonance generator disassembles, so improved user's convenience.
Brief description of the drawings
Fig. 1 is the calibrator (-ter) unit disclosing in korean patent application discloses No. 10-2011-0078999Stereogram;
Fig. 2 is the resonance test macro disclosing in International Patent Application Publication WO2009/135136Schematic diagram;
Fig. 3 is the schematic diagram of the testing fatigue instrument researched and developed by U.S. NREL;
Fig. 4 is the schematic diagram of the another kind of testing fatigue instrument researched and developed by U.S. NREL;
Fig. 5 is the schematic diagram of the UREX system researched and developed by MTS;
Fig. 6 is that the resonance generating means for blade testing fatigue purposes according to the present invention is being installedStereogram under state;
Fig. 7 is according to the external structure of the resonance generating means for blade testing fatigue of the present inventionStereogram;
Fig. 8 illustrates as the resonance generating means for blade testing fatigue according to the present inventionIn the stereogram that is just being moved upward of the counterweight frame of one of parts;
Fig. 9 is the portion as the resonance generating means for blade testing fatigue according to the present inventionThe stereogram of the department of assembly of one of part;
Figure 10 is as the resonance generation for blade testing fatigue according to an embodiment of the inventionThe exploded perspective view of the resonance generator of the main structure in device;
Figure 11 fills for the resonance of blade testing fatigue in accordance with another embodiment of the present inventionThe exploded perspective view of the structure of putting;
Figure 12 is the resonance generating means for blade testing fatigue according to an embodiment of the inventionIn the sectional view of structure of Linear guide;
Figure 13 fills for the resonance of blade testing fatigue in accordance with another embodiment of the present inventionThe sectional view of the structure of the Linear guide in putting;
Figure 14 is as the resonance generation for blade testing fatigue according to an embodiment of the inventionThe stereogram of another structure of the department of assembly of one of parts in device;
Figure 15 fills for the resonance of blade testing fatigue in accordance with another embodiment of the present inventionPut the stereogram under installment state;
Figure 16 fills for the resonance of blade testing fatigue in accordance with another embodiment of the present inventionPut the front view under installment state;
Figure 17 fills for the resonance of blade testing fatigue in accordance with another embodiment of the present inventionThe sectional view of the Linear guide in putting; And
Figure 18 is used for explanation use according to an embodiment of the invention for blade testing fatigueThe flow chart of the method for testing fatigue of resonance generating means.
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: securing member (tighteningmember)
119: block piece 120: assembled portion
200: resonance generator 220: counterweight frame
240: actuator 242: actuator rod
244: actuator body 246: flow regulator
280: Linear guide 282: joint (coupler)
284: moving part 285: flange
286: fixed part 287: hole
300: connector B: blade
E: resonance generating means W: additional weight
Detailed description of the invention
In one embodiment, providing a kind of maximizes mobile for having of blade testing fatigueThe resonance generating means of mass ratio, this resonance generating means can comprise department of assembly, resonance generatorAnd additional weight. Described department of assembly comprises saddle and assembled portion. Described saddle comprises and described bladeOuter surface corresponding groove in form. Described assembled portion is arranged at the outside of described saddleAnd fastener fastening so that described saddle is exerted pressure to described blade. Described resonance occursDevice comprises actuator, counterweight frame and Linear guide. Described actuator is used for producing Linear-moving.Described counterweight frame holds actuator body and actuator rod in the inner, and described counterweight frame has canImprove the closed-loop configuration of the rigidity of structure and do explicitly back and forth linear with the displacement of described actuator rodMotion. Described Linear guide be configured in the time that described actuator rod is subjected to displacement described in linearity drawGuiding element guides the linear reciprocal movement of described counterweight frame. Described additional weight is installed in described counterweightTwo apparent surfaces of frame are upper to move explicitly with described counterweight frame, and described additional weightQuantity can increase or reduce to make at described counterweight frame along the longitudinal direction of described bladeLinear reciprocal movement during in the center of gravity of movable block is positioned on described bar.
Described Linear guide can comprise: be configured to make explicitly line with described actuator rodThe moving part that property moves; With the fixed part that is configured to the moving direction that guides described moving part.
