CN112649299B

CN112649299B - Structural strength testing device

Info

Publication number: CN112649299B
Application number: CN201910956293.3A
Authority: CN
Inventors: 胡道宇; 毛凯; 张艳清; 翟茂春; 陈慧星; 夏委; 冯馨月; 刘坤; 龚珺; 邹玲; 吕民东; 周伟; 胡良辉
Original assignee: Casic Feihang Technology Research Institute of Casia Haiying Mechanical and Electronic Research Institute
Current assignee: Casic Feihang Technology Research Institute of Casia Haiying Mechanical and Electronic Research Institute
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2022-10-18
Anticipated expiration: 2039-10-10
Also published as: CN112649299A

Abstract

The invention relates to the technical field of simulation tests and discloses a structural strength test device. The device comprises an operation table board, a hydraulic pump, a speed regulation stop valve, a push clamp support, a pull clamp support, a plurality of gantry top plates, a gantry pressing plate, a first connecting piece, a first hydraulic jack, a second hydraulic jack, a plurality of third hydraulic jacks, a tooling plate, a push clamp bottom plate, a push clamp upper plate, a pull clamp bottom plate, a pull clamp upper plate, a pull clamp top plate and a second connecting piece, a tested piece, the push clamp support and the pull clamp support are arranged on the operation table board, the speed regulation stop valve divides one channel hydraulic pressure output by the hydraulic pump into multi-channel hydraulic pressure which is respectively provided for the first hydraulic jack, the second hydraulic jack and a plurality of third hydraulic jacks and controls each channel, the first hydraulic jack applies longitudinal thrust on-off load to the tested piece, the second hydraulic jack applies longitudinal tension load to the tested piece, and the third hydraulic jacks apply normal pressure load to the tested piece. Thereby enabling validation of structural strength design.

Description

Structural strength testing device

Technical Field

The invention relates to the technical field of simulation tests, in particular to a structural strength test device.

Background

The eddy current brake is a brake without mechanical contact, and the principle is as follows: the superconducting magnet or the permanent magnet moves relative to the braking plate (metal material), which is equivalent to the braking plate cutting magnetic lines of force, and free electrons in the metal are acted by induced electromotive force generated by the changing magnetic field, so that eddy current-like current, namely induced eddy current, is formed in the metal. From lenz's law, it is known that the effect of induced eddy currents is always to oppose the cause of the induced eddy currents, thereby creating a braking effect. The eddy current brake is typically applied to a U.S. Holloman magnetic levitation rocket sled linear eddy current brake, a high-speed train disc type eddy current brake and the like. For a linear eddy current brake, the metal brake plates are subjected to normal loads in addition to longitudinal braking loads during braking, both loads being present simultaneously. Therefore, the structural strength design of the metal brake plate supporting and fixing structure is very critical, and the brake fails once the structure is damaged.

Based on this, a test device capable of verifying the structural strength design of, for example, a metal brake plate supporting and fixing structure is required.

Disclosure of Invention

The invention provides a structural strength testing device which can solve the technical problem that structural strength design cannot be verified in the prior art.

