Three-axis vibration test device and centrifugal vibration test system

Abstract

The utility model relates to the technical field of mechanical environment tests, and discloses a triaxial vibration test device and a centrifugal vibration test system. The triaxial vibration test device comprises a mounting rack, a workbench, an X-direction vibration mechanism, a Y-direction vibration mechanism and a Z-direction vibration mechanism, the X-direction vibration mechanism comprises an X-direction vibration generator, an X-direction supporting air bag and a first X-direction decoupling assembly, and the X-direction vibration generator and the X-direction supporting air bag are located on the two sides of the workbench in the Y direction respectively; a first X-direction decoupling assembly is arranged between the X-direction vibration generator and the workbench. The Y-direction vibration mechanism comprises a Y-direction vibration generator, a Y-direction supporting air bag and a first Y-direction decoupling assembly, the Y-direction vibration generator and the Y-direction supporting air bag are located on the two sides of the workbench in the X direction correspondingly, and the first Y-direction decoupling assembly is arranged between the Y-direction vibration generator and the workbench; the Z-direction vibration mechanism is configured to drive the workbench to vibrate in the Z direction. The triaxial vibration test device can realize rapid centering of the workbench.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical environment testing, in particular to a triaxial vibration testing device and a centrifugal vibration testing system. Background Art

[0002] With the rapid development of aerospace technology, spacecraft, as an important tool for human exploration of the universe, have increasingly higher performance and reliability requirements. In the design and development process of spacecraft, vibration testing is one of the key links in evaluating spacecraft performance. Among them, the triaxial vibration test is an important means to simulate the various vibration environments that a spacecraft may encounter during launch, flight and return, in order to test its structural strength, functional stability and safety. Figure 1 As shown, the triaxial vibration test device in the prior art includes a workbench 100', an X-axis vibration generator 200', a Y-axis vibration generator 300' and a Z-axis vibration generator 400', the workbench 100' is used to carry the test piece, the X-axis vibration generator 200', the Y-axis vibration generator 300' and the Z-axis vibration generator 400' are used to drive the workbench 100' to vibrate in corresponding directions.

[0003] Compared with the traditional uniaxial vibration test device, the triaxial vibration test device can achieve the effect of one-time installation of spacecraft products and simultaneous loading and excitation in three axes. On the one hand, it will more realistically reproduce the actual use environment of spacecraft products, and on the other hand, it can also reduce the time of repeated lifting in traditional uniaxial tests, and the efficiency of mechanical tests will be greatly improved. The workbench 100' of the triaxial vibration test device in the prior art is only in a vibration environment, and each vibration generator is correspondingly provided with a central airbag. As long as the three central airbags are controlled in a balanced position, the balance of the workbench 100' can be achieved. However, for spacecraft products, in addition to considering the vibration environment, the centrifugal environment must also be considered. When the workbench 100' is subjected to vibration testing in a centrifugal environment, its test environment is relatively complex, different central airbags have different loads, and some airbags also have large lateral forces, which makes it difficult to adjust the balance of the workbench 100'.

[0004] Therefore, it is urgent to propose a triaxial vibration test device to solve the above problems. Utility Model Content

[0005] Based on the above, the purpose of the utility model is to provide a three-axis vibration test device and a centrifugal vibration test system, which can perform vibration tests on products in a centrifugal environment to truly simulate the product's usage environment and achieve rapid balance adjustment of the workbench.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A triaxial vibration test device, comprising:

[0008] a mounting frame configured to connect to a centrifugal arm;

[0009] Workbench;

[0010] An X-direction vibration mechanism is arranged on the mounting frame, the X-direction vibration mechanism comprises an X-direction vibration generator, an X-direction supporting airbag and a first X-direction decoupling component, the X-direction vibration generator and the X-direction supporting airbag are respectively located on both sides of the workbench along the Y direction, and the output end of the X-direction vibration generator is connected to the workbench through the first X-direction decoupling component to drive the workbench to vibrate along the X direction;

[0011] A Y-direction vibration mechanism is arranged on the mounting frame, the Y-direction vibration mechanism comprises a Y-direction vibration generator, a Y-direction supporting airbag and a first Y-direction decoupling component, the Y-direction vibration generator and the Y-direction supporting airbag are respectively located on both sides of the workbench along the X direction, and the output end of the Y-direction vibration generator is connected to the workbench through the first Y-direction decoupling component to drive the workbench to vibrate along the Y direction;

[0012] A Z-direction vibration mechanism, disposed on the mounting frame, the Z-direction vibration mechanism being configured to drive the workbench to vibrate along the Z direction;

[0013] The X direction, the Y direction and the Z direction are perpendicular to each other.

[0014] As a preferred solution of the triaxial vibration test device provided by the utility model, the first X-direction decoupling component and the first Y-direction decoupling component both include:

[0015] Intermediate connecting piece;

[0016] A first slide rail, arranged on one side of the intermediate connecting member;

[0017] A second slide rail connected to the workbench and extending along the Z direction;

[0018] A decoupling slider, one end of which is slidably matched with the first slide rail, and the other end of which is slidably matched with the second slide rail;

[0019] Among them, the output end of the X-direction vibration generator is connected to the intermediate connecting piece of the first X-direction decoupling component, and the output end of the Y-direction vibration generator is connected to the intermediate connecting piece of the first Y-direction decoupling component; the first slide rail of the first X-direction decoupling component extends along the Y direction, and the first slide rail of the first Y-direction decoupling component extends along the X direction.

