Wind power blade test counterweight adjusting pendulum bob structure

Abstract

The utility model discloses a wind power blade test counterweight adjusting pendulum bob structure, which comprises a base cross beam, the upper surface of the base cross beam is fixedly connected with a base inclined support beam, the upper surface of the base cross beam is fixedly connected with a base vertical beam, one side of a connecting plate is rotatably connected with a swing arm beam connecting bearing device, and the other side of the connecting plate is rotatably connected with a swing arm. And one side, connected with the bearing, of the swing arm beam is fixedly connected with the swing arm beam, one side of the bottom of the outer surface of the swing arm beam is fixedly connected with a balancing weight, and one end of the top of the outer surface of the swing arm beam is fixedly connected with a push rod system. Through the arrangement of a base cross beam, a base inclined supporting beam, a swing arm beam connecting bearing device, a push rod system, a swing arm beam and a balancing weight, the installation position of the base cross beam is adjusted according to a test space; the number and positions of the balancing weights, the position of the swing arm beam connecting bearing device, the position of the swing arm beam and the position of the push rod system can be adjusted, and different test requirements are met through different combinations.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a wind turbine blade test counterweight adjustment pendulum structure. Background Art

[0002] Blades are one of the core components of wind turbines, accounting for 15%-20% of the total cost. Taking into account the wind energy conversion rate of blades, the core direction of blade development is to make them larger, longer, lighter, and more flexible. Wind turbine blades have complex shapes and operate in harsh environments. During operation, blades are subjected to a variety of complex loads, including centrifugal loads caused by high-speed rotation and complex airflow disturbances. To ensure the normal operation of wind turbines, wind turbine blades, as key components, require full-scale structural testing. Fatigue testing is particularly important in verifying blade fatigue strength and guiding blade structural design.

[0003] GB / T 25384, Section 9.4, states that during fatigue testing, the damage caused by the test load in the test area should be equal to the damage caused by the target load. The fatigue test load is determined based on the principle of equal damage to shorten test time. Therefore, the bending moment distribution generated by the test load on the blade must match or exceed the bending moment generated by the target load in the test area, while keeping the excess as small as possible to avoid unrealistic failure. Overloading a portion of the blade may cause damage before the fatigue test is completed. To ensure safe testing, the damaged area must be repaired, which increases the test time. Existing solutions use calculations to determine the optimal blade mass distribution, exciter position, and excitation frequency to ensure smooth blade fatigue testing. To meet testing requirements, a larger added mass is typically required to achieve a more accurate test bending moment distribution. With the recent increase in wind turbine blade length and mass, the added mass required for test bending moments has become increasingly larger. This situation can generate very large flapping-direction bending moments on the blade, overloading portions of the blade and causing fatigue damage. Utility Model Content

[0004] The main purpose of the utility model is to provide a wind turbine blade test weight adjustment pendulum structure, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A wind turbine blade test counterweight adjustment pendulum structure includes a base crossbeam, an outer surface of the base crossbeam is provided with a first connecting hole, an upper surface of the base crossbeam is fixedly connected to a base oblique support beam, an outer surface of the base oblique support beam is provided with a third connecting hole, an upper surface of the base crossbeam is fixedly connected to a base vertical beam, an outer surface of the base vertical beam is provided with a second connecting hole, one side of the outer surface of the base vertical beam is fixedly connected to a connecting plate, one side of the connecting plate is rotatably connected to a swing arm beam connecting bearing device, one side of the swing arm beam connecting the bearing is fixedly connected to the swing arm beam, an outer surface of the swing arm beam is provided with a fourth connecting hole, a bottom side of the outer surface of the swing arm beam is fixedly connected to a counterweight block, and a top end of the outer surface of the swing arm beam is fixedly connected to a push rod system.

[0007] In order to facilitate the adjustment of the configuration of each component, as a wind turbine blade test counterweight adjustment pendulum structure of the utility model, the first connection hole, the second connection hole and the fourth connection hole are all φ27 through holes, and the third connection hole is a φ34 lifting hole.

