A damping box of a multilayer composite gradient sandwich structure

Abstract

The application discloses a multi-layer composite gradient interlayer structure vibration reduction machine case, which comprises an upper cover plate, a rear panel, a first outer plate, a second outer plate, a front panel, a bottom plate and an interlayer assembly. The outermost plate of the machine case is made of high-strength aluminum alloy after anodic oxidation treatment, so that wear resistance and corrosion resistance are enhanced. The intermediate layer is a metal rubber interlayer made of metal wires with different wire diameters according to specific proportions and weaving modes. The metal rubber interlayer is close to the outer layer side with a fine wire diameter, which is used for more sensitively capturing and buffering high-frequency micro-vibration; the wire diameter close to the inner layer is slightly thick, which is used for mainly dealing with low-frequency large-amplitude vibration. The inner layer plate of the machine case is made of high-purity copper material, heat generated by internal hardware of the machine case is conducted to the metal rubber interlayer by using the heat conduction performance of the copper material, and then the heat is uniformly dispersed and transmitted to the outer aluminum alloy plate by the metal rubber interlayer, so that the effect of high-efficiency heat dissipation and all-around vibration reduction is realized.

Description

Technical Field

[0001] This invention belongs to the field of industrial chassis technology, and particularly relates to a vibration-damping chassis with a multi-layer composite gradient sandwich structure. Background Technology

[0002] With the rapid development of aerospace, precision instruments, and high-end equipment, electronic equipment enclosures are facing increasingly stringent vibration environments. Statistics show that vibration-induced failures of electronic components under complex operating conditions account for as much as 45%. While traditional metal enclosures possess excellent structural strength, their inherent high stiffness results in a vibration transmission rate exceeding 70%, making it difficult to meet the stringent requirements of precision equipment for micro-vibration environments. Existing rubber vibration isolation devices, although achieving vibration attenuation of 20-40 dB, still suffer from insufficient resistance to high and low temperatures (-60~200℃) and aging, leading to high performance degradation rates under spacecraft vibration radiation environments.

[0003] Metal Rubber (MR), a novel porous network metal elastomer, utilizes a three-dimensional interpenetrating network structure constructed through a stainless steel wire spiral winding and molding process. It combines the weather resistance of a metallic phase with the superelasticity of rubber (elastic modulus adjustable from 0.1 to 5 MPa), achieving a compression rebound rate exceeding 98%. Research indicates that MR can generate a unique "rigid-flexible coupling" effect under broadband vibration conditions, achieving a vibration energy conversion rate of up to 60% through the dry friction energy dissipation mechanism between metal wires. Currently, MR is not used as a vibration isolation layer for chassis.

[0004] The core problem facing current chassis vibration reduction design is that traditional rubber is difficult to adapt to complex working conditions with wide frequency bands and multi-directional random coupling. It is urgent to break through the technical bottlenecks of existing vibration reduction chassis in terms of vibration spectrum adaptability, environmental adaptability and service reliability through material-structure collaborative innovation.

[0005] Patent document CN107484379A discloses a general structure and method for improving vibration reduction, including a circuit board disposed within a chassis. The circuit board is mounted on a circuit board mounting bracket via fixing posts, and vibration damping components are also disposed within the circuit board mounting bracket. In this patent, the vibration damper can generally be made of materials such as silicone vibration dampers, metal rubber, or can be installed in the form of a vibration damping pad into this general structure.

[0006] Patent document CN114760807A discloses a server chassis and heat dissipation method integrating an ultrasonic atomizing phase change liquid cooling heat dissipation module, including a chassis body and a top cover plate, with components fixed and sealed by sealing gaskets and screws; the sealing gasket material can be silicone, polytetrafluoroethylene, nitrile rubber, metal rubber, etc.

[0007] The aforementioned patents all use metal rubber for vibration damping, but they do not solve the technical problem of improving the adaptability of the vibration spectrum of metal rubber, nor do they involve any settings that enhance the heat dissipation effect through metal rubber. Summary of the Invention

[0008] To solve the above-mentioned technical problems, the present invention provides a vibration damping chassis with a multi-layer composite gradient sandwich structure.

[0009] The present invention is achieved through the following technical solutions.