[0020] As a preferred solution of the triaxial vibration test device provided by the utility model, the triaxial vibration test device also includes an air source, which is used to supply air to the X-direction central airbag of the X-direction vibration mechanism, the X-direction support airbag, the Y-direction central airbag of the Y-direction vibration mechanism, the Y-direction support airbag and the Z-direction central airbag of the Z-direction vibration mechanism.

[0021] As a preferred solution of the triaxial vibration test device provided by the utility model, the triaxial vibration test device also includes an air supply component, and the air supply component includes:

[0022] A three-way air supply valve, the inlet of which is connected to the outlet of the air source;

[0023] A first pressure reducing valve, disposed between the gas supply three-way valve and the gas source;

[0024] A Y-direction solenoid valve, wherein the air inlet of the Y-direction solenoid valve is connected to the first outlet of the air supply three-way valve, the first air outlet of the Y-direction solenoid valve is connected to the Y-direction supporting airbag, and the second air outlet of the Y-direction solenoid valve is connected to the Y-direction central airbag;

[0025] An X-direction solenoid valve, wherein a first air outlet of the X-direction solenoid valve is connected to the X-direction supporting airbag, and a second air outlet of the X-direction solenoid valve is connected to the X-direction central airbag;

[0026] A Z-direction solenoid valve, wherein an air outlet of the Z-direction solenoid valve is connected to the Z-direction central airbag;

[0027] A second pressure reducing valve, wherein the inlet of the second pressure reducing valve is connected to the second outlet of the air supply three-way valve, and the outlet of the second pressure reducing valve is connected to both the air inlet of the X-direction solenoid valve and the air inlet of the Z-direction solenoid valve.

[0028] As a preferred solution of the three-axis vibration test device provided by the utility model, a first throttle valve is arranged between the first air outlet of the Y-direction solenoid valve and the Y-direction supporting airbag; and / or a second throttle valve is arranged between the second air outlet of the Y-direction solenoid valve and the Y-direction central airbag; and / or a third throttle valve is arranged between the first air outlet of the X-direction solenoid valve and the X-direction supporting airbag; and / or a fourth throttle valve is arranged between the second air outlet of the X-direction solenoid valve and the X-direction central airbag; and / or a fifth throttle valve is arranged between the air outlet of the Z-direction solenoid valve and the Z-direction central airbag.

[0029] As a preferred solution of the triaxial vibration test device provided by the utility model, the air source is provided with a pressure gauge for detecting the internal air pressure thereof.

[0030] As a preferred solution of the triaxial vibration test device provided by the utility model, the X-direction support airbag is connected to the workbench through a first fastener; and / or the Y-direction support airbag is connected to the workbench through a second fastener.

[0031] To achieve the above-mentioned purpose, the utility model also provides a centrifugal vibration test system, including a centrifugal environment driving device and the triaxial vibration test device as described above, wherein the centrifugal environment driving device includes a centrifugal driver and a centrifugal rotating arm, wherein the output end of the centrifugal driver is connected to the middle part of the centrifugal rotating arm to drive the centrifugal rotating arm to rotate, and the mounting frame is connected to one end of the centrifugal rotating arm.

[0032] As a preferred solution of the centrifugal vibration test system provided by the utility model, the Y-axis vibration generator is arranged on a side of the mounting frame close to the centrifugal drive, and the Y-axis support airbag is arranged on a side of the mounting frame away from the centrifugal drive;

[0033] The X-direction supporting airbag is connected to the workbench via a second X-direction decoupling component, and the Y-direction supporting airbag is connected to the workbench via a second Y-direction decoupling component.

[0034] As a preferred solution of the centrifugal vibration test system provided by the utility model, the Y-direction vibration generator is arranged on the side of the mounting frame away from the centrifugal driver, and the Y-direction support airbag is arranged on the side of the mounting frame close to the centrifugal driver.

[0035] The beneficial effects of the utility model are:

[0036] The utility model provides a triaxial vibration test device and a centrifugal vibration test system. The X-direction support airbag can cooperate with the X-direction center airbag of the X-direction vibration mechanism to realize the balance of the workbench in the X direction. The Y-direction support airbag can cooperate with the Y-direction center airbag of the Y-direction vibration mechanism to realize the balance of the workbench in the Y direction. By setting a first X-direction decoupling component and a first Y-direction decoupling component, the phenomenon of jamming of the workbench when the position is moved due to the inflation or deflation of the support airbag and the center airbag can be avoided, thereby realizing rapid centering of the workbench. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0038] Figure 1 It is a structural schematic diagram of a triaxial vibration test device provided by the prior art;

[0039] Figure 2 is a structural schematic diagram of a centrifugal vibration test system provided by an embodiment of the present invention;

[0040] Figure 3 yes Figure 2 Schematic diagram of the local structure;

[0041] Figure 4 It is a first structural schematic diagram of a triaxial vibration test device provided by an embodiment of the present invention;

[0042] Figure 5 yes Figure 4 Only the schematic diagram of the structure of the airbag and the workbench is shown;

[0043] Figure 6 is a second structural schematic diagram of a triaxial vibration test device provided by an embodiment of the present invention;

[0044] Figure 7 yes Figure 6 Only the schematic diagram of the structure of the airbag and the workbench is shown;

[0045] Figure 8 Schematic diagram of the gas path structure of the triaxial vibration test device provided by an embodiment of the present invention;

[0046] Fig. 9 It is a schematic diagram of the structure of the mounting frame provided by an embodiment of the present invention.

