CN216449132U - Heat insulation platform and vibration experiment device - Google Patents

Abstract

The utility model relates to an insulated platform, which comprises an insulated board, a first connecting piece and a second connecting piece. The heat insulation plate is arranged between the vibration table group and the heating plate, the first connecting piece is used for connecting the heat insulation plate and the vibration table group, and the length of the first connecting piece contained in the heat insulation plate is smaller than the thickness of the heat insulation plate; the second connecting piece and the first connecting piece are arranged at intervals, the second connecting piece is used for connecting the heat insulation plate and the heating plate, and the length of the second connecting piece contained in the heat insulation plate is smaller than the thickness of the heat insulation plate. When carrying out the vibration fatigue test experiment of long-time high temperature condition to the experimental sample, because first connecting piece not direct contact to the hot plate, the second connecting piece does not direct contact to the shaking table group, and the heat that the hot plate produced is difficult directly to transmit for the shaking table group through first connecting piece or second connecting piece. Therefore, the temperature of the vibrating table set is low, and the vibrating table set is not easy to damage; and the vibration signal transmitted to the experimental sample through the heat insulation plate is more accurate, and finally obtained experimental data is also more accurate.

Description

Heat insulation platform and vibration experiment device

Technical Field

The utility model relates to the technical field of vibration experiments, in particular to a heat insulation platform and a vibration experiment device.

Background

The modular semiconductor products have very good performance and are widely used in various industries. For example, IGBT (Insulated Gate Bipolar Transistor) modules have been widely used in new energy automobile industry, rail transit smart grid and other strategic new industry fields.

When the using performance of the modularized semiconductor product is researched, the vibration fatigue test of parameters such as different acceleration, frequency, amplitude, temperature and the like can be carried out on the product by simulating different using working conditions of the product, so that service life reports under different working conditions can be obtained. In the existing vibration experiment device, in order to avoid the situation that the table top is too heavy, so that the acceleration of the vibration is difficult to rise, the extension table top for bearing the heating plate and the experiment sample is usually processed to be as small and light as possible. Therefore, when the vibration fatigue performance of the experimental sample under the condition of long-time high temperature needs to be researched, the vibration experimental device is easy to transfer the temperature of the heating plate to the vibration table set, and further the vibration table set is easy to damage. For this reason, some vibration experimental apparatus can set up the asbestos pad between hot plate and shaking table group, but the asbestos pad is soft because of self nature to lead to transmitting the vibration signal of experimental sample self less accurate, the error of the experimental result that finally obtains is also great, so that the result accuracy degree of performance research to experimental sample is lower.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to be when carrying out vibration fatigue test under the long-time high temperature condition to current vibration experimental apparatus to the laboratory sample, and the asbestos pad can make the error of experimental result great, and then makes the lower technical problem of result accuracy of the performance research of laboratory sample, provides a thermal-insulated platform.

An insulated platform comprising an insulated panel, a first connector and a second connector; the heat insulation plate is arranged between the vibrating table group and the heating plate; the first connecting piece is used for connecting the heat insulation plate and the vibrating table group, and the length of the first connecting piece contained in the heat insulation plate is smaller than the thickness of the heat insulation plate; the second connecting piece and the first connecting piece are arranged at intervals, the second connecting piece is used for connecting the heat insulation plate and the heating plate, and the length of the second connecting piece in the heat insulation plate is smaller than the thickness of the heat insulation plate.

In one embodiment, the heat insulation plate is provided with a first connecting hole, and one end of the first connecting piece, which is far away from the vibrating table group, is accommodated in the first connecting hole and is connected with the hole wall of the first connecting hole.

In one embodiment, the first connection hole is a through hole penetrating through the heat insulation board; or the first connecting hole is a blind hole with an opening facing the vibrating table group.

In one embodiment, the number of the first connection holes is a plurality, the plurality of first connection holes are arranged at intervals along the length of the heat insulation board, and/or the plurality of first connection holes are arranged at intervals along the width of the heat insulation board.

In one embodiment, a side of the heat insulation plate, which is away from the vibrating table set, is provided with a second connecting hole, the second connecting hole is spaced from the first connecting hole, and one end of the second connecting piece, which is away from the heating plate, is accommodated in the second connecting hole and connected with a hole wall of the second connecting hole.

In one embodiment, the second connection hole is a blind hole opened toward the heating plate.

In one embodiment, the number of the second connection holes is multiple, multiple second connection holes are arranged at intervals along the length of the heat insulation plate, and/or multiple second connection holes are arranged at intervals along the width of the heat insulation plate.

The utility model also provides a vibration experiment device which can solve at least one technical problem.

