A multi-degree-of-freedom phononic crystal vibration isolator

Abstract

The application discloses a multi-degree-of-freedom phononic crystal vibration isolator and belongs to the technical field of vibration control. The phononic crystal vibration isolator comprises a vertical vibration isolation phononic crystal assembly formed by a plurality of flat plates and support plates. The assembly is provided with two oblique mounting supports arranged above and below. The mounting supports are wedge-shaped hollow mass blocks. The upper end of the mounting support is provided with a unidirectional roller, which is a movable mechanism. The roller is connected with a guide rail on a load. There are four vibration isolation assemblies in total. The application can realize wide-frequency and multi-degree-of-freedom vibration isolation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vibration control, more particularly, to a multi-degree-of-freedom phononic crystal vibration isolator. BACKGROUND

[0002] The new generation of military aerospace electronic equipment has strict requirements on load volume and space, and with the increase of platform working time and maneuverability, the mechanical environment adaptability requirements of electronic equipment are increasingly harsh.

[0003] The most common method for electronic equipment vibration isolation and buffering at present is to install a vibration isolator. The traditional vibration isolator has the following defects: (1) the volume and weight of the vibration isolator are positively correlated with the volume and weight of the load, which will greatly increase the overall volume and weight of the equipment; (2) the vibration isolator will produce cm-level displacement in three directions during vibration isolation and buffering, which greatly increases the requirement for installation space; (3) the large displacement of the vibration isolator will affect the electromagnetic function of special equipment such as antennas. Many electronic equipment cannot use vibration isolators for vibration isolation due to the limitation of design input conditions, and can only be rigidly installed through reinforced structural members, which conflicts with the requirements of miniaturization and light weight of aerospace electronic equipment.

[0004] The vibration isolation method based on phononic crystals can achieve wide-frequency vibration isolation with very small displacement, volume and weight, but the phononic crystal only has vibration isolation effect in one direction. Therefore, innovative breakthrough in three-direction vibration isolation of phononic crystals has important theoretical significance and engineering application value for the light weight, miniaturization and significant reduction of installation space of electronic equipment. SUMMARY

[0005] The purpose of the present application is to overcome the shortcomings of the prior art and provide a multi-degree-of-freedom phononic crystal vibration isolator, which provides a high-performance passive vibration isolation device that can overcome the shortcomings of large volume, large mass and large deformation of the previous vibration isolator, has excellent vibration isolation performance and relatively small volume occupation, and can achieve wide-frequency, multi-degree-of-freedom vibration isolation, etc.

[0006] The purpose of the present application is achieved by the following scheme:

[0007] A multi-degree-of-freedom phononic crystal vibration isolator comprises:

[0008] A vibration isolation assembly and a mounting bracket are connected to the vibration isolation assembly; the vibration isolation assembly is a plate-shaped structure, which is divided into a flat plate and a support plate, the support plate is obliquely bent and cross-connected to the flat plate; the mounting bracket is obliquely fixedly connected to the vibration isolation assembly; two mounting brackets are arranged above and below the vibration isolation assembly to form a support assembly; a roller is arranged at the top of the support assembly, and the support assembly is connected to the top load guide rail through the roller.

[0009] Further, the vibration isolation assembly is provided with two obliquely arranged mounting brackets.

[0010] Further, the core vibration isolation structure of the vibration isolation assembly is a vertical vibration isolation phononic crystal isolator.

[0011] Further, the vibration isolation assembly is connected to the mounting bracket in an oblique manner.

[0012] Further, the roller is a one-way transmission mechanism.

[0013] Further, the mounting bracket is a wedge-shaped hollow mass.

[0014] Further, the vibration isolation assembly is four in total.

[0015] Further, the upper end of the mounting bracket is a mounting bracket top, and a one-way roller is mounted, which is a movable mechanism; the one-way roller is connected to the guide rail on the load.

[0016] Further, based on the multi-degree-of-freedom phononic crystal isolator according to any one of the above, further comprising the following steps:

[0017] S1, preparing a vibration isolation assembly: through 3D printing, using AlSi 10 Mg aluminum alloy to print the vibration isolation assembly as a whole;

[0018] S2, preparing a mounting bracket: manufacturing a structural steel bracket through wire cutting technology;

[0019] S3, overall assembly.

