CN220270741U - Wind-powered electricity generation blade unipolar fatigue test device - Google Patents
Wind-powered electricity generation blade unipolar fatigue test device Download PDFInfo
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- CN220270741U CN220270741U CN202321837875.8U CN202321837875U CN220270741U CN 220270741 U CN220270741 U CN 220270741U CN 202321837875 U CN202321837875 U CN 202321837875U CN 220270741 U CN220270741 U CN 220270741U
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 34
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- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 230000033001 locomotion Effects 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 5
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 230000000274 adsorptive effect Effects 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 13
- 239000000306 component Substances 0.000 description 6
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- 230000008878 coupling Effects 0.000 description 3
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Abstract
The utility model discloses a wind power blade fatigue test device, and relates to the technical field of wind power blade fatigue test. The device comprises a base, a transition connecting part, a blade clamp and hydraulic excitation, wherein the base is fixedly arranged; the transition connecting component is detachably and fixedly connected with the base; the root of the blade is fixedly connected with the transition connecting part by bolts; the blade clamp is sleeved outside the blade; the blade clamp is connected with hydraulic excitation through the transmission assembly, and the hydraulic excitation drives the blade to realize reciprocating vibration; the blade clamp comprises a fatigue loading assembly and a clamping assembly, wherein the fatigue loading assembly is positioned at two sides of the clamping assembly and is connected with hydraulic excitation through a transmission assembly; the clamping component is sleeved with the connecting blade and connected with the fatigue loading component. According to the utility model, through the universal fixture device, the transmission assembly and the transitional connecting part of the blade root, the fixture device and the excitation device can move conveniently in the direction of the blade unfolding, so that the single-axis fatigue test efficiency of the wind power blade is improved, and the test cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of wind power blade fatigue test, and particularly relates to a wind power blade fatigue test device.
Background
In response to the national demand of dual-carbon strategy, the offshore wind energy industry and wind power technology are rapidly developed in recent years, and the wind power blade is used as a core component for capturing wind energy of a wind turbine generator, so that the high reliability of the design is a key for pushing the wind energy industry and the wind power technology to stand up and self-strengthen. The wind power blade is large-sized, flexible and personalized, the offshore wind turbine generator is gradually expanded to the deep sea, the service condition is more complicated and severe, the fatigue resistance characteristic requirement of the blade is obviously improved, the technical difficulty of the fatigue test corresponding to the blade is increased, and the fatigue test cost is obviously increased.
At present, related enterprises of wind power blades at home and abroad and third party certification authorities mainly adopt a single-shaft loading mode to carry out full-size structural fatigue test on the wind power blades, and utilize the same-frequency resonance principle to carry out excitation by adopting rotating mass or reciprocating mass, so that the blades vibrate in a reciprocating manner in the waving or array direction to generate a cyclic test load. The single-axis single-point fatigue test of the blade has long test period and low test precision, so that the requirement of the fatigue test of the large-scale flexible wind power blade cannot be met, and the single-axis multi-point fatigue test of the blade improves test load distribution by adjusting excitation positions and adding counterweight mass at a plurality of positions, so that test load in a critical area of the blade is close to target load, and becomes a mainstream technology of the fatigue test of the wind power blade.
In the single-shaft multipoint fatigue test process of the blade, because the excitation position and the counterweight mass are required to be continuously adjusted, the universality of the blade clamp along the blade extension direction is reduced due to the change of parameters such as an airfoil, a chord length, a torsion angle and the like in the blade extension direction, and the change of the section shape of the airfoil is difficult to adapt; the reciprocating mass type vibration excitation force position is relatively fixed, the vibration excitation force position of the vibration excitation platform is covered in a large area, the manufacturing cost is high, the vibration excitation force position adjustment time is long, and the fatigue test efficiency of the blade is reduced; the wind power blade has the advantages that the manufacturing cost of the blade fatigue test base is high due to the large blade weight and high blade root load, the updating period of the wind power blade is short, and the fatigue test cost can be further reduced by the universal blade root base.
Disclosure of Invention
The utility model aims to solve the technical problem of providing the wind power blade single-axis fatigue testing device, which realizes the convenient movement of the clamp device and the excitation device in the direction of the blade unfolding through the universal clamp device, the teeterboard transmission device and the blade root transitional connection part, improves the single-axis fatigue testing efficiency of the wind power blade, and reduces the testing cost.
