Distributed load impact reliability test device

Abstract

The present disclosure provides a distributed load impact reliability test device. The distributed load impact reliability test device includes a test bench, a cylindrical member, a loading member and a driving mechanism. The test bench is used to carry a test piece. The cylindrical member is provided with a cavity that passes through in a preset direction, and one end of the cavity can be sealed and connected to the surface of the test piece away from the test bench. The loading member is slidably sealed with the inner wall of the cavity, so that the area of ​​the cavity between the test piece and the loading member forms a sealed space that can accommodate liquid. The driving mechanism is used to apply an impact load toward the test piece to the loading member. The present disclosure can quickly apply a distributed load to the test piece, thereby improving the accuracy of the test result.

Description

Technical Field

[0001] The present disclosure relates to the technical field of testing devices, and in particular to a distributed load impact reliability testing device. Background Art

[0002] As a component of an aircraft, the wall panel is a typical load-bearing mechanism, which is often impacted by distributed loads. Among them, the reliability of the wall panel when subjected to the impact of distributed loads has an important impact on the safety of the aircraft.

[0003] In order to detect the reliability of the wall panel, the wall panel is often brought into contact with a water bag, and the water bag is impacted by a driving mechanism so that the water bag applies a distributed load to the wall panel. However, it is difficult for the impacted water bag to quickly apply a distributed load to the wall panel, so that the distributed load on the wall panel cannot meet the requirements of the detection conditions, reducing the accuracy of the detection result.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] The purpose of the present disclosure is to provide a distributed load impact reliability test device, which can quickly apply a distributed load to a test piece and improve the accuracy of the test result.

[0006] According to one aspect of the present disclosure, a distributed load impact reliability test device is provided. The distributed load impact reliability test device includes a test bench, a cylindrical member, a loading member, and a driving mechanism. The test bench is used to carry a test piece. The cylindrical member is provided with a cavity that passes through in a preset direction, and one end of the cavity can be sealed and connected to the surface of the test piece away from the test bench. The loading member is slidably sealed with the inner wall of the cavity, so that the area of ​​the cavity between the test piece and the loading member forms a sealed space that can accommodate liquid. The driving mechanism is used to apply an impact load toward the test piece to the loading member.

[0007] In an exemplary embodiment of the present disclosure, a cross section of the loading member in a direction perpendicular to the preset direction is circular.

[0008] In an exemplary embodiment of the present disclosure, the preset direction is a vertical direction, and the driving mechanism includes a bracket and a moving member. The moving member is detachably connected to the bracket and is located directly above the loading member, wherein when the moving member is connected to the bracket, the moving member and the loading member have a preset distance; when the moving member is separated from the bracket, the moving member falls along the vertical direction and can contact the loading member to apply the impact load to the loading member.

[0009] In an exemplary embodiment of the present disclosure, the driving mechanism further comprises a guide column. The guide column extends along the preset direction, one end of the guide column is fixed to the test bench, and the other end of the guide column can slidably pass through the moving member.

[0010] In an exemplary embodiment of the present disclosure, the moving member is connected to the bracket by electromagnetic adsorption.

[0011] In an exemplary embodiment of the present disclosure, the moving member is in a plate-like structure and is perpendicular to the preset direction.

[0012] In an exemplary embodiment of the present disclosure, the loader includes a first end and a second end, the first end can be slidably sealed with the inner wall of the cavity, the second end extends out of the cavity, and the second end is provided with an end face perpendicular to the preset direction.

[0013] In an exemplary embodiment of the present disclosure, the loading member further comprises an end plate, which is perpendicular to the preset direction and arranged on the end surface, wherein a cross-sectional area of ​​the end plate perpendicular to the preset direction is larger than an area of ​​the end surface.

[0014] In an exemplary embodiment of the present disclosure, the distributed load impact reliability test device further comprises a load detection device. The load detection device is used to detect the load applied to the test piece.