[0047] In the figure:

[0048] 100', workbench; 200', X-axis vibration generator; 300', Y-axis vibration generator; 400', Z-axis vibration generator;

[0049] 100, triaxial vibration test device; 110, workbench; 120, X-axis vibration mechanism; 121, X-axis vibration generator; 122, X-axis support airbag; 123, first X-axis decoupling assembly; 1231, intermediate connector; 1232, first slide rail; 1233, decoupling slider; 1234, second slide rail; 124, second X-axis decoupling assembly; 125, first fastener; 126, X-axis central airbag; 130, Y-axis vibration mechanism; 131, Y-axis vibration generator; 132, Y-axis support airbag; 133, first Y-axis decoupling assembly; 134, second Y-axis decoupling assembly; 135, second fastener; 136, Y-axis central airbag; 140, mounting frame; 141, U-shaped bracket; 1411, horizontal arm; 1412, vertical arm; 142, support plate; 1421, first avoidance hole; 1422, second avoidance hole; 1423, third avoidance hole; 143, reinforcing rib; 150, air source; 160, air supply assembly; 161, air supply three-way valve; 162, Y-direction solenoid valve; 163, first pressure reducing valve; 164, X-direction solenoid valve; 165, Z-direction solenoid valve; 166, second pressure reducing valve; 1671, first throttle valve; 1672, second throttle valve; 1673, third throttle valve; 1674, fourth throttle valve; 1675, fifth throttle valve; 170, pressure gauge; 180, one-way valve; 190, Z-direction center airbag;

[0050] 200, centrifugal environment driving device; 210, centrifugal drive; 220, centrifugal rotating arm;

[0051] 300. heat dissipation device;

[0052] 400. Power amplifier. DETAILED DESCRIPTION

[0053] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0054] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0056] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0057] Figure 2 The schematic diagram of the structure of the centrifugal vibration test system provided in this embodiment is shown. Figure 3 Shows Figure 2 Schematic diagram of the local structure. Figure 2-Figure 3 As shown, this embodiment provides a centrifugal vibration test system, which includes a triaxial vibration test device 100, a centrifugal environment driving device 200 and a heat dissipation device 300. The triaxial vibration test device 100 includes a mounting frame 140, a workbench 110, an X-axis vibration mechanism 120, a Y-axis vibration mechanism 130 and a Z-axis vibration mechanism (not shown in the figure), the X-axis vibration mechanism 120, the Y-axis vibration mechanism 130 and the Z-axis vibration mechanism are all arranged on the mounting frame 140, and the workbench 110 is used to carry The test piece, the X-direction vibration mechanism 120 is configured to drive the workbench 110 to vibrate along the X direction, the Y-direction vibration mechanism 130 is configured to drive the workbench 110 to vibrate along the Y direction, and the Z-direction vibration mechanism is configured to drive the workbench 110 to vibrate along the Z direction; the centrifugal environment driving device 200 includes a centrifugal driver 210 and a centrifugal arm 220, the output end of the centrifugal driver 210 is connected to the middle part of the centrifugal arm 220 to drive the centrifugal arm 220 to rotate, and the mounting frame 140 is connected to one end of the centrifugal arm 220.

[0058] It should be noted that, in this embodiment, the X direction is the width direction of the centrifugal rotating arm 220, the Y direction is the length direction of the centrifugal rotating arm 220, and the Z direction is the height direction of the centrifugal rotating arm 220. When the centrifugal rotating arm 220 rotates, the Z direction is the direction of the rotation axis. The test piece in this embodiment specifically refers to a spacecraft product. Of course, in other embodiments, the test piece can also be other products that need to work in a centrifugal environment and a vibration environment.

[0059] The centrifugal vibration test system provided in this embodiment can realize a vibration test on the test piece carried on the workbench 110 in a centrifugal environment through the mutual cooperation between the triaxial vibration test device 100 and the centrifugal environment drive device 200, so as to truly simulate the use environment of the test piece and ensure the accuracy of the test result. Optionally, the centrifugal drive 210 is a centrifuge, which is easy to operate and safe and reliable.

[0060] To ensure the working stability of the entire centrifugal vibration test system, the centrifugal environment driving device 200 further includes a counterweight structure, which is disposed at one end of the centrifugal rotating arm 220 away from the triaxial vibration test device 100. This embodiment does not limit the specific structure of the counterweight structure.

[0061] The centrifugal vibration test system further includes a heat dissipation device 300, which is disposed on the centrifugal rotating arm 220 and is configured to dissipate heat for the triaxial vibration test device 100, and timely dissipate the heat generated by each vibration mechanism when working, so as to prevent high temperature from affecting the performance of each vibration mechanism. It should be noted that the present embodiment does not limit the specific structure of the heat dissipation device 300, and any heat dissipation device in the prior art that can dissipate heat for the triaxial vibration test device 100 is within the protection scope of the present embodiment.

