Three-way vibration isolator

Abstract

The three-way vibration isolator comprises an upper foot margin piece, a lower foot margin piece and spokes, and the upper foot margin piece serves as an upper supporting structure of the three-way vibration isolator and is used for being connected with a machine case; the lower foot margin piece serves as a lower supporting structure of the three-way vibration isolator and is used for supporting a fan; the spokes are connected with the upper foot margin piece and the lower foot margin piece to form a main body structure of the three-way vibration isolator; the upper foot margin piece and the lower foot margin piece are parallel, an upper foot margin piece hole is formed in the piece face of the upper foot margin piece and connected with a machine box through a bolt, a lower foot margin piece hole is formed in the piece face of the lower foot margin piece and connected with a fan through a bolt, and the upper foot margin piece and the lower foot margin piece are connected through a bolt. The upper foot margin piece, the lower foot margin piece and the spokes are each of a hollow structure, each hollow structure comprises an opening, the spokes are elastic, the upper foot margin piece and the lower foot margin piece are each of a structure with a certain thickness and rigidity, and the device solves the current problems of high cost and poor vibration isolation performance.

Description

Technical Field

[0001] The invention belongs to the technical field of vibration isolators, and in particular relates to a three-way vibration isolator. Background Art

[0002] In modern industrial equipment, chassis and fans are core components, and their stable operation is crucial. However, during the operation of the fan, vibrations will be generated due to factors such as the inertia of the rotating parts and the eccentricity of the mass configuration. These vibrations will not only affect the stability and service life of the fan, but will also be transmitted to the chassis through the connection structure, further causing vibration and noise in the chassis, causing adverse effects on the surrounding environment.

[0003] In order to effectively reduce or isolate this vibration transmission, the traditional approach is to install vibration reduction elements between the fan and the chassis, such as rubber pads, springs, etc. However, these traditional vibration reduction elements have many shortcomings, such as limited vibration reduction effect, easy aging, short service life, etc.

[0004] The fan is fixed on the chassis and discharges the heat emitted by the equipment out of the chassis. The vibration source is transmitted to the fan through the chassis. The fan itself has a natural frequency and will resonate with the vibration transmitted by the chassis. Large vibrations can easily cause damage to the fan.

[0005] In this context, three-way vibration isolators came into being. Three-way vibration isolators are devices specially designed to reduce or isolate vibration transmission. They can provide effective vibration isolation in three directions (usually vertical and two horizontal directions). However, most of the existing three-way vibration isolators have problems such as complex structure, heavy weight, high cost, etc., and in some specific application scenarios, their vibration isolation performance and stability still need to be improved.

[0006] In order to solve these problems, the present invention proposes a new type of three-way vibration isolator, which achieves the combination of light weight, high strength and excellent vibration isolation performance. At the same time, the vibration isolator also has the advantages of simple structure, convenient installation and low cost, and is suitable for various equipment installation scenarios that need to reduce vibration transmission. Summary of the invention

[0007] The purpose of the present invention is to provide a three-way vibration isolator to solve the problems raised in the above background technology.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a three-way vibration isolator, comprising an upper anchor plate, a lower anchor plate and spokes,

[0009] An upper anchor plate, serving as an upper supporting structure of the three-way vibration isolator and used for connecting with the chassis;

[0010] A lower anchor plate, serving as a lower supporting structure of the three-way vibration isolator, and used to support the fan 1;

[0011] The spokes connect the upper anchor plate and the lower anchor plate to form the main structure of the three-way vibration isolator;

[0012] The upper anchor plate is parallel to the lower anchor plate, an upper anchor plate hole is opened on the surface of the upper anchor plate, and the upper anchor plate hole is connected to the chassis through bolts, and a lower anchor plate hole is opened on the surface of the lower anchor plate, and the lower anchor plate hole is connected to the fan through bolts;

[0013] The upper ground anchor plate, the lower ground anchor plate and the spokes have a hollow structure, the hollow structure includes an opening, the spokes are elastic, and the upper ground anchor plate and the lower ground anchor plate are both structures with a certain thickness and rigidity.

[0014] The present invention further states that the thickness of the three-way vibration isolator when unfolded in a plane is 1.5 mm-2.0 mm.

[0015] The present invention further states that the thickness of the three-way vibration isolator when unfolded in a plane is 1.5 mm or 2.0 mm, and the upper anchor hole and the lower anchor hole are not on the same axis.

[0016] The present invention further states that the thickness of the three-way vibration isolator when unfolded in a plane is 1.8 mm, and the upper anchor hole and the lower anchor hole are located on the same axis.

