CN223685206U - Clamp for fuel cell vibration test - Google Patents

Abstract

A clamp for vibration test of a fuel cell comprises a disc with an isolation groove, wherein the disc comprises a fixed outer ring and a fixed inner disc which is integrally formed with the fixed outer ring and is positioned in the fixed outer ring, a plurality of through holes are formed in the fixed outer ring and the fixed inner disc, the depth of the isolation groove is larger than the height of a bolt head of a first bolt penetrating through the through hole formed in the fixed inner disc, and the disc with the isolation groove is arranged between an end plate at one side of the fuel cell and an expansion table top of a vibration table, so that the fuel cell is firmly arranged on the expansion table top of the vibration table, the position of the fuel cell in the high-frequency vibration test process is ensured not to deviate, and the accuracy of test data and the test efficiency are remarkably improved.

Description

Clamp for fuel cell vibration test

Technical Field

The utility model relates to the technical field of vibration testing fixtures, in particular to a fixture for fuel cell vibration testing.

Background

The stability and reliability of the fuel cell under high-frequency vibration or complex stress environment are of great importance, which puts high demands on the vibration resistance and stability of the fixing device. However, the existing clamp is easy to deform or loosen in the test process due to insufficient rigidity or poor vibration resistance, and the accuracy of experimental data is affected. In addition, the traditional clamp is connected with the test table surface, so that compatibility problems or mechanical interference often occur, the installation is complex, the adjustment is difficult, and the operation difficulty and the time cost of the experiment are increased.

Currently, commonly used vibration test fixtures include bolt fixtures, shock absorbing fixtures with cushioning material, fixtures of fixed ring design, and the like. Although these designs can fix or damp the fuel cell to a certain extent, the problems of unsatisfactory vibration-proof effect, easy fatigue damage and complicated installation process generally exist, and the requirements on the stability and the accuracy of test data of the fuel cell under the condition of high-frequency vibration cannot be met.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model aims to provide the clamp for the vibration test of the fuel cell, and the disc with the isolation groove is arranged between the end plate at one side of the fuel cell and the expansion table surface of the vibration table, so that the fuel cell is firmly arranged on the expansion table surface of the vibration table, the position of the fuel cell in the high-frequency vibration test process is ensured not to deviate, and the accuracy of test data and the test efficiency are obviously improved.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a clamp for vibration test of a fuel cell comprises a disc 2 with an isolation groove 1, wherein the disc 2 comprises a fixed outer ring 21 and a fixed inner disc 22 which is integrally formed with the fixed outer ring 21 and is positioned in the fixed outer ring 21, the fixed outer ring 21 and the fixed inner disc 22 are respectively provided with a plurality of through holes 3, and the depth of the isolation groove 1 is larger than the height of a bolt head of a bolt 4 penetrating through the through holes 3 formed in the fixed inner disc 22.

Further, the cross sections of the fixed inner disc 22 and the isolation groove 1 are the same.

Further, the cross-sections of the fixed inner disc 22 and the isolation groove 1 include, but are not limited to, circular, regular polygons.

Further, the disc 2 is made of magnesium-aluminum alloy.

Compared with the prior art, the utility model has the following beneficial effects:

1. The design of the isolation groove 1 effectively avoids mechanical interference generated when the disc 2 is mounted on the expansion table top 6 of the vibrating table, reduces noise caused by mechanical contact, further ensures accuracy of test data, improves compatibility of the disc 2 and the expansion table top 6 of the vibrating table, simplifies mounting and debugging processes, and greatly improves experimental efficiency and operation convenience.

2. According to the utility model, through the combined use of the fixed outer ring 21 and the fixed inner ring 22 of the disc 2 and the combination of the bolt I4 and the bolt II 5, the fuel cell 7 is stably fixed on the expansion table top 6, so that the fuel cell 7 is ensured to be stable and free from displacement in the high-frequency vibration test, and the accuracy of test data and the experimental efficiency are obviously improved.

3. The utility model adopts the light high-strength magnesium aluminum alloy material, thereby avoiding resonance problem in the test frequency band, reducing the load of the vibrating table, reducing the loss of the clamp and the equipment, prolonging the service life, remarkably reducing the maintenance cost and being suitable for long-term use in various vibration test scenes.

In summary, the disc 2 with the isolation groove 1 is arranged between the end plate 8 at one side of the fuel cell 7 and the expansion table top 6 of the vibration table, so that the fuel cell 7 is firmly arranged on the expansion table top 6 of the vibration table, the position of the fuel cell 7 in the high-frequency vibration test process is ensured not to deviate, and the accuracy of test data and the test efficiency are remarkably improved.

Drawings

Fig. 1 is a structural view of a first embodiment of the present utility model.

Fig. 2 is a structural diagram of a second embodiment of the present utility model.

Fig. 3 is a schematic diagram illustrating the operation of the present utility model in a practical application scenario.

Fig. 4 is a second working schematic diagram of the present utility model in a practical application scenario.

In the figure, 1, an isolation groove, 2, a disc, 21, a fixed outer ring, 22, a fixed inner disc, 3, a through hole, 4, a first bolt, 5, a second bolt, 6, an expansion table board, 7, a fuel cell, 8 and an end plate.

Detailed Description

The utility model is described in further detail below with reference to the accompanying drawings.