[0062] Figure 4 FIG. 1 shows a first structural schematic diagram of the triaxial vibration test device 100 provided in this embodiment. Figure 4 Combined with Figure 2As shown, the X-direction vibration mechanism 120 includes an X-direction vibration generator 121, an X-direction supporting airbag 122 and a first X-direction decoupling component 123. The X-direction vibration generator 121 and the X-direction supporting airbag 122 are respectively located on both sides of the workbench 110 along the Y direction, and the output end of the X-direction vibration generator 121 is connected to the workbench 110 through the first X-direction decoupling component 123; the Y-direction vibration mechanism 130 includes a Y-direction vibration generator 131, a Y-direction supporting airbag 132 and a first Y-direction decoupling component 133. The Y-direction vibration generator 131 and the Y-direction supporting airbag 132 are respectively located on both sides of the workbench 110 along the X direction, and the output end of the Y-direction vibration generator 131 is connected to the workbench 110 through the first Y-direction decoupling component 133. In a centrifugal environment, the X-direction support airbag 122 can cooperate with the X-direction center airbag 126 of the X-direction vibration mechanism 120 to achieve the balance of the workbench 110 in the X direction, and the Y-direction support airbag 132 can cooperate with the Y-direction center airbag 136 of the Y-direction vibration mechanism 130 to achieve the balance of the workbench 110 in the Y direction.

[0063] It should be noted that the X-direction central airbag 126 of the X-direction vibration mechanism 120, the Y-direction central airbag 136 of the Y-direction vibration mechanism 130, and the Z-direction central airbag 190 of the Z-direction vibration mechanism are all prior arts, and the specific structure and working principle of the above-mentioned central airbags are not repeated in this embodiment.

[0064] Figure 5 yes Figure 4 Only the schematic diagram of the structure of the airbag and the workbench 110 is shown. Figure 5 Combined with Figure 4 As shown, the first X-direction decoupling assembly 123 includes an intermediate connecting member 1231, a first slide rail 1232, a decoupling slider 1233 and a second slide rail 1234. One side of the intermediate connecting member 1231 is connected to the output end of the X-direction vibration generator 121. The first slide rail 1232 is arranged on the other side of the intermediate connecting member 1231 and extends along the Y direction. The second slide rail 1234 is connected to the workbench 110 and extends along the Z direction. One end of the decoupling slider 1233 is slidably matched with the first slide rail 1232, and the other end of the decoupling slider 1233 is slidably matched with the second slide rail 1234. With this arrangement, the workbench 110 can be adjusted in position in the Y direction and the Z direction as the X-direction support airbag 122 and the X-direction center airbag 126 are inflated or deflated, so that it can quickly reach a balanced state.

[0065] It can be understood that the specific structure of the first Y-direction decoupling assembly 133 is the same as the specific structure of the first X-direction decoupling assembly 123, except that the intermediate connecting member 1231 of the first Y-direction decoupling assembly 133 is arranged at the output end of the Y-direction vibration generator 131, and the first slide rail 1232 of the first Y-direction decoupling assembly 133 extends along the X-direction. By providing the first Y-direction decoupling assembly 133, the workbench 110 can be adjusted in position in the X-direction and the Z-direction along with the inflation or deflation process of the Y-direction support airbag 132 and the Y-direction center airbag 136, so as to quickly reach a balanced state.

[0066] It should be noted that the Z-direction vibration mechanism includes a Z-direction vibration generator and a Z-direction decoupling assembly, and the Z-direction vibration generator is connected to the bottom of the workbench 110 through the Z-direction decoupling assembly. This embodiment does not limit the specific structure of the Z-direction decoupling assembly, and all Z-direction decoupling assemblies that can achieve Z-direction decoupling in the prior art are within the protection scope of this embodiment.

[0067] Figure 6 FIG. 2 shows a second structural schematic diagram of the triaxial vibration test device 100 provided in this embodiment. Figure 6 Combined with Figure 4 As shown, in one example, the Y-axis vibration generator 131 is disposed on a side of the mounting frame 140 close to the centrifugal drive 210, and the Y-axis support airbag 132 is located on a side of the mounting frame 140 away from the centrifugal drive 210. In a second example, the Y-axis vibration generator 131 is disposed on a side of the mounting frame 140 away from the centrifugal drive 210, and the Y-axis support airbag 132 is located on a side of the mounting frame 140 close to the centrifugal drive 210. Since the volume of the Y-axis vibration generator 131 is much larger than the volume of the Y-axis support airbag 132, the spacing between the workbench 110 and the drive shaft of the centrifugal drive 210 in the first example is larger than the spacing between the workbench 110 and the drive shaft of the centrifugal drive 210 in the second example.

[0068] It should be noted that when the workbench 110 is centrifugally rotating, its rotation radius r is the distance between the center of the workbench 110 and the drive shaft of the centrifugal driver 210. According to the centrifugal force calculation formula F=ω 2 It can be seen that if the test piece needs to reach the preset centrifugal force, the centrifugal acceleration of the workbench 110 in the first example is smaller than the centrifugal acceleration of the workbench 110 in the second example. The smaller the centrifugal acceleration, the smaller the impact on the heat dissipation fan of the heat dissipation device 300, and the smaller the back pressure generated in the air duct of the heat dissipation device 300, which is more conducive to heat dissipation.

