Wind power blade fatigue test static calibration device

Abstract

The utility model discloses a wind power blade fatigue test static calibration device which comprises a loading support mechanism, a fatigue test static calibration device, a blade clamp and a wind power blade body. The fatigue test static calibration device is installed on one side of the loading support mechanism. The blade clamp is movably connected to one side of the loading support mechanism, the wind power blade body is installed on the inner wall of the blade clamp, the loading support mechanism comprises a base, and the upper surface of the base is fixedly connected with a fixing frame. The loading support mechanism and the fatigue test static calibration device are arranged, the height of the pulley assembly on the fixing frame is adjusted, the flat sling with the length matched with that of the pulley assembly is selected, and loading or unloading operation is carried out in cooperation with the electric hoist. The loading height requirement and the blade deformation requirement of fatigue test static calibration of different wind power blade bodies can be met, and compared with the prior art, the device is more convenient to use and low in production cost.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine blades, in particular to a static calibration device for fatigue testing of wind turbine blades. Background Art

[0002] Wind turbine blades are key components in wind turbines for effectively capturing wind energy. Blade length continues to increase with the capacity of individual wind turbines. According to relevant regulations, wind turbine blades must undergo fatigue testing before entering mass production. Before fatigue testing, a static calibration device verifies the blades' load-bearing capacity under static loads, ensuring stable operation under normal operating conditions. The device also measures the blades' hardness and stress distribution, helping to assess their structural characteristics and material properties, ensuring their safety and reliability under design loads and providing important reference data for subsequent fatigue testing.

[0003] At present, the device used for static calibration of wind turbine blade fatigue test usually needs to be used in combination with multiple test equipment. This combination method not only increases the manufacturing cost, but also increases the operating cost. In addition, it is inconvenient to debug, install and use, lacks convenience, and is not convenient to flexibly adjust according to different static calibration requirements of wind turbine blades. It is not convenient to adjust the loading height and loading force according to different static calibration requirements of wind turbine blades. Therefore, it is necessary to design a static calibration device for wind turbine blade fatigue test that is convenient and adaptable to different static calibration requirements of wind turbine blades. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology in that the static calibration device for wind turbine blade fatigue test is not convenient for flexible adjustment according to different static calibration requirements of wind turbine blades, and is not convenient for adjusting the loading height and loading force according to different static calibration requirements of wind turbine blades, one of the purposes of the present utility model is to provide a static calibration device for wind turbine blade fatigue test.

[0005] One of the purposes of the present invention is achieved by adopting the following technical solution: a static calibration device for fatigue testing of wind turbine blades, comprising a loading bracket mechanism, a static calibration device for fatigue testing, a blade clamp and a wind turbine blade body: the static calibration device for fatigue testing is mounted on one side of the loading bracket mechanism, the blade clamp is movably connected to one side of the loading bracket mechanism, the wind turbine blade body is mounted on the inner wall of the blade clamp, the loading bracket mechanism comprises a base, a fixing frame is fixedly connected to the upper surface of the base, and threaded mounting holes are symmetrically provided on both side walls of the fixing frame at equal distances. One side of the fixing frame is mounted with a triangular support frame through a threaded mounting hole. The fatigue test static calibration device includes a pulley assembly, a support bracket is symmetrically mounted on the lower side of the fixing frame, a universal lifting lug is mounted on one side of the support bracket, an electric hoist is provided above the universal lifting lug, a steel wire rope is mounted below the electric hoist, the other end of the steel wire rope is mounted on the universal lifting lug, a flat sling is mounted above the electric hoist, the flat sling is movably connected to the outer surface of the pulley assembly, and one end of the flat sling is connected to the blade clamp. This facilitates adjusting the installation height of the pulley assembly on the loading bracket mechanism and selecting a flat sling of appropriate length according to the loading height requirements and blade deformation requirements of different wind turbine blade bodies, thereby meeting the requirements of static calibration of fatigue tests on different wind turbine blade bodies and improving the applicability of the device.

[0006] According to the static calibration device for wind turbine blade fatigue testing, the size of the wind turbine blade body is adapted to the size of the inner wall of the blade fixture, making it easy to position the wind turbine blade body on the inner wall of the blade fixture, thereby facilitating support and testing of the wind turbine blade body.

[0007] According to the static calibration device for fatigue testing of wind turbine blades, the width of the flat sling is smaller than the width of the inner wall of the fixing frame. The flat sling can pass through the fixing frame to transmit the loading force to the blade clamp.

[0008] According to the static calibration device for fatigue testing of wind turbine blades, the pulley assembly comprises a mounting bracket, a fixing bracket, a long pin, and a circular guard plate. The mounting bracket is mounted on one side of the fixing bracket via the threaded mounting hole, the fixing bracket is mounted on the upper surface of the mounting bracket, the long pin is mounted on the inner wall of the fixing bracket, and there are two circular guard plates, which are symmetrically fixed to the outer surface of the long pin. This facilitates supporting the flat sling and adjusting the height of the pulley assembly according to the loading height.