The invention provides a structural strength test device, which comprises an operation table board, a hydraulic pump, a speed regulation stop valve, a push clamp support, a pull clamp support, a plurality of gantry top plates, a gantry pressing plate, a first connecting piece, a first hydraulic jack, a second hydraulic jack, a plurality of third hydraulic jacks, a tooling plate, a push clamp bottom plate, a push clamp upper plate, a pull clamp bottom plate, a pull clamp upper plate, a pull clamp top plate and a second connecting piece, wherein a tested piece, the push clamp support and the pull clamp support are arranged on the operation table board, the speed regulation stop valve divides one channel hydraulic pressure output by the hydraulic pump into multi-channel hydraulic pressures which are respectively supplied to the first hydraulic jack, the second hydraulic jack and the plurality of third hydraulic jacks and controls the on-off of each channel, the first hydraulic jack is arranged on the push-clamp bracket, one side of the first hydraulic jack is contacted with the push-clamp bracket, the other side of the first hydraulic jack is contacted with the push-clamp bottom plate and the push-clamp upper plate, the first hydraulic jack is used for exerting longitudinal thrust load on the tested piece under the action of hydraulic pressure, the second hydraulic jack is arranged on the pull-clamp bracket, one side of the second hydraulic jack is contacted with the pull-clamp bracket, the other side of the second hydraulic jack is contacted with the pull-clamp top plate, the second hydraulic jack is used for exerting longitudinal tension load on the tested piece under the action of hydraulic pressure, the pull-clamp top plate is connected with the pull-clamp upper plate through the second connecting piece, the tooling plate is arranged on the tested piece, one end of the tooling plate is connected with the push-clamp bottom plate and the pull-clamp upper plate, the other end of the tooling plate is connected with the pull-clamp bottom plate and the pull-clamp upper plate, the gantry pressing plate is arranged on the tested piece provided with the tooling plate, a plurality of the gantry pressing plates are arranged on the gantry pressing plate and are connected with the operation table top through the first connecting piece, and the third hydraulic jack is arranged in the groove below each gantry top plate and is used for applying normal pressure load to the tested piece under the hydraulic action.

Preferably, the device further comprises a load cell arranged between the second hydraulic jack and the pull clamp bracket for measuring the magnitude of the applied load.

Preferably, the device further comprises a display connected to the load cell for displaying the magnitude of the measured load in real time.

Preferably, one end of the tooling plate is fixed between the push clamp bottom plate and the push clamp upper plate through a through hole bolt, and the other end of the tooling plate is fixed between the pull clamp bottom plate and the pull clamp upper plate through a through hole bolt.

Preferably, the number of the gantry top plate and the third hydraulic jack is two, wherein,

the device also comprises a first connecting pipe, a second connecting pipe, a third connecting pipe, a fourth connecting pipe and a fifth connecting pipe, wherein the hydraulic pump is connected with the speed regulation stop valve through the first connecting pipe, the speed regulation stop valve is connected with the first hydraulic jack through the second connecting pipe, connected with the second hydraulic jack through the third connecting pipe, and connected with the two third hydraulic jacks through the fourth connecting pipe and through the fifth connecting pipe respectively.

Preferably, the device further comprises a transition plate arranged between the operation table and the tested piece.

Preferably, the first connecting piece and the second connecting piece are both screw rods.

Preferably, the hydraulic pump is a manual hydraulic pump or an electric hydraulic pump.

Through the technical scheme, a hydraulic power source can be provided through the hydraulic pump, the longitudinal thrust load, the longitudinal tensile load and the normal pressure load are provided for the tested piece through the matching of the hydraulic jacks arranged at different positions and the corresponding parts, so that the real load environment of the metal brake plate fixing structure in the braking process can be simulated, and the structural strength design verification is realized. And, can adjust the hydraulic output of hydraulic pump according to actual demand and adjust the load size of exerting, have simple structure easily advantage of operation.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic diagram of an overall layout of a structural strength testing apparatus according to an embodiment of the present invention;

FIGS. 2A and 2B are schematic views of a pusher-clamp portion of a structural strength testing apparatus according to an embodiment of the present invention;

FIGS. 3A and 3B are schematic views of a tension clamp portion of a structural strength testing apparatus according to an embodiment of the present invention;

FIG. 4 is an axial view of a portion of a structural strength testing apparatus according to an embodiment of the present invention;

FIG. 5 is a front view of a portion of a structural strength testing apparatus according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a gantry top plate according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a tooling plate fixed on the surface of a tested piece according to an embodiment of the invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.

Fig. 1 is a schematic overall layout diagram of a structural strength testing apparatus according to an embodiment of the present invention.

Fig. 2A and 2B are schematic views of a pinch portion of a structural strength testing apparatus according to an embodiment of the present invention.

Fig. 3A and 3B are schematic views of a pulling and clamping portion of a structural strength testing apparatus according to an embodiment of the present invention.