[0008] In order to achieve the purpose of fixing the base crossbeam, as a wind turbine blade test counterweight adjustment pendulum structure of the present invention, the upper surface of the base crossbeam is fixedly connected with a first connecting channel steel.

[0009] In order to achieve the purpose of stably installing the base beam on the ground, the utility model provides a wind turbine blade test counterweight adjustment pendulum structure. One side of the lower surface of the base beam is fixedly connected to a ground rail connecting block, and the upper surface of the ground rail connecting block is provided with a mounting hole. The other side of the lower surface of the base beam is movably connected to an adjustable foot.

[0010] In order to facilitate the adjustment of the position of the base oblique support beam, the utility model provides a wind turbine blade test counterweight adjustment pendulum structure, the upper surface of the base oblique support beam is fixedly connected to a second connecting channel steel, and the upper surface of the second connecting channel steel is fixedly connected to a first lifting ring.

[0011] In order to facilitate the movement of the swing arm beam, as a wind turbine blade test counterweight adjustment pendulum structure of the present invention, the top end of the swing arm beam is fixedly connected with a second lifting ring.

[0012] In order to achieve the purpose of changing the length of the push rod system, the utility model provides a wind turbine blade test counterweight adjustment pendulum structure, one end of the push rod system is fixedly connected to a blade connecting device, one end of the blade connecting device is fixedly connected to a push rod, one end of the push rod is fixedly connected to a push rod adjustment device, and one end of the push rod adjustment device is fixedly connected to the swing arm beam.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The wind turbine blade test counterweight adjustment pendulum structure can provide a large additional mass for the test blade without generating additional bending moment in the swinging direction of the blade through the arrangement of the base crossbeam, the base oblique support beam, the connecting plate, the swing arm beam connected to the bearing device, the push rod system, the swing arm beam and the counterweight block. Moreover, the installation position of the base crossbeam can be adjusted according to the test space; the number and position of the counterweight block, the position of the swing arm beam connected to the bearing device, the position of the swing arm beam and the position of the push rod system can be adjusted. Through different modification combinations, different blade fatigue test requirements can be met.

[0015] 2. The wind turbine blade test counterweight adjustment pendulum structure is configured with a push rod system, a blade connection device, a push rod and a push rod adjustment device. The blade connection devices and the push rod adjustment devices at both ends of the push rod system are equipped with ball bearings, which can ensure that the system only transmits axial load to the blade. At the same time, the length of the push rod can be modified to meet the position requirements of different blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view structural diagram of a wind turbine blade test counterweight adjustment pendulum structure according to Example 1 of the present utility model;

[0017] Figure 2 This is a schematic top view of a wind turbine blade test counterweight adjustment pendulum structure according to Example 1 of the present utility model;

[0018] Figure 3 This is a schematic diagram of an adjustable foot structure of a wind turbine blade test counterweight adjustment pendulum structure in Example 1 of the present utility model;

[0019] Figure 4 This is a schematic diagram of the connecting plate structure of a wind turbine blade test counterweight adjustment pendulum structure in Example 1 of the present utility model;

[0020] Figure 5 This is a schematic diagram of the push rod structure of a wind turbine blade test counterweight adjustment pendulum structure in Example 1 of the utility model.