[0069] In the second example ( Figure 6), when the centrifugal drive 210 reaches a preset speed, the workbench 110 will move away from the centrifugal drive 210 under the action of centrifugal force. At this time, the Y-direction central airbag 136 bears the centrifugal force generated by the workbench 110, and the X-direction central airbag 126, the X-direction support airbag 122, and the Y-direction support airbag 132 only need a small amount of gas. As long as the friction between the first slide rail 1232 and the decoupling slider 1233 and the decoupling slider 1233 and the second slide rail 1234 in the decoupling assembly in the corresponding direction is overcome, centering can be achieved. When the centrifugal drive 210 switches from the preset speed to the shutdown state, the Y-direction central airbag 136 still maintains high pressure to push the workbench 110 toward the direction close to the centrifugal drive 210. At this time, the setting of the Y-direction support airbag 132 can ensure the safety of the workbench 110 in this process. In addition, during the start-up and stop phases of the centrifuge, the workbench 110 still has centrifugal acceleration in the X direction, but the centrifugal acceleration is not very large, and the X-direction support airbag 122 and the X-direction center airbag 126 only need to select appropriate pressure according to the current centrifugal acceleration value to ensure the safety of the workbench 110. Therefore, for the second example, the X-direction support airbag 122 and the Y-direction support airbag 132 only need a small amount of gas, and the lateral stiffness they are subjected to is also low, and although the lateral stiffness of the Y-direction center airbag 136 is very high, due to the setting of the first Y-direction decoupling component 133, the normal operation of the entire centrifugal vibration test system can still be guaranteed, and its safety during the working process can be guaranteed.

[0070] Figure 7 yes Figure 6 Only the schematic diagram of the structure of the airbag and the workbench 110 is shown. Figure 7 Combined with Figure 6 As shown, the X-axis support airbag 122 is connected to the workbench 110 via a first fastener 125; the Y-axis support airbag 132 is connected to the workbench 110 via a second fastener 135. In this embodiment, the first fastener 125 and the second fastener 135 are both fastening screws, and the screw connection has the advantages of fastening and convenient disassembly.

[0071] Likewise, in the first example ( Figure 4), when the centrifugal drive 210 reaches a preset speed, the workbench 110 will move away from the centrifugal drive 210 under the action of centrifugal force, and at this time, the Y-axis support airbag 132 bears the centrifugal force generated by the workbench 110. At this time, the pressure of the Y-axis support airbag 132 is usually between 0.4MPa and 0.5MPa, resulting in a large lateral stiffness. In order to ensure the safety of the centrifugal vibration test system, in this example, the X-axis support airbag 122 is connected to the workbench 110 through the second X-axis decoupling component 124, and the Y-axis support airbag 132 is connected to the workbench 110 through the second Y-axis decoupling component 134. The provision of the second X-axis decoupling component 124 and the second Y-axis decoupling component 134 can avoid the workbench 110 from being stuck when the position of the workbench 110 moves due to the increase of pressure and lateral stiffness caused by the X-axis support airbag 122 or the Y-axis support airbag 132 due to centrifugal force, thereby realizing the rapid centering of the workbench 110.

[0072] It should be noted that the specific structure of the second X-direction decoupling component 124 is the same as the specific structure of the first X-direction decoupling component 123, and the specific structure of the second Y-direction decoupling component 134 is the same as the specific structure of the first Y-direction decoupling component 133. The specific structures of the second X-direction decoupling component 124 and the second Y-direction decoupling component 134 are not repeated in this embodiment.

[0073] It should be explained that, since the centrifugal rotation radius of the workbench 110 in the first example is greater than the centrifugal rotation radius of the workbench 110 in the second example, when the test pieces in the two examples reach the same centrifugal acceleration, the rotation speed of the centrifugal driver 210 in the first example is lower than the rotation speed of the centrifugal driver 210 in the second example. Therefore, in the first example, the centrifugal driver 210 has less influence on the heat dissipation fan of the heat dissipation device 300 when working, and the back pressure generated in the connecting air duct of the heat dissipation device 300 is smaller, which is more conducive to heat dissipation. However, since the second X-direction decoupling component 124 and the second Y-direction decoupling component 134 need to be set in the first example, the weight of the entire triaxial vibration test device 100 will be larger. Under the condition of achieving the same centrifugal force, the maximum acceleration value that the system can reach is smaller. In addition, the setting of the additional decoupling component will increase the manufacturing cost. Therefore, those skilled in the art can select the above two examples according to actual needs.

[0074] Continue as Figure 2-Figure 4As shown, the triaxial vibration test device 100 also includes an air source 150, which is used to supply air to the X-direction central airbag 126, the X-direction support airbag 122, the Y-direction central airbag 136, the Y-direction support airbag 132, and the Z-direction central airbag 190. The distance between the air source 150 and the centrifugal driver 210 is smaller than the distance between the air source 150 and the mounting frame 140. This setting can reduce the rotation radius of the air source 150 during centrifugal rotation, thereby reducing the influence of centrifugal force on the air source 150, ensuring that it has good working performance, and extending the service life of the air source 150. This embodiment does not limit the distance between the air source 150 and the centrifugal driver 210. The operator can shorten the distance between the air source 150 and the centrifugal driver 210 as much as possible according to actual needs without affecting the operation of other components.

[0075] In this embodiment, considering the use pressure of each airbag, the volume and installation space of the air source 150 and the working time of the centrifugal vibration test system, the air source 150 can be a high-pressure gas storage tank. The gas pressure in the high-pressure gas storage tank is greater than the maximum use pressure of each airbag.