[0009] According to the static calibration device for fatigue testing of wind turbine blades, the mounting bracket has two equally spaced threaded mounting holes formed on its upper surface, through which the fixed bracket is mounted. The fixed bracket is mounted to the mounting bracket by screws threaded into the inner walls of the second threaded mounting holes. The split design facilitates maintenance and replacement.

[0010] According to the static calibration device for fatigue testing of wind turbine blades, the side walls of the triangular support frame are fixedly connected with reinforcing rods, and the reinforcing rods are welded to the triangular support frame, so as to improve the overall stability of the device.

[0011] The above scheme has the following beneficial effects:

[0012] 1. By setting up the loading bracket mechanism and the fatigue test static calibration device, adjusting the height of the pulley assembly on the fixed frame and selecting a flat sling with a matching length, and cooperating with an electric hoist for loading or unloading operations, the loading height requirements and blade deformation requirements of the static calibration of fatigue tests of different wind turbine blade bodies can be met. Compared with the existing technology, this device is more convenient to use and has a low production cost.

[0013] 2. Through the setting of the long pin shaft and the circular guard plate, the whole device adopts a split structure, which makes it easy to replace worn parts. The long pin shaft and the two circular guard plates can support the flat sling, so that the flat sling can still reliably transmit the loading force when the spatial angle changes, and prevent the flat sling from being cut, thereby effectively extending the service life of the flat sling.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0016] Figure 1 This is a schematic diagram of the overall structure of a static calibration device for fatigue testing of wind turbine blades according to the present invention;

[0017] Figure 2 This is a schematic diagram of the overall side view of a static calibration device for fatigue testing of wind turbine blades according to the present invention;

[0018] Figure 3 This is a structural schematic diagram of a support frame of a static calibration device for fatigue testing of wind turbine blades according to the present invention;

[0019] Figure 4This is a structural schematic diagram of a flat sling of a static calibration device for fatigue testing of wind turbine blades according to the present invention;

[0020] Figure 5 This utility model is a static calibration device for fatigue testing of wind turbine blades Figure 4 A in the middle is an enlarged structural diagram;

[0021] Figure 6 This utility model is a static calibration device for fatigue testing of wind turbine blades Figure 4 The enlarged structural diagram at B in the middle;

[0022] Figure 7 This is a structural schematic diagram of a pulley assembly of a static calibration device for fatigue testing of wind turbine blades according to the present invention.

[0023] Legend:

[0024] 1. Loading bracket mechanism; 101. Base; 102. Fixing bracket; 103. Threaded mounting hole 1; 104. Triangular support frame; 2. Fatigue test static calibration device; 201. Pulley assembly; 202. Support bracket; 203. Universal lifting eye; 204. Electric hoist; 205. Wire rope; 206. Flat lifting belt; 3. Blade clamp; 4. Wind turbine blade body; 5. Mounting bracket; 6. Fixing bracket; 7. Long pin shaft; 8. Circular guard plate; 9. Threaded mounting hole 2; 10. Reinforcement rod. DETAILED DESCRIPTION

[0025] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0026] Reference Figure 1-7A static calibration device for fatigue testing of wind turbine blades, comprising a loading support mechanism 1, a static calibration device for fatigue testing 2, a blade fixture 3 and a wind turbine blade body 4: the static calibration device for fatigue testing 2 is mounted on one side of the loading support mechanism 1, the blade fixture 3 is movably connected to one side of the loading support mechanism 1, the wind turbine blade body 4 is mounted on the inner wall of the blade fixture 3, the loading support mechanism 1 comprises a base 101, the upper surface of the base 101 is fixedly connected to a fixing frame 102, and the side walls of the fixing frame 102 are equidistant from each other. A threaded mounting hole 103 is provided on one side of the fixing frame 102, and a triangular support frame 104 is installed on one side of the fixing frame 102 through the threaded mounting hole 103. The fatigue test static calibration device 2 includes a pulley assembly 201, a support bracket 202 is symmetrically installed on the lower side of the fixing frame 102, and a universal lifting ear 203 is installed on one side of the support bracket 202. An electric hoist 204 is provided above the universal lifting ear 203, and a steel wire rope 205 is installed below the electric hoist 204. The other end of the steel wire rope 205 is installed on the universal lifting ear 2 03, a flat sling 206 is installed above the electric hoist 204, and the flat sling 206 is movably connected to the outer surface of the pulley assembly 201. One end of the flat sling 206 is connected to the blade clamp 3. The size of the wind turbine blade body 4 is adapted to the size of the inner wall of the blade clamp 3. The width of the flat sling 206 is smaller than the width of the inner wall of the fixing frame 102. The pulley assembly 201 consists of a mounting bracket 5, a fixing bracket 6, a long pin shaft 7 and a circular guard plate 8. The mounting bracket 5 is connected to the outer surface of the pulley assembly 201 through a threaded mounting hole 10. 3 is mounted on one side of the fixing bracket 102, the fixing bracket 6 is mounted on the upper surface of the mounting bracket 5, the long pin 7 is mounted on the inner wall of the fixing bracket 6, there are two circular guard plates 8, symmetrically fixed to the outer surface of the long pin 7, and the upper surface of the mounting bracket 5 is provided with two threaded mounting holes 9 equidistantly spaced, through which the fixing bracket 6 is mounted to the mounting bracket 5. The side walls of the triangular support frame 104 are fixedly connected with reinforcing rods 10, which are welded to the triangular support frame 104. The test static calibration device is assembled from a loading bracket mechanism 1 and a fatigue test static calibration device 2. Multiple components in the loading bracket mechanism 1 and the fatigue test static calibration device 2 are also assembled and connected, resulting in a split structure for the entire device. This facilitates the replacement and maintenance of worn parts and can meet the loading requirements of different wind turbine blade bodies 4, thus expanding its applicability.