[0015] In an exemplary embodiment of the present disclosure, the distributed load impact reliability test device further comprises a strain detection device. The strain detection device is detachably provided on the test piece and is used to detect the strain of the test piece.

[0016] The distributed load impact reliability test device disclosed in the present invention, during the test process, fills the area of ​​the cavity between the loading member and the test piece with liquid, and applies an impact load toward the test piece to the loading member through a driving mechanism, so that the loading member squeezes the liquid, and then the liquid applies a distributed load to the test piece, so as to perform a reliability test. Since one end of the cavity can be sealed and connected to the test piece, the loading member can be sealed and matched with the inner wall of the cavity, so that the liquid in the area between the loading member and the test piece is not easy to deform, and then the squeezed liquid can quickly apply a distributed load to the test piece, thereby improving the accuracy of the test result.

[0017] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other features and advantages of the present disclosure will become more apparent by describing in detail its exemplary embodiments with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present disclosure, and for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the distributed load impact reliability test device according to the embodiment of the present disclosure when the moving part and the loading part are separated;

[0020] Figure 2 It is a schematic diagram of the distributed load impact reliability testing device according to an embodiment of the present disclosure when a moving part contacts a loading part.

[0021] In the figure: 1. test bench; 2. test piece; 3. cylindrical member; 4. cavity; 41. first chamber; 42. second chamber; 5. loading member; 6. end plate; 7. moving member; 8. guide column; 9. laser displacement meter; 10. electromagnet; 11. load detection device. DETAILED DESCRIPTION

[0022] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as being limited to the examples set forth herein; on the contrary, these embodiments are provided so that the disclosure will be comprehensive and complete, and the concept of the example embodiments will be fully conveyed to those skilled in the art. The described features, structures, or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, materials, devices, etc. may be employed. In other cases, known technical solutions are not shown or described in detail to avoid blurring various aspects of the present disclosure. The same reference numerals in the figures represent the same or similar structures, and thus their detailed descriptions will be omitted.

[0023] In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings represent the same or similar parts, and thus their repeated description will be omitted. The terms "a", "an" and "the" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to indicate an open-ended inclusive meaning and mean that in addition to the listed elements / components / etc., additional elements / components / etc. may exist.

[0024] The embodiment of the present disclosure provides a distributed load impact reliability test device. The distributed load impact reliability test device is used to detect the reliability of a test piece when it is subjected to a distributed load. The test piece can be a wall panel, etc. The wall panel can be a skin wall panel, a reinforced wall panel, etc. Among them, the wall panel can be used in an engine air intake, a submarine hull, etc. The shape of the test piece can be rectangular, circular, etc. Figure 1 and Figure 2 As shown, the distributed load impact reliability test device may include a test bench 1, a cylindrical member 3, a loading member 5 and a driving mechanism, wherein:

[0025] The test bench 1 is used to carry the test piece 2. The cylindrical member 3 is provided with a cavity 4 which penetrates along a preset direction. One end of the cavity 4 can be sealed and connected with the test piece 2. The loading member 5 can slide and seal with the inner wall of the cavity 4, so that the area of ​​the cavity between the test piece 2 and the loading member 5 forms a sealed space capable of containing liquid. The driving mechanism is used to apply an impact load toward the test piece 2 to the loading member 5.

[0026] In the distributed load impact reliability test device of the embodiment of the present disclosure, during the test process, the area of ​​the cavity 4 between the loading member 5 and the test piece 2 is filled with liquid, and the loading member 5 is applied with an impact load toward the test piece 2 through a driving mechanism, so that the loading member 5 squeezes the liquid, and then the liquid applies a distributed load to the test piece 2, so as to carry out a reliability test. Since one end of the cavity 4 can be sealed and connected to the test piece 2, the loading member 5 can be sealed and matched with the inner wall of the cavity 4, so that the liquid in the area between the loading member 5 and the test piece 2 is not easy to deform, and then the squeezed liquid can quickly apply a distributed load to the test piece 2, thereby improving the accuracy of the test results, and can be used to detect the reliability of test pieces such as wall panels when they are subjected to explosion shock or hammer wave shock. The liquid used can be water, but the present disclosure does not make any special limitation here.