The utility model provides a vibration experimental device, which comprises the heat insulation platform, a vibration platform group and a heating plate; the vibrating table group comprises an expansion table, the expansion table is provided with a third connecting hole, and one end of the first connecting piece, which is far away from the heat insulation plate, is accommodated in the third connecting hole and is connected with the hole wall of the third connecting hole; the heating plate is used for being connected with an experimental sample, one side of the heating plate, which deviates from the experimental sample, is provided with a fourth connecting hole, and one end, far away from the heat insulation plate, of the second connecting piece is held in the fourth connecting hole and is connected with the hole wall of the fourth connecting hole.

In one embodiment, the heating plate is electrically connected with the heating plate.

In one embodiment, the vibration table further comprises an air outlet assembly, and the air outlet assembly is connected with the vibration table set.

The utility model has the beneficial effects that:

according to the heat insulation platform provided by the utility model, when a vibration fatigue test experiment under a long-time high-temperature condition needs to be carried out on an experimental sample, the experimental sample is firstly connected with one side of the heating plate, which is away from the heat insulation plate, at the moment, the heating plate is heated to a preset temperature, the vibration table group generates vibration and transmits a vibration signal to the experimental sample through the heat insulation plate and the heating plate. Because the length of the first connecting piece accommodated in the heat insulation plate is smaller than the thickness of the heat insulation plate, the first connecting piece cannot directly contact with the heating plate, and heat generated by the heating plate is not easy to be transferred to the vibrating table group through the first connecting piece. The length of the second connecting piece accommodated in the heat insulation plate is smaller than the thickness of the heat insulation plate, so that the second connecting piece cannot directly contact the vibrating table set, and heat generated by the heating plate is not easy to directly transfer to the vibrating table set through the second connecting piece. Because the first connecting piece and the second connecting piece are arranged at intervals, the first connecting piece and the second connecting piece can not be in direct contact, so that the situation that the heating plate directly transfers heat for the second connecting piece to the first connecting piece and the vibrating table group is avoided, and finally, the temperature of the vibrating table group is low and the vibrating table group is not easy to damage is avoided. Meanwhile, because the heat insulation plate can not absorb a large amount of vibration energy, the vibration signals transmitted to the experimental sample by the heat insulation plate are accurate, the error of the obtained experimental data is small, and the accuracy of the experimental result is higher.

The utility model provides a vibration experiment device, wherein the heat insulation platform is arranged between a vibration table group and a heating plate. When the vibration fatigue test experiment under the condition of long-time high temperature is required to be carried out on the experimental sample, at least one technical effect can be realized.

Drawings

Fig. 1 is a schematic view of a vibration testing apparatus according to a first embodiment of the present invention;

FIG. 2 is a cross-sectional view of the vibration testing apparatus shown in FIG. 1, in which a heat insulating plate, a heating plate, and a test specimen are mounted on an extension stage and a moving coil;

FIG. 3 is a cross-sectional view of a heat shield in the vibration testing apparatus shown in FIG. 1;

FIG. 4 is a schematic view of a vibration testing apparatus according to a second embodiment of the present invention;

FIG. 5 is a cross-sectional view of the vibration testing apparatus shown in FIG. 4 with the heat shield, the heating plate, and the test specimen mounted on the extended stage and the moving coil;

fig. 6 is a sectional view of a heat insulating plate in the vibration testing apparatus shown in fig. 3.

Reference numerals: 100-a heat insulation plate; 110-a first connection hole; 120-a second connection hole; 210-a first connector; 220-a second connector; 230-a third connection; 240-fourth connection; 300-a vibrating table group; 310-an extension stage; 311-third connection hole; 312-fifth connection hole; 320-moving coil; 321-a sixth connecting hole; 330-a housing; 400-heating plate; 410-a fourth connection hole; 420-seventh connection hole; 500-temperature control box; 510-a display screen; 520-indicator light; 530-a temperature sensor; 600-experimental sample; 610-eighth connection hole; 700-air outlet assembly.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 6, fig. 1 is a schematic diagram illustrating a vibration testing apparatus according to a first embodiment of the present invention; FIG. 2 is a sectional view showing the mounting of the heat-insulating plate, the heating plate and the test specimen on the expansion stage and the moving coil in the vibration testing apparatus shown in FIG. 1; FIG. 3 shows a cross-sectional view of a heat shield in the vibration testing apparatus shown in FIG. 1; FIG. 4 is a schematic diagram of a vibration testing apparatus according to a second embodiment of the present invention; FIG. 5 is a sectional view showing the mounting of the heat-insulating plate, the heating plate and the test specimen on the expansion stage and the moving coil in the vibration testing apparatus shown in FIG. 4; fig. 6 shows a cross-sectional view of the heat insulating board in the vibration testing apparatus shown in fig. 3. An embodiment of the present invention provides an insulated platform, which includes an insulated panel 100, a first connector 210, and a second connector 220. The insulation plate 100 is provided between the vibration table set 300 and the heating plate 400; the first connecting member 210 is used for connecting the heat insulation board 100 and the vibrating table set 300, and the length of the first connecting member 210 accommodated in the heat insulation board 100 is less than the thickness of the heat insulation board 100; the second connector 220 is spaced apart from the first connector 210, the second connector 220 is used to connect the heat insulation plate 100 and the heating plate 400, and the length of the second connector 220 accommodated in the heat insulation plate 100 is less than the thickness of the heat insulation plate 100.