In order to solve the technical problems, the utility model adopts the following technical scheme: a wind power blade single-shaft fatigue testing device comprises a base, a transition connecting part, a blade clamp and hydraulic excitation, wherein the base is fixedly arranged; the transition connecting component is detachably and fixedly connected with the base; the root of the blade is fixedly connected with the transition connecting part by adopting a bolt; the blade clamp is sleeved outside the blade; the blade clamp is connected with the hydraulic excitation through a transmission assembly, and the hydraulic excitation drives the blade to realize reciprocating vibration;
the blade clamp comprises a fatigue loading assembly and a clamping assembly, wherein the fatigue loading assembly is positioned at two sides of the clamping assembly and is connected with the hydraulic excitation through a transmission assembly; the clamping assembly is sleeved with the blade and connected with the fatigue loading assembly.
Preferably, the fatigue loading assembly comprises a fixed cylinder, a transverse plate, a guide rod, a balancing weight, a guide rail, a first supporting seat and a second supporting seat, wherein the fixed cylinder is fixedly connected to the transverse plate and connected with the transmission assembly, the transverse plate is horizontally arranged, two ends of the transverse plate are respectively connected with one guide rod, the other end of the guide rod penetrates through the first supporting seat and then is connected with the balancing weight, two sides of the balancing weight are respectively and slidably connected with the guide rail, the upper end and the lower end of the guide rail are respectively and fixedly connected with the first supporting seat and the second supporting seat, and the first supporting seat and the second supporting seat are fixedly connected to an outer frame of the blade clamp; the clamping assemblies are fixedly connected between the two balancing weights, and the two balancing weights drive the clamping assemblies to do linear reciprocating motion along the direction of the guide rail.
Preferably, the clamping assembly comprises a threaded rod, a sucker, a flexible plate, a winding drum, a third supporting seat and a fourth supporting seat, wherein the third supporting seat and the fourth supporting seat are respectively positioned on two opposite sides of the blade, a plurality of threaded rods are arranged on the third supporting seat and the fourth supporting seat, one end of each threaded rod is connected with the third supporting seat or the fourth supporting seat, the other end of each threaded rod is fixedly connected with one sucker, the sucker is in adsorptive connection with the flexible plate, the flexible plate is coated on the outer surface of the blade, and the winding drum is fixedly connected with the outer frame of the blade clamp and is connected with the flexible plate.
Preferably, the transmission assembly comprises a fixed rod, a sleeve, a rolling part, a first sliding rod, a second sliding rod and a sliding rail, wherein the fixed rod is matched and connected with the fixed cylinder and fixedly connected with the sleeve, the sleeve is matched with the rolling part to form a revolute pair and moves in a sliding groove in the first sliding rod, the first sliding rod is in sliding connection with the second sliding rod through the sliding rail, and the second sliding rod is rotationally connected with the supporting assembly.
Preferably, the support assembly comprises a cylindrical bolt, a first upright post and a second upright post, a plurality of cylindrical holes are formed in the first upright post and the second upright post from top to bottom, the cylindrical bolt is sleeved and connected in the cylindrical holes, the first upright post and the second upright post are arranged on two sides of the second slide bar, the second slide bar is rotationally connected with the first upright post and the second upright post through the cylindrical bolt, and the blade clamp and the hydraulic excitation are respectively arranged on two sides of the first upright post and the second upright post
Preferably, the transition connecting component comprises a fastening screw, a connecting seat and a connecting internal threaded hole, one end of the connecting seat is connected with the base through the fastening screw, the connecting internal threaded hole is formed in the other end of the connecting seat, and a bolt at the root of the blade is screwed with the connecting internal threaded hole, so that the root of the blade is connected with the connecting seat.
Preferably, the base comprises a concrete foundation, a concrete bearing platform, supporting frames, auxiliary platforms and fixing seats, wherein the concrete bearing platform is vertically arranged on the concrete foundation, the fixing seats are arranged inside the concrete bearing platform, the fixing seats are connected with the transition connecting parts through fastening screws, the auxiliary platforms are arranged on two sides of the root parts of the blades, and the supporting frames are arranged on two sides of the concrete bearing platform.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in:
(1) According to the utility model, through the use of the transition connecting parts with different types, the blade root fixing of the fatigue test on different blades can be realized, so that the cost of replacing different bases for the fatigue test on different blades in the traditional test is reduced.