In the time that the displacement of described actuator is " 0 ", the center of gravity of described resonance generator can be preferablyBe positioned on pitch axis.
The center of gravity of described department of assembly can be preferably on pitch axis.
Described Linear guide can be parallel in the direction that stretches or shrink with described actuatorIn direction, guide the movement of described counterweight frame. On the contrary, described in described Linear guide can preventCounterweight frame is moved in the crossing direction of the direction that stretches or shrink with described actuator.
Described counterweight frame can opening wide at described blade in a lateral direction.
Described resonance generating means can comprise block piece, and described block piece is arranged at described assemblingBetween portion and described resonance generator, while producing resonance with the described resonance generator of box lunch, described resistanceBlock piece limits the movement of described department of assembly with respect to described resonance generator.
Described connecting portion can preferably be formed by composite.
Described saddle can be changed to another position and quilt on the longitudinal direction of described connecting portionBe fixed on there.
Described resonance generator can comprise extraly for making described actuator body and described assemblingThe joint that portion engages.
Described Linear guide can be preferably located on following straight line: this straight line is through being mountedThe center of gravity of the described counterweight on two apparent surfaces of described counterweight frame and extending.
In one embodiment, provide a kind of method for testing fatigue, it uses for blade fatigueThe resonance generating means with maximization moving mass ratio of test, described method for testing fatigue is passableComprise: department of assembly is arranged on described blade, and described department of assembly comprises saddle and assembled portion, instituteState saddle and comprise and the outer surface of described blade corresponding groove in form, described assembled portion is establishedBe placed in the outside of described saddle and fastener fastening so that described saddle is executed described bladePlus-pressure; Resonance generator is arranged in a side of described department of assembly to described resonance generator bagDraw together actuator, counterweight frame and Linear guide, described actuator is used for producing Linear-moving, described inCounterweight frame holds described to (one or more) actuator in the inner, and described counterweight frame has canImprove the closed-loop configuration of the rigidity of structure and make explicitly linear back and forth fortune with the displacement of actuator rodMoving, described Linear guide be configured in the time that described actuator rod is subjected to displacement described in linear guidePart guides the linear reciprocal movement of described counterweight frame; Additional weight is arranged on to described resonance generatorA side on, described counterweight be installed in two apparent surfaces of described counterweight frame upper and with described weightCode frame moves explicitly, and the quantity of described counterweight can be along the longitudinal direction of described bladeAnd increase or reduce to make the center of gravity of movable block in during the linear reciprocal movement of described counterweight frameBe arranged on described bar; And by making described actuator rod make linear reciprocal movement and correspondingly makeDescribed counterweight frame and described additional weight move, and produce thus resonance on described blade.
The described installation of described department of assembly can comprise: described department of assembly is mounted to the center of gravity that makes itBe positioned on pitch axis.
The described installation of described additional weight can comprise: described Linear guide is positioned at through quiltBe arranged on center of gravity separately of described counterweight on two apparent surfaces of described counterweight frame and extend straightOn line.
In the described generation of described resonance, depend on the position that described resonance generator is mounted,The described resonance occurring can be along the lobe direction (flap for blade testing fatigue directionDirection) direction and between edge direction (edgedirection).
The described generation of described resonance can comprise: the direction being moved according to described actuator rod,Produce along the bending or torsion of the direction of the described resonance producing at described blade place.
Embodiments of the present invention
Before the present invention will be described, it being understood that in description and claimsThe term using should not be interpreted as routine or dictionary meanings, but should be based on inventor's energyEnough suitably define the concept of term to describe best his this principle of invention, separatedBe interpreted as the implication or the concept that conform to technology main idea of the present invention.
Below, with reference to following example, the present invention is described in further detail. But following example onlyBe provided for illustrative purposes, and therefore, following example does not limit the scope of the invention.
Below, with reference to Fig. 6 illustrate used according to an embodiment of the invention for leafThe resonance generating means (following, to be called " resonance generating means E ") of sheet testing fatigue.
Fig. 6 is that the resonance generating means E for blade testing fatigue according to the present invention is installing shapeStereogram under state. As shown in Figure 6, (, resonance generating means E is connected to testing fatigue objectBlade B) outer surface to produce resonance, its Leaf B is through resonance generating means E'sInner time, be secured to stationary state.