[0017] The present invention further illustrates that it also includes a gasket, the gasket is located below the three-way vibration isolator, and the gasket hole of the gasket is coaxially matched with the hole of the lower anchor plate;

[0018] The gasket and the three-way vibration isolator are connected to the fan main frame through bolts, and the gasket is arranged between the fan main frame and the three-way vibration isolator.

[0019] The present invention further describes that it also includes a cover plate, which is used to prevent debris from falling into the inside of the fan. The cover plate is provided with a plurality of air holes, and the plurality of air holes facilitate the exhaust of the chassis. The cover plate includes a cover plate gasket, and the cover plate is arranged above the four upper ground plates, and the cover plate gasket is coaxially matched with the upper ground plate hole.

[0020] The present invention further describes that the three-way vibration isolator, the gasket and the cover plate are all made of DMnCu20Ni5Fe2 material.

[0021] The present invention further illustrates that the fan includes a fan main frame, and through holes are opened at the four corners of the fan main frame. The four lower anchor holes of the three-way vibration isolators are connected to the fan main frame by bolts, and the bolts are locked by nuts to achieve a stable connection between the fan and the three-way vibration isolator. The four upper anchor holes of the three-way vibration isolators are threadedly connected to the corresponding threaded holes on the chassis by bolts.

[0022] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0023] Through the main structure composed of upper anchor plate, lower anchor plate and spokes, the three-way vibration isolator can effectively isolate vibration in three directions, which can effectively reduce vibration noise and improve the stability and service life of the equipment;

[0024] The design of the upper and lower anchor holes allows the vibration isolator to be flexibly connected to the fan and chassis. In particular, when the lower and upper anchor holes are not on the same axis, the installation angle can be further adjusted to meet the installation requirements of different equipment. When they are on the same axis, the installation process is simplified and the installation efficiency is improved.

[0025] The hollow structure adopted by the upper anchor plate, the lower anchor plate and the spokes not only reduces the overall weight, but also maintains sufficient strength and rigidity, so that the vibration isolator is not easily deformed or damaged when bearing load. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0027] In the attached picture:

[0028] Figure 1 1.5 mm and 2 mm thick three-way vibration isolators according to an embodiment of the present invention are assembled schematically;

[0029] Figure 2 1.5 mm and 2 mm thickness three-way vibration isolators are connected in accordance with an embodiment of the present invention;

[0030] Figure 3 1.5 mm and 2 mm thickness vibration measurement points schematic diagram of an embodiment of the present invention;

[0031] Figure 4 1.8 mm thickness vibration measurement point schematic diagram of an embodiment of the present invention;

[0032] Figure 5 1.5 mm and 2 mm thick three-way vibration isolators according to an embodiment of the present invention;

[0033] Figure 6 1.5 mm and 2 mm thick three-way vibration isolators according to an embodiment of the present invention;

[0034] Figure 7 It is a random functional vibration test spectrum of the three-way vibration isolators with thickness of 1.5 mm and 2 mm according to the embodiment of the present invention;

[0035] Figure 8 1.8 mm thick three-way vibration isolator structure schematic diagram of an embodiment of the present invention;

[0036] Fig. 9 is an input spectrum of random vibration of a 1.8 mm three-way vibration isolator according to an embodiment of the present invention;

[0037] Fig.10 1.8 mm thick three-way vibration isolator assembly schematic diagram of an embodiment of the present invention;

[0038] In the figure: 1. fan; 101. fan main frame; 2. three-way vibration isolator; 201. upper anchor plate; 202. lower anchor plate; 203. spoke; 204. upper anchor plate hole; 205. lower anchor plate hole; 3. gasket; 4. cover plate gasket; 5. cover plate. DETAILED DESCRIPTION

[0039] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The embodiment of the present invention provides a technical solution: a three-way vibration isolator, characterized in that: the three-way vibration isolator 2 includes an upper anchor plate 201, a lower anchor plate 202 and spokes 203,

[0041] The upper anchor plate 201 is used as the upper supporting structure of the three-way vibration isolator 2 and is connected to the chassis;

[0042] A lower anchor plate 202, serving as a lower supporting structure of the three-way vibration isolator 2, for supporting the fan 1;

[0043] The spokes 203 connect the upper anchor plate 201 and the lower anchor plate 202 to form the main structure of the three-way vibration isolator 2;

[0044] The upper anchor plate 201 is parallel to the lower anchor plate 202. An upper anchor plate hole 204 is formed on the surface of the upper anchor plate 201. The upper anchor plate hole 204 is connected to the chassis through bolts. A lower anchor plate hole 205 is formed on the surface of the lower anchor plate 202. The lower anchor plate hole 205 is connected to the fan 1 through bolts.