(2) According to the utility model, the threaded rod is matched with the sucker and the flexible plate, so that the fastening of various types of blades is realized, the problem that different blade clamps are required for fixing the traditional different types of blades is solved, and the universality of the blade clamps is realized.
(3) According to the utility model, through the design of the transition connecting component, the blade clamp and the loading component, single-point and multi-point fatigue test tests of wind power blades with various specifications and models can be met.
(4) The utility model can well realize the fatigue test of different airfoil sections of different types of blades by utilizing the elasticity of the transmission assembly.
(5) The utility model can well realize the height adjustment of the loading part by utilizing the ductility of the supporting component, and improves the universality of the loading device.
Drawings
FIG. 1 is a schematic view of the overall structure of the present utility model;
FIG. 2 is a schematic structural view of a blade clamp;
FIG. 3 is a schematic side elevational view of the clamping assembly;
FIG. 4 is a schematic view of the cross-sectional structure A-A of FIG. 3;
FIG. 5 is a schematic structural view of a transmission assembly;
FIG. 6 is a schematic structural view of the base;
fig. 7 is a schematic structural view of a transition piece.
In the figure: 1. a base; 2. a transitional connecting component; 3. a blade; 4. a blade clamp; 5. a fatigue loading assembly; 6. hydraulically exciting; 7. a fixed cylinder; 8. a cross plate; 9. a guide rod; 10. a first support base; 11. a second support base; 12. balancing weight; 13. a guide rail; 14. a threaded rod; 15. a suction cup; 16. a flexible board; 17. a third support base; 18. a fourth support base; 19. a reel; 20. a fixed rod; 21. a sleeve; 22. a rolling member; 23. a first slide bar; 24. a slide rail; 25. a second slide bar; 26. a cylindrical bolt; 27. a first upright; 28. a second upright; 29. a support frame; 30. a concrete bearing platform; 31. a fixing seat; 32. an auxiliary platform; 33. a concrete foundation; 34. fastening a screw; 35. a connecting seat; 36. and connecting the internal threaded holes.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
As shown in fig. 1, a wind power blade uniaxial fatigue testing device of a preferred embodiment is provided, which comprises: the device comprises a base 1, a transition connecting part 2, a blade 3, a blade clamp 4 and a fatigue loading assembly 5, wherein the base 1 is fixedly arranged; the transition connecting part 2 is fixedly connected with the base 1; the root of the blade 3 is fixedly connected with the transition connecting part 2 by bolts; the blade clamp 4 adopts a truss structure to form a clamping assembly to be fixed on the blade 3, and the shape of the clamp is adjusted through parts such as a sucker 15, a flexible plate 16, a threaded rod 14 and the like, so that the blade clamp is suitable for the change of the section shape of the spanwise airfoil; the fatigue loading assembly 5 transmits hydraulic excitation through a teeterboard type transmission assembly to drive the balancing weight 12 to do linear reciprocating motion, so that the blade 3 generates reciprocating vibration in the waving or shimmy direction; the counterweight part is fixed on the blade 3 by a grip assembly, improving the test load distribution.
In this embodiment, when the second slide rod 25 is excited upwards by the hydraulic excitation 6, the fixing rod 20 drives the fixing cylinder 7 to move downwards, so as to push the transverse plate 8 and the guide rod 9 to move downwards, thereby realizing the downward movement of the balancing weight 12 and finally realizing the movement of the blade 3 in the flapping direction. When the hydraulic excitation 6 gives continuous periodic excitation, the balancing weight 12 is caused to do reciprocating linear motion in the guide rail 13, so that the blade 3 is driven to do reciprocating linear motion in the waving direction, and fatigue loading is realized through a resonance principle.
Specifically, as shown in fig. 6, the base 1 includes a concrete foundation 33, a concrete platform 30, a support 29, an auxiliary platform 32, and a fixing base 31. Auxiliary platforms 32 are provided on both sides of the root of the blade 3, and the auxiliary platforms 32 are movable in a vertical plane for assisting in bolting construction and maintenance work of the blade root. The fixing seat 31 is arranged in the vertical concrete bearing platform 30 and is screwed with the fastening screw 34 in the transition connecting part 2, and the supporting frames 29 are arranged on two sides of the concrete bearing platform 30 to strengthen the strength of the integral base 1 and improve the reliability of the device.