[0027] The following is a detailed description of each part of the reliability test device of the embodiment of the present disclosure:

[0028] like Figure 1 and Figure 2 As shown, the test bench 1 is a supporting structure of a distributed load impact reliability test device. The test bench 1 may have a bearing surface, which may be used to bear the test piece 2. The material of the test bench 1 may be steel to improve the strength of the bearing surface so that the bearing surface can stably bear the test piece 2. Of course, the material of the test bench 1 may also be other materials with greater strength such as iron. For example, the material of the test bench 1 is No. 45 steel. In addition, the test bench 1 may be formed by welding corner boxes, but the present disclosure is not limited thereto.

[0029] like Figure 1 and Figure 2As shown, the cylindrical member 3 is used to fix the test piece 2. The material of the cylindrical member 3 can be steel, but is not limited to this, and can also be iron, etc. The cylindrical member 3 can have a cavity 4. The cavity 4 can be penetrated along a preset direction. The cavity 4 may include a first chamber 41 and a second chamber 42. The first chamber 41 and the second chamber 42 are distributed and connected along the preset direction. Among them, the cross-section of the first chamber 41 in the direction perpendicular to the preset direction can be circular, but is not limited to this, and can also be rectangular or other shapes. The cross-section of the second chamber 42 in the direction perpendicular to the preset direction can be rectangular, circular or other shapes. In an exemplary embodiment, the inner wall of the cavity 4 can be provided with an anti-corrosion coating to reduce the corrosion of the liquid injected into the test to the inner wall of the cavity 4. The material of the anti-corrosion coating can be epoxy resin. Of course, the material of the anti-corrosion coating can also be other materials, which are not listed here one by one. In another exemplary embodiment, the inner wall of the cavity 4 can be provided with a lubricating coating, and the material of the lubricating coating is not specifically limited in this disclosure. In addition, one end of the cavity 4 can be sealed and connected to the test piece 2. Among them, one end of the second chamber 42 of the cavity 4 away from the first chamber 41 can be sealed and connected to the test piece 2. The sealing connection can be a threaded connection, but the embodiment of the present disclosure is not particularly limited to this.

[0030] like Figure 1 and Figure 2 As shown, the loading member 5 can squeeze the liquid injected into the cavity 4 so that the liquid applies a distributed load to the test piece 2. The loading member 5 can slide with the inner wall of the cavity 4 so that the area of ​​the cavity between the test piece 2 and the loading member 5 forms a sealed space capable of accommodating the liquid. In addition, since the inner wall of the cavity 4 is provided with a lubricating coating, the friction between the loading member 5 and the inner wall of the cavity 4 is reduced, so that the loading member 5 can squeeze the liquid more smoothly. The loading member 5 can seal with the inner wall of the cavity 4 to prevent the liquid from flowing out of the gap between the loading member 5 and the inner wall of the cavity 4 during the process of the loading member 5 squeezing the liquid.

[0031] The loading member 5 may include a first end and a second end. The first end can be slidably sealed with the inner wall of the cavity 4, and the second end extends out of the cavity 4. Further, the first end can be slidably sealed with the inner wall of the first chamber 41 of the cavity 4. Taking the example that the cross section of the first chamber 41 in the direction perpendicular to the preset direction is circular, the loading member 5 is a cylinder, one end of the cylinder can slide in the first chamber 41, and the diameter of the cylinder is adapted to the size of the cross section of the first chamber 41 in the direction perpendicular to the preset direction, so that the cylinder is sealed with the inner wall of the first chamber 41. In addition, the second end of the loading member 5 is provided with an end face perpendicular to the preset direction. The loading member 5 of the embodiment of the present disclosure may also include an end plate 6. The end plate 6 may be perpendicular to the preset direction and may be provided on the end face of the second end. Among them, the cross-sectional area of ​​the end plate 6 in the direction perpendicular to the preset direction may be greater than the end face area of ​​the second end.