As shown in fig. 1 to 3, an embodiment of the present invention provides a structural strength testing apparatus, wherein the apparatus includes an operation table 1, a hydraulic pump 2, a speed regulation stop valve 4, a push clamp bracket 5, a pull clamp bracket 6, a plurality of gantry top plates 7, a gantry pressure plate 8, a first connecting member 9, a first hydraulic jack 10, a second hydraulic jack 13, a plurality of third hydraulic jacks 12, a tooling plate 20, a push clamp bottom plate 21, a push clamp top plate 22, a pull clamp bottom plate 23, a pull clamp top plate 24, a pull clamp top plate 25 and a second connecting member 26, a test piece 28, the push clamp bracket 5 and the pull clamp bracket 6 are disposed on the operation table 1, the speed regulation stop valve 4 divides a channel hydraulic pressure outputted from the hydraulic pump 2 into a plurality of channels hydraulic pressures to be respectively supplied to the first hydraulic jack 10, the second hydraulic jack 13, and the plurality of third hydraulic jacks 12 and controls the respective channels to be opened and closed, the first hydraulic jack 10 is disposed on the push clamp bracket 5 and one side of the push clamp bracket 5 and the push clamp bottom plate 23 to be contacted with the push clamp bracket 5 while the other side of the push clamp bottom plate 24 is disposed on the other side of the push clamp bottom plate 6 and the other side of the push clamp bottom plate 24 for applying a tensile force to be applied to the push clamp bottom plate 28 and the longitudinal load to be applied to the push clamp bottom plate 21 and the clamp bottom plate 21 for connecting the push clamp bottom plate 20, the gantry pressing plate 8 is arranged on a tested piece 28 provided with the tooling plate 20, the gantry top plates 7 are arranged on the gantry pressing plate 8 and are connected with the operation table board 1 through the first connecting pieces 9, and the third hydraulic jacks 12 are arranged in grooves below the gantry top plates 7 and are used for applying normal pressure load to the tested piece 28 under the hydraulic action.

Wherein, the hydraulic pump 2 and the speed regulation stop valve 4 can also be arranged on the operation table board 1; further, for example, the hydraulic pump 2, the speed control stop valve 4, the push clamp bracket 5, the pull clamp bracket 6, and the test piece 28 may be fixedly provided on the operation table 1. The push clamp support 5 can be used for supporting and fixing a hydraulic jack applying longitudinal pushing force, the pull clamp support 6 can be used for supporting and fixing a hydraulic jack applying longitudinal pulling force, and the gantry top plate 7 and the gantry pressing plate 8 can be used for supporting and fixing a hydraulic jack applying normal pressure.

For example, loading of different load forms of the tested piece (including loading of any one of a longitudinal thrust load, a longitudinal tensile load and a normal pressure load, and loading of any combination form of a plurality of loads of the longitudinal thrust load, the longitudinal tensile load and the normal pressure load) can be realized through opening and closing of corresponding valves in the speed regulation stop valve 4. For example, under the condition that all valves of the speed regulation stop valve 4 are opened, loading of a longitudinal thrust load, a longitudinal tensile load and a normal pressure load of a tested piece can be realized at the same time; when the valve corresponding to the first hydraulic jack in the speed regulation stop valve 4 is opened and other valves are closed, the loading of the longitudinal thrust load of the tested piece can be realized.

According to an embodiment of the present invention, the apparatus further comprises a load cell 19 disposed between the second hydraulic jack 13 and the tension clamp bracket 6 for measuring the magnitude of the applied load.

Thereby, the magnitude of the applied load can be measured in real time.

According to an embodiment of the invention, the device further comprises a display 17 connected to said load cell 19 for displaying in real time the magnitude of the measured load.

Thereby, the magnitude of the applied load can be monitored in real time.

According to an embodiment of the present invention, as shown in fig. 2A and 2B, one end of the tooling plate 20 may be fixed between the push clamp bottom plate 21 and the push clamp upper plate 22 by a through-hole bolt; as shown in fig. 3A and 3B, the other end of the tooling plate 20 may be fixed between the tension clamp base plate 23 and the tension clamp upper plate 24 by through-hole bolts.