When the vibration experiment device composed of the heat insulation platform provided by the utility model is used for carrying out vibration fatigue test experiments on the experiment sample 600 under a long-time high-temperature condition, the experiment sample 600 is firstly connected with one side of the heating plate 400 departing from the heat insulation plate 100 through the fourth connecting piece 240, the heating plate 400 is heated to a preset temperature, the vibration table group 300 generates vibration, and a vibration signal is transmitted to the experiment sample 600 through the heat insulation plate 100 and the heating plate 400. Since the length of the first connector 210 accommodated in the heat insulation plate 100 is less than the thickness of the heat insulation plate 100, the first connector 210 does not directly contact the heating plate 400, and the heat generated from the heating plate 400 itself is not easily transferred to the vibration table set 300 through the first connector 210. The length of the second connector 220 accommodated in the heat insulation plate 100 is less than the thickness of the heat insulation plate 100, so that the second connector 220 does not directly contact the vibration table set 300, and the heat generated by the heating plate 400 is not easily directly transferred to the vibration table set 300 through the second connector 220. Because the first connecting piece 210 and the second connecting piece 220 are arranged at intervals, the first connecting piece 210 and the second connecting piece 220 can not be in direct contact, the heat transferred to the second connecting piece 220 by the heating plate 400 is prevented from being directly transferred to the first connecting piece 210 and the vibrating table group 300 again, and finally, the vibrating table group 300 is low in temperature and not easy to damage. Meanwhile, because the heat insulation plate 100 does not absorb a large amount of vibration energy, the vibration signal transmitted to the experimental sample 600 by the heat insulation plate 100 is accurate, the error of the obtained experimental data is small, and the accuracy of the experimental result is higher.

It should be noted that, because the heat insulation board 100 is connected to the vibration table set 300 and the heating plate 400 through the first connecting member 210 and the second connecting member 220, the connection reliability between the heat insulation board 100 and the vibration table set 300 and the heating plate 400 is effectively improved, when a long-time vibration experiment is performed, the connection between the heat insulation board 100 and the vibration table set 300 and the heating plate 400 is stable, and the experiment sample 600 and the heating plate 400 are difficult to be separated from the vibration table set 300, so that the whole experiment process is safer. Meanwhile, when the heating plate 400 or the vibrating table set 300 is damaged, the replacement operation can be very conveniently performed, and the situation that the heating plate 400 or the vibrating table set 300 can only be replaced by damaging the heat insulation plate 100 when the heat insulation plate 100 is glued with the vibrating table set 300 and the heating plate 400 is avoided. In one specific implementation, the first connector 210 and the second connector 220 are each threaded connectors, such as studs, bolts, and the like. Of course, in other embodiments, the first and second connectors 210 and 220 may be pins, etc., which are not limited to the above embodiments, as long as the function of stably connecting the heat insulation board 100 with the vibration table set 300 and the heating plate 400 can be achieved.

In one specific embodiment, the insulation board 100 is made of mica, and the insulation board 100 made of mica has a good insulation effect and is safer, so that the risk that asbestos is easy to volatilize carcinogenic substances under a long-time high-temperature condition when the insulation board 100 is made of materials such as asbestos pads is effectively reduced. Of course, in other embodiments, the thermal shield 100 may be made of quartz, which is not limited thereto.

In one embodiment, the experimental sample 600 is a modular semiconductor product, such as an IGBT module, which is a modular semiconductor product formed by bridge-packaging an IGBT and a FWD (free wheeling diode) through a specific circuit, and has very excellent performance, and thus is widely used. Especially in the field of new energy vehicles, the IGBT module is used as a core technical component of devices such as electric vehicles and charging piles, and accounts for nearly 10% of the cost of electric vehicles and about 20% of the cost of charging piles, so that the IGBT module is very important for the research on the service performance of the IGBT module.

