CN104807630A - H-shaped vertical axis wind turbine blade static force structure test device and method - Google Patents
H-shaped vertical axis wind turbine blade static force structure test device and method Download PDFInfo
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- CN104807630A CN104807630A CN201510242587.1A CN201510242587A CN104807630A CN 104807630 A CN104807630 A CN 104807630A CN 201510242587 A CN201510242587 A CN 201510242587A CN 104807630 A CN104807630 A CN 104807630A
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Abstract
The invention relates to an H-shaped vertical axis wind turbine blade static force structure test device and a method. The device comprises a supporting seat component, a loading hoop, a distribution beam, a connecting component, a force sensor, a displacement sensor and a strain gauge. During a test, the length L of the distribution beam is adjusted and the position B of the loading hoop is loaded, so the actual bending moment distribution of a blade under various work conditions can be simulated; the supporting seat component is adjusted and the structural form of the loading hoop is loaded, so the stress state of the blade under axial torque and multiple angles of attack can be simulated. The deformation and the strain distribution of the blade under a loading condition can be measured, so that the structural performance of the blade can be assessed. The invention applies an external load to the device, the combined loading forms of bending, torqueing and having multiple angles of attack of the blade can be realized, the operation is simple and convenient, the result is accurate and reliable, and the universality is stronger.
Description
Technical field
The present invention relates to a kind of static construction test unit, especially a kind of large-scale H type vane of vertical shaft wind-driven generator static construction test unit and method.
Background technology
The wind wheel apparatus of large-scale H type vertical axis windmill is made up of blade, support and main shaft, and support is used for connecting blade and main shaft, and to form the large-scale H type framed structure with certain rigidity, common framed structure has single-side stand type and two kinds, double bracket type.Blade is the critical component of aerogenerator, being related to the security of operation of whole unit and stablizing, for guaranteeing blade static load load-bearing capacity and intensity, needing to carry out finite element analysis to blade, measuring the structural behaviour of blade under all kinds of operating mode.In actual motion, the stressing conditions more complicated of blade, wind load and inertial load make blade bear the multiple stress forms such as bending, torsion, and blade has certain angle of attack, makes the Structural Performance Analysis of blade more difficult like this.Therefore, how there are better apparatus and method to carry out static construction test to large-scale H type vane of vertical shaft wind-driven generator, urgently to be resolved hurrily.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of large-scale H type vane of vertical shaft wind-driven generator static construction test unit and method, only an external load is applied to device, just bending blade, torsion, many angles of attack combination loading form can be realized, simple to operation, result accurately and reliably, has stronger universality.
The technical scheme that the present invention adopts for its technical matters of solution is:
A kind of H type blade of vertical axis wind turbine finite element analysis device, comprise support part, load anchor ear, distribution beam, link, force snesor, displacement transducer and foil gauge, it is characterized in that, at least one described support part is fixedly installed on basis or ground, described support part comprises the fixed pedestal, support carriers and the bearing anchor ear that are installed together successively from top to bottom, for support blade and the adjusting vane angle of attack; The blade of a distance, each support part both sides overlapping and loads anchor ear a pair, for determining load(ing) point, controlling blade twist angle and the angle of attack; With link, loading anchor ear is connected with distribution beam two ends, in the middle part of distribution beam, applies external load, for transmitting and distribute loads; At external load application point installing force sensor, at loading anchor ear position and/or other installation position, axis of runner blade position displacement sensors, arrange foil gauge in axis of runner blade direction.
Preferably, described bearing anchor ear combines by fixing outer shroud and rotating inner ring, described fixing outer shroud is fixedly connected with support carriers, described rotation inner ring fixedly entangles blade makes the two rotate together, needed for blade, the angle of attack regulates inner ring angle, can provide the angle of attack under operating mode needed for blade after inner and outer ring locking.Wherein, the mode that inner ring fixedly entangles blade is: first by the fastening blade of conformal anchor ear, then use fixture fixed clamp, is being rotated in inner ring by clamp by fixed pin.
Preferably, described loading hooping structure is designed to: the fastening blade of conformal anchor ear, upper and lower flange is welded in two sides, flange designs multiple lifting hole(eyelet) (having different eccentric throws apart from the blade centre of shear), lifting hole(eyelet) place connects distribution beam by link, realizes blade bias reverse and the loading of many angles of attack according to flange and lifting hole(eyelet) position.