That is to say, resonance generating means E comprises department of assembly 100 and multiple resonance generator 200.Department of assembly 100 is connected in the mode contacting with the outer surface of blade B on the whole. Described multipleResonance generator 200 is connected to the outside of department of assembly 100, so that by with actuator 240Extending longitudinally and shrink and make linear reciprocal movement with respect to department of assembly 100 explicitly and at blade BUpper generation resonance.
Resonance generating means E comprises the additional weight W that is positioned at left side and right side, and additional weight WQuantity be size, shape and the center of gravity that can depend on blade B and increase or reduce.
More specifically, additional weight W is arranged on each resonance generator 200. Additional weight WBe located at the outside in a lateral direction of blade B, and along the horizontal side of resonance generating means EBe fixed in the position facing with each other to (, the longitudinal direction of blade B).
Resonance generator 200 in resonance generating means E is configured to by entering with respect to blade BRow moves up and down to produce resonance, and described resonance generator 200 is positioned at outside and the resonance that accounted forMost of weight in the gross weight of generating means E. That is to say, resonance generator 200 is positioned atOn the outside of department of assembly 100, and together with being suspended on the additional weight W resonating on generator 200Make linear reciprocal movement along above-below direction.
Therefore,, among multiple component parts of resonance generating means E, on blade B, produce altogetherThe resonance generator 200 that shakes is to have accounted for the main composition of most of weight of resonance generating means EParts. Therefore, the gross weight of resonance generating means E has reduced.
Connector 300 is formed between each resonance generator 200 and department of assembly 100. Connector300 are connected to upper end and the bottom of department of assembly 100, and at the outside of department of assembly 100 quiltBe connected to each resonance generator 200, therefore make each resonance generator 200 be connected with department of assembly 100Come.
As mentioned above, can adopt connector 300 make to resonate generator 200 and department of assembly 100Couple together, but be not limited to this. For example, resonance generator 200 can be directly and department of assembly 100Connect, in this case, can omit connector 300.
The structure of resonance generating means E is described with reference to Fig. 7 and Fig. 8 below.
Fig. 7 illustrates according to an embodiment of the invention to send out for the resonance of blade testing fatigueThe stereogram of the outward appearance of generating apparatus, and Fig. 8 illustrates as according to an embodiment of the inventionThe counterweight frame that is used for one of parts of the resonance generating means of blade testing fatigue moves upStereogram.
With reference to Fig. 7 and Fig. 8, resonance generating means E comprises department of assembly 100 and resonance generator 200.Resonance generator 200 is constructed such that should when the displacement of the bar 242 of proper actuator 240 is " 0 "The center of gravity of resonance generator 200 is positioned on pitch axis, and works as the displacement of the bar 242 of actuator 240While changing, resonance generator 200 produces resonance (referring to Fig. 8).
With reference to Fig. 7, the generator 200 that resonates is according to the preferred embodiment of the invention based on actuator 240Operation and produce resonance. That is to say, be kept with respect to blade B in actuator body 244Under the situation of pre-position, when the position of actuator rod 242 is with respect to actuator body 244And while changing up and down, produce resonance.
More particularly, the length of actuator rod 242 according to fluid by flow regulator 246 andBe fed the direction while entering actuator 240 and be can on the above-below direction of actuator body 244Become. At this moment, because actuator body 244 remains on unconverted phase for blade BIn position, so actuator rod 242 is made Linear-moving with respect to actuator body 244.
And actuator rod 242 can be introduced into actuating from flow regulator 246 according to fluidDirection when device 240 and actuator body 244 upsides and lower side-prominent identical length (referring toFig. 7), then carry out linear movement along the above-below direction of actuator body 244, to suppress weightThe linear reciprocal movement (referring to Fig. 8) of code (W).
The detailed structure of resonance generating means E will be explained below.
The detailed structure of department of assembly 100 is described with reference to Fig. 9 below. Fig. 9 is as basisThe department of assembly of one of parts of the resonance generating means E for blade testing fatigue of the present invention100 stereogram.
