Wind tunnel blade root tensile test tool

Abstract

The utility model discloses a wind tunnel blade root tensile test tool in the technical field of test tools, and the wind tunnel blade root tensile test tool comprises a fixed end connecting assembly which comprises a fixed end connector, one end of the fixed end connector is fixedly connected with one end of a test piece, and the other end of the fixed end connector and a fixed sleeve are provided with a fixed end wedge block; the fixed end is connected with the fixed end of the tensile testing machine through a fixed end wedge block; the movable end connecting assembly comprises a movable end connector, one end of the movable end connector is fixedly connected with the other end of the test piece, the other end of the movable end connector and a fixed sleeve are provided with a movable end wedge block, and the movable end connector is connected with the movable end of the tensile testing machine through the movable end wedge block. The device can be conveniently matched with an existing tensile testing machine to complete a tensile test, and can be used in a pneumatic blade test.

Description

Technical Field

[0001] The utility model relates to the technical field of test tooling, in particular to a blade root tensile test tooling. Background Art

[0002] The root of the wind tunnel blade needs to be tensile tested after it is designed and produced. The shape of the hollow wind turbine blade root is quite special, and it cannot be directly fixed and connected to the existing tensile testing machine. In addition, the coaxiality of both ends must be ensured during the tensile test. Therefore, it is necessary to design a tensile test tool to perform tensile tests on the hollow wind turbine blade roots. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a wind tunnel blade root tensile test tooling, which has a simple structure and can be conveniently matched with an existing tensile testing machine to complete a tensile test.

[0004] The purpose of the utility model is achieved as follows: a wind tunnel blade root tensile test tool, comprising:

[0005] A fixed end connection assembly, comprising a fixed end connection head, one end of which is fixedly connected to one end of the test piece, and the other end of which is provided with a fixed end wedge block and connected to the fixed end of the tensile testing machine through the fixed end wedge block;

[0006] The mobile end connection component includes a mobile end connection head, one end of which is fixedly connected to the other end of the test piece, and the other end is provided with a mobile end wedge block on the fixed sleeve, and is connected to the mobile end of the tensile testing machine through the mobile end wedge block.

[0007] Furthermore, one end of the fixed end connector is a fixed end square portion, which is inserted into the test piece and fixedly connected thereto, and the other end of the fixed end connector is a fixed end circular portion, and a fixed end square boss is provided at the transition between the fixed end circular portion and the fixed end square portion.

[0008] Furthermore, the fixed end circular portion is threaded with a fixed end nut, and the fixed end wedge block is sleeved between the fixed end nut on the fixed end circular portion and the fixed end square boss.

[0009] Furthermore, the fixed end square portion is fixedly connected to the test piece via a fixed end fastener, and the fixed end fastener is arranged through the fixed end square portion and the test piece.

[0010] Furthermore, one end of the mobile terminal connector is a mobile terminal square portion, which is inserted into the test piece and fixedly connected thereto, and the other end of the mobile terminal connector is a mobile terminal circular portion, and a mobile terminal square boss is provided at the transition between the mobile terminal circular portion and the mobile terminal square portion.

[0011] Furthermore, the movable end circular portion is threaded with a movable end nut, and the movable end wedge block is sleeved between the movable end nut on the movable end circular portion and the movable end square boss.

[0012] Furthermore, the movable end square portion is fixedly connected to the test piece via a movable end fastener, and the movable end fastener is disposed through the movable end square portion and the test piece.

[0013] Compared with the prior art, the beneficial effects of the utility model are: the utility model has a simple structure, is easy to manufacture, and is low in cost. Its structure contains standard parts that can be directly purchased and used, which simplifies the manufacturing and assembly process. The test personnel can operate it easily and can quickly and effectively measure the maximum tensile force that the blade root can withstand in real time, which reduces costs and greatly improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the structure of the utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the fixed end connection component of the utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the fixed end connector of the utility model.

[0018] Figure 4 This is a schematic diagram of the structure of the mobile terminal connection component of the utility model.