As shown in fig. 7, the transitional coupling member 2 includes a fastening screw 34, a coupling seat 35, and a coupling female screw hole 36. The fastening screw 34 is fixedly connected with the fixed seat 31 in the base 1 in a matched manner, the other end of the fastening screw is fixedly connected with the connecting seat 35 in a matched manner, and the connecting internal threaded hole 36 is formed in the other end of the connecting seat 35 and is connected with the blade root of the blade 3 through a bolt.
The blade clamp 4 comprises a fatigue loading assembly and a clamping assembly. As shown in fig. 2 to 4, the fatigue loading assembly includes a fixed cylinder 7, a cross plate 8, a guide rod 9, a first support base 10, a second support base 11, a weight 12, and a guide rail 13. The fixed cylinder 7 is fixedly connected with the fixed rod 20 through pins, the guide rods 9 and the balancing weights 12 are symmetrically distributed on two sides of the blade clamp, the purpose of the fixed cylinder is to keep balance when a load is applied to the blade, and the whole device can be balanced when the blade clamp 4 and the blade 3 resonate. In addition, a clamping assembly is formed by a threaded rod 14, a sucking disc 15, a flexible plate 16, a third supporting seat 17, a fourth supporting seat 18 and a winding drum 19, the flexible plate 16 is coated on the surface of the blade 3, and the flexible plate 16 is scaled by adjusting the positions of the threaded rod 14 on the third supporting seat 17 and the fourth supporting seat 18; the sucker 15 is adsorbed on the surface of the flexible board 16 under the action of pressure difference, so that the purpose of connecting the threaded rod 14 and the flexible board 16 is achieved, and the flexible board 16 is prevented from moving in the test process, and the effect of restraining the flexible board 16 is achieved; the beneficial effect of the reel 19 is that when the blade clamp 4 moves on the blade 3, the movement adjustment of the blade clamp 4 can be realized by adjusting the tension and the release of the reel 19 to the flexible plate 16, so that the optimal position of the blade clamp 4 on the blade 3 is found in the test.
As shown in fig. 5, the transmission assembly includes a fixed rod 20, a sleeve 21, a rolling member 22, a first slide rod 23, a slide rail 24, and a second slide rod 25. The blade anchor clamps 4 and the hydraulic excitation 6 are connected respectively at drive assembly's both ends, and second slide bar 25 passes through cylindrical bolt 26 with first stand 27, second stand 28 and forms the revolute pair and be connected, and first slide bar 23 can realize extending effect through slide rail 24, makes fatigue loading subassembly 5's commonality improve greatly, and is more convenient in practical application to overcome traditional test device's drawback, reach the purpose of saving the cost.
The support assembly includes a cylindrical peg 26, a first post 27, and a second post 28, as shown in fig. 5. The function of the cylindrical bolt 26 is to connect the transmission assembly with the first upright post 27 and the second upright post 28, the two upright posts are provided with cylindrical holes with different heights, the cylindrical bolt 26 is sleeved in the cylindrical holes, and the height of the transmission assembly can be changed, so that the height of the blade clamp is changed, and fatigue loading of different types of blade fatigue tests is realized.
The present utility model is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present utility model and the inventive concept thereof, can be replaced or changed within the scope of the present utility model.
Claims (7)
1. The wind power blade single-shaft fatigue testing device is characterized by comprising a base, a transition connecting part, a blade clamp and hydraulic excitation, wherein the base is fixedly arranged; the transition connecting component is detachably and fixedly connected with the base; the root of the blade is fixedly connected with the transition connecting part by adopting a bolt; the blade clamp is sleeved outside the blade; the blade clamp is connected with the hydraulic excitation through a transmission assembly, and the hydraulic excitation drives the blade to realize reciprocating vibration;
the blade clamp comprises a fatigue loading assembly and a clamping assembly, wherein the fatigue loading assembly is positioned at two sides of the clamping assembly and is connected with the hydraulic excitation through a transmission assembly; the clamping assembly is sleeved with the blade and connected with the fatigue loading assembly.