Department of assembly 100 be configured to play a supportive role in case the generator 200 that resonates by vibration force transmissionTo blade B. Department of assembly 100 comprises saddle 110 and assembled portion 120, and saddle 110 is by multiple partsForm and be connected to round the outside of blade B, assembled portion 120 is configured to by saddle110 exert pressure and blade B and saddle 110 are combined.
Department of assembly 100 can comprise following saddle 110 and following assembled portion 120: saddle 110Can comprise plural parts and with the external shape of blade B corresponding groove in form112; Assembled portion 120 is configured to by producing the pressure to internal action from the outside of saddle 110Saddle 110 is remained in the installation relation (mountedrelationship) with blade B.
Groove 112 in saddle 110 extends with the shape corresponding with the cross section of blade B, to make:When parts above and below parts be moved with near each other time, groove 112 is with blade B'sOuter surface enters Surface Contact state, therefore, power can be passed to leaf from resonance generating means ESheet B.
Assembled portion 120 is arranged at upside and the downside place of saddle 110. Assembled portion 120 is to canThe saddle 110 being made up of multiple parts provides pressure. In addition, assembled portion 120 limits saddle 110It is not vibrated along fore-and-aft direction or along left and right directions. For this reason, assembled portion 120 can compriseLeft and right limiting unit 116 and front and back limiting unit 117, left and right limiting unit 116 is used for limiting saddle 110Move left and right (in the time observing) in Fig. 9, front and back limiting unit 117 be used for limiting saddle 110 beforeRear movement. In addition, assembled portion 120 comprises the securing member 118 that is positioned at left side and right side, and these are fasteningPart is by fastening assembled portion 120 to saddle 110 and exert pressure.
Department of assembly 100 is constructed such that its center of gravity is positioned on pitch axis. That is to say, becauseThe center of gravity of department of assembly 100 (comprising saddle 110, assembled portion 120 and securing member 118) is positioned at pitchingOn axle, so in the time that blade B moves up and down due to resonance, can prevent side direction such as torsionLoad.
And assembled portion 120 can be formed by composite, to alleviate resonance generating means EWeight and increase rigidity.
The detailed structure of resonance generator 200 is described with reference to Figure 10 below.
Figure 10 is the master as the resonance generating means for blade testing fatigue according to the present inventionWant the detailed exploded perspective view of the resonance generator of parts. With reference to Figure 10, resonance generator 200 wrapsDraw together actuator 240, and be constructed such that due to being total to that the variable-length of actuator 240 producesThe power of shaking is passed via assembled portion 120, saddle 110 and blade B successively.
Therefore, resonance generator 200 and department of assembly 100 can connect each other in various modesThe resonance power producing according to the stretching, extension of the length of actuator 240 and contraction connects, as long as can be passedBe handed to blade B.
With reference to the structure of the embodiment shown in Figure 10, resonance generator 200 and actuator 240 phasesLinear reciprocal movement is made in associated ground on the outside of department of assembly 100. Resonance generator 200 comprises weightCode frame 220, actuator 240 and Linear guide 280. On counterweight frame 220, be provided with additional weightCode W. Actuator 240 is connected to a side of counterweight frame 220, for producing counterweight frame 220Linear reciprocal movement and will provide resonance to blade B. Linear guide 280 is configured to when causingWhen the length of moving device 240 stretches or shrinks (, in the time that actuator rod 242 moves)This Linear guide 280 guides the movement with respect to department of assembly 100 of counterweight frame 220.
Resonance generator 200 comprise such counterweight frame 220: this counterweight frame 220 with actuatorThe mode that the displacement of 240 actuator rod 242 is associated moves, wherein actuator body 244There is the phase place identical with the phase place of department of assembly 100.
Counterweight frame 220 is designed to improve the rigidity of structure. With reference to Figure 10, counterweight frame 220 canTo be hollow, and be configured to with the isolated mode in outside and the closed loop shape being closed. CauseMoving device 240 is housed inside in counterweight frame 220.
Additional weight W is arranged on the surface of counterweight frame 220, and additional weight WQuantity can increase or reduce along the longitudinal direction of blade B.