[0045] The upper ground anchor 201, the lower ground anchor 202 and the spokes 203 have a hollow structure, the hollow structure includes an opening, the spokes 203 are elastic, and the upper ground anchor 201 and the lower ground anchor 202 are both structures with a certain thickness and rigidity.

[0046] It should be noted that: when the thickness of the three-way vibration isolator 2 when unfolded in a plane is 1.5mm or 2.0mm, it also includes a cover plate 5, which is used to prevent debris from falling into the fan 1. The cover plate 5 is provided with a plurality of air holes, through which the hot air in the chassis can be smoothly discharged from the chassis. The cover plate 5 includes a cover plate gasket 4, and the cover plate 5 is arranged above the four upper anchor plates 201. The cover plate gasket 4 is coaxially matched with the upper anchor plate hole 204, and the upper anchor plate holes 204 of the four three-way vibration isolators 2 and the cover plate gasket 4 on the cover plate 5 are coaxially matched and connected to the chassis through the bolts.

[0047] It should be noted that: according to the three-way vibration isolator according to claim 1, it is characterized in that: the thickness of the three-way vibration isolator 2 when unfolded in a plane is 1.5mm-2.0mm.

[0048] It should be noted that the thickness of the three-way vibration isolator 2 when unfolded in a plane is 1.5 mm or 2.0 mm, and the upper anchor hole 204 and the lower anchor hole 205 are not on the same axis.

[0049] It should be noted that the thickness of the three-way vibration isolator 2 when unfolded in a plane is 1.8 mm, and the upper anchor hole 204 and the lower anchor hole 205 are located on the same axis.

[0050] It should be noted that: a gasket 3 is also included, and the gasket 3 is located below the three-way vibration isolator 2, and the gasket hole of the gasket 3 is coaxially matched with the lower anchor hole 205;

[0051] The gasket 3 and the three-way vibration isolator 2 are connected to the fan main frame 101 by bolts, and the gasket 3 is arranged between the fan main frame 101 and the three-way vibration isolator 2 .

[0052] It should be noted that the three-way vibration isolator 2 , the gasket 3 and the cover plate 5 are all made of DMnCu20Ni5Fe2 material.

[0053] It should be noted that: the fan 1 includes a fan main frame 101, and through holes are opened at the four corners of the fan main frame 101. The lower anchor holes 205 of the four three-way vibration isolators 2 are connected to the fan main frame 101 by bolts, and the bolts are tightened by nuts to achieve a stable connection between the fan 1 and the three-way vibration isolator 2. The upper anchor holes 204 of the four three-way vibration isolators 2 are threadedly connected to the corresponding threaded holes on the chassis by bolts.

[0054] It should be noted that: when the interface of fan 1 and the chassis installation interface are not on the same axis, a thickness of 1.5mm or 2.0mm is selected. Specifically, the 1.5mm thickness has a lower vibration isolation frequency and a better vibration isolation effect, and the 2.0mm thickness has a higher strength. When the interface of fan 1 and the chassis installation interface are on the same axis, a thickness of 1.8mm is selected.

[0055] It should be noted that: the fan main frame 101 is made of ABS material, and the three-way vibration isolator 2 adopts a vibration isolation design in both the vertical and radial directions to reduce the first three natural frequencies of the system.

[0056] The performance parameters of the main frame of the fan 1 are shown in the table:

[0057]

[0058] The three-way vibration isolator 2 and the gasket 3 are made of DMnCu20Ni5Fe2 vibration suppression alloy, and its material parameter properties are shown in the table.

[0059]

[0060] The specific physical properties are as follows: tensile strength: 540MPa, Young's modulus: 80GPa, Poisson's ratio: 0.338, yield strength (0.2%): 230MPa, fatigue limit (bending): 160MPa, hardness (HV): 100~130, linear expansion coefficient: 22.04×10^-6 / deg, specific heat capacity: 512.7J / Kg·K, thermal conductivity: 10W / m·K, magnetism: paramagnetism / antiferromagnetism, density: 7.25g / cm^3.

[0061] In Example 1, when the thickness of the three-way vibration isolator 2 when unfolded in a plane is 1.5 mm, the aluminum alloy cover plate solution is compared with the 1.5 mm three-way vibration isolator solution;

[0062] The specific calculation process and results are as follows:

[0063] Step 1. Load condition: The weight of the fan itself is restored by adding a mass point at the bottom. The total weight of the fan is about 251.4g, and the fan material used in the calculation is ABS plastic.