In one specific embodiment, the experimental sample 600 is a welding type IGBT module, and a vibration experiment device composed of the heat insulation platform provided by the utility model can perform a vibration fatigue experiment on the welding strength of the welding position of the IGBT module under a high temperature condition for a long time, so that the purpose of researching the vibration fatigue of the welding type IGBT module is realized, the influence of different welding parameters on the welding strength is further determined, and finally, a relevant reference suggestion can be provided for improving the intelligent operation and maintenance technology of the electric vehicle. Specifically, the welding type IGBT module is of a model FF150R12ME3G, and includes three half-bridge modules connected in parallel, three upper tube IGBT chips, three lower tube IGBT chips, and six anti-parallel diode chips. Of course, in other embodiments, the experimental sample 600 may also be other modular semiconductor products, which is not limited to this, and as long as the experimental sample 600 needs to obtain the vibration fatigue experiment results under different experimental conditions, the vibration experiment apparatus provided by the thermal insulation platform provided by the present invention may be used.

When the service performance of the IGBT module is researched, vibration fatigue tests of parameters such as different acceleration, frequency, amplitude and temperature can be carried out on the new energy automobile by simulating different operation working conditions of the new energy automobile, so that service life reports under different working conditions can be obtained. When the vibration experiment device composed of the heat insulation platform provided by the utility model is used for carrying out vibration fatigue test experiments on the IGBT module under a long-time high-temperature condition, the IGBT module is firstly connected with one side of the heating plate 400 departing from the heat insulation plate 100 through the fourth connecting piece 240, and the heat insulation plate 100 is connected with the vibration platform group 300 and the heating plate 400 through the first connecting piece 210 and the second connecting piece 220. At this time, the heating plate 400 is heated to a preset temperature, and the switch of the vibration table set 300 is turned on, so that the vibration table set 300 generates vibration and transmits a vibration signal to the IGBT module through the insulation plate 100 and the heating plate 400. Since the length of the first connector 210 accommodated in the heat insulation plate 100 is less than the thickness of the heat insulation plate 100, the first connector 210 does not directly contact the heating plate 400, and the heat generated from the heating plate 400 itself is not easily transferred to the vibration table set 300 through the first connector 210. The length of the second connector 220 accommodated in the heat insulation board 100 is less than the thickness of the heat insulation board 100, so that the second connector 220 does not directly contact the shaking table set 300, and the heat generated by the heating plate 400 is not easily transferred to the shaking table set 300 through the second connector 220. Because the first connecting piece 210 and the second connecting piece 220 are arranged at intervals, the first connecting piece 210 and the second connecting piece 220 can not be in direct contact, the heat transferred to the second connecting piece 220 by the heating plate 400 is prevented from being directly transferred to the first connecting piece 210 and the vibrating table group 300 again, and finally, the vibrating table group 300 is low in temperature and not easy to damage. Meanwhile, because the heat insulation plate 100 can not absorb a large amount of vibration energy, the vibration signal transmitted to the IGBT module by the heat insulation plate 100 is accurate, the error of the finally obtained experimental data of the IGBT module obtained under different working conditions is small, and the accuracy of the experimental result is higher.

Referring to fig. 1 to fig. 6, the heat insulation board 100 of the heat insulation platform of the vibration experiment apparatus provided in the embodiment of the utility model is provided with a first connection hole 110, and one end of the first connection member 210 away from the vibration table set 300 is accommodated in the first connection hole 110 and connected to a hole wall of the first connection hole 110. When the vibrating table assembly 300 is out of order and needs to be repaired or maintained, the heat insulation board 100 and the vibrating table assembly 300 can be detached only by separating the first connecting member 210 from the hole wall of the first connecting hole 110, which is very simple and convenient.

Referring to fig. 4-6, a first connection hole 110 of the thermal insulation platform of the vibration testing apparatus according to the second embodiment of the present invention is a through hole penetrating through the thermal insulation board 100. Since the first connection holes 110 are through holes, when it is required to mount the heat insulation board 100 on the vibration table set 300, the first connection members 210 can be conveniently inserted through the first connection holes 110 to be connected with the hole walls of the third connection holes 311 provided on the vibration table set 300. In one embodiment, the first connecting holes 110 are stepped threaded holes, and the first connecting members 210 are bolts, so that the installation is convenient and the heat transfer can be effectively reduced.

Referring to fig. 1-3, the first connection hole 110 of the thermal insulation platform of the vibration testing apparatus according to the first embodiment of the present invention is a blind hole with an opening facing the vibration table set 300. Through setting up first connecting hole 110 as the blind hole of opening orientation shaking table group 300 for set up the heat of the hot plate 400 of heat insulating board 100 top and be difficult to transmit for first connecting piece 210, can effectively reduce the heat of transmitting for shaking table group 300 through first connecting piece 210, shaking table group 300's temperature is lower, difficult emergence damage.