[0019] Figure 5 This is a schematic diagram of the structure of the mobile terminal connector of the utility model.

[0020] Figure 6 It is a schematic diagram of the connection between the utility model and the test piece.

[0021] Among them, 100 fixed end connection assembly, 101 fixed end connection head, 101a fixed end square part, 101b fixed end circular part, 101c fixed end square boss, 102 fixed end wedge, 103 fixed end nut, 104 fixed end fastener, 200 mobile end connection assembly, 201 mobile end connection head, 201a mobile end square part, 201b mobile end circular part, 201c mobile end square boss, 202 mobile end wedge, 203 mobile end nut, 204 mobile end fastener, 300 test piece. DETAILED DESCRIPTION

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

[0023] like Figure 1-6 A wind tunnel blade root tensile test fixture is shown, comprising:

[0024] The fixed end connection assembly 100 includes a fixed end connector 101, one end of which is fixedly connected to one end of the test piece 300, and the other end is fixedly sleeved with a fixed end wedge 102, which is connected to the fixed end of the tensile testing machine through the fixed end wedge 102.

[0025] Specifically, the fixed end wedge block 102 adopts a quadrangular pyramid structure with a through hole in the center, and the testing machine is provided with a fixed end wedge-shaped slot that matches the fixed end wedge block 102 .

[0026] One end of the fixed end connector 101 is a fixed end square portion 101a, which is inserted into the test piece 300 and fixedly connected thereto, and the other end of the fixed end connector 101 is a fixed end circular portion 101b. A fixed end square boss 101c is provided at the transition between the fixed end circular portion 101b and the fixed end square portion 101a.

[0027] It should be noted that since the fixed end circular portion 101b and the fixed end square portion 101a have different shapes, stress concentration may occur. The problem of stress concentration is solved by designing the fixed end square boss 101c.

[0028] The fixed end circular portion 101b is threaded with a fixed end nut 103, and the fixed end wedge block 102 is sleeved between the fixed end nut 103 on the fixed end circular portion 101b and the fixed end square boss 101c.

[0029] Specifically, the fixed end nut 103 is a circular nut, and the fixed end nut 103 is screwed on after the fixed end wedge block 102 is put on.

[0030] The fixed-end square portion 101 a is fixedly connected to the test piece 300 via a fixed-end fastener 104 , and the fixed-end fastener 104 is disposed through the fixed-end square portion 101 a and the test piece 300 .

[0031] Specifically, the fixed end fastener 104 includes a fixed end bolt and a matching fixed end washer.

[0032] It should be noted that such a design can prevent the fixed end bolts from falling off during the tensile test.

[0033] The mobile end connection assembly 200 includes a mobile end connection head 201, one end of which is fixedly connected to the other end of the test piece 300, and the other end is fixedly sleeved with a mobile end wedge block 202, which is connected to the mobile end of the tensile testing machine through the mobile end wedge block 202.

[0034] Specifically, the mobile end wedge block 202 adopts a quadrangular pyramid structure with a through hole in the center, and the testing machine is provided with a mobile end wedge-shaped slot that cooperates with the mobile end wedge block 202 .

[0035] One end of the mobile terminal connector 201 is a mobile terminal square portion 201a, which is inserted into the test piece 300 and fixedly connected thereto, and the other end of the mobile terminal connector 201 is a mobile terminal circular portion 201b. A mobile terminal square boss 201c is provided at the transition between the mobile terminal circular portion 201b and the mobile terminal square portion 201a.

[0036] It should be noted that, since the circular portion 201b of the moving end is different from the square portion 201a of the moving end in shape, stress concentration may occur. The problem of stress concentration is solved by designing the square boss 201c of the moving end.

[0037] The movable end circular portion 201b is threaded with a movable end nut 203, and the movable end wedge block 202 is sleeved between the movable end nut 203 on the movable end circular portion 201b and the movable end square boss 201c.

[0038] Specifically, the moving end nut 203 is a circular nut, and the moving end nut 203 is screwed on after the moving end wedge block 202 is put on.