[0076] Figure 7 FIG. 1 shows a schematic diagram of the gas path structure of the triaxial vibration test device 100 provided in this embodiment. Figure 7 Combined with Figure 4 and Figure 6 As shown, in order to ensure the stability and safety of the air supply from the air source 150 to each airbag, the triaxial vibration test device 100 also includes an air supply assembly, which includes an air supply three-way valve 161, a Y-direction solenoid valve 162, a first pressure reducing valve 163, an X-direction solenoid valve 164, a Z-direction solenoid valve 165, and a second pressure reducing valve 166. The inlet of the air supply three-way valve 161 is connected to the outlet of the air source 150; the first pressure reducing valve 163 is arranged between the air supply three-way valve 161 and the air source 150; the air inlet of the Y-direction solenoid valve 162 is connected to the first outlet of the air supply three-way valve 161, and the first pressure reducing valve 166 of the Y-direction solenoid valve 164 is connected to the second pressure reducing valve 166 of the Z-direction solenoid valve 165. The first air outlet is connected to the Y-direction support airbag 132, and the second air outlet of the Y-direction electromagnetic valve 162 is connected to the Y-direction central airbag 136; the first air outlet of the X-direction electromagnetic valve 164 is connected to the X-direction support airbag 122, and the second air outlet of the X-direction electromagnetic valve 164 is connected to the X-direction central airbag 126; the air outlet of the Z-direction electromagnetic valve 165 is connected to the Z-direction central airbag 190; the inlet of the second pressure reducing valve 166 is connected to the second outlet of the air supply three-way valve 161, and the outlet of the second pressure reducing valve 166 is connected to the air inlet of the X-direction electromagnetic valve 164 and the air inlet of the Z-direction electromagnetic valve 165. When the centrifugal vibration test system is working, the Y-direction support airbag 132 ( Figure 6 The first example shown) or the Y-direction center airbag 136 ( Figure 8The second example shown) bears the centrifugal force generated by the workbench 110, while the X-direction central airbag 126, the X-direction supporting airbag 122 and the Z-direction central airbag 190 only need a small amount of gas. Therefore, the first pressure reducing valve 163 is used to reduce the gas pressure in the high-pressure gas tank to the operating pressure of the Y-direction supporting airbag 132 or the Y-direction central airbag 136, and the second pressure reducing valve 166 is used to reduce the gas pressure at the outlet of the first pressure reducing valve 163 to the operating pressure of the X-direction central airbag 126, the X-direction supporting airbag 122 and the Z-direction central airbag 190, thereby ensuring the operating stability of the entire centrifugal vibration test system; the setting of the X-direction solenoid valve 164, the Y-direction solenoid valve 162 and the Z-direction solenoid valve 165 can realize the automatic deflation and inflation of each airbag.

[0077] It should be explained that the Z-direction central airbag 190 is responsible for lifting the workbench 110 upward. When the workbench 110 moves upward beyond the equilibrium position, the Z-direction central airbag 190 is deflated and can move downward to the equilibrium position under the action of the workbench 110's own weight. The balance of the workbench 110 in the X and Y directions requires the joint action between the X-direction central airbag 126 and the X-direction supporting airbag 122, and between the Y-direction central airbag 136 and the Y-direction supporting airbag 132.

[0078] Specifically, a position sensor (not shown in the figure) is also provided on the workbench 110, and the position sensor is used to determine whether the workbench 110 is in a balanced position. Figure 4 As shown, when the workbench 110 deviates to the right, the position sensor feeds back a signal to the controller of the centrifugal vibration test system, and the controller can control the X-direction solenoid valve 164 to deflate the X-direction center airbag 126 and inflate the X-direction support airbag 122; when the workbench 110 deviates to the left, the position sensor feeds back a signal to the controller of the centrifugal vibration test system, and the controller can control the X-direction solenoid valve 164 to inflate the X-direction center airbag 126 and deflate the X-direction support airbag 122; When the workbench 110 is biased toward one side away from the centrifugal drive 210, the position sensor feeds back a signal to the controller of the centrifugal vibration test system, and the controller can control the Y-direction solenoid valve 162 to inflate the Y-direction center airbag 136 and deflate the Y-direction support airbag 132 at the same time; when the workbench 110 is biased toward a side away from the centrifugal drive 210, the position sensor feeds back a signal to the controller of the centrifugal vibration test system, and the controller can control the Y-direction solenoid valve 162 to deflate the Y-direction center airbag 136 and inflate the Y-direction support airbag 132 at the same time.

[0079] Optionally, a pressure gauge 170 for detecting the internal air pressure is provided on the air source 150. The pressure gauge 170 is used to determine whether the gas pressure in the air source 150 is lower than the working pressure. At the same time, according to the pressure and volume of the gas in the air source 150, it can also be used to determine how long the gas inside can be used for the test, so as to remind the operator to fill the air source 150 in time.

[0080] Optionally, a one-way valve 180 is further provided at the inlet of the gas source 150. When the gas in the gas source 150 is insufficient, the outlet of the gas replenishing device can be connected to the one-way valve 180 to inflate the gas source 150. After the inflation is completed, due to the setting of the one-way valve 180, there will be no leakage at the inlet of the gas source 150.