Referring to fig. 1 to 6, the number of the first connection holes 110 of the thermal insulation platform of the vibration experiment apparatus according to the first and second embodiments of the present invention is multiple, and the multiple first connection holes 110 are spaced along the length of the thermal insulation board 100. Due to the plurality of first connection holes 110, the connection stability between the heat insulation plate 100 and the vibration table set 300 is higher, the heat insulation plate and the vibration table set are not easy to separate under the condition of long-time vibration, and the stability of the whole vibration experiment device is higher. In one specific embodiment, when a vibration experiment of displacement along the width direction of the insulation board 100 is performed on the experimental sample 600, since the plurality of first connection holes 110 are arranged along the length of the insulation board 100 at intervals, in the experiment process, the insulation board 100 is displaced along the length direction of the insulation board 100 relative to the vibrating table set 300 due to self-vibration, the influence on the result of the vibration experiment is small, the error of the obtained experimental data is small, and the accuracy of the experimental result is higher.

In some of these embodiments, a plurality of first connection apertures 110 are spaced along the width of the heat shield 100. Due to the plurality of first connection holes 110, the connection stability between the heat insulation plate 100 and the vibration table set 300 is higher, the heat insulation plate and the vibration table set are not easy to separate under the condition of long-time vibration, and the stability of the whole vibration experiment device is higher. In one specific embodiment, when a vibration experiment of displacement along the length direction of the heat insulation plate 100 is performed on the experimental sample 600, since the plurality of first connection holes 110 are arranged along the width interval of the heat insulation plate 100, in the experiment process, the heat insulation plate 100 is displaced along the width direction of the heat insulation plate 100 relative to the vibrating table set 300 due to self vibration, the influence on the result of the vibration experiment is small, the error of the obtained experimental data is small, and the accuracy of the experimental result is high.

In other embodiments, the plurality of first connection holes 110 are spaced apart along the length and width of the heat shield 100. When the vibration test of relatively severe displacement in the length direction and the width direction is performed on the test sample 600, the connection stability between the insulation board 100 and the vibration table set 300 is high.

Referring to fig. 1 to 6, a side of the heat insulation plate 100 of the heat insulation platform of the vibration experiment apparatus according to the first and second embodiments of the present invention, which is away from the vibration table set 300, is provided with a second connection hole 120, the second connection hole 120 is spaced from the first connection hole 110, and an end of the second connection member 220, which is away from the heating plate 400, is accommodated in the second connection hole 120 and connected to a hole wall of the second connection hole 120. When the heat insulation board 100 and the heating plate 400 need to be detached, the heat insulation board 100 and the heating plate 400 can be detached only by separating the second connecting member 220 from the hole wall of the second connecting hole 120, which is very simple and convenient.

Referring to fig. 1 to 6, the second connecting hole 120 of the thermal insulation platform of the vibration testing apparatus according to the embodiment of the present invention is a blind hole with an opening facing the heating plate 400. Because the second connecting hole 120 is the blind hole of opening towards hot plate 400, the one end of second connecting piece 220 is connected with the pore wall of second connecting hole 120, and the other end of second connecting piece 220 is connected with hot plate 400, therefore when carrying out long-time high temperature experiment to experimental sample 600, second connecting piece 220 is difficult to transmit the heat of hot plate 400 self for shaking table group 300 through second connecting piece 220, and shaking table group 300's temperature is lower, is difficult for taking place the damage. In one embodiment, the second connecting hole 120 is a blind hole with threads inside, and the second connecting member 220 is a stud, so that the installation is convenient.

Referring to fig. 1 to 6, the number of the second connection holes 120 of the thermal insulation platform of the vibration experiment apparatus according to the first and second embodiments of the present invention is multiple, and the multiple second connection holes 120 are spaced along the length of the thermal insulation plate 100. Because the plurality of second connection holes 120 are formed and the plurality of second connection holes 120 are spaced along the length direction of the heat insulation plate 100, the connection stability between the heat insulation plate 100 and the heating plate 400 is higher, the heat insulation plate 100 and the heating plate 400 are not easy to separate under a long-time high-temperature vibration experiment condition, the stability of the whole vibration experiment apparatus is better, and the unsafe situation that the two are separated due to connection failure of part of the second connection members 220 under a long-time high-temperature condition can be effectively reduced. Of course, in some embodiments, a plurality of second connecting holes 120 may be spaced along the width of the heat shield 100. Alternatively, in still other embodiments, a plurality of second coupling holes 120 are spaced apart along the length and width of the heat shield 100.