Preferably, the setting of described distribution beam changes with bearing number: during single support, arrange a distribution beam, plus load is born at middle part, and the two ends of distance load(ing) point certain distance connect loading anchor ear respectively; During double support, arrange an one-level distribution beam and two secondary distribution beams, bear plus load in the middle part of one-level distribution beam, secondary distribution beam two ends connect loading anchor ear, and one-level distribution beam two ends are connected with link with in the middle part of two secondary distribution beams.
H type blade of vertical axis wind turbine static construction test unit of the present invention, during test, applies pulling force in the middle part of distribution beam, and utilizes the power of distribution beam split length and load anchor ear position, the actual Bending moment distribution of approximate simulation blade under all kinds of operating mode; Meanwhile, the bearing anchor ear anglec of rotation, loading anchor ear eccentric throw make the blade with certain angle of attack produce torsion.So only input a drag load, just can realize bending blade, torsion, many angles of attack combination loading form.By load, distortion and Strain Distribution, the structural behaviour of blade under static load can be assessed.
According to a further aspect in the invention, additionally provide and a kind ofly utilize large-scale H type vane of vertical shaft wind-driven generator static construction test unit of the present invention to carry out the method tested, it is characterized in that, described method comprises the steps:
SS1. the Bending moment distribution loaded needed for blade, determines support part position, loading arm B
i, B
jand L
x, L
ylength, wherein, B
i, B
jbe the distance between a pair loading anchor ear and support part, L
x, L
yfor the distance in the middle part of distribution beam between load(ing) point and two ends;
SS2. support part is fixedly installed on base or ground, comprise the fixed pedestal, support carriers and the bearing anchor ear that are installed together successively from top to bottom, the rotation inner ring of bearing anchor ear entangles blade, according to the attack angle of blade size adjustment inner ring angle of required test, is tightened by bolts inner and outer ring;
SS3. B is respectively at distance support part left and right sides
i, B
jon the blade at place, cover loads anchor ear a pair, selects the lifting hole(eyelet) position of suitable eccentric throw, be connected by lifting hole(eyelet) with link with distribution beam end according to required windup-degree size;
SS4. when device is double support type, add two secondary distribution beams, be connected to one-level distribution beam and load between anchor ear, for secondary transmission and distribute loads;
SS5. external load is applied to load(ing) point in the middle part of distribution beam, can method be adopted according to field condition: utilize crane to apply to upper pulling force, or utilize suspension weight mode to apply downward pulling force;
SS6. the gross load of force sensor measuring blade is utilized, recycling distribution beam length ratio L
x, L
ycalculate the pulling force acted on each loading anchor ear, finally calculate the Bending moment distribution of blade; Equally, according to the bearing anchor ear anglec of rotation, load anchor ear eccentric throw and pulling force, windup-degree and torsional moment can be calculated; Displacement sensor blade is utilized to distribute along the distortion of axis under loading conditions; Utilize foil gauge, measure the Strain Distribution of blade;
SS7. according to the load of blade, distortion and Strain Distribution, position and the strain level in the crucial cross section of vane stress is determined, and then assessment blade construction performance.
Relative to prior art, the invention has the advantages that, only apply an external load to device, just can realize bending blade, torsion, many angles of attack combination loading form, simple to operation, result accurately and reliably, has stronger universality.
Accompanying drawing explanation
Fig. 1 is H type blade of vertical axis wind turbine finite element analysis device schematic diagram of the present invention;
Fig. 2 is support part schematic diagram of the present invention, and wherein, (A) is support part device composition diagram, and (B) does not lock schematic diagram for bearing anchor ear inner ring, and (C) is bearing anchor ear inner ring locking schematic diagram;
Fig. 3 is for loading anchor ear schematic diagram, wherein, (A) for blade without the angle of attack without moment of torsion schematic diagram, (B) has the angle of attack without moment of torsion schematic diagram for blade, (C) for blade has moment of torsion schematic diagram without the angle of attack, (D) has the angle of attack to have moment of torsion schematic diagram for blade.
Embodiment
For making object of the present invention, technical scheme and advantage clearly understand, to develop simultaneously embodiment referring to accompanying drawing, the present invention is described in more detail.
