CN215004237U - Wind-powered electricity generation blade fatigue test loading device - Google Patents
Wind-powered electricity generation blade fatigue test loading device Download PDFInfo
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- CN215004237U CN215004237U CN202121014802.XU CN202121014802U CN215004237U CN 215004237 U CN215004237 U CN 215004237U CN 202121014802 U CN202121014802 U CN 202121014802U CN 215004237 U CN215004237 U CN 215004237U
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Abstract
The utility model discloses a wind-powered electricity generation blade fatigue test loading device belongs to wind-powered electricity generation blade's technical field, include: the test device comprises a test base, a blade clamp and a loading assembly, wherein the test base is fixedly arranged, the root of the blade is fixedly connected with the test base, the blade clamp is arranged on the blade, and the loading assembly is used for driving the blade to reciprocate. The utility model discloses a design of anchor clamps and at least one reel can satisfy the fatigue test scene of wind-powered electricity generation blade unipolar, biax single-point, multiple spot, and the combination of a plurality of reels uses the excitation ability that can increase fatigue loading system, the blade fatigue test demand of adaptable different specifications.
Description
Technical Field
The utility model relates to a wind-powered electricity generation blade's technical field especially relates to a wind-powered electricity generation blade fatigue test loading device.
Background
At present, each new blade needs to be subjected to a full-scale fatigue test before being put into use, the blade needs to be subjected to vibration tests in two directions of flapping and shimmy, and the vibration times generally need millions of times.
Commonly used blade fatigue testing systems typically use a pendulum or reciprocating fatigue loading approach to resonantly load the blade. Chinese utility model patent publication No. CN202710300U discloses a fatigue test device for megawatt wind turbine blades, which applies a simple resonance excitation force to the blades by rotating an eccentric mass block mounted on the blades, and performs a resonance test on the blades.
Such excitation devices relying on additional masses to provide the excitation force often require a significant amount of motor axial force and motor power. In addition, the self weight of the excitation equipment is large, so that the unbalanced loading of the blades can be caused. Although the fatigue test system for the wind power blade disclosed in the chinese utility model with the publication number CN212110522U overcomes the defects of large power consumption and self weight and the like in the conventional inertial fatigue loading mode, it needs a large-scale support to apply bilateral excitation force to the blade, and the additional cost is high.
Therefore, the conventional fatigue testing device has the following problems: 1. the inertial loading device is arranged on the blade and can be subjected to inertial additional force, so that the service life of the device is influenced, and the additional power of the motor is increased; 2. the larger self-weight of the inertial loading device can cause the unbalanced loading of the blade; 3. the non-inertial fatigue loading mode requires an extra large bracket to provide complete simple resonance excitation force.
Disclosure of Invention
Aiming at the existing problems, the fatigue test loading device for the wind power blade is provided, and the blade clamp is driven to move up and down by winding a loading cable arranged on a winding drum, so that the reciprocating vibration of the blade is simulated.
The specific technical scheme is as follows:
a wind turbine blade fatigue test loading device comprises: the device comprises a test base, a blade clamp and a loading assembly, wherein the test base is fixedly arranged, the root part of the blade is fixedly connected with the test base, the blade clamp is arranged on the blade, and the loading assembly is used for driving the blade to reciprocate;
the loading assembly comprises:
one end of the first connecting rod is hinged with the blade clamp;
the first winding drum is in transmission connection with the other end of the first connecting rod through a first loading cable;
and the driving device is in transmission connection with the first reel.
The wind power blade fatigue test loading device is characterized in that the upper end of the first connecting rod is hinged to the blade clamp.
Above-mentioned wind-powered electricity generation blade fatigue test loading attachment, wherein, the loading subassembly still includes: the first supporting seat is hinged to the middle of the second connecting rod, one end of the second connecting rod is hinged to the other end of the first connecting rod, and the first reel is in transmission connection with the second connecting rod through the first loading cable.