[0020] Further, in step S3, the following sub-steps are included:

[0021] S31, connecting the vibration isolation assembly and the mounting bracket to each other through bolts;

[0022] S32, installing a one-way roller on the top of the support assembly and fixing the bottom to the ground through bolts;

[0023] S33, embedding the roller into the top guide rail and fixing it with bolts.

[0024] The beneficial effects of the present application include:

[0025] (1) The present application utilizes the filtering characteristics of the cross support structure to change the transmission mode of elastic waves, and simultaneously utilizes the oblique installation of the one-way phononic crystal vibration isolation assembly to achieve multi-degree-of-freedom vibration control.

[0026] (2) The vibration isolation unit of the present application fully utilizes the structural characteristics of the cross support and sets multiple flexible bending plates, so that the device can achieve high-performance vibration isolation effect in a wide frequency range of 20-1000Hz.

[0027] (3) The thickness of the vibration isolation unit is within 30mm, and the vibration isolation unit has the characteristics of simple and reliable structure, small volume and light mass, and can be applied in many related fields.

[0028] (4) The multi-degree-of-freedom vibration isolation method provided by the application is simple and efficient, and can extend the one-way vibration isolation performance of the vibration isolation unit to multiple directions. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0030] Figure 1 The device structure of the embodiment of the application is shown in the figure;

[0031] Figure 2 The support unit of the embodiment of the application is shown in the figure;

[0032] Figure 3 The cross-sectional view of the phononic crystal vibration isolation assembly of the embodiment of the application is shown in the figure;

[0033] Figure 4 The schematic diagram of the embodiment of the application is shown in the figure;

[0034] Figure 5 The schematic diagram of the vibration isolation effect is shown in the figure. DETAILED DESCRIPTION

[0035] All features disclosed in the embodiments of the present application, or all steps in the methods or processes disclosed in the embodiments of the present application, can be combined and / or extended, replaced, unless mutually exclusive features and / or steps are explicitly disclosed.

[0036] In the description of the embodiments of the application, it should be noted that the orientation relationship indicated by the terms "upper", "lower" and the like is based on the orientation relationship shown in the drawings, or the orientation relationship when the product of the application is usually placed, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element indicated must have a specific orientation structure and operation, so it cannot be understood as a limitation on the application.

[0037] As shown in Figure 1 and Figure 4 The multi-degree-of-freedom vibration isolation device and the installation method thereof provided by the application mainly include four support assemblies, the upper part of each support assembly is provided with a one-way roller, and the four support assemblies are connected with the guide rail of the top load through a pulley to eliminate the coupling relationship of the vibration in two horizontal directions.

[0038] As shown in the Figure 2 support assembly provided by the application comprises two mounting brackets and a vibration isolation assembly, the mounting brackets are arranged on the vibration isolation assembly in an up-down manner, and the mounting brackets and the vibration isolation assembly are fixedly connected through bolts.

[0039] As shown in the Figure 3 vibration isolation assembly provided by the application is in a plate structure as a whole, and is divided into a flat plate and a support plate, the support plate is bent obliquely and is cross-connected to the flat plate. The bending of the support plate reduces the structural stiffness, and the cross-connection changes the transmission mode of the elastic wave, so that the vibration isolation purpose is achieved.

[0040] As shown in the Figure 5 The vibration isolation efficiency is greater than 80%, and the vibration isolation effect is good in each frequency band of 20-1000 Hz, which indicates that the vibration of the load is effectively attenuated under the action of the vibration isolation assembly.

[0041] Those skilled in the art can easily understand that the above description is only a preferred embodiment of the application, and is not intended to limit the application, and any modification, equivalent replacement and improvement made within the spirit and principle of the application shall be included in the protection scope of the application.

[0042] It should be noted that the following embodiments can be combined and / or extended, replaced in any way that is consistent with logic within the protection scope defined in the claims of the application, for example, the disclosed technical principles, disclosed technical features or implicitly disclosed technical features.

[0043] Example 1

[0044] A multi-degree-of-freedom phononic crystal vibration isolator comprises:

[0045] The vibration isolation assembly and the mounting bracket are connected to the vibration isolation assembly; the vibration isolation assembly is in a plate structure, and is divided into a flat plate and a support plate, the support plate is bent obliquely and is cross-connected to the flat plate; the mounting bracket and the vibration isolation assembly are fixedly connected obliquely; the vibration isolation assembly is provided with two mounting brackets in an up-down manner, forming a support assembly; the support assembly is provided with a roller at the top, and the support assembly is connected to the guide rail of the top load through the roller.