Referring to fig. 1, 2, 4 and 5, the plurality of first connection holes 110 on the heat insulation plate 100 of the heat insulation platform according to the embodiment of the present invention are respectively disposed at two sides of the plurality of second connection holes 120, and the plurality of first connection holes 110 are disposed at the periphery of the projection plane of the heating plate 400 projected on the heat insulation plate 100 along the right upper side thereof, so as to prevent heat generated by the heating plate 400 from being transferred to the vibration table set 300 through the first connection members 210 in the first connection holes 110 to the maximum extent. In one specific embodiment, the number of the first connection holes 110 is four, and the number of the second connection holes 120 is two, wherein two first connection holes 110 are disposed on the left side of two second connection holes 120, and two first connection holes 110 are disposed on the right side of two second connection holes 120. The number of the first coupling pieces 210 is adapted to the number of the first coupling holes 110, and the number of the second coupling pieces 220 is adapted to the number of the second coupling holes 120. Of course, in other embodiments, the number of the first connection holes 110 may be six, eight, etc., and the number of the second connection holes 120 may be four, six, etc., without limitation, which may be adaptively modified according to the size of the heat insulation board 100 and the size of the heating plate 400.

Referring to fig. 1, fig. 2, fig. 4 and fig. 5, the present invention further provides a vibration testing apparatus, which includes the above-mentioned heat insulation platform, further includes a vibration table set 300 and a heating plate 400. The vibration table set 300 comprises an extension table 310, the extension table 310 is provided with a third connecting hole 311, one end of the first connecting piece 210, which is far away from the heat insulation plate 100, is accommodated in the third connecting hole 311 and is connected with the hole wall of the third connecting hole 311; the heating plate 400 is used for being connected with the experimental sample 600, one side of the heating plate 400 departing from the experimental sample 600 is provided with a fourth connecting hole 410, and one end of the second connecting member 220, which is far away from the heat insulation plate 100, is accommodated in the fourth connecting hole 410 and connected with the hole wall of the fourth connecting hole 410. By providing the third connection hole 311 on the extension table 310, the first connection element 210 is connected to the hole wall of the first connection hole 110 and the hole wall of the third connection hole 311, so as to connect the thermal insulation platform to the vibration table set 300. Through setting up fourth connecting hole 410 in the one side that hot plate 400 deviates from experimental sample 600, second connecting piece 220 is connected through the pore wall with second connecting hole 120 and the pore wall of fourth connecting hole 410, and then realizes being connected of thermal-insulated platform and hot plate 400, unusual simple and convenient. When the vibrating table set 300 or the heating plate 400 is out of order or needs maintenance after a long-term use, the trouble and maintenance can be performed only by separating the first connecting member 210 from the hole wall of the third connecting hole 311 or separating the second connecting member 220 from the hole wall of the fourth connecting hole 410.

Referring to fig. 1, fig. 2, fig. 4 and fig. 5, the vibration testing apparatus according to the embodiment of the present invention further includes a fourth connecting member 240, a seventh connecting hole 420 is disposed on a side of the heating plate 400 away from the thermal insulation plate 100, an eighth connecting hole 610 is disposed on the test sample 600, one end of the fourth connecting member 240 is connected to a hole wall of the seventh connecting hole 420, and the other end of the fourth connecting member 240 is connected to a hole wall of the eighth connecting hole 610. When the experiment sample 600 needs to be subjected to the vibration fatigue experiment, the experiment sample 600 is fixed on the heating plate 400 through the fourth connecting member 240, and the operation is convenient and the disassembly is easy. In one specific embodiment, the fourth connecting member 240 is a stud, and the seventh connecting hole 420 and the eighth connecting hole 610 are blind holes provided with threads.

In one specific embodiment, the extension table 310 is made of a magnesium alloy or an aluminum alloy material, and has a high strength-to-weight ratio, and the entire extension table 310 has a light weight, so that the entire vibrating table set 300 has a light weight. When a vibration fatigue test experiment is carried out, the acceleration of vibration is easy to rise, the error of experimental data obtained by the experiment is small, and the accuracy of experimental research results is high.

In one embodiment, the vibrating table set 300 further includes a moving coil 320, the moving coil 320 is connected to a side of the extension table 310 facing away from the heat insulation board 100, and the moving coil 320 itself generates vibration and transmits the vibration to the extension table 310. The maximum operating temperature of the moving coil 320 cannot exceed 50 ℃ and the maximum load is 120 kg. Since the maximum operating temperature of the moving coil 320 cannot exceed 50 ℃, in a vibration fatigue test of a high temperature for a long time, the heat of the heating plate 400 is difficult to be transferred to the expansion table 310 and the moving coil 320 through the heat insulation plate 100, so that the temperature of the moving coil 320 is low, and the moving coil 320 is not easy to be damaged.