[0064] Step 2. Enter incentives

[0065] Vibration table input excitation-random vibration value (g 2 / HZ)

[0066]

[0067]

[0068] Figure 7 Shown is the random functional vibration test spectrum

[0069] Step 3. Select the measuring point location

[0070] The random vibration boundary condition of the fan 1 is to impose fixed constraints on the four bolt holes on the outer side of the cover plate, and apply a functional vibration spectrum at the fixed constraints. The input spectrum is as follows: Figure 7 As shown. A total of 5 points were selected as vibration test comparison points, such as Figure 8 As shown;

[0071] Step 4. Random Vibration Analysis Results

[0072] For the vibration reduction scheme of the fan 1, the three axial acceleration spectral densities are applied to perform random vibration analysis, and the stress results and vibration reduction effects of the three-way vibration isolator 2 are calculated, where the stress results are the stress of random vibration, and the proportional factor is 3Sigma. The vertical strength is 87.1MPa, the radial strength 1 is 93.0MPa, and the radial strength 2 is 98.4MPa.

[0073] Random vibration peak comparison results

[0074]

[0075]

[0076] Random vibration effective value comparison results

[0077]

[0078] Step 5. Experimental conclusion: The results of random vibration analysis show that the peak values ​​of the aluminum alloy cover and the 1.5mm thick three-way vibration isolator are amplified compared with the input peak values, but the amplification of the 1.5mm thick three-way vibration isolator is smaller and below the base frequency of 13000r / min. From the results of the effective value, the effective values ​​of the aluminum alloy cover are amplified, and compared with the effective value of the input, the effect of the 5mm thick three-way vibration isolator in three directions is about 50%.

[0079] The comparison between the above two schemes and the input effective value results shows that the 1.5mm thick three-way vibration isolator scheme has a significant vibration reduction effect while meeting the strength requirements.

[0080] Example 2: When the thickness of the three-way vibration isolator 2 when unfolded in a plane is 2.0 mm, the aluminum alloy cover plate solution is compared with the 2.0 mm three-way vibration isolator solution;

[0081] Based on steps 1-3 of Example 1, the difference is:

[0082] Step 4. For the vibration reduction scheme of the fan 1, the three axial acceleration spectral densities are applied to perform random vibration analysis, and the stress result and vibration reduction effect of the three-way vibration isolator 2 are calculated, where the stress result is the stress of random vibration, the proportional factor is 3Sigma, the vertical strength is 63.0MPa, the radial strength 1 is 77.5MPa, and the radial strength 2 is 77.8MPa.

[0083] Random vibration peak comparison results

[0084]

[0085]

[0086] Random vibration effective value comparison results

[0087]

[0088] Step 5. Experimental conclusion: The results of random vibration analysis show that compared with the peak value of the input, the peak values ​​of the aluminum alloy cover plate scheme and the three-way vibration isolator scheme are amplified, but the amplification of the three-way vibration isolator scheme is smaller and below the base frequency of 13000r / min. From the results of the effective values, the effective values ​​of the aluminum alloy cover plates are amplified, and compared with the effective values ​​of the input, the three-way vibration isolator scheme has the best vertical effect in three directions, and the radial effect is also relatively ideal. According to the comparison of the effective value results of the two schemes of Example 1 and Example 2 with the input, it is shown that the three-way vibration isolator scheme has a significant vibration reduction effect while meeting the strength conditions.

[0089] Embodiment 3: The thickness of the three-way vibration isolator 2 when unfolded in a plane is 1.8 mm;

[0090] Step 1. Random vibration input

[0091] Functional vibration test conditions

[0092]

[0093] Durability vibration test conditions

[0094]

[0095]

[0096] Step 2. Calculation process

[0097] The weight of the fan itself is restored by adding a mass point at the bottom. The total weight of the fan is about 480g, and the main body material of the fan is aluminum alloy during calculation.

[0098] Step 3. Simulation calculation

[0099] The input spectrum of random vibration is the spectrum value obtained by fitting the vibration response curve near the fan installation point, refer to Fig. 9 .

[0100] Step 4. Measurement point selection

[0101] The measurement points are selected at 4 corner points of the fan body, such as Figure 4 shown.

[0102] Step 5. Strength analysis results

[0103] Table 3.1 Impact strength

[0104]

[0105] Impact stress results:

[0106] Under the condition of 20g impact, the maximum stress of the vibration suppression structure is 55.1Mp<235Mp. Therefore, the design of the vibration suppression structure meets the strength requirements.