[0046] Example 2

[0047] On the basis of example 1, the vibration isolation assembly is provided with two obliquely arranged mounting brackets.

[0048] Example 3

[0049] On the basis of example 1, the core vibration isolation structure of the vibration isolation assembly is a vertical vibration isolation phononic crystal vibration isolator.

[0050] Embodiment 4

[0051] On the basis of embodiment 1, the vibration isolation assembly is connected with the mounting bracket obliquely.

[0052] Embodiment 5

[0053] On the basis of embodiment 1, the rolling wheel is a one-way transmission mechanism.

[0054] Embodiment 6

[0055] On the basis of embodiment 1, the mounting bracket is a wedge-shaped hollow mass.

[0056] Embodiment 7

[0057] On the basis of embodiment 1, the vibration isolation assembly is four in total.

[0058] Embodiment 8

[0059] On the basis of embodiment 1, the upper end of the mounting bracket is a mounting bracket top, and a one-way rolling wheel is mounted, which is a movable mechanism; the one-way rolling wheel is connected with a guide rail on the load.

[0060] Embodiment 9

[0061] Based on the multi-degree-of-freedom phononic crystal vibration isolator according to any one of embodiments 1-8, further comprising the following steps:

[0062] S1, preparing a vibration isolation assembly: through 3D printing, using AlSi 10 Mg aluminum alloy to print the vibration isolation assembly;

[0063] S2, preparing a mounting bracket: through wire cutting technology, a structural steel bracket is manufactured;

[0064] S3, overall assembly.

[0065] Embodiment 10

[0066] On the basis of embodiment 9, in step S3, the following sub-steps are included:

[0067] S31, the vibration isolation assembly and the mounting bracket are connected with each other through bolts;

[0068] S32, a one-way rolling wheel is installed at the top of the support assembly, and the bottom is fixed to the ground through bolts;

[0069] S33, the rolling wheel is embedded in the top guide rail and fixed by bolts.

[0070] The above technical solution is only one embodiment of the present application. Based on the disclosed application method and principle, those skilled in the art can easily make various types of improvements or modifications without being limited to the method described in the above embodiment. Therefore, the above-described method is only preferred and not limited.

[0071] In addition to the above examples, those skilled in the art can obtain other embodiments by being inspired or making modifications based on the above disclosure or using knowledge or technology in the related field. The features of each embodiment can be interchanged or replaced. The modifications and changes made by those skilled in the art do not deviate from the spirit and scope of the present application, and should be within the protection scope of the appended claims of the present application.

Claims

1. A multi-degree-of-freedom phononic crystal isolator, characterized in that, include: Vibration isolation component and mounting bracket, wherein the mounting bracket is connected to the vibration isolation component; The vibration isolation component has a plate-like structure, consisting of a flat plate and a support plate. The support plate is bent at an angle and cross-connected to the flat plate. The mounting bracket is fixedly connected to the vibration isolation component at an angle. The vibration isolation component is equipped with two mounting brackets at the top and bottom to form a support component. The top of the support component is provided with rollers, and the support component is connected to the guide rail of the top load through the rollers. The vibration isolation assembly is equipped with two inclined mounting brackets, one above and one below. The core vibration isolation structure of the vibration isolation assembly is a phononic crystal isolator with vertical vibration isolation. The vibration isolation component is obliquely connected to the mounting bracket; The roller is a one-way transmission mechanism; The mounting bracket is a wedge-shaped hollow mass block; There are a total of four vibration isolation components; The upper end of the mounting bracket is mounted on the top of the mounting bracket and is equipped with a one-way roller, which is a movable mechanism; the one-way roller is connected to the guide rail on the load; Through 3D printing, utilizing AlSi 10 Mg aluminum alloy integrally printed vibration isolation components; Structural steel supports are manufactured using wire cutting technology; The vibration isolation components are connected to the mounting brackets using bolts; The support assembly is fitted with one-way rollers at the top and fixed to the ground at the bottom with bolts. Embed the rollers into the top guide rail and secure them with bolts.

Images