For double support blade, as shown in Figure 1, H type blade of vertical axis wind turbine finite element analysis device of the present invention, comprises support part 1, loading anchor ear 2, one-level distribution beam 3, two secondary distribution beams 4, link 5 (being preferably lifting rope or hinge), force snesor 6, displacement transducer and foil gauge.The Bending moment distribution loaded needed for blade, determines support part 1 position, loads the length of anchor ear 2 position and one-level distribution beam 3, secondary distribution beam 4, specifically comprise: load the distance B between anchor ear 2 and support part 1
1, B
2and B
3, B
4, the distance L in the middle part of secondary distribution beam 4 between load(ing) point and two ends
21, L
22and L
23, L
24, the distance L in the middle part of one-level distribution beam 3 between load(ing) point and two ends
11, L
12.
With reference to Fig. 2, support part 1 is fixedly installed on basis or ground, comprises the fixed pedestal 7, support carriers 8 and the bearing anchor ear 9 that are installed together successively from top to bottom, for support blade and the adjusting vane angle of attack.Bearing anchor ear 9 is combined by fixing outer shroud 10 and rotation inner ring 11, and outer shroud 10 is fixedly connected with support carriers 8, and inner ring 11 fixedly entangles blade makes the two rotate together.Wherein, the mode that inner ring 11 fixedly entangles blade is: first by the fastening blade of conformal anchor ear 12, then use fixture 13 fixed clamp, be fastened in inner ring 11 by fixture 13 by fixed pin 14.Attack angle of blade needed for operating condition of test, rotates inner ring 11 to required angle, locks outer shroud 10 and inner ring 11 with bolt 15.
With reference to Fig. 3, at B
1, B
2and B
3, B
4on the blade at place, each one, cover loads anchor ear 2, for determining load(ing) point, controls blade twist angle and the angle of attack.Loading anchor ear 2 structural design is: the fastening blade of conformal anchor ear 12, and upper and lower flange 16 is welded in two sides, flange 16 designs multiple lifting hole(eyelet) 17 (having different eccentric distance es apart from the blade centre of shear).According to whether reversing loading, selecting the lifting hole(eyelet) 17 with suitable eccentric distance e, connecting the two ends of lifting hole(eyelet) 17 and secondary distribution beam 4 with lifting rope (or hinge) 5.
With reference to Fig. 1, be connected in the middle part of secondary distribution beam 4 with one-level distribution beam 3 two ends with link 5, for transmitting and distribute loads.In the middle part of one-level distribution beam 3, apply external load, crane can be utilized to apply to upper pulling force according to field condition, or utilize suspension weight mode to apply downward pulling force.At external load application point installing force sensor 6, at loading anchor ear position or other installation position, axis of runner blade position displacement sensors, arrange foil gauge in axis of runner blade direction.
Force snesor 6 is utilized to measure the gross load of blade, recycling distribution beam length ratio L
21, L
22, L
23, L
24and L
11, L
12calculate the pulling force acted on each loading anchor ear 2, finally calculate the Bending moment distribution of blade; Equally, according to bearing anchor ear 9 anglec of rotation, load anchor ear 2 eccentric distance e and pulling force, windup-degree and torsional moment T can be calculated.Displacement sensor blade is utilized to distribute along the distortion of axis under loading conditions.Utilize foil gauge, measure the Strain Distribution of blade.According to the load of blade, distortion and Strain Distribution, determine position and the strain level in the crucial cross section of vane stress, and then assessment blade construction performance.
This test unit and method are also applicable to the large-scale H type vertical axis aerogenerator composite material blade finite element analysis of single support, and now, device only has a support part 1, two to load anchor ear 2 and a distribution beam 3.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of the present invention.
Claims (5)
1. a H type blade of vertical axis wind turbine finite element analysis device, comprise support part, load anchor ear, distribution beam, link, force snesor, displacement transducer and foil gauge, it is characterized in that, at least one described support part is fixedly installed on basis or ground, described support part comprises the fixed pedestal, support carriers and the bearing anchor ear that are installed together successively from top to bottom, for support blade and the adjusting vane angle of attack; The blade of a distance, each support part both sides overlapping and loads anchor ear a pair, for determining load(ing) point, controlling blade twist angle and the angle of attack; With link, loading anchor ear is connected with distribution beam two ends, in the middle part of distribution beam, applies external load, for transmitting and distribute loads; At external load application point installing force sensor, at loading anchor ear position or other installation position, axis of runner blade position displacement sensors, arrange foil gauge in axis of runner blade direction.
