A tension test device for a wind turbine blade stud connection pair

Abstract

The utility model discloses a kind of tension test devices of wind power blade stud connecting pair, belong to stud connecting pair tension installation technical field.Solve the problem that blade stud connecting pair appears tension over twist or under twist, causes shutdown rework when installing in situ.The utility model includes blade stud, blade stud is equipped with load inductor, the both ends of this blade stud are threaded end, middle is thin rod, and load inductor is stretched out in threaded both ends, and the threaded end of one end of blade stud is screwed with tension head inside, and the threaded end is also provided with matched nut;Tension head carries out tension test to blade stud connecting pair, tighten tension head after tension, and tension head and load inductor end face are attached without gap, then the blade stud connecting pair installation is qualified, if there is gap between tension head and load inductor end face, then blade stud connecting pair has installation problem, the device can verify whether blade stud connecting pair exists installation problem in advance, reduce actual installation loss.

Description

Technical Field

[0001] This utility model belongs to the technical field of stud connection pair tensioning and installation, specifically relating to a tensioning test device for stud connection pairs of wind turbine blades. Background Technology

[0002] Typically, high-strength bolted connections are installed using the torque method. A torque wrench is used to apply torque to the nut, and the thread converts the torque into tension, thus allowing the stud connection to reach the designed preload. Due to the product structure and installation environment requirements of wind turbine blade studs, blade stud connections are usually installed using the tension method. During installation, a tensioner is used to directly apply tension to the blade stud, and the nut is tightened while the stud is under tension, ultimately causing the stud connection to be tightened under the preload.

[0003] However, during actual on-site construction and installation of blade studs, defects in stud connectors or other components, or inconsistent performance of stud connectors from different batches, often lead to over-tightening or under-tightening during tensioning, leaving potential installation quality issues, or causing rework or work stoppages on-site, resulting in unnecessary losses. Utility Model Content

[0004] The purpose of this invention is to provide a tensioning test device for wind turbine blade stud connections, in order to solve the problem in the background art where over-tightening or under-tightening of blade stud connections occurs during on-site construction due to component defects, leaving potential installation quality hazards.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: A tensioning test device for a wind turbine blade stud connection assembly includes a blade stud with a load sensor running through it. The blade stud has threaded ends at both ends and a thin rod in the middle. The cross-sectional diameter of the threaded ends is larger than that of the thin rod in the middle, and the load sensor extends out from both ends of the threaded ends. A tensioning head is provided at one end of the blade stud, and the threaded end engages with the internal thread of the tensioning head. A matching nut is also provided at the threaded end. The tensioning head is tightly fitted to the end of the load sensor.

[0006] Furthermore, the other threaded end of the blade stud is provided with two back-tightening nuts, and a back-tightening washer is provided between the back-tightening nuts and the load sensor.

[0007] Furthermore, the load sensor is mounted on a simple support, which is movably mounted on the test platform.

[0008] The beneficial effects of this utility model are as follows: The tensioning head, combined with a load sensor, monitors the tension data in real time to ensure the accuracy of the test. After the tensioning test, the presence of quality problems with the blade stud and the matching nut can be determined by observing whether the tensioning head can still be tightly attached to the end face of the load sensor after tightening and whether the matching nut can be rotated. The transition parts of the matching nut with the cylindrical surface on six sides are designed with a bevel angle to reduce stress concentration. By simulating tensioning installation, a tensile test is conducted on the blade stud connection pair before actual on-site operation. This can accurately detect problems of "over-tightening" or "under-tightening" caused by defective batches or performance differences, avoiding safety hazards during subsequent on-site installation. The overall process is simple and easy to operate, reducing losses during actual installation. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the blade stud of this utility model; Figure 3 This is a schematic diagram of the matching nut in this utility model.

[0010] In the diagram: 1-blade stud; 2-back tightening nut; 3-simple bracket; 4-load sensor; 5-matching nut; 6-tensioning head; 7-test platform; 8-back tightening washer. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0012] like Figures 1 to 3 As shown, a tensioning test device for a wind turbine blade stud connection includes a blade stud 1, through which a load sensor 4 is inserted. The blade stud 1 has threaded ends at both ends and a thin rod in the middle. The cross-sectional diameter of the threaded ends at both ends is larger than that of the thin rod in the middle, and both ends of the thread extend out of the load sensor 4. A tensioning head 6 is provided at one end of the blade stud 1. The threaded end is screwed into the internal thread of the tensioning head 6. A matching nut 5 is also provided at the threaded end. The tensioning head 6 is tightly fitted to the end of the load sensor 4.

[0013] Specifically, the other threaded end of the blade stud 1 is provided with two back-tightening nuts 2, and a back-tightening washer 8 is provided between the back-tightening nuts 2 and the load sensor 4.

[0014] Specifically, the load sensor 4 is mounted on the simple support 3, which is mounted on the test platform 7. The simple support 3 can move left and right on the test platform 7, making it easy to adjust according to the length of the stud.

[0015] In practical applications, the blade stud 1 is inserted through the load sensor 4, with both ends extending out. One end is locked and fixed with two back-tightening nuts 2 and back-tightening washers 8, and the other end is screwed into the matching nut 5. The end of the blade stud 1 extends out of the matching nut 5. The extended end of the blade stud 1 is tightened with the internal thread of the tensioning head 6. The end face of the tensioning head 6 is close to the end face of the load sensor 4, and the tail of the tensioning head 6 is connected to the tensioner.

[0016] The tensioner is activated to apply pressure to the blade stud 1, simulating on-site construction conditions. A specified tension is applied to the blade stud 1, and the load sensor 4 monitors the tension data in real time. After tensioning, the tensioner is closed. At this point, a certain gap will appear between the tension head 6 and the load sensor 4. The tension head 6 and the matching nut 5 are then tightened again, and it is observed whether the tension head 6 and the matching nut 5 can come into close contact with the end face of the load sensor 4. If the tension head 6 cannot be tightened and cannot come into close contact with the load sensor 4, and the matching nut 5 cannot be turned, it indicates that there is a defect in the blade stud 1 and the matching nut 5. This device, by simulating the tensioning test during actual installation, eliminates unqualified studs and nuts in advance, avoiding potential installation quality problems or work stoppages and rework due to product quality issues during construction.

Claims

1. A tensioning test device for a wind turbine blade stud connection pair, comprising a blade stud (1), characterized in that, The blade stud (1) is provided with a load sensor (4) through it. The blade stud (1) has threaded ends at both ends and a thin rod in the middle. The cross-sectional diameter of the threaded ends at both ends is larger than the cross-sectional diameter of the thin rod in the middle, and the load sensor (4) extends out of both ends of the thread. A tensioning head (6) is provided at one end of the blade stud (1). The threaded end is screwed into the internal thread of the tensioning head (6). A matching nut (5) is also provided at the threaded end. The tensioning head (6) is tightly fitted to the end of the load sensor (4).

2. The tensioning test device for a wind turbine blade stud connection pair according to claim 1, characterized in that, Two back-tightening nuts (2) are provided on the other threaded end of the blade stud (1), and a back-tightening washer (8) is provided between the back-tightening nut (2) and the load sensor (4).

3. A tensioning test device for a wind turbine blade stud connection pair according to claim 1 or 2, characterized in that, The load sensor (4) is mounted on a simple support (3), which is movably mounted on the test platform (7).

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