[0107] Step 6. Random Vibration Analysis Results

[0108] The X-axis fatigue life is 16414s, i.e. 4.56h>3h

[0109] The fatigue life of the Y axis is 12833s, that is, 3.56h>3h

[0110] The fatigue life of the Z axis is 19623s, that is, 5.45h>3h

[0111] From the stress and life results of random vibration, we can know that the maximum stress in three directions is 135.9MPa < 160MPa, and the fatigue life in three directions is at least 3.56h > 3h. Therefore, the design of the three-way vibration isolator meets the strength requirements.

[0112] Random Vibration Results

[0113]

[0114] From the simulation calculation results: in the frequency band of 200Hz-500Hz, the peak value of the vibration suppression scheme is reduced to varying degrees in three directions compared with the original scheme, among which the vertical peak value (X direction) is reduced by about 85%, the radial peak value 1 (Y direction) is reduced by about 50%, and the radial peak value 2 (Z direction) is reduced by about 65%.

[0115] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, 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 on the present invention.

[0116] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A three-way vibration isolator, characterized in that The three-way vibration isolator (2) comprises an upper anchor plate (201), a lower anchor plate (202) and spokes (203). An upper anchor plate (201), serving as an upper supporting structure of the three-way vibration isolator (2) and used for connection with a chassis; A lower anchor plate (202) serving as a lower support structure of the three-way vibration isolator (2) and used to support the fan (1); The spokes (203) connect the upper anchor plate (201) and the lower anchor plate (202) to form the main structure of the three-way vibration isolator (2); The upper anchor plate (201) and the lower anchor plate (202) are parallel to each other; an upper anchor plate hole (204) is provided on a surface of the upper anchor plate (201); the upper anchor plate hole (204) is connected to the chassis via bolts; a lower anchor plate hole (205) is provided on a surface of the lower anchor plate (202); the lower anchor plate hole (205) is connected to the fan (1) via bolts; The upper ground anchor plate (201), the lower ground anchor plate (202) and the spokes (203) have a hollow structure, the hollow structure comprises an opening, the spokes (203) are elastic, and the upper ground anchor plate (201) and the lower ground anchor plate (202) are both structures with a certain thickness and rigidity.

2. A three-way vibration isolator according to claim 1, characterized in that: The thickness of the three-way vibration isolator (2) when unfolded in a plane is 1.5 mm to 2.0 mm.

3. A three-way vibration isolator according to claim 2, characterized in that: The thickness of the three-way vibration isolator (2) when unfolded in a plane is 1.5 mm or 2.0 mm, and the upper anchor plate hole (204) and the lower anchor plate hole (205) are not on the same axis.

4. A three-way vibration isolator according to claim 2, characterized in that: The thickness of the three-way vibration isolator (2) when unfolded in a plane is 1.8 mm, and the upper anchor plate hole (204) and the lower anchor plate hole (205) are located on the same axis.

5. A three-way vibration isolator according to claim 3, characterized in that: It also includes a gasket (3), the gasket (3) is located below the three-way vibration isolator (2), and the gasket hole of the gasket (3) is coaxially matched with the lower anchor hole (205); The gasket (3) and the three-way vibration isolator (2) are connected to the fan main frame (101) by means of bolts, and the gasket (3) is arranged between the fan main frame (101) and the three-way vibration isolator (2).

6. A three-way vibration isolator according to claim 3, characterized in that: The fan (1) further comprises a cover plate (5), the cover plate (5) being used to prevent debris from falling into the interior of the fan (1), the cover plate (5) being provided with a plurality of air holes, the plurality of air holes being convenient for exhausting the chassis, the cover plate (5) comprising a cover plate gasket (4), the cover plate (5) being arranged above the four upper anchor plates (201), the cover plate gasket (4) being coaxially matched with the upper anchor plate holes (204).

7. A three-way vibration isolator according to claim 6, characterized in that: The three-way vibration isolator (2), the gasket (3) and the cover plate (5) are all made of DMnCu20Ni5Fe2 material.

8. A fan assembly, characterized in that: It comprises four three-way vibration isolators, a fan and a chassis as claimed in any one of claims 1 to 6; The fan (1) comprises a fan main frame (101), and through holes are opened at four corners of the fan main frame (101). The lower anchor holes (205) of the four three-way vibration isolators (2) are connected to the fan main frame (101) by bolts. The bolts are locked by nuts to achieve a stable connection between the fan (1) and the three-way vibration isolators (2). The upper anchor holes (204) of the four three-way vibration isolators (2) are threadedly connected to corresponding threaded holes on the chassis by bolts.

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