[0032] like Figure 1 and Figure 2 As shown, the driving mechanism is used to apply an impact load toward the test piece 2 to the loading member 5. The embodiment of the present disclosure can use the vertical direction as a preset direction, and the test piece 2 can be arranged at the lower part of the cavity 4 in the vertical direction, and sealed and connected to the end of the second chamber 42 of the cavity 4 away from the first chamber 41. In an exemplary embodiment, the driving mechanism may include a bracket (not shown) and a moving member 7. The moving member 7 is detachably connected to the bracket, and the moving member 7 is located directly above the loading member 5 in the vertical direction. The material of the moving member 7 can be a material with greater strength such as steel and iron. The moving member 7 can be in the shape of a plate, and of course, it can also be in other shapes. The moving member 7 can be connected to the bracket by electromagnetic adsorption. Among them, an electromagnet 10 is provided on the bracket, and the material of the moving member 7 is iron. When the electromagnet 10 is powered on, it can be connected to the moving member 7; when the electromagnet 10 is powered off, it can be separated from the moving member 7. In other embodiments of the present disclosure, the moving member 7 can also be connected to the bracket by other detachable connection methods such as snap-on.

[0033] like Figure 1 As shown, when the moving member 7 is connected to the bracket, the moving member 7 and the loading member 5 have a preset distance. Figure 2 As shown, after the moving member 7 is separated from the bracket, the moving member 7 falls in the vertical direction and can contact with the loading member 5 to apply an impact load to the loading member 5. Wherein, the falling of the moving member 7 in the vertical direction can be a free fall motion. The moving member 7 can apply an impact load to the loading member 5 by its own gravity so that the loading member 5 squeezes the liquid. Further, the moving member 7 is located at the upper part of the second end of the loading member 5 in the vertical direction. After the moving member 7 is separated from the bracket, the moving member 7 falls in the vertical direction, contacts with the second end of the loading member 5, and applies an impact load to the second end of the loading member 5 by its own gravity.

[0034] The driving mechanism of the embodiment of the present disclosure may further include a guide column 8. The guide column 8 may extend along a preset direction, and one end of the guide column 8 is fixed to the test bench 1, and the other end may slidably pass through the moving member 7. Since the guide column 8 extends along the preset direction, the moving member 7 can be made to fall along the preset direction. Among them, the number of the guide columns 8 may be one, two or four, but is not limited thereto, and may be more. In addition, since the cross-sectional area of ​​the end plate 6 in a direction perpendicular to the preset direction is larger than the end face area of ​​the second end of the loader 5, the moving member 7 can be made to contact with the end plate 6 having a larger cross section, thereby avoiding contact between the moving member 7 and the end face of the second end, and reducing the pressure on the moving member 7. In other embodiments of the present disclosure, the driving mechanism may include other components, which will not be described in detail here.

[0035] like Figure 1 and Figure 2 As shown, the distributed load impact reliability test device of the embodiment of the present disclosure may also include a load detection device 11. The load detection device 11 is used to detect the load on the test piece 2. The load detection device 11 may be a pressure sensor, or other components, which are not listed here. The load detection device 11 may contact the liquid in the cavity 4, and obtain the load on the test piece 2 by detecting the pressure of the liquid.

[0036] The distributed load impact reliability test device of the embodiment of the present disclosure may also include a strain detection device. The strain detection device is provided on the test piece and is used to detect the strain of the test piece. The strain detection device may be a strain gauge. In other embodiments of the present disclosure, the strain detection device may also be other components.