[0010] The present invention provides a multi-layer composite gradient sandwich structure vibration damping housing, comprising an upper cover plate, a rear panel, a first outer panel, a second outer panel, a front panel, a bottom plate, and a sandwich assembly. The upper cover plate is connected to the top of the rear panel, the first outer panel, the second outer panel, the front panel, and the sandwich assembly, respectively. The bottom plate is connected to the bottom of the rear panel, the first outer panel, the second outer panel, the front panel, and the sandwich assembly, respectively. The first outer panel and the second outer panel are disposed between the rear panel and the front panel, and the sandwich assembly is disposed on the first outer panel and the second outer panel, respectively.

[0011] Preferably, the sandwich assembly includes a first inner plate, a first sandwich layer, a second sandwich layer, and a second inner plate. The first inner plate is connected to a first outer plate, the first sandwich layer is disposed between the first inner plate and the first outer plate, the second inner plate is connected to the second outer plate, and the second sandwich layer is disposed between the second inner plate and the second outer plate.

[0012] Preferably, the first and second interlayers are made of filamentous material, and the diameter of the filamentous material increases sequentially from one side of the first and second interlayers to the other side of the first and second interlayers.

[0013] Preferably, the first and second interlayers are made of metal wire material, and the first and second inner plates are made of copper.

[0014] Preferably, the density of the first and second interlayers is 4-2 g / cm³ from the inside to the outside. 3 The range gradually decreases.

[0015] Preferably, both the first interlayer and the second interlayer include a snap-fit ​​portion and a protrusion portion, with the two sides of the protrusion portion respectively connected to the snap-fit ​​portion, and a slot provided on one side of the protrusion portion.

[0016] Preferably, the protrusion has an arc-shaped cross-section, and the snap-fit ​​portion has a rectangular cross-section.

[0017] Preferably, a plurality of limiting rods are provided on the first inner plate and the second inner plate, and weight reduction grooves are provided on the first inner plate and the second inner plate respectively.

[0018] Preferably, the first outer plate and the second outer plate are provided with a plurality of grooves.

[0019] Preferably, a handle is provided on the front panel.

[0020] The beneficial effects of this invention are as follows:

[0021] This invention incorporates multiple metal-rubber interlayers on the side panels of the chassis. The outermost layer is made of high-strength aluminum alloy with anodized finish, enhancing its wear resistance and corrosion resistance. The middle layers are metal-rubber interlayers made of metal wires of different diameters in a specific ratio and weaving pattern. The wire diameter is finer near the outer layer to more sensitively capture and buffer high-frequency, minute vibrations; the wire diameter is slightly thicker near the inner layer to primarily handle low-frequency, larger-amplitude vibrations. The inner chassis panel uses high-purity copper, utilizing its thermal conductivity to conduct heat generated by the internal hardware to the metal-rubber interlayer, which then evenly distributes and transfers the heat to the outer aluminum alloy plate, improving vibration spectrum compatibility and achieving efficient heat dissipation and all-around vibration reduction. This chassis is suitable for aerospace, precision instruments, and high-end equipment, providing a stable operating environment for electronic equipment and ensuring its reliability and stability. Attached Figure Description

[0022] Figure 1 This is an exploded view of the present invention;

[0023] Figure 2 This is the front view of the present invention;

[0024] Figure 3 This is the left view of the present invention;

[0025] Figure 4 This is a schematic diagram of the AA cross-section structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of region A of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the second outer plate of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the first inner plate of the present invention;

[0029] Figure 8 This is a schematic diagram of the structure of the second inner plate of the present invention;

[0030] Figure 9 This is a front view of the first interlayer of the present invention;

[0031] Figure 10 This is a top view of the first interlayer of the present invention;

[0032] Figure 11 This is a side view of the first interlayer of the present invention;

[0033] In the diagram: 1-Top cover plate, 2-Rear panel, 3-First inner panel, 4-First interlayer, 5-First outer panel, 6-Second outer panel, 7-Second interlayer, 8-Second inner panel, 9-Front panel, 11-Bottom plate, 13-Groove, 14-Limiting rod, 15-Weight reduction groove, 101-Snap-fit ​​part, 102-Protrusion, 103-Slot. Detailed Implementation

[0034] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0035] Example:

[0036] like Figures 1 to 11 As shown, a multi-layer composite gradient sandwich structure vibration damping housing includes an upper cover plate 1, a rear panel 2, a first outer panel 5, a second outer panel 6, a front panel 9, a bottom plate 11, and a sandwich assembly. The upper cover plate 1 is connected to the top of the rear panel 2, the first outer panel 5, the second outer panel 6, the front panel 9, and the sandwich assembly. The bottom plate 11 is connected to the bottom of the rear panel 2, the first outer panel 5, the second outer panel 6, the front panel 9, and the sandwich assembly. The first outer panel 5 and the second outer panel 6 are disposed between the rear panel 2 and the front panel 9, and both ends of the first outer panel 5 and the second outer panel 6 are connected to the rear panel 2 and the front panel 9, respectively. The sandwich assembly is disposed on the first outer panel 5 and the second outer panel 6. The first outer panel 5 and the second outer panel 6 have the same structure.

[0037] The top cover 1, rear panel 2, front panel 9, and bottom plate 11 are made of aluminum alloy, achieving a lightweight chassis. The chassis panels are fixed together with bolts.

[0038] The sandwich assembly includes a first inner plate 3, a first sandwich layer 4, a second sandwich layer 7, and a second inner plate 8. The first inner plate 3 is connected to a first outer plate 5. A plurality of first sandwich layers 4 are disposed between the first inner plate 3 and the first outer plate 5. The second inner plate 8 is connected to a second outer plate 6. A plurality of second sandwich layers 7 are disposed between the second inner plate 8 and the second outer plate 6. The first sandwich layers 4 and the second sandwich layers 7 are collectively referred to as metal-rubber sandwich layers. The metal-rubber sandwich layers are strip-shaped, and the first sandwich layers 4 and the second sandwich layers 7 have the same structure. The first inner plate 3 and the second inner plate 8 have the same structure.

[0039] The first interlayer 4 and the second interlayer 7 are both made of metal wires of different diameters. The metal wires are interwoven to form a highly elastic metal-rubber material. The diameter of the filaments increases sequentially from one side of the first interlayer 4 and the second interlayer 7 to the other side, ranging from 0.15mm to 0.3mm. Figure 9 As shown, the diameter of the metal wires in the metal-rubber interlayer gradually decreases along the Y-axis, and the density of the metal-rubber interlayer is 4-2 g / cm³ along the Y-axis. 3The range gradually decreases. The metal wires of different diameters are set in a specific ratio of 0.15mm wire diameter to 0.3mm wire diameter = 3:1. This setting allows the smaller diameter wires in the metal-rubber interlayer to more sensitively capture and buffer high-frequency micro-vibrations, while the larger diameter wires in the metal-rubber interlayer are mainly used to deal with low-frequency, larger-amplitude vibrations, thus buffering the internal components of the chassis.

[0040] For vibration transmission in multi-layered structures, vibration transmissibility can be used to measure their vibration reduction performance. Under simple harmonic vibration excitation, for a single-degree-of-freedom isolation system, the vibration transmissibility formula is:

[0041]

[0042] Where ξ is the damping ratio, and in a multilayer composite graded functional metal-rubber sandwich structure, the damping characteristics of the metal-rubber sandwich determine the overall damping ratio of the structure. The metal-rubber has a large damping capacity, which increases the damping ratio, thus affecting the vibration transmissibility. λ is the frequency ratio. ω is the excitation frequency, ω n This is the system's natural frequency.

[0043] In multilayer composite gradient functional metal-rubber sandwich structures, the equivalent damping ratio varies with structural and material properties because the metal-rubber is made of metal wires of different diameters in a specific ratio and weaving method. For example, metal-rubber with a finer wire diameter of 0.15 mm, located near the outer aluminum alloy layer, can more sensitively capture high-frequency micro-vibrations. Under high-frequency excitation (when λ is large), as the damping ratio ξ increases, according to the above formula, the vibration transmissibility T decreases, indicating that it can effectively suppress the transmission of high-frequency vibrations.

[0044] The first interlayer 4 and the second interlayer 7 are made of 06Cr17Ni12Mo2 stainless steel wire material, and the first inner plate 3 and the second inner plate 8 are made of copper, which has good thermal conductivity and conducts heat from inside the chassis to the first interlayer 4 and the second interlayer 7.

[0045] Both the first interlayer 4 and the second interlayer 7 include a snap-fit ​​portion 101 and a protrusion portion 102. The two sides of the protrusion portion 102 are respectively connected to the snap-fit ​​portion 101, and a slot 103 is provided on one side of the protrusion portion 102.