[0039] The moving end square portion 201 a is fixedly connected to the test piece 300 via a moving end fastener 204 , and the moving end fastener 204 is disposed through the moving end square portion 201 a and the test piece 300 .

[0040] Specifically, the moving end fastener 204 includes a moving end bolt and a matching moving end washer.

[0041] It should be noted that such a design can prevent the moving end bolt from falling off during the tensile test.

[0042] The working principle of the utility model is:

[0043] The test piece 300 is connected and fixed with the connecting heads on both sides by pin bolts, and the pin bolts are matched with a small gap to ensure that the bolts, the test piece 300 and the tooling are tightly fitted together; the test piece 300 and the tooling are placed in a tensile testing machine as a whole, and the two ends are clamped and fixed by wedge grooves and wedge blocks.

[0044] The operation process of the tensile testing machine: load to 100KN for the first time, unload, and check whether the test piece 300 and the connection are abnormally light; load to 550KN for the second time, hold the load for 10s, continue to load to 1100KN, hold the load for 30min, unload and check whether the test piece 300 is damaged, and check whether there are any abnormal conditions during the loading test; load for the third time until damage.

[0045] The above embodiments are only used to help understand the method and core idea of ​​the utility model. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made to the utility model without departing from the principle of the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A wind tunnel blade root tensile test tool, characterized in that: include: A fixed end connection assembly (100) comprises a fixed end connection head (101), one end of the fixed end connection head (101) being fixedly connected to one end of the test piece (300), and the other end of the fixed end connection head (101) being provided with a fixed end wedge block (102) and connected to the fixed end of the tensile testing machine via the fixed end wedge block (102); The mobile end connection assembly (200) comprises a mobile end connection head (201), one end of the mobile end connection head (201) being fixedly connected to the other end of the test piece (300), and the other end of the mobile end connection head (201) being provided with a mobile end wedge block (202) in a fixed sleeve, and being connected to the mobile end of the tensile testing machine via the mobile end wedge block (202).

2. A wind tunnel blade root tensile test fixture according to claim 1, characterized in that: One end of the fixed end connector (101) is a fixed end square portion (101a) which is inserted into the test piece (300) and fixedly connected thereto, and the other end of the fixed end connector (101) is a fixed end circular portion (101b), and a fixed end square boss (101c) is provided at the transition between the fixed end circular portion (101b) and the fixed end square portion (101a).

3. A wind tunnel blade root tensile test fixture according to claim 2, characterized in that: The fixed end circular portion (101b) is threaded with a fixed end nut (103), and the fixed end wedge block (102) is sleeved between the fixed end nut (103) on the fixed end circular portion (101b) and the fixed end square boss (101c).

4. A wind tunnel blade root tensile test fixture according to claim 2, characterized in that: The fixed end square portion (101a) is fixedly connected to the test piece (300) via a fixed end fastener (104), and the fixed end fastener (104) is arranged through the fixed end square portion (101a) and the test piece (300).

5. A wind tunnel blade root tensile test fixture according to any one of claims 1 to 4, characterized in that: One end of the mobile end connector (201) is a mobile end square portion (201a) which is inserted into the test piece (300) and fixedly connected thereto, and the other end of the mobile end connector (201) is a mobile end circular portion (201b), and a mobile end square boss (201c) is provided at the transition between the mobile end circular portion (201b) and the mobile end square portion (201a).

6. A wind tunnel blade root tensile test fixture according to claim 5, characterized in that: The movable end circular portion (201b) is threaded with a movable end nut (203), and the movable end wedge block (202) is sleeved between the movable end nut (203) on the movable end circular portion (201b) and the movable end square boss (201c).

7. A wind tunnel blade root tensile test fixture according to claim 5, characterized in that: The movable end square portion (201a) is fixedly connected to the test piece (300) via a movable end fastener (204), and the movable end fastener (204) is arranged through the movable end square portion (201a) and the test piece (300).

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