Referring to fig. 1-3, a clamp for vibration test of a fuel cell comprises a disc 2 with an isolation groove 1, wherein the disc 2 comprises a fixed outer ring 21 and a fixed inner disc 22 which is integrally formed with the fixed outer ring 21 and is positioned in the fixed outer ring 21, a plurality of through holes 3 are formed in the fixed outer ring 21 and the fixed inner disc 22, and the depth of the isolation groove 1 is larger than the height of a bolt head of a bolt 4 penetrating through the through holes 3 formed in the fixed inner disc 22.

As shown in fig. 1, 2 and 4, in this embodiment, the fixed outer ring 21 is a main supporting portion of the whole disc 2, and a plurality of through holes 3 are uniformly distributed on the fixed outer ring 21, and the whole disc 2 can be fixed on the extended table top 6 of the vibration table by penetrating the bolts two 5 in the through holes 3, so as to ensure stability in the vibration test process. The connecting and fixing parts between the disc 2 and the expansion table top 6 of the vibrating table are not limited to the bolts two 5, and can also play a role in fixing and connecting by other parts such as pins or shafts.

As shown in fig. 1-4, a plurality of through holes 3 are uniformly distributed on the fixed inner disc 22 of the disc 2, and the through holes 3 are fixedly connected with two end plates 8 on two sides of the fuel cell 7 by penetrating bolts 4, so that the fuel cell 7 can be stably arranged on the disc 2 on one side away from the isolation groove 1, and the position of the fuel cell 7 is ensured not to deviate under the high-frequency vibration test environment.

As shown in fig. 3 and 4, in order to prevent the bolt head of the bolt one 4 penetrating through the through hole 3 on the fixed inner disc 22 from interfering with the extended table top 6 of the vibration table, the contact surface between the whole disc 2 and the extended table top 6 of the vibration table is uneven, and the depth of the isolation groove 1 needs to be reasonably set, so that the depth of the isolation groove 1 in this embodiment needs to be greater than the height of the bolt head of the bolt one 4, thereby ensuring that the bolt head of the bolt one 4 is completely embedded in the isolation groove 1, and avoiding the bolt head of the bolt one 4 from directly contacting with the extended table top 6 of the vibration table. Through the arrangement of the isolation groove 1, the stability of the whole testing process can be effectively maintained, noise caused by mechanical contact is reduced, and the accuracy of test data is further ensured, meanwhile, the compatibility of the disc 2 and the expansion table top 6 of the vibrating table is improved, the mounting and debugging processes are simplified, and the experimental efficiency and the operation convenience are greatly improved.

As shown in fig. 1-3, the fixed inner disc 22 and the isolation groove 1 are identical in cross section.

The cross-sections of the fixed inner tray 22 and the isolation groove 1 include, but are not limited to, circular, regular polygonal, rectangular, elliptical, etc. as embodiments of the present utility model. The cross-sections of the fixed inner disc 22 and the isolation groove 1 are circular as shown in fig. 1, and the cross-sections of the fixed inner disc 22 and the isolation groove 1 are regular dodecagons as shown in fig. 2.

The disc 2 is made of magnesium-aluminum alloy. In the embodiment, the light and high-rigidity magnesium aluminum alloy is used as the material, and the natural frequency of the light and high-rigidity magnesium aluminum alloy is obviously higher than the maximum frequency of the test frequency band, so that the resonance phenomenon is effectively avoided, and the stability and the accuracy of test data are further ensured.

Through optimization of materials and structures, the disc 2 has strong vibration resistance, is light in weight and is suitable for testing environments of high-frequency vibration.

The working principle of the utility model is as follows:

In the high-frequency vibration test process of the fuel cell 7, in order to ensure the stability of the fuel cell 7, a disc 2 with an isolation groove 1 is arranged between an end plate 8 at one side of the fuel cell 7 and an expansion table top 6 of the vibration table, so that the position of the fuel cell 7 is ensured not to deviate, and the accuracy of test data is improved.

The two end plates 8 on two sides of the fuel cell 7 can be connected with the disc 2 through the bolts I4 penetrating through the through holes 3 on the fixed inner disc 22 of the disc 2, so that the fuel cell 7 is stably arranged on the disc 2 on one side deviating from the isolation groove 1, the bolts II 5 penetrating through the through holes 3 of the fixed outer ring 21 of the disc 2, the disc 2 on one side with the isolation groove 1 is fixed on the expansion table top 6 of the vibration table through the bolts II 5, and the disc 2 is in flat connection with the expansion table top 6 of the vibration table without interference because the height of the bolt head of the bolts I4 is smaller than the depth of the isolation groove 1.

Claims (4)

1. A clamp for vibration test of a fuel cell is characterized by comprising a disc (2) with an isolation groove (1), wherein the disc (2) comprises a fixed outer ring (21) and a fixed inner disc (22) which is integrally formed with the fixed outer ring (21) and is positioned in the fixed outer ring (21), a plurality of through holes (3) are formed in the fixed outer ring (21) and the fixed inner disc (22), and the depth of the isolation groove (1) is larger than the height of a bolt head of a first bolt (4) penetrating through the through holes (3) formed in the fixed inner disc (22).

2. A fixture for vibration testing of fuel cells according to claim 1, wherein the cross section of the fixed inner plate (22) and the isolation groove (1) are the same.

3. A fixture for vibration testing of fuel cells according to claim 2, wherein the cross section of the fixed inner disk (22) and the isolation groove (1) includes, but is not limited to, a circular shape, a regular polygon.

4. A fixture for vibration testing of fuel cells according to claim 1, wherein the disc (2) is made of magnesium-aluminum alloy.