[0027] Working principle: According to the loading requirements of the static calibration of the fatigue test of different wind turbine blade bodies 4, the pulley assembly 201 is installed at an appropriate height, and the screw is screwed into the threaded mounting hole 103 to install the mounting bracket 5 at an appropriate height on one side of the fixed frame 102. The blade clamp 3 is supported by external equipment, and then a flat sling 206 of appropriate length is selected to install it on the upper hook of the electric hoist 204. The flat sling 206 is then connected to the blade clamp 3 using an external overhead crane. After that, the staff performs loading or unloading actions by remotely operating the controller of the electric hoist 204, thereby completing the test of the wind turbine blade body 4. This makes it easier to test the wind turbine blade body 4 with different loading requirements by adjusting the height of the pulley assembly 201 and selecting a flat sling 206 of a matching length. This can meet the loading height requirements and blade deformation requirements of the static calibration of the fatigue test of different wind turbine blade bodies 4, effectively improving the applicability and convenience of the device.

[0028] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A static calibration device for fatigue testing of wind turbine blades, characterized in that: The invention comprises a loading support mechanism (1), a fatigue test static calibration device (2), a blade fixture (3) and a wind turbine blade body (4): the fatigue test static calibration device (2) is installed on one side of the loading support mechanism (1), the blade fixture (3) is movably connected to one side of the loading support mechanism (1), the wind turbine blade body (4) is installed on the inner wall of the blade fixture (3), the loading support mechanism (1) comprises a base (101), a fixing frame (102) is fixedly connected to the upper surface of the base (101), both side walls of the fixing frame (102) are symmetrically provided with threaded mounting holes (103) at equal distances, and a triangular support frame (104) is installed on one side of the fixing frame (102) through the threaded mounting holes (103); The fatigue test static calibration device (2) includes a pulley assembly (201), a support frame (202) is symmetrically installed on the lower side of the fixed frame (102), a universal lifting lug (203) is installed on one side of the support frame (202), an electric hoist (204) is arranged above the universal lifting lug (203), a steel wire rope (205) is installed below the electric hoist (204), the other end of the steel wire rope (205) is installed on the universal lifting lug (203), a flat sling (206) is installed above the electric hoist (204), the flat sling (206) is movably connected to the outer surface of the pulley assembly (201), and one end of the flat sling (206) is connected to the blade clamp (3).

2. A static calibration device for fatigue testing of wind turbine blades according to claim 1, characterized in that: The size of the wind turbine blade body (4) is compatible with the size of the inner wall of the blade fixture (3).

3. The static calibration device for fatigue testing of wind turbine blades according to claim 1, characterized in that: The width of the flat sling (206) is smaller than the width of the inner wall of the fixing frame (102).

4. The static calibration device for fatigue testing of wind turbine blades according to claim 1, characterized in that: The pulley assembly (201) consists of a mounting bracket (5), a fixing bracket (6), a long pin shaft (7) and a circular guard plate (8), wherein the mounting bracket (5) is mounted on one side of the fixing bracket (102) through the threaded mounting hole (103), the fixing bracket (6) is mounted on the upper surface of the mounting bracket (5), the long pin shaft (7) is mounted on the inner wall of the fixing bracket (6), and the number of the circular guard plates (8) is two, and the two circular guard plates (8) are symmetrically fixedly connected to the outer surface of the long pin shaft (7).

5. A static calibration device for fatigue testing of wind turbine blades according to claim 4, characterized in that: The upper surface of the mounting bracket (5) is provided with two threaded mounting holes (9) at equal intervals, and the fixing bracket (6) is mounted on the mounting bracket (5) through the two threaded mounting holes (9).

6. The static calibration device for fatigue testing of wind turbine blades according to claim 1, characterized in that: A reinforcing rod (10) is fixedly connected to the side wall of the triangular support frame (104), and the reinforcing rod (10) and the triangular support frame (104) are welded.

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