And counterweight frame 220 can be hollowed out along the horizontal direction of blade B, to will causeMoving device 240 holds in the inner.
Linear guide 280 is configured to guide counterweight frame 220 and actuator 240 to move explicitlyMoving, so that counterweight frame 220 is moved in the reciprocal mode of linearity along above-below direction. A realityExecute in example, Linear guide 280 is connected to connector 300.
That is to say, Linear guide 280 with the movement of the actuator rod 242 of actuator 240In the parallel direction of direction, guide the movement of counterweight frame 220, prevent simultaneously counterweight frame 220 with causeDirection that moving device 240 stretches and shrinks (, the linear reciprocal movement of actuator rod 242Direction) movement in crossing direction.
For this reason, Linear guide 280 comprises fixed part 286 and moving part 284, fixed part extraly286 are used for maintaining the same phase place with respect to blade B, and moving part 284 makes phase place with respect to blade BAnd change.
About fixed part 286 and moving part 284, can be implemented as various embodiment, as long asThese two parts 286,284 can guide weight according to the stretching, extension of the length of actuator 240 and contractionThe linear reciprocal movement of code frame 220 and counterweight W and simultaneously prevent from intersecting motion in directionCan.
And in one embodiment, joint 282 can be arranged at department of assembly 100 and resonanceBetween generator 200, and be connected with connector 300. Be the movement of elongate along above-below directionPortion 284 can through joint 282 and in the interior slip of fixed part 286, fixed part 286 be formed onThe flange 285 extending forward from joint 282.
Flange 285 can comprise and dig the hole 287 of wearing therein, for holding actuator rod 242,And the upper end of actuator rod 242 and bottom are connected to the upper surface of counterweight frame 220 insideAnd lower surface. For this reason, preferably hollowing out corresponding to counterweight frame 220 of the width of flange 285Part inner width or can be slightly smaller.
Flange 285 is set as each other across the distance corresponding with the height of actuator body 244. OneThe relative both sides of flange 285 are connected to upper surface and the lower surface of actuator body 244.
Therefore, in the time that actuator 240 operates to make actuator rod 242 to move, counterweight frame 220Move with respect to actuator body 244. Moving part 284 is done back and forth linear through fixed part 286Move, guide thus the linear reciprocal movement of counterweight frame 220.
Additional weight W is connected to the both sides of counterweight frame 220, and the quantity of additional weight can rootIncrease according to needs or reduce.
Flow regulator 246 is connected to actuator body 244, and is fixed on its position.
Below, with reference to Figure 11, the resonance generator 200 according to another embodiment is described. AlsoIn other words, Figure 11 illustrates the resonance generator 200 in another revision for execution example. Correspondingly,Figure 11 illustrates the resonance for blade testing fatigue in accordance with another embodiment of the present invention to occurThe exploded perspective view of the structure of device. Figure 11 illustrates especially and is guaranteeing that joint 282 has enoughIn the situation of rigidity, can revise the showing of syndeton of additional weight W and Linear guide 280Example.
That is to say, according to this embodiment, be provided with a single joint 282, and this joint282 are directly connected to department of assembly 100 and do not need connector 300. Fixed part 286 is connected toJoint 282, and be connected to counterweight frame 220 along the moving part 284 that vertical direction is elongateThe left side of dorsal part and right side.
The actuator 240 that is positioned at counterweight frame 220 is connected to the positive of joint 282 and is fixedThere, upper end and the bottom of actuator rod 242 are connected to the upper of counterweight frame 220 simultaneouslyEnd and bottom, to produce the movement of counterweight frame 220.
As mentioned above, fixed part 286 and moving part 284 can be modified in various modes,As long as counterweight frame 220 is made linear reciprocal movement in can be during the movement of actuator rod 242.
Figure 12 is the resonance generating means for blade testing fatigue according to an embodiment of the inventionIn the cross section of Linear guide, and Figure 13 is in accordance with another embodiment of the present invention for bladeThe cross section of the Linear guide in the resonance generating means of testing fatigue. Fixed part 286 and moving part284 each other complementary in shape, and they both can be formed various shapes and knotStructure, as long as fixed part 286 and moving part 284 can prevent that counterweight frame 220 is except above-below directionAll sides in addition move up.