[0081] Continue as Figure 2 and Figure 7 As shown, a first throttle valve 1671 is provided between the first air outlet of the Y-direction electromagnetic valve 162 and the Y-direction supporting airbag 132; and / or a second throttle valve 1672 is provided between the second air outlet of the Y-direction electromagnetic valve 162 and the Y-direction central airbag 136; and / or a third throttle valve 1673 is provided between the first air outlet of the X-direction electromagnetic valve 164 and the X-direction supporting airbag 122; and / or a fourth throttle valve 1674 is provided between the second air outlet of the X-direction electromagnetic valve 164 and the X-direction central airbag 126; and / or a fifth throttle valve 1675 is provided between the air outlet of the Z-direction electromagnetic valve 165 and the Z-direction central airbag 190. The throttle valves provided between each electromagnetic valve and the corresponding airbag can reduce the speed of inflation and deflation of each airbag to prevent the situation where the workbench 110 cannot be centered due to the excessive inflation and deflation speed, and can also improve the centering efficiency of the test system.

[0082] Optionally, the solenoid valves, three-way valves and pressure reducing valves are located close to the centrifugal drive 210 to reduce the influence of centrifugal force on them during rotation and extend the service life of the solenoid valves, three-way valves and pressure reducing valves.

[0083] It should be noted that in the second example ( Figure 8 ) as an example, when the triaxial vibration test device 100 is installed on the centrifugal arm 220 for operation, the workbench 110 is subjected to the centrifugal force, which will generate a force on the Y-direction central airbag 136, while the Y-direction support airbag 132 is actually not subjected to force. Therefore, the triaxial vibration test device 100 can also simulate a centrifugal environment under a ground environment, that is, the Y-direction support airbag 132 can be inflated so that the Y-direction support airbag 132 applies a suitable pressure to the workbench 110, and the pressure can be equivalent to the centrifugal force generated by the workbench 110, thereby simulating the centrifugal force on the Y-direction central airbag 136 under a centrifugal environment.

[0084] Fig. 9 FIG. 1 shows a schematic diagram of the structure of the mounting bracket 140 provided in this embodiment. Fig. 9 Combined with Figure 4 As shown, the mounting frame 140 includes a U-shaped bracket 141 and a support plate 142. The U-shaped bracket 141 includes a horizontal arm 1411 and two vertical arms 1412 respectively connected to the two ends of the horizontal arm 1411. The horizontal arm 1411 is connected to the centrifugal arm 220. The support plate 142 is arranged at a side opening of the U-shaped bracket 141 and is connected to the horizontal arm 1411 and the two vertical arms 1412. The support plate 142 is provided with a first avoidance hole 1421 for avoiding the X-direction vibration mechanism 120, a second avoidance hole 1422 for avoiding the Y-direction vibration mechanism 130, and a third avoidance hole 1423 for avoiding the Z-direction vibration mechanism.

[0085] Optionally, the horizontal arm 1411 and the vertical arm 1412 are I-beams. The horizontal arm 1411 and the vertical arm 1412, the horizontal arm 1411 and the support plate 142, and the vertical arm 1412 and the support plate 142 can be connected by welding. In order to reduce the direct force on the I-beam at the welding position, a sufficient effective weld area should be ensured during welding to ensure equipment safety.

[0086] Reinforcement ribs 143 are provided between the horizontal arm 1411 and the vertical arm 1412, between the horizontal arm 1411 and the support plate 142, and between the vertical arm 1412 and the support plate 142 to ensure the overall rigidity of the mounting frame 140 and prevent it from deforming due to excessive bending moment in a centrifugal environment. Optionally, the reinforcement ribs 143 may be angle steel. The reinforcement ribs 143 may be connected to the U-shaped bracket 141 and the support plate 142 by screws.

[0087] Continue as Figure 2 As shown, the centrifugal vibration test system also includes a power amplifier 400, which is arranged in the observation room. The power amplifier 400 is electrically connected to an external power supply, and its output line is connected to the centrifugal driver 210 through a slip ring, and the output port of the slip ring is connected to the workbench 110. This arrangement can prevent the output line of the power amplifier 400 from being entangled when the workbench 110 is centrifugally rotated.

[0088] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A triaxial vibration test device, characterized in that: include: A mounting frame (140) configured to connect to a centrifugal arm (220); Workbench (110); An X-direction vibration mechanism (120) is arranged on the mounting frame (140), the X-direction vibration mechanism (120) comprising an X-direction vibration generator (121), an X-direction supporting airbag (122) and a first X-direction decoupling component (123), the X-direction vibration generator (121) and the X-direction supporting airbag (122) being respectively located on both sides of the workbench (110) along the Y direction, and an output end of the X-direction vibration generator (121) is connected to the workbench (110) through the first X-direction decoupling component (123) to drive the workbench (110) to vibrate along the X direction; A Y-direction vibration mechanism (130) is arranged on the mounting frame (140), the Y-direction vibration mechanism (130) comprising a Y-direction vibration generator (131), a Y-direction supporting airbag (132) and a first Y-direction decoupling component (133), the Y-direction vibration generator (131) and the Y-direction supporting airbag (132) are respectively located on both sides of the workbench (110) along the X direction, and the output end of the Y-direction vibration generator (131) is connected to the workbench (110) through the first Y-direction decoupling component (133) to drive the workbench (110) to vibrate along the Y direction; A Z-direction vibration mechanism, disposed on the mounting frame (140), the Z-direction vibration mechanism being configured to drive the workbench (110) to vibrate along the Z direction; The X direction, the Y direction and the Z direction are perpendicular to each other.