For example, when the first hydraulic jack 10 applies a load under hydraulic pressure, the load is transmitted to the tool plate 20 through the push clamp bottom plate 21 and the push clamp top plate 22, and the tool plate 20 transmits the load to the tested piece 28, wherein the load is in the form of a longitudinal thrust load for the tested piece 28. When the second hydraulic jack 13 applies a load under the hydraulic action, the load is transmitted to the second connecting piece 26 through the pull clamp top plate 25, the second connecting piece 26 transmits the load to the pull clamp upper plate 24, the pull clamp upper plate 24 transmits the load to the tooling plate 20, the tooling plate 20 transmits the load to the tested piece 28, and the load is in the form of longitudinal tensile load for the tested piece 28.

Fig. 4 is an axial view of a partial structure of a structural strength testing apparatus according to an embodiment of the present invention.

Fig. 5 is a front view of a partial structure of a structural strength testing apparatus according to an embodiment of the present invention.

According to an embodiment of the present invention, as shown in fig. 4 to 5, the number of the gantry top plate 7 and the third hydraulic jacks 12 may be two, wherein,

the device also comprises a first connecting pipe 3, a second connecting pipe 14, a third connecting pipe 15, a fourth connecting pipe 16 and a fifth connecting pipe 18, wherein the hydraulic pump 2 is connected with the speed regulation stop valve 4 through the first connecting pipe 3, the speed regulation stop valve 4 is connected with the first hydraulic jack 10 through the second connecting pipe 14, is connected with the second hydraulic jack 13 through the third connecting pipe 15, and is respectively connected with the two third hydraulic jacks 12 through the fourth connecting pipe 16 and the fifth connecting pipe 18.

That is, the first nipple 3, the second nipple 14, the third nipple 15, the fourth nipple 16, and the fifth nipple 18 are used to provide a hydraulic flow path.

As can be seen from fig. 4 to 5, when the two third hydraulic jacks apply loads under hydraulic pressure, the upper sides of the third hydraulic jacks are fixed by the gantry top plate 7, so that the loads can be transmitted to the tested piece 28 through the gantry pressure plate 8, and the loads are normal pressure loads for the tested piece 28, namely, the loads are vertical to the surface of the tested piece 28.

For example, the normal pressure load application position may be changed by moving the position of the gantry top plate.

It should be understood by those skilled in the art that the number of the third hydraulic jacks and the gantry top plate is only exemplary and not intended to limit the present invention.

According to an embodiment of the present invention, the apparatus further comprises a transition plate 27 disposed between the operation table 1 and the tested object 28.

That is, the tested object 28 may be fixed by the transition plate 27, and the mechanical interface between the transition plate 27 and the tested object 28 may be designed according to the actual tested object structure, which is not limited by the present invention.

By providing the transition plate 27 on the operation table 1 and disposing the test piece 28 on the transition plate 27, the test piece 28 can be better protected.

According to an embodiment of the present invention, the first connecting member 9 and the second connecting member 26 are both screw rods.

That is, the gantry top plate 7 can be fixed to the operation table 1 by a screw rod as the first connecting member 9, and the clamp top plate 25 can be connected to the clamp upper plate 24 by a screw rod as the second connecting member 26. For example, as shown in fig. 3A and 3B, the pinch top plate 25 may be connected to the pinch top plate 24 by two lead screws.

According to an embodiment of the invention, the hydraulic pump is a manual hydraulic pump or an electric hydraulic pump.

Fig. 6 is a schematic structural diagram of a gantry top plate according to an embodiment of the invention.

As shown in fig. 6, the lower part of the gantry top plate is provided with a groove which can be used for arranging a third hydraulic jack.

The sample 28 illustrated in fig. 7 is a frame structure, and the upper surface may have a groove for disposing the tooling plate 20, but this is merely exemplary and not intended to limit the present invention. One end (left side in fig. 7) of the tooling plate 20 is provided with a through hole for connecting the tooling plate with the push clamp top plate and the push clamp bottom plate, and the other end (right side in fig. 7) is also provided with a through hole for connecting the tooling plate with the pull clamp top plate and the pull clamp bottom plate. The tool plate 20 may be fixed in the groove of the test piece 28 by a bolt or may be fixed in the test piece 28 by an adhesive.