In the situation that guaranteeing that joint 282 has enough rigidity, can omit connector 300, at thisIn the situation of kind, joint 282 can directly engage with assembled portion 120.
Below, explain according to the knot of the department of assembly 100 of another embodiment with reference to Figure 14Structure. Figure 14 illustrates according to an embodiment of the invention to send out for the resonance of blade testing fatigueThe stereogram of the structure of the department of assembly in generating apparatus.
With reference to Figure 14, department of assembly 100 can be to allow saddle 110 deviate to a side (lopsided)Mode and being fixed. That is to say, because the pitch axis of blade B is positioned at chord of blade (chord)Locate for about 1/4, so be installed on the resonance generator 200 on left side and the right side of department of assembly 100Weight ratio be based on distance apart from this pitch axis than and determined. Therefore, actuator 240Size and counterweight W are changeable.
This is normally disadvantageous in the design phase of resonance generating means, because in order to make left and right twoThe center of gravity of the resonance generator 200 of side is aimed at pitch axis and just will certainly be caused these two resonance to occurWeight difference between device 200 is apart from excessive. In order to alleviate above-mentioned shortcoming, assembled portion 120 can beOne side is lengthened out (referring to Figure 14), to therefore increase saddle 110 together between vibration generator 200Distance. By doing like this, can slow down from pitch axis to left side, resonate generator 200 with from bowingFace upward the range difference distance that axle resonates between generator 200 to right side.
Naturally, so just can saddle 110 be installed to such an extent that deviate to one with respect to assembled portion 120Side.
Block piece 119 is arranged on the end of assembled portion 120, to increase for homologue (,For resonance generator 200) compression stress. Block piece 119 can be connected to respect to assembled portionBetween vibration generator 200, there is together that a part of presumptive area engaging in 120 described end(, upper-side area, underside area, left field or right side area), so that restriction resonance occursThe even small movement of device 200 is (, probably due to the tolerance of the fixed component such as such as boltAnd the movement causing).
Below, illustrate for being total to for blade testing fatigue is installed with reference to Figure 15 and Figure 16The various embodiment of generating means shake.
With reference to Figure 15 and Figure 16, resonance generator is not only installed on the side surface of department of assembly 100200, and at upside and the downside of department of assembly 100, resonance generator 200 is also installed, so that edgeThe edge direction of blade B produces resonance.
Preferably, resonance generator 200 is placed in upside and the downside of department of assembly 100 like thisUpper, so that: in the time that the displacement of actuator rod 242 is " 0 ", the center of gravity of resonance generator 200Be positioned on pitch axis.
Can also be by combine four actuators 240 shown in Figure 15 in various modesOperation comes at the upper torsion that produces of blade (B). For example,, when the resonance being installed with relative to one another occursThe actuator rod 242 of device 200 is controlled so as to while making linear reciprocal movement in the opposite direction, at leafOn sheet (B), provide torsion.
Meanwhile, although having described resonance generator 200, Figure 16 can be arranged at department of assembly 100On left side and right side, but it is not limited to this. Therefore, resonance generator 200 also can be only byBe arranged on upside and downside, in this case, the direction at an edge along blade B producesResonance.
Below, with reference to Figure 17, the Linear guide according to another embodiment is described. Figure 17It is the line for the resonance generating means of blade testing fatigue in accordance with another embodiment of the present inventionThe sectional view of property guiding piece.
As described in above with reference to an embodiment, moving part 284 and fixed part 286 with except activateAll confined sides of movement in all directions beyond the direction of the linear reciprocal movement of device bar 242Formula and being connected. In one embodiment, Linear guide 280 can be positioned at through being mountedThe center of gravity of the additional weight (W) on two apparent surfaces of counterweight frame 220 and the straight line that extendsOn.
That is to say, when Linear guide 280 be not be positioned at through centered by actuator 240,And the center of gravity of the counterweight facing with each other in mode at a distance from each other (W) is extendedOn straight line time, the resonance producing according to the movement of counterweight (W) will produce along drawing with linearityThe power of the crossing direction of the linear reciprocal movement direction of guiding element 280, and will accelerate moving part 284Or the wearing and tearing of fixed part 286.