[0037] like Figure 1 and Figure 2 As shown, the distributed load impact reliability test device of the embodiment of the present disclosure may also include a displacement detection device. The displacement detection device is used to detect the displacement of the part of the test piece 2 corresponding to the cavity 4 in a preset direction. The displacement detection device may be a laser displacement meter 9. The laser displacement meter 9 is located on the side of the test piece 2 away from the cavity 4, and is distributed along the preset direction with the test piece 2. Among them, the laser emitted by the laser displacement meter 9 can reach the test piece 2. In an exemplary embodiment, the test bench 1 includes a support plate and a leg. One side of the support plate is a bearing surface, and the other side is connected to a leg, and the support plate has a through channel. The test piece 2 is located at the position of the bearing surface corresponding to the channel, and the laser displacement meter 9 is provided on the side of the support plate away from the test piece 2, and the laser emitted by the laser displacement meter 9 can pass through the channel to reach the test piece 2. In the embodiment of the present disclosure, the displacement detection device may also be other components, which will not be described in detail here.

[0038] The distributed load impact reliability test device of the embodiment of the present disclosure may also include a data acquisition device. The data acquisition device may be connected to the load detection device, the strain detection device, and the displacement detection device to collect the load on the test piece, the strain of the test piece, and the displacement of the test piece in a preset direction. Through the data acquisition device, the response of the test piece under the distributed load impact can be determined.

[0039] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practice. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary techniques in the art. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A distributed load impact reliability test device, characterized in that: include: A test bench, used for carrying a test piece; A cylindrical member, provided with a cavity penetrating along a preset direction, one end of the cavity being capable of being sealed and connected to a surface of the test piece away from the test bench; A loading member, which is slidably and sealingly matched with the inner wall of the cavity, so that the area of ​​the cavity between the test piece and the loading member forms a sealed space capable of containing liquid; A driving mechanism, used for applying an impact load toward the test piece to the loading piece; During the test, the area of ​​the cavity between the loading member and the test piece is filled with liquid, and the driving mechanism applies an impact load toward the test piece to the loading member, so that the loading member squeezes the liquid, and then the liquid applies a distributed load to the test piece, so as to perform a reliability test; since one end of the cavity can be sealed and connected to the test piece, the loading member can be sealed and matched with the inner wall of the cavity, so that the liquid in the area between the loading member and the test piece is not easy to deform, so that the squeezed liquid can quickly apply a distributed load to the test piece, thereby improving the accuracy of the test result; The preset direction is a vertical direction, and the driving mechanism comprises: Bracket; a moving member detachably connected to the bracket and located directly above the loading member, wherein when the moving member is connected to the bracket, the moving member and the loading member have a preset distance; when the moving member is separated from the bracket, the moving member falls along the vertical direction and can contact the loading member to apply the impact load to the loading member; The driving mechanism further comprises: A guide column extending along the preset direction, one end of the guide column being fixed to the test bench and the other end of the guide column being slidable through the moving member; The loading member comprises a first end and a second end, the first end can be slidably sealed with the inner wall of the cavity, the second end extends out of the cavity, and the second end is provided with an end surface perpendicular to the preset direction; The loading component also includes: an end plate, perpendicular to the preset direction and arranged on the end surface, wherein a cross-sectional area of ​​the end plate perpendicular to the preset direction is larger than an area of ​​the end surface; The distributed load impact reliability test device also includes: A load detection device, used to detect the load on the test piece; The distributed load impact reliability test device also includes: The strain detection device is arranged on the test piece and is used to detect the strain of the test piece.

2. The distributed load impact reliability test device according to claim 1, characterized in that: The cross section of the loading component in a direction perpendicular to the preset direction is circular.

3. The distributed load impact reliability test device according to claim 1, characterized in that: The moving part is connected to the bracket through electromagnetic adsorption.

4. The distributed load impact reliability test device according to claim 1, characterized in that: The moving member is in a plate-like structure and is perpendicular to the preset direction.

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