Referring to fig. 1, 2, 4 and 5, the vibration experiment apparatus according to the embodiment of the present invention further includes a third connecting member 230, a fifth connecting hole 312 is disposed on a side of the expansion platform 310 away from the thermal insulation board 100, a sixth connecting hole 321 is disposed on a side of the moving coil 320 close to the expansion platform 310, one end of the third connecting member 230 is connected to a hole wall of the fifth connecting hole 312, and the other end of the third connecting member 230 is connected to a hole wall of the sixth connecting hole 321. When the extension table 310 needs to be installed on the moving coil 320, the operation is convenient and the detachment is easy through the fourth connecting piece 240. In one specific embodiment, the third connecting member 230 is a stud, and the fifth connecting hole 312 and the sixth connecting hole 321 are blind holes provided with threads. Since the fifth connection hole 312 is a blind hole, the fifth connection hole 312 does not directly contact the heat insulation plate 100, so that heat generated from the heat insulation plate 100 can be reduced to be transferred to the third connection member 230 and finally to the moving coil 320 through the fifth connection hole 312, and the moving coil 320 has a low temperature and is not easily damaged by over-temperature.

In one embodiment, the vibrating table set 300 further includes a power amplifier having protection and interlock functions for output over voltage, output over current, amplifier over temperature, moving coil 320 over displacement, extension table 310 over temperature, cooling system, etc. faults.

In one embodiment, the heating plate 400 is made of an aluminum alloy or magnesium alloy material with three heating rods inside. Because the heating plate 400 is made of aluminum alloy, the heating plate is light and convenient, and the acceleration of vibration is easy to rise, the vibration signal transmitted to the experimental sample 600 by the vibrating table group 300 through the heating plate 400 is accurate; and the heat conduction effect of the heating plate 400 is also good.

It should be noted that, because the expanding table 310 and the heating plate 400 are designed to make the heating speed in the vibration experiment process higher, both are made of aluminum alloy or magnesium alloy, so that both have higher thermal conductivity, strong thermal conductivity and fast heat transfer speed. When the vibration experiment is performed on the experimental sample 600 under a high temperature condition for a long time, the heat of the heating plate 400 is not easily transferred to the moving coil 320 of the vibrating table assembly 300 through the heat insulating plate 100, the temperature of the moving coil 320 can be always kept at a lower temperature, and the moving coil 320 is not easily damaged.

Referring to fig. 1 and 4, the vibration experiment apparatus according to the first and second embodiments of the present invention further includes a temperature control box 500, and the temperature control box 500 is electrically connected to the heating plate 400. The temperature control box 500 serves to control the heating temperature of the heating plate 400 and to keep the heating plate 400 at a constant temperature. Specifically, the temperature control box 500 is provided with a display screen 510, and the display screen 510 is used for displaying the heating temperature of the heating plate 400. The temperature control box 500 is further provided with an indicator lamp 520, and the indicator lamp 520 is used to indicate the temperature rising state or the constant temperature state of the heating plate 400. In one specific embodiment, the number of the indicator lights 520 is two, the two indicator lights 520 are red and green, respectively, and when the heating plate 400 is in the heating state, the red indicator light 520 is turned on; when the heating plate 400 is in a constant temperature state, the green indicator light 520 is on, which is convenient for a user to observe and use. Temperature control box 500 still is provided with temperature sensor 530, and temperature sensor 530 is connected with hot plate 400 electricity, and temperature sensor 530 can give temperature control box 500 with the temperature transfer of hot plate 400 in real time, utilizes temperature sensor 530 to form closed loop control, and control hot plate 400 temperature that can be fine for the temperature of hot plate 400 is more accurate. In one specific embodiment, the power of the temperature control box 500 is 3kW, the precision is 0.3%, and devices such as a solid-state relay, a high-precision temperature controller, and a heat sink are further built in the temperature control box. Through the temperature control box 500 electrically connected with the heating plate 400, the heating plate 400 heats the IGBT module disposed above the same for studying the vibration fatigue strength of the IGBT module at different temperatures.

In the vibration experiment apparatus provided in the embodiment of the present invention, the vibration table set 300 further includes a vibration controller. The vibration control instrument can set parameters such as vibration amplitude, acceleration and frequency, and then design, test and contrastively analyze the influence of each vibration parameter on the vibration fatigue of the experimental sample 600. In one specific embodiment, the vibration controller can control the moving coil 320 and the extension stage 310 to generate vertical vibration, and of course, in other embodiments, the vibration controller can also control the moving coil 320 and the extension stage 310 to generate horizontal vibration according to the experiment requirement, so that the local vibration experiment apparatus can perform a multi-directional vibration fatigue experiment on the experiment sample 600. It should be noted that, the direction of the vibration generated by the vibration controller is not limited, and the vibration controller may be designed according to experimental requirements.

Referring to fig. 1 and 4, the vibration testing apparatus provided in the first and second embodiments of the present invention further includes an air outlet assembly 700, and the air outlet assembly 700 is connected to the vibration table set 300. The air outlet assembly 700 is used for dissipating heat of the vibrating table set 300 in the operation process of the vibrating table set 300, so that the temperature of the whole vibrating table set 300 is crossed, and the moving coil 320 of the vibrating table set 300 is not easy to damage. In one specific embodiment, the air outlet assembly 700 is a cooling fan, the cooling fan adopts a new air path design, and an impeller of the cooling fan adopts a forward-bent multi-wing impeller, so that the heat dissipation effect of the whole vibrating table set 300 is better.