So in order to extend the life-span of Linear guide 280, structure is as shown in figure 17 preferred.
Below, illustrate and use the resonance that is constructed out as mentioned above to fill with reference to Figure 18Put the method for testing fatigue of (E).
Figure 18 is used for explanation use according to an embodiment of the invention for blade testing fatigueThe flow chart of the method for testing fatigue of resonance generating means.
Use according to the fatigue of the resonance generating means for blade testing fatigue of an embodiment and surveyMethod for testing comprises following sequenced action: department of assembly 100 is arranged on to the upper (step of blade (B)Rapid S100); Resonance generator 200 is arranged in a side of department of assembly 100 (step S200);By additional weight (W) be arranged on resonance generator a side on (step S300); And by causingMake actuator rod make linear reciprocal movement and therefore to cause counterweight frame corresponding with additional weight (W)Ground is mobile, in the upper resonance (step S400) that produces of blade (B).
During the action for department of assembly is installed (step S100), the center of gravity of department of assembly 100Be preferably placed on pitch axis. In the action (step S400) for generation of resonance, can basisThe resonance generator 200 of installing in step S200 and in step S300, install additionalThe quantity of counterweight (W) and their position, produce resonance in various modes.
For example, during the action (step S400) for generation of resonance in, when at blade (B)Lobe direction and the edge direction of blade (B) among while optionally having selected measurement direction, necessaryResonance generator 200 is arranged on the upper surface of department of assembly 100 and lower surface or left surface andOn right surface, and each actuator rod 242 must be controlled to do along same direction simultaneously linear pastReciprocating cutter.
When the described measurement direction in the action (step S400) for generation of resonance is not blade(B) lobe direction neither blade (B) edge direction time, must be by resonance generator 200Be arranged on all surface in the upper surface, lower surface, left surface, right surface of department of assembly 100,And each actuator rod 242 must be controlled to and make linearity along same direction simultaneously and back and forth move.
As another example, even if the generator 200 that ought resonate is only installed in department of assembly 100On upper surface and lower surface or while being only installed on the left surface of department of assembly 100 and right surface, stillSo can by by each facing to the direction of operating control of actuator rod 242 be rightaboutCarry out the testing fatigue about the distorting stress of blade (B).
In this case, at the action for counterweight is installed (step S300), preferably,Make Linear guide 280 be positioned at attached on two apparent surfaces through being installed in counterweight frame 220On the straight line that adds the center of gravity of counterweight (W) and extend.
Aforesaid exemplary embodiment and advantage are only exemplary, and should not be understood to intentionLimit these exemplary embodiments. The instruction of this technology can easily be applied to the dress of other typesPut. And the explanation of the exemplary embodiment of the present invention's design is only also illustrative, and notIt is the scope in order to limit claim.
Claims (17)
1. the resonance with maximization moving mass ratio for blade testing fatigue fillsPut, described resonance generating means comprises:
Department of assembly, described department of assembly comprises saddle and assembled portion, described saddle comprises and described bladeOuter surface corresponding groove in form, described assembled portion be arranged at described saddle outside andFastener fastening so that described saddle is exerted pressure to described blade;
Resonance generator, described resonance generator comprises actuator, counterweight frame and Linear guide,Described actuator is used for producing Linear-moving, and described actuator is contained in described weight by described counterweight frameCode frame in, described counterweight frame have can improve the closed-loop configuration of the rigidity of structure and with described actuatorThe displacement of actuator rod make explicitly linear reciprocal movement, described Linear guide is configured toIt is reciprocal that described in the time that described actuator rod is subjected to displacement, Linear guide guides the linearity of described counterweight frameMotion; And
Additional weight, described additional weight be installed in two apparent surfaces of described counterweight frame upper andMove explicitly with described counterweight frame, and the quantity of described additional weight is along described bladeLongitudinal direction and increase or reduce in making during the linear reciprocal movement of described counterweight frame and make to moveThe center of gravity of motion block is positioned on described actuator rod.
2. resonance generating means according to claim 1, wherein said Linear guide comprises:
Moving part, described moving part is configured to make explicitly Linear-moving with described actuator rod;With
Fixed part, described fixed part is configured to guide the moving direction of described moving part.