[0021] In the figure: 1. Ground rail connecting block; 2. Base crossbeam; 3. First connecting channel steel; 4. First connecting hole; 5. Base vertical beam; 6. Second connecting hole; 7. Base oblique support beam; 8. Swing arm beam; 9. Third connecting hole; 10. Second connecting channel steel; 11. First lifting ring; 12. Connecting plate; 13. Second lifting ring; 14. Push rod system; 1401. Push rod adjustment device; 1402. Push rod; 1403. Blade connecting device; 15. Mounting hole; 16. Adjustable foot; 17. Counterweight block; 18. Fourth connecting hole; 19. Swing arm beam connecting bearing device. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0023] like Figure 1-5 As shown, a wind turbine blade test counterweight adjustment pendulum structure includes a base crossbeam 2, an outer surface of the base crossbeam 2 is provided with a first connecting hole 4, the upper surface of the base crossbeam 2 is fixedly connected to a base oblique support beam 7, the outer surface of the base oblique support beam 7 is provided with a third connecting hole 9, the upper surface of the base crossbeam 2 is fixedly connected to a base vertical beam 5, the outer surface of the base vertical beam 5 is provided with a second connecting hole 6, one side of the outer surface of the base vertical beam 5 is fixedly connected to a connecting plate 12, one side of the connecting plate 12 is rotatably connected to a swing arm beam connecting bearing device 19, one side of the swing arm beam connecting bearing device 19 is fixedly connected to a swing arm beam 8, the outer surface of the swing arm beam 8 is provided with a fourth connecting hole 18, the bottom side of the outer surface of the swing arm beam 8 is fixedly connected to a counterweight block 17, and the top end of the outer surface of the swing arm beam 8 is fixedly connected to a push rod system 14.

[0024] During specific use, through the arrangement of the base crossbeam 2, the base oblique support beam 7, the connecting plate 12, the swing arm beam connecting the bearing device 19, the push rod system 14, the swing arm beam 8 and the counterweight 17, the swing arm beam 8 and the counterweight 17 can provide a large additional mass for the test blade without generating additional bending moment in the swinging direction of the blade; moreover, the installation position of the base crossbeam 2 can be adjusted according to the test space; the number and position of the counterweight 17, the position of the swing arm beam connecting the bearing device 19, the position of the swing arm beam 8 and the position of the push rod system 14 can be adjusted, and different modification combinations can be used to meet different blade fatigue test requirements.

[0025] In this embodiment, the first connection hole 4 , the second connection hole 6 and the fourth connection hole 18 are all through holes with a diameter of 27, and the third connection hole 9 is a lifting hole with a diameter of 34.

[0026] During specific use, the arrangement of the first connecting hole 4, the second connecting hole 6, the third connecting hole 9 and the fourth connecting hole 18 can simplify the selection of bolts during the installation process.

[0027] In this embodiment, a first connecting channel steel 3 is fixedly connected to the upper surface of the base beam 2 .

[0028] During specific use, the base beam 2 can be fixed by setting the first connecting channel steel 3.

[0029] In this embodiment, a ground rail connection block 1 is fixedly connected to one side of the lower surface of the base beam 2, a mounting hole 15 is opened on the upper surface of the ground rail connection block 1, and an adjustable foot 16 is movably connected to the other side of the lower surface of the base beam 2.

[0030] During specific use, the entire device can be adapted to different installation experimental environments through the arrangement of the ground rail connecting block 1 and the adjustable foot 16 .

[0031] In this embodiment, the upper surface of the base oblique support beam 7 is fixedly connected to the second connection channel steel 10 , and the upper surface of the second connection channel steel 10 is fixedly connected to the first lifting ring 11 .

[0032] During specific use, the second connecting channel steel 10 and the first lifting ring 11 are provided to stabilize the base oblique support beam 7 and facilitate movement.

[0033] In this embodiment, a second lifting ring 13 is fixedly connected to the top end of the swing arm beam 8 .

[0034] During specific use, the second lifting ring 13 can be used to easily change the position of the swing arm beam 8 and conduct different experiments.

[0035] In this embodiment, one end of the push rod system 14 is fixedly connected to the blade connecting device 1403, one end of the blade connecting device 1403 is fixedly connected to the push rod 1402, one end of the push rod 1402 is fixedly connected to the push rod adjustment device 1401, and one end of the push rod adjustment device 1401 is fixedly connected to the swing arm beam 8.

[0036] During specific use, through the setting of the push rod adjustment device 1401, the push rod 1402 and the blade connecting device 1403, the blade connecting device 1403 and the push rod adjustment device 1401 are equipped with spherical bearings, which can ensure that the system only transmits axial load to the blades. At the same time, the length of the push rod 1402 can be modified to meet the position requirements of different blades.