2. The wind power blade single-shaft fatigue testing device according to claim 1, wherein the fatigue loading assembly comprises a fixed cylinder, a transverse plate, a guide rod, a balancing weight, a guide rail, a first supporting seat and a second supporting seat, wherein the fixed cylinder is fixedly connected to the transverse plate and is connected with the transmission assembly, the transverse plate is horizontally arranged, two ends of the transverse plate are respectively connected with the guide rod, the other end of the guide rod penetrates through the first supporting seat and then is connected with the balancing weight, two sides of the balancing weight are respectively and slidably connected with the guide rail, the upper end and the lower end of the guide rail are respectively and fixedly connected with the first supporting seat and the second supporting seat, and the first supporting seat and the second supporting seat are fixedly connected to an outer frame of the blade clamp; the clamping assemblies are fixedly connected between the two balancing weights, and the two balancing weights drive the clamping assemblies to do linear reciprocating motion along the direction of the guide rail.
3. The wind power blade single-shaft fatigue testing device according to claim 2, wherein the clamping assembly comprises a threaded rod, a sucker, a flexible plate, a winding drum, a third supporting seat and a fourth supporting seat, the third supporting seat and the fourth supporting seat are respectively positioned on two opposite sides of the blade, a plurality of threaded rods are respectively arranged on the third supporting seat and the fourth supporting seat, one end of each threaded rod is connected with the third supporting seat or the fourth supporting seat, the other end of each threaded rod is fixedly connected with one sucker, the sucker is in adsorptive connection with the flexible plate, the flexible plate is wrapped on the outer surface of the blade, and the winding drum is fixedly connected with the outer frame of the blade clamp and is connected with the flexible plate.
4. The wind power blade single-shaft fatigue testing device according to claim 2, wherein the transmission assembly comprises a fixed rod, a sleeve, a rolling element, a first sliding rod, a second sliding rod and a sliding rail, the fixed rod is matched and connected with the fixed cylinder and fixedly connected with the sleeve, the sleeve is matched and formed into a revolute pair with the rolling element and moves in a sliding groove in the first sliding rod, the first sliding rod is in sliding connection with the second sliding rod through the sliding rail, and the second sliding rod is rotationally connected with the supporting assembly.
5. The wind power blade single-shaft fatigue testing device according to claim 4, wherein the supporting component comprises a cylindrical bolt, a first upright post and a second upright post, a plurality of cylindrical holes are formed in the first upright post and the second upright post from top to bottom, the cylindrical bolt is sleeved and connected in the cylindrical holes, the first upright post and the second upright post are arranged on two sides of the second sliding rod, the second sliding rod is rotationally connected with the first upright post and the second upright post through the cylindrical bolt, and the blade clamp and the hydraulic excitation are respectively arranged on two sides of the first upright post and the second upright post.
6. The wind power blade uniaxial fatigue testing device according to claim 1, wherein the transitional connecting component comprises a fastening screw, a connecting seat and a connecting internal threaded hole, one end of the connecting seat is connected with the base through the fastening screw, the connecting internal threaded hole is formed in the other end of the connecting seat, and a bolt at the root of the blade is screwed with the connecting internal threaded hole, so that the root of the blade is connected with the connecting seat.
7. The wind power blade single-shaft fatigue testing device according to claim 6, wherein the base comprises a concrete foundation, a concrete bearing platform, supporting frames, auxiliary platforms and fixing seats, wherein the concrete bearing platform is vertically arranged on the concrete foundation, the fixing seats are arranged in the concrete bearing platform, the fixing seats are connected with the transition connecting components through fastening screws, the auxiliary platforms are arranged on two sides of the root of the blade, and the supporting frames are arranged on two sides of the concrete bearing platform.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321837875.8U CN220270741U (en) | 2023-07-13 | 2023-07-13 | Wind-powered electricity generation blade unipolar fatigue test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321837875.8U CN220270741U (en) | 2023-07-13 | 2023-07-13 | Wind-powered electricity generation blade unipolar fatigue test device |
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| CN220270741U true CN220270741U (en) | 2023-12-29 |
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| CN202321837875.8U Active CN220270741U (en) | 2023-07-13 | 2023-07-13 | Wind-powered electricity generation blade unipolar fatigue test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118408812A (en) * | 2024-07-02 | 2024-07-30 | 江苏寅昊智能装备有限公司 | New forms of energy wind-powered electricity generation blade detection device |
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2023
- 2023-07-13 CN CN202321837875.8U patent/CN220270741U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118408812A (en) * | 2024-07-02 | 2024-07-30 | 江苏寅昊智能装备有限公司 | New forms of energy wind-powered electricity generation blade detection device |
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