[0046] The protrusion 102 has an arc-shaped cross section and protrudes outward from the outside of the vibration damping housing to facilitate heat conduction. The snap-fit ​​part 101 has a rectangular cross section and is used to fix the metal-rubber interlayer.

[0047] A plurality of limiting rods 14 are provided on the first inner plate 3 and the second inner plate 8. The first inner plate 3 can be inserted into the slot 103 on the first interlayer 4 through the limiting rods 14 to realize the positioning and installation of the first interlayer 4. The second inner plate 8 can be inserted into the slot 103 on the second interlayer 7 through the limiting rods 14 to realize the positioning and installation of the second interlayer 7.

[0048] Weight reduction grooves 15 are respectively provided on the first inner plate 3 and the second inner plate 8 to reduce the weight of the chassis.

[0049] The first outer plate 5 and the second outer plate 6 are each provided with a plurality of grooves 13. The first interlayer 4 is disposed in the groove 13 of the first outer plate 5, and the second interlayer 7 is disposed in the groove 13 of the second outer plate 6. The outer plate is connected to the inner plate, and the metal-rubber interlayer is sandwiched in the groove 13.

[0050] A handle 10 is provided on the front panel 9.

Claims

1. A vibration-damping enclosure with a multi-layer composite gradient sandwich structure, characterized in that: The assembly includes an upper cover plate (1), a rear panel (2), a first outer panel (5), a second outer panel (6), a front panel (9), a bottom plate (11), and a mezzanine assembly. The upper cover plate (1) is connected to the top of the rear panel (2), the first outer panel (5), the second outer panel (6), the front panel (9), and the mezzanine assembly. The bottom plate (11) is connected to the bottom of the rear panel (2), the first outer panel (5), the second outer panel (6), the front panel (9), and the mezzanine assembly. The first outer panel (5) and the second outer panel (6) are disposed between the rear panel (2) and the front panel (9). The mezzanine assembly is disposed on the first outer panel (5) and the second outer panel (6). The sandwich assembly includes a first inner plate (3), a first sandwich layer (4), a second sandwich layer (7), and a second inner plate (8). The first inner plate (3) is connected to the first outer plate (5). The first sandwich layer (4) is disposed between the first inner plate (3) and the first outer plate (5). The second inner plate (8) is connected to the second outer plate (6). The second sandwich layer (7) is disposed between the second inner plate (8) and the second outer plate (6). The first interlayer (4) and the second interlayer (7) are made of metal wire material. The diameter of the wire material decreases from the inside to the outside, and the diameter range is 0.15mm-0.3mm. The metal wires of different diameters are set in a specific ratio of 0.15mm: 0.3mm = 3:1 by volume. The density of the first interlayer (4) and the second interlayer (7) is 4-2 g / cm³ from the inside to the outside. 3 The range gradually decreases.

2. The vibration damping enclosure with a multi-layer composite gradient sandwich structure as described in claim 1, characterized in that: The first inner plate (3) and the second inner plate (8) are made of copper.

3. The vibration damping enclosure with a multi-layer composite gradient sandwich structure as described in claim 1, characterized in that: The first interlayer (4) and the second interlayer (7) both include a snap-fit ​​part (101) and a protrusion part (102). The two sides of the protrusion part (102) are connected to the snap-fit ​​part (101) respectively, and a slot (103) is provided on one side of the protrusion part (102).

4. The vibration damping enclosure with a multi-layer composite gradient sandwich structure as described in claim 3, characterized in that: The protrusion (102) has an arc-shaped cross-section, and the snap-fit ​​part (101) has a rectangular cross-section.

5. The vibration damping enclosure with a multi-layer composite gradient sandwich structure as described in claim 1, characterized in that: A plurality of limiting rods (14) are provided on the first inner plate (3) and the second inner plate (8), and weight reduction grooves (15) are provided on the first inner plate (3) and the second inner plate (8) respectively.

6. The vibration damping enclosure with a multi-layer composite gradient sandwich structure as described in claim 1, characterized in that: The first outer plate (5) and the second outer plate (6) are respectively provided with a number of grooves (13).

7. The vibration damping enclosure with a multi-layer composite gradient sandwich structure as described in claim 1, characterized in that: A handle (10) is provided on the front panel (9).

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