2. blade construction static test device according to claim 1, it is characterized in that, described bearing anchor ear combines by fixing outer shroud and rotating inner ring, fixing outer shroud is fixedly connected with support carriers, rotation inner ring fixedly entangles blade makes the two rotate together, needed for blade, the angle of attack regulates inner ring angle, can provide the angle of attack under operating mode needed for blade after inner and outer ring locking.
3. blade construction static test device according to claim 1, is characterized in that, the fixed form of described rotation inner ring and blade is: first by the fastening blade of conformal anchor ear, then use fixture fixed clamp, is being rotated in inner ring by clamp by fixed pin.
4. blade construction static test device according to claim 1, it is characterized in that, described loading hooping structure is: the fastening blade of conformal anchor ear, upper and lower flange is welded in two sides, flange designs multiple lifting hole(eyelet) (having different eccentric throws apart from the blade centre of shear), lifting hole(eyelet) place connects distribution beam by link, realizes blade bias reverse and the loading of many angles of attack according to flange and lifting hole(eyelet) position.
5. blade construction static test device according to claim 1, it is characterized in that, the setting of described distribution beam changes with bearing number: during single support, a distribution beam is set, plus load is born at the middle part of this distribution beam, and the two ends of distance load(ing) point certain distance connect loading anchor ear respectively; During double support, arrange an one-level distribution beam and two secondary distribution beams, bear plus load in the middle part of one-level distribution beam, secondary distribution beam two ends connect loading anchor ear, and one-level distribution beam two ends are connected with link with in the middle part of two secondary distribution beams.6, utilize the blade construction static test device described in claim 1 to 5 to carry out the method tested, it is characterized in that, described method comprises the steps:
SS1. the Bending moment distribution loaded needed for blade, determines support part position, loading arm B
i, B
jand L
x, L
ylength, B
i, B
jbe the distance between a pair loading anchor ear and support part, L
x, L
yfor the distance in the middle part of distribution beam between load(ing) point and two ends;
SS2. support part is fixedly installed on base or ground, comprise the fixed pedestal, support carriers and the bearing anchor ear that are installed together successively from top to bottom, the rotation inner ring of bearing anchor ear entangles blade, according to the attack angle of blade size adjustment inner ring angle of required test, is tightened by bolts inner and outer ring;
SS3. B is respectively at distance support part left and right sides
i, B
jon the blade at place, cover loads anchor ear a pair, selects the lifting hole(eyelet) position of suitable eccentric throw, be connected by lifting hole(eyelet) with link with distribution beam end according to required windup-degree size;
SS4. when device is double support type, add two secondary distribution beams, be connected to one-level distribution beam and load between anchor ear, for secondary transmission and distribute loads;
SS5. apply external load to load(ing) point in the middle part of distribution beam, method comprises: utilize crane to apply to upper pulling force, or utilizes suspension weight mode to apply downward pulling force;
SS6. the gross load of force sensor measuring blade is utilized, recycling distribution beam length ratio L
x, L
ycalculate the pulling force acted on each loading anchor ear, finally calculate the Bending moment distribution of blade; Equally, according to the bearing anchor ear anglec of rotation, load anchor ear eccentric throw and pulling force, windup-degree and torsional moment can be calculated; Displacement sensor blade is utilized to distribute along the distortion of axis under loading conditions; Utilize foil gauge, measure the Strain Distribution of blade;
SS7. according to the load of blade, distortion and Strain Distribution, position and the strain level in the crucial cross section of vane stress is determined, and then assessment blade construction performance.
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|---|---|---|---|
| CN201510242587.1A CN104807630B (en) | 2015-05-13 | 2015-05-13 | A kind of H types blade of vertical axis wind turbine static construction experimental rig and method |
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| CN106441903B (en) * | 2016-09-28 | 2018-06-12 | 内蒙古工业大学 | A kind of trunnion axis wind machine's laminae made from composite material study dynamic properties device |
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| CN111795899A (en) * | 2020-07-30 | 2020-10-20 | 上海电气风电集团股份有限公司 | Torsion loading equipment and blade torsion testing method |
| CN112710551A (en) * | 2020-11-20 | 2021-04-27 | 惠阳航空螺旋桨有限责任公司 | Composite material blade static strength test device |
| CN112796957A (en) * | 2021-03-26 | 2021-05-14 | 厦门理工学院 | Method, device and equipment for detecting fan blade |
| CN114199500A (en) * | 2021-07-14 | 2022-03-18 | 南京工业大学 | Large wind turbine blade full-size simulation wind force loading test system |
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