The fatigue test loading device for the wind power blade is characterized in that the loading assembly comprises: the two driving devices are respectively in transmission connection with the two first winding drums, and the two first winding drums are respectively in transmission connection with two ends of the second connecting rod through the two first loading cables.
Above-mentioned wind-powered electricity generation blade fatigue test loading attachment, wherein, the loading subassembly still includes: the first steering pulleys are symmetrically arranged on two sides of the first winding drum, two ends of the first loading cable are respectively connected with two ends of the second connecting rod, and the first loading cable is respectively in transmission connection with the two first steering pulleys.
Above-mentioned wind-powered electricity generation blade fatigue test loading attachment, wherein, the loading subassembly still includes: and the two balancing weights are respectively arranged at two ends of the second connecting rod.
Above-mentioned wind-powered electricity generation blade fatigue test loading attachment, wherein, the loading subassembly still includes: the sliding block is used for being connected with a guide groove on a longitudinal plane in a sliding mode, the sliding block is hinged to the first connecting rod, the fixing block is arranged on the first loading cable and hinged to the first connecting rod, and the first reel is in transmission connection with the fixing block through the first loading cable.
Above-mentioned wind-powered electricity generation blade fatigue test loading attachment, wherein, the loading subassembly still includes: the second supporting seat and the second diverting pulley are rotatably arranged on the second supporting seat and are abutted to the first loading cable.
Above-mentioned wind-powered electricity generation blade fatigue test loading attachment, wherein, the loading subassembly still includes: and the tensioning wheel is arranged on the second supporting seat and is abutted against the first loading cable.
Above-mentioned wind-powered electricity generation blade fatigue test loading attachment, wherein, the loading subassembly still includes: the first connecting rod is hinged end to form a rhombus, the first winding drum is in transmission connection with the first motor, the first winding drum is in transmission connection with the hinge points on the two sides of the first connecting rod through two first loading cables, the second winding drum is in transmission connection with the hinge points on the two sides of the first connecting rod through two first loading cables, so that the first winding drum moves relative to the hinge points on the upper end and the lower end of the first connecting rod or moves back to back, and the first winding drum is in transmission connection with the hinge points on the upper end of the first connecting rod through the first loading cables.
Compared with the prior art, the technical scheme has the positive effects that:
(1) the utility model can satisfy single-point or multi-point fatigue test scene of single shaft and double shafts of the wind power blade by the design of the blade clamp and at least one reel, and the combined use of a plurality of reels can increase the shock excitation capability of the fatigue loading system, and can adapt to the fatigue test requirements of blades with different specifications;
(2) the utility model directly applies the exciting force to the blade through the loading cable and the connecting rods (the first connecting rod, the second connecting rod and the third connecting rod), thereby making up the defect of larger motor power caused by the additional inertia force of the blade in the common inertial loading mode;
(3) the utility model uses the combination of the loading cable and the connecting rod, namely the combination of the soft and hard connection, thereby avoiding the situation that the blade part is damaged additionally due to the asynchronous output power and the blade motion in the pure and hard connection;
(4) the utility model can make up the defects of inaccurate control precision, low working efficiency and the like caused by long-term operation of hydraulic drive by using the exciting force required by the motor to output the blade;
(5) the utility model discloses still can add the counter weight quality piece on the connecting rod in the loading module, can change the test bending moment distribution of blade, also can alleviate the blade unbalance loading condition that the counter weight quality directly leads to on the blade.
Drawings
Fig. 1 is a schematic view of a first embodiment of a wind turbine blade fatigue test loading device according to the present invention;
fig. 2 is a schematic view of a second embodiment of the fatigue test loading device for wind turbine blades according to the present invention;
fig. 3 is a schematic diagram of a third embodiment of the fatigue test loading device for a wind turbine blade according to the present invention;
fig. 4 is a schematic diagram of a fourth embodiment of the loading device for fatigue test of wind turbine blades of the present invention.