Alternatively, the upper surface of the tested piece 28 may be a surface without a groove, the tool plate 20 may be directly disposed on the upper surface of the tested piece 28, and the gantry pressing plate may be disposed on the tool plate 20.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "above … …", "above … …", "above … … upper surface", "above", etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A structural strength test device is characterized by comprising an operation table board (1), a hydraulic pump (2), a speed regulation stop valve (4), a push clamp support (5), a pull clamp support (6), a plurality of gantry top plates (7), a gantry pressing plate (8), a first connecting piece (9), a first hydraulic jack (10), a second hydraulic jack (13), a plurality of third hydraulic jacks (12), a tooling plate (20), a push clamp bottom plate (21), a push clamp upper plate (22), a pull clamp bottom plate (23), a pull clamp upper plate (24), a pull clamp top plate (25) and a second connecting piece (26), wherein a tested piece (28), the push clamp support (5) and the pull clamp support (6) are arranged on the operation table board (1), the speed regulation stop valve (4) divides hydraulic pressure of a channel output by the hydraulic pump (2) into multi-channel hydraulic pressure and respectively provides the hydraulic pressure to the first hydraulic jack (10), the second hydraulic jack (13) and the third hydraulic jacks (12) to control the hydraulic channels of the first hydraulic jack (10) to be in contact with the push clamp bottom plate (5) and control the push clamp plate (22) to act on one side of the push clamp support (5) and the push clamp plate (22), the second hydraulic jack (13) is arranged on the pull-clamp support (6), one side of the second hydraulic jack is in contact with the pull-clamp support (6), the other side of the second hydraulic jack is in contact with the pull-clamp top plate (25), the pull-clamp top plate (25) is used for applying longitudinal tensile load to the tested piece (28) under the action of hydraulic pressure, the pull-clamp top plate (25) is connected with the pull-clamp upper plate (24) through the second connecting piece (26), the tooling plate (20) is arranged on the tested piece (28), one end of the tooling plate is connected with the push-clamp bottom plate (21) and the push-clamp upper plate (22), the other end of the tooling plate is connected with the pull-clamp bottom plate (23) and the pull-clamp upper plate (24), the gantry pressing plate (8) is arranged on the tested piece (28) provided with the tooling plate (20), a plurality of the gantry top plates (7) are arranged on the gantry pressing plate (8) and are connected with the operation table board (1) through the first connecting piece (9), a groove (12) is arranged in each top plate (7), and the groove is used for applying normal pressure load to the hydraulic jack (28).

2. The device according to claim 1, characterized in that it further comprises a load cell (19) arranged between said second hydraulic jack (13) and said tension clamp bracket (6) for measuring the magnitude of the applied load.

3. A device according to claim 2, characterized in that it further comprises a display (17) connected to the load cell (19) for displaying the measured load magnitude in real time.

4. The device according to claim 1, characterized in that one end of the tooling plate (20) is fixed between the push clamp bottom plate (21) and the push clamp top plate (22) by through-hole bolts, and the other end of the tooling plate (20) is fixed between the pull clamp bottom plate (23) and the pull clamp top plate (24) by through-hole bolts.

5. Device according to claim 1, characterized in that the number of the gantry top plate (7) and the third hydraulic jack (12) are both two, wherein,

the device also comprises a first connecting pipe (3), a second connecting pipe (14), a third connecting pipe (15), a fourth connecting pipe (16) and a fifth connecting pipe (18), wherein the hydraulic pump (2) is connected with the speed regulation stop valve (4) through the first connecting pipe (3), the speed regulation stop valve (4) is connected with the first hydraulic jack (10) through the second connecting pipe (14), the fifth connecting pipe (18) is connected with the second hydraulic jack (13), and the fourth connecting pipe (16) is connected with the third connecting pipe (15) and the third hydraulic jack (12) are connected.

6. The device according to any one of claims 1-5, characterized in that it further comprises a transition plate (27) arranged between the operating table (1) and the test piece (28).

7. Device according to any one of claims 1 to 5, characterized in that said first connection (9) and said second connection (26) are screws.

8. The device of any one of claims 1-5, wherein the hydraulic pump is a manual hydraulic pump or an electric hydraulic pump.