The vibration experiment device provided by the embodiment of the utility model further comprises a static parameter testing system component, the static parameter testing system component is connected with the experiment sample 600, and the static parameter testing system component can test the parameter changes of the experiment sample 600, such as threshold voltage, saturation voltage drop, diode voltage drop and the like, so that the use condition of the experiment sample 600 under different vibration fatigue experiment conditions is further analyzed. In one specific embodiment, the static parametric test system component is connected to the welding-type IGBT module, and the static parametric test system component can test parameters such as gate threshold voltage, off-leakage current, gate leakage current, saturation drop, and the like of the welding-type IGBT module. And monitoring the change of parameters such as threshold voltage, saturation voltage drop, diode voltage drop and the like of the welding type IGBT module before and after vibration by using the static parameter testing system assembly, and analyzing the vibration fatigue of the welding type IGBT module.

Referring to fig. 1 and 4, the vibration experiment apparatus provided in the embodiment of the present invention further includes a housing 330, the housing 330 is connected to the moving coil 320, the housing 330 is provided with an installation cavity, the moving coil 320 is accommodated in the installation cavity and connected to the housing 330, and the housing 330 can reduce a contact area between a worker and the moving coil 320 generating vibration, so that the entire apparatus is safer.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. An insulated platform, characterized in that it comprises a heat insulating panel (100), a first connector (210) and a second connector (220);

the heat insulation plate (100) is arranged between the vibrating table group (300) and the heating plate (400);

the first connecting piece (210) is used for connecting the heat insulation board (100) and the vibrating table group (300), and the length of the first connecting piece (210) accommodated in the heat insulation board (100) is smaller than the thickness of the heat insulation board (100);

the second connecting piece (220) and the first connecting piece (210) are arranged at intervals, the second connecting piece (220) is used for connecting the heat insulation board (100) and the heating plate (400), and the length of the second connecting piece (220) in the heat insulation board (100) is smaller than the thickness of the heat insulation board (100).

2. The thermally insulated platform of claim 1, characterized in that the thermally insulated panel (100) is provided with a first connection hole (110), and an end of the first connecting member (210) remote from the vibrating table set (300) is received in the first connection hole (110) and connected with a hole wall of the first connection hole (110).

3. The thermally insulated platform of claim 2, characterized in that the first connection hole (110) is a through hole passing through the thermal insulation board (100); or the first connecting hole (110) is a blind hole with an opening facing the vibrating table group (300).

4. The thermal platform of any of claims 2 or 3, wherein the number of the first connection holes (110) is plural, a plurality of the first connection holes (110) are spaced along the length of the thermal insulation board (100), and/or a plurality of the first connection holes (110) are spaced along the width of the thermal insulation board (100).

5. The heat insulation platform according to claim 4, characterized in that a side of the heat insulation board (100) facing away from the vibrating table set (300) is provided with a second connection hole (120), the second connection hole (120) is spaced apart from the first connection hole (110), and an end of the second connection member (220) away from the heating plate (400) is accommodated in the second connection hole (120) and connected with a hole wall of the second connection hole (120).

6. The thermally insulated platform of claim 5, characterized in that the second connecting hole (120) is a blind hole opening towards the heating plate (400).

7. The insulated platform of any of claims 5 or 6, wherein the number of the second attachment apertures (120) is plural, a plurality of the second attachment apertures (120) are spaced along the length of the insulated panel (100), and/or a plurality of the second attachment apertures (120) are spaced along the width of the insulated panel (100).

8. A vibration testing apparatus comprising the thermally insulated platform of any of claims 1-7, further comprising a vibrating table set (300) and a heating plate (400);

the vibrating table set (300) comprises an expansion table (310), the expansion table (310) is provided with a third connecting hole (311), one end, far away from the heat insulation plate (100), of the first connecting piece (210) is accommodated in the third connecting hole (311) and is connected with the hole wall of the third connecting hole (311);

the heating plate (400) is used for being connected with an experimental sample (600), one side of the heating plate (400) deviating from the experimental sample (600) is provided with a fourth connecting hole (410), the second connecting piece (220) is far away from one end of the heat insulation plate (100) is contained in the fourth connecting hole (410) and is connected with the hole wall of the fourth connecting hole (410).

9. The vibration testing apparatus according to claim 8, further comprising a temperature control box (500), wherein the temperature control box (500) is electrically connected to the heating plate (400).

10. The vibration experiment apparatus according to any one of claims 8 or 9, further comprising an air outlet assembly (700), wherein the air outlet assembly (700) is connected with the vibration table set (300).

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