In the drawings: 1. a drive device; 2. a first reel; 3. a second connecting rod; 4. a first connecting rod; 5. a first loading cable; 6. a first support base; 7. a blade clamp; 8. a balancing weight; 9. a blade; 10. a test base; 11. a first diverting pulley; 12. a guide groove; 13. a third connecting rod; 14. a second diverting pulley; 15. a fixed block; 16. a tension wheel; 17. a second loading cable; 18. a slider; 19. a second support seat; 20. a second reel.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
The first embodiment:
fig. 1 is the utility model relates to a wind-powered electricity generation blade fatigue test loading attachment's first embodiment's schematic diagram, as shown in fig. 1, the first embodiment of a wind-powered electricity generation blade fatigue test loading attachment of a preferred embodiment is shown, wind-powered electricity generation blade fatigue test loading attachment includes: the device comprises a test base 10, a blade 9, a blade clamp 7 and a loading assembly, wherein the root of the blade 9 is fixedly connected with the test base 10, the blade clamp 7 is arranged on the blade 9, and the loading assembly is used for driving the blade 9 to reciprocate so as to simulate the vibration of the blade 9;
the loading assembly comprises:
one end of the first connecting rod 4 is hinged with the blade clamp 7;
at least one first reel 2, wherein the first reel 2 is in transmission connection with the other end of the first connecting rod 4 through a first loading cable 5;
at least one driving device 1, wherein the driving device 1 is in transmission connection with the first reel 2.
The driving device 1 can be selected from an electric motor, a hydraulic motor and the like.
Further, as a preferred embodiment, the upper end of the first connecting rod 4 is hinged to the blade holder 7.
Further, as a preferred embodiment, the loading component further includes: the first supporting seat 6 is hinged with the middle part of the second connecting rod 3, one end of the second connecting rod 3 is hinged with the other end of the first connecting rod 4, the first winding drum 2 is in transmission connection with the second connecting rod 3 through a first loading cable 5, the number of the first winding drums 2 is two, the number of the first loading cables 5 is two, one end of each first loading cable 5 is wound on the corresponding first winding drum 2, the other end of each first loading cable 5 is fixedly arranged at one end of the second connecting rod 3, for example, the first loading cable 5 can be directly tied on the second connecting rod 3 or a through hole is arranged on the second connecting rod 3, the first loading cable 5 is tied on the second connecting rod 3 after passing through the through hole, each first winding drum 2 is rigidly connected with an output shaft of the driving device 1, and the two driving devices 1 work in opposite phases, when the left driving device 1 pulls the first loading cable 5 downwards, the right driving device 1 releases the first loading cable 5, the second connecting rod 3 rotates anticlockwise around the first supporting seat 6, and the first connecting rod 4 is driven to push the blade 9 to move upwards; when the left-hand drive 1 releases the first loading cable 5 upwards, the right-hand drive 1 pulls down the first loading cable 5, the second connecting rod 3 rotates clockwise around the first support 6, and the first connecting rod 4 pulls the blade 9 downwards. The two driving devices 1 work alternately to realize the reciprocating vibration of the blade 9.
Preferably, the other end of the first connecting rod 4 is hinged to the blade clamp 7 by a universal hinge.
Preferably, the first support seat 6 is hinged in the middle of the first connecting rod 4.
The above is merely an example of the preferred embodiments of the present invention, and the embodiments and the protection scope of the present invention are not limited thereby.
The utility model discloses still have following embodiment on above-mentioned basis:
second embodiment:
fig. 2 is a schematic diagram of a second embodiment of the fatigue test loading device for wind turbine blades of the present invention, as shown in fig. 2, the main structure of the second embodiment is substantially the same as the first embodiment, and the difference is: the loading assembly further comprises: the two ends of the first loading cable 5 are respectively connected with the two ends of the second connecting rod 3, the first loading cable 5 is respectively connected with the two first diverting pulleys 11 in a transmission way, the two first diverting pulleys 11 are respectively positioned below the second connecting rod 3, the first winding drum 2 is positioned between the two first diverting pulleys 11, the number of the first loading cable 5 is one, the first loading cable 5 is wound on the first winding drum 2, the first winding drum 2 is arranged in the middle of the first loading cable 5, the two ends of the first loading cable 5 are respectively fixedly connected with the two ends of the second connecting rod 3, the two first diverting pulleys 11 are respectively arranged on the two sides of the first winding drum 2, the two ends of the first loading cable 5 are respectively connected with the two first diverting pulleys 11 in a sliding way, the driving device 1 drives the second connecting rod 3 to rotate through forward rotation and reverse rotation, to effect reciprocating vibration of the vanes 9.