[0037] Working principle: The front end of the base crossbeam 2 of the system is connected to the ground rail through the ground rail connecting block 1 and fixed to the ground. The rear end is installed with an adjustable foot 16 to support the ground; the base crossbeam 2, the base oblique support beam 7 and the base vertical beam 5 are connected in pairs. The base crossbeams 2 are connected by the first connecting channel steel 3, the base oblique support beams 7 are connected by the second connecting channel steel 10, and the base vertical beams 5 are connected by the connecting plate 12. The overall stroke frame structure, the swing arm beam connection bearing device 19 is connected to the swing arm beam 8 through the bearing structure, and is connected to the base vertical beam 5 through the connecting plate 12. The lower end of the swing arm beam 8 is connected to the counterweight block 1 required for the test 7. The upper end of the rocker arm beam 8 is connected to the push rod system 14. The number and position of the counterweights 17 and the connection positions between the various components can be adjusted according to test requirements. The other end of the push rod system 14 is connected to the blade connecting device 1403. The connection position of the push rod system 14 and the rocker arm beam 8 can be adjusted according to the blade connected by the blade connecting device 1403. The length of the push rod 1402 can be adjusted according to the distance between the structure and the blade connected by the blade connecting device 1403 to meet the installation requirements of the push rod system 14 and the blade connecting device 1403. Ball bearings are installed at both ends of the push rod system 14 to ensure that the system only transmits axial load to the blade.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A wind turbine blade test weight adjustment pendulum structure, comprising a base beam (2), characterized in that: The outer surface of the base crossbeam (2) is provided with a first connection hole (4), the upper surface of the base crossbeam (2) is fixedly connected to the base oblique support beam (7), the outer surface of the base oblique support beam (7) is provided with a third connection hole (9), the upper surface of the base crossbeam (2) is fixedly connected to the base vertical beam (5), the outer surface of the base vertical beam (5) is provided with a second connection hole (6), one side of the outer surface of the base vertical beam (5) is fixedly connected to a connecting plate (12), one side of the connecting plate (12) is rotatably connected to a swing arm beam connecting bearing device (19), one side of the swing arm beam connecting bearing device (19) is fixedly connected to a swing arm beam (8), the outer surface of the swing arm beam (8) is provided with a fourth connection hole (18), the bottom side of the outer surface of the swing arm beam (8) is fixedly connected to a counterweight block (17), and the top end of the outer surface of the swing arm beam (8) is fixedly connected to a push rod system (14).

2. The wind turbine blade test weight adjustment pendulum structure according to claim 1, characterized in that: The first connection hole (4), the second connection hole (6) and the fourth connection hole (18) are all through holes with a diameter of 27, and the third connection hole (9) is a lifting hole with a diameter of 34.

3. The wind turbine blade test weight adjustment pendulum structure according to claim 1, characterized in that: A first connecting channel steel (3) is fixedly connected to the upper surface of the base crossbeam (2).

4. The wind turbine blade test weight adjustment pendulum structure according to claim 1, characterized in that: A ground rail connection block (1) is fixedly connected to one side of the lower surface of the base crossbeam (2), a mounting hole (15) is provided on the upper surface of the ground rail connection block (1), and an adjustable foot (16) is movably connected to the other side of the lower surface of the base crossbeam (2).

5. The wind turbine blade test weight adjustment pendulum structure according to claim 1, characterized in that: The upper surface of the base oblique support beam (7) is fixedly connected to a second connecting channel steel (10), and the upper surface of the second connecting channel steel (10) is fixedly connected to a first lifting ring (11).

6. The wind turbine blade test weight adjustment pendulum structure according to claim 1, characterized in that: A second lifting ring (13) is fixedly connected to the top end of the swing arm beam (8).

7. The wind turbine blade test weight adjustment pendulum structure according to claim 1, characterized in that: One end of the push rod system (14) is fixedly connected to a blade connecting device (1403), one end of the blade connecting device (1403) is fixedly connected to a push rod (1402), one end of the push rod (1402) is fixedly connected to a push rod adjusting device (1401), and one end of the push rod adjusting device (1401) is fixedly connected to a swing arm beam (8).

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