2. The triaxial vibration test device according to claim 1, characterized in that: The first X-direction decoupling component (123) and the first Y-direction decoupling component (133) both include: Intermediate connecting member (1231); A first slide rail (1232) is arranged on one side of the intermediate connecting member (1231); A second slide rail (1234) connected to the workbench (110) and extending along the Z direction; a decoupling slider (1233), one end of the decoupling slider (1233) being slidably matched with the first slide rail (1232), and the other end of the decoupling slider (1233) being slidably matched with the second slide rail (1234); The output end of the X-direction vibration generator (121) is connected to the intermediate connecting piece (1231) of the first X-direction decoupling component (123), and the output end of the Y-direction vibration generator (131) is connected to the intermediate connecting piece (1231) of the first Y-direction decoupling component (133); the first slide rail (1232) of the first X-direction decoupling component (123) extends along the Y direction, and the first slide rail (1232) of the first Y-direction decoupling component (133) extends along the X direction.

3. The triaxial vibration test device according to claim 1, characterized in that: The triaxial vibration test device further comprises an air source (150), wherein the air source (150) is used to supply air to an X-direction central airbag (126) of the X-direction vibration mechanism (120), the X-direction support airbag (122), a Y-direction central airbag (136) of the Y-direction vibration mechanism (130), the Y-direction support airbag (132), and a Z-direction central airbag (190) of the Z-direction vibration mechanism.

4. The triaxial vibration test device according to claim 3, characterized in that: The triaxial vibration test device further comprises an air supply assembly (160), wherein the air supply assembly (160) comprises: A three-way air supply valve (161), wherein the inlet of the three-way air supply valve (161) is connected to the outlet of the air source (150); A first pressure reducing valve (163) is disposed between the gas supply three-way valve (161) and the gas source (150); A Y-direction solenoid valve (162), wherein an air inlet of the Y-direction solenoid valve (162) is connected to a first outlet of the air supply three-way valve (161), a first air outlet of the Y-direction solenoid valve (162) is connected to the Y-direction supporting airbag (132), and a second air outlet of the Y-direction solenoid valve (162) is connected to the Y-direction central airbag (136); An X-direction electromagnetic valve (164), wherein a first air outlet of the X-direction electromagnetic valve (164) is connected to the X-direction supporting airbag (122), and a second air outlet of the X-direction electromagnetic valve (164) is connected to the X-direction central airbag (126); A Z-direction solenoid valve (165), wherein an air outlet of the Z-direction solenoid valve (165) is connected to the Z-direction central airbag (190); A second pressure reducing valve (166), wherein the inlet of the second pressure reducing valve (166) is connected to the second outlet of the air supply three-way valve (161), and the outlet of the second pressure reducing valve (166) is connected to the air inlet of the X-direction solenoid valve (164) and the air inlet of the Z-direction solenoid valve (165).

5. The triaxial vibration test device according to claim 4, characterized in that: A first throttle valve (1671) is provided between the first air outlet of the Y-direction solenoid valve (162) and the Y-direction supporting airbag (132); and / or a second throttle valve (1672) is provided between the second air outlet of the Y-direction solenoid valve (162) and the Y-direction central airbag (136); and / or a third throttle valve (1673) is provided between the first air outlet of the X-direction solenoid valve (164) and the X-direction supporting airbag (122); and / or a fourth throttle valve (1674) is provided between the second air outlet of the X-direction solenoid valve (164) and the X-direction central airbag (126); and / or a fifth throttle valve (1675) is provided between the air outlet of the Z-direction solenoid valve (165) and the Z-direction central airbag (190).

6. The triaxial vibration test device according to claim 3, characterized in that: The gas source (150) is provided with a pressure gauge (170) for detecting the internal gas pressure thereof.

7. The triaxial vibration test device according to claim 1, characterized in that: The X-direction supporting airbag (122) is connected to the workbench (110) via a first fastener (125); and / or the Y-direction supporting airbag (132) is connected to the workbench (110) via a second fastener (135).

8. A centrifugal vibration test system, characterized in that: The invention comprises a centrifugal environment driving device (200) and a triaxial vibration test device as described in any one of claims 1 to 7, wherein the centrifugal environment driving device (200) comprises a centrifugal driver (210) and a centrifugal rotating arm (220), wherein an output end of the centrifugal driver (210) is connected to a middle portion of the centrifugal rotating arm (220) to drive the centrifugal rotating arm (220) to rotate, and the mounting frame (140) is connected to one end of the centrifugal rotating arm (220).

9. The centrifugal vibration test system according to claim 8, characterized in that: The Y-direction vibration generator (131) is arranged on a side of the mounting frame (140) close to the centrifugal driver (210), and the Y-direction support airbag (132) is arranged on a side of the mounting frame (140) away from the centrifugal driver (210); The X-direction supporting airbag (122) is connected to the workbench (110) via a second X-direction decoupling component (124), and the Y-direction supporting airbag (132) is connected to the workbench (110) via a second Y-direction decoupling component (134).

10. The centrifugal vibration test system according to claim 8, characterized in that: The Y-direction vibration generator (131) is arranged on a side of the mounting frame (140) away from the centrifugal driver (210), and the Y-direction support airbag (132) is arranged on a side of the mounting frame (140) close to the centrifugal driver (210).

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