3. resonance generating means according to claim 1, wherein, when the position of described actuatorMove while being " 0 ", the center of gravity of described resonance generator is positioned on pitch axis.
4. according to the resonance generating means described in claim 1 or 3, wherein, described department of assemblyCenter of gravity is on pitch axis.
5. resonance generating means according to claim 2, wherein, described Linear guide existsIn the parallel direction of the direction that stretches or shrink with described actuator, guide moving of described counterweight frameMoving.
6. resonance generating means according to claim 2, wherein, described Linear guide is anti-Stop described counterweight frame moving in the crossing direction of the direction that stretches or shrink with described actuatorMoving.
7. resonance generating means according to claim 1, wherein, described counterweight frame is describedOpening wide in a lateral direction of blade.
8. resonance generating means according to claim 1, it also comprises block piece, described resistanceBlock piece is arranged between described department of assembly and described resonance generator, and when described resonance generatorWhile producing resonance, described block piece limits the movement of described department of assembly with respect to described resonance generator.
9. resonance generating means according to claim 1, wherein, described connector is by compoundMaterial forms.
10. resonance generating means according to claim 1, wherein, described saddle can beOn the longitudinal direction of described connector, be changed to another position and be fixed there.
11. resonance generating means according to claim 1, wherein, described resonance generatorAlso comprise the joint for the main body of described actuator is engaged with described assembled portion.
12. resonance generating means according to claim 2, wherein, described Linear guideBe positioned at the center of gravity of the described additional weight on two apparent surfaces through being installed in described counterweight frameAnd on the straight line extending.
13. 1 kinds of method for testing fatigue, it uses for having of blade testing fatigue and maximizes and moveThe resonance generating means of moving mass ratio, described method for testing fatigue comprises the steps:
On described blade, department of assembly is installed, described department of assembly comprises saddle and assembled portion, described saddleSeat comprises and the outer surface of described blade corresponding groove in form, and described assembled portion is arranged atThe outside of described saddle and fastener fastening to make described saddle apply pressure to described bladePower;
Resonance generator is installed in a side of described department of assembly, and described resonance generator comprises actuatingDevice, counterweight frame and Linear guide, described actuator is used for producing Linear-moving, described counterweight frameThe actuator body of described actuator and actuator rod are contained in described counterweight frame to described counterweightFrame have can improve the closed-loop configuration of the rigidity of structure and with the displacement of described actuator rod explicitlyMake linear reciprocal movement, described Linear guide is configured in the time that described actuator rod is subjected to displacementDescribed Linear guide guides the linear reciprocal movement of described counterweight frame;
In a side of described resonance generator, additional weight is installed, described additional weight is installed inTwo apparent surfaces of described counterweight frame go up and move explicitly with described counterweight frame, described additionalThe quantity of counterweight is along the longitudinal direction of described blade and increase or reduce to make at described counterweight frameLinear reciprocal movement during in the center of gravity of movable block is positioned on described actuator rod; And
By making the described actuator rod of described actuator make linear reciprocal movement and making thus described weightCode frame and described additional weight move, and produce resonance on described blade.
14. method for testing fatigue according to claim 13, wherein, install described department of assemblyStep comprise: described department of assembly is mounted to its center of gravity is positioned on pitch axis.
15. method for testing fatigue according to claim 13, wherein, install described additional weightThe step of code comprises: make described Linear guide be positioned at two through being installed in described counterweight frameCenter of gravity separately of described additional weight on apparent surface and on the straight line that extends.
16. method for testing fatigue according to claim 13, wherein, are producing described resonanceStep in, depend on the installation site of described resonance generator, the resonance producing is along useA direction between lobe direction and the edge direction of blade testing fatigue direction.
17. method for testing fatigue according to claim 16, wherein, produce described resonanceStep comprises: according to the moving direction of described actuator rod, produce along producing at described blade placeDescribed resonance direction bending or reverse.
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| Application Number | Priority Date | Filing Date | Title |
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| 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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| CN105593661A true CN105593661A (en) | 2016-05-18 |
| CN105593661B CN105593661B (en) | 2018-10-30 |
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