Further, as a preferred embodiment, the rotating assembly in the first and second embodiments further comprises: two balancing weights 8, two balancing weights 8 set up respectively at the both ends of second connecting rod 3, and balancing weight 8 follows the inertia force that second connecting rod 3 rotated and arouses and can change the moment of flexure distribution of blade 9.
Preferably, the two balancing weights 8 are symmetrically distributed at two ends of the second connecting rod 3.
In the above two embodiments, the driving device 1 can provide periodic loading force, and realize closed-loop control, which has the advantage of tracking the resonant frequency of the blade 9.
The third embodiment:
fig. 3 is a schematic diagram of a third embodiment of the loading device for fatigue testing of wind turbine blades of the present invention, as shown in fig. 3, the embodiment is obtained by changing on the basis of the first embodiment and the second embodiment, and the difference lies in that: the loading assembly further comprises: the device comprises at least one sliding block 18 and a fixed block 15, wherein the sliding block 18 is used for being in sliding connection with a guide groove 12 on a longitudinal plane, the sliding block 18 is hinged with a first connecting rod 4, the fixed block 15 is arranged on a first loading cable 5, the fixed block 15 is hinged with the first connecting rod 4, and the first winding drum 2 is in transmission connection with the fixed block 15 through the first loading cable 5.
Further, as a preferred embodiment, the loading component further includes: a second support base 19 and a second diverting pulley 14, the second diverting pulley 14 being rotatably mounted on the second support base 19 and abutting against the first loading cable 5.
Further, as a preferred embodiment, the loading component further includes: the tension pulley 16, the tension pulley 16 is disposed on the second support base 19, the tension pulley 16 abuts against the first loading cable 5, and the second diverting pulley 14 and the tension pulley 16 ensure that the first loading cable 5 does not shake.
The first connecting rod 4 can be arranged in the guide groove 12 in a sliding mode, the first connecting rod 4 and the fixing block 15 are connected through universal hinges and move up and down through the guide groove 12, the driving device 1 rotates forwards and backwards to drive the first loading cable 5 wound on the first reel 2 to move up and down, and therefore the first connecting rod 4 is driven to directly excite the blade 9 to vibrate.
The fourth embodiment:
fig. 4 is a schematic diagram of a fourth embodiment of the wind turbine blade fatigue test loading device of the present invention, as shown in fig. 4, the present embodiment is obtained by changing on the basis of the third embodiment, and the difference lies in that the loading assembly further includes: second reel 20, second motor and four third connecting rods 13, four third connecting rods 13 are articulated head and the tail in proper order and are formed a rhombus, second reel 20 is connected with the second motor transmission, second reel 20 is connected with the pin joint transmission of the both sides of four third connecting rods 13 respectively through two second loading cables 17 to make the pin joint relative motion or the back of the body motion at the upper and lower both ends of four third connecting rods 13, first reel 2 is connected with the pin joint transmission of the upper end of four third connecting rods 13 through first loading cable 5.
The second motor tightens the second loading cable 17, the second loading cable 17 pulls the prisms connected with the four third connecting rods 13 to deform and draw close, at this time, the driving device 1 positioned on the ground releases the first loading cable 5, and the blade 9 is subjected to an upward exciting force.
The second motor located at the top releases the second loading cable 17, the drive 1 at the ground tightens the first loading cable 5 and the blade 9 is subjected to a downward excitation force.
The driving device 1 and the second motor operate alternately, and can apply complete simple resonance exciting force to the blade 9.
Further, as a preferred embodiment, the four third connecting rods 13 define a geometrical space with a prismatic vertical section, and the second winding drum 20 is arranged at the geometrical center of the prismatic shape.
Preferably, the first and second loading cables 5, 17 are both cables or wires.
Preferably, the first connecting rod 4, the second connecting rod 3, and the third connecting rod 13 are all made of high-strength steel rods.
Preferably, the driving device 1 and the second motor are motors with sensors for detecting the loading force and the displacement.
The above is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, and it should be appreciated by those skilled in the art that various equivalent substitutions and obvious changes made in the specification and drawings should be included within the scope of the present invention.
Claims (10)
1. The utility model provides a wind-powered electricity generation blade fatigue test loading attachment which characterized in that includes: the device comprises a test base, a blade clamp and a loading assembly, wherein the test base is fixedly arranged, the root part of the blade is fixedly connected with the test base, the blade clamp is arranged on the blade, and the loading assembly is used for driving the blade to reciprocate;
the loading assembly comprises:
one end of the first connecting rod is hinged with the blade clamp;
the first winding drum is in transmission connection with the other end of the first connecting rod through a first loading cable;
and the driving device is in transmission connection with the first reel.
2. The wind blade fatigue test loading device of claim 1, wherein the upper end of the first connecting rod is hinged to the blade clamp.
3. The wind blade fatigue test loading device of claim 1, wherein the loading assembly further comprises: the first supporting seat is hinged to the middle of the second connecting rod, one end of the second connecting rod is hinged to the other end of the first connecting rod, and the first reel is in transmission connection with the second connecting rod through the first loading cable.
4. The wind blade fatigue test loading device of claim 3, wherein the loading assembly comprises: the two driving devices are respectively in transmission connection with the two first winding drums, and the two first winding drums are respectively in transmission connection with two ends of the second connecting rod through the two first loading cables.
5. The wind blade fatigue test loading device of claim 3, wherein the loading assembly further comprises: the first steering pulleys are symmetrically arranged on two sides of the first winding drum, two ends of the first loading cable are respectively connected with two ends of the second connecting rod, and the first loading cable is respectively in transmission connection with the two first steering pulleys.
6. The wind blade fatigue test loading device of claim 4 or 5, wherein the loading assembly further comprises: and the two balancing weights are respectively arranged at two ends of the second connecting rod.
7. The wind blade fatigue test loading device of claim 1, wherein the loading assembly further comprises: the sliding block is used for being connected with a guide groove on a longitudinal plane in a sliding mode, the sliding block is hinged to the first connecting rod, the fixing block is arranged on the first loading cable and hinged to the first connecting rod, and the first reel is in transmission connection with the fixing block through the first loading cable.
8. The wind blade fatigue test loading device of claim 7, wherein the loading assembly further comprises: the second supporting seat and the second diverting pulley are rotatably arranged on the second supporting seat and are abutted to the first loading cable.
9. The wind blade fatigue test loading device of claim 8, wherein the loading assembly further comprises: and the tensioning wheel is arranged on the second supporting seat and is abutted against the first loading cable.
10. The wind blade fatigue test loading device of claim 7, wherein the loading assembly further comprises: the first connecting rod is hinged end to form a rhombus, the first winding drum is in transmission connection with the first motor, the first winding drum is in transmission connection with the hinge points on the two sides of the first connecting rod through two first loading cables, the second winding drum is in transmission connection with the hinge points on the two sides of the first connecting rod through two first loading cables, so that the first winding drum moves relative to the hinge points on the upper end and the lower end of the first connecting rod or moves back to back, and the first winding drum is in transmission connection with the hinge points on the upper end of the first connecting rod through the first loading cables.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021208007610 | 2021-04-19 | ||
| CN202120800761 | 2021-04-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215004237U true CN215004237U (en) | 2021-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121014802.XU Active CN215004237U (en) | 2021-04-19 | 2021-05-13 | Wind-powered electricity generation blade fatigue test loading device |
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|---|---|
| CN (1) | CN215004237U (en) |
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2021
- 2021-05-13 CN CN202121014802.XU patent/CN215004237U/en active Active
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