Plate-shaped structure with vibration damping and limiting functions

Abstract

Disclosed in the present application is a plate-shaped structure with vibration damping and limiting functions. The plate-shaped structure comprises an upper plate, a lower plate, phononic crystal vibration-damping cell elements, diagonally tensioned friction-damping cell elements and C-type limiting cell elements, wherein the phononic crystal vibration-damping cell elements and the diagonally tensioned friction-damping cell elements are disposed between the upper plate and the lower plate and are periodically arranged at intervals; and the C-type limiting cell elements are distributed at four corners of the plate-shaped structure. The present application has an ingenious design, and arranging the phononic crystal vibration-damping cell elements and the diagonally tensioned friction-damping cell elements between the upper plate and the lower plate to form a periodically arranged array, and arranging the C-shaped limiting cell elements at the four corners of the plate-shaped structure greatly reduce the mounting space for an electronic device and a vibration control apparatus, and solve the current problems of vibration isolators for electronic devices, i.e., poor vibration-damping and impact-resistant effects and a large displacement during operation.

Description

A plate-like structure with vibration reduction and limiting functions

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202311829971.2, filed on December 27, 2023, entitled “A plate-like structure with vibration damping and limiting function,” which is incorporated herein by reference in its entirety. Technical Field

[0003] The present application relates to the field of vibration control technology, and in particular to a plate-like structure with vibration reduction and position limiting functions. Background Art

[0004] During operation, aerospace electronic equipment will face external broadband, multi-directional, high-level vibration loads and multi-directional, high-level impact loads. In order to reduce the impact of such mechanical excitations on electronic equipment, vibration isolators are used between the external installation position and the equipment installation base to achieve the protection effect of the target device.

[0005] Phononic crystals are a new type of vibration-damping structure. Through the periodic arrangement of unit cells, they shield or suppress vibrations and wave propagation within certain frequency bands, effectively isolating or attenuating vibrations within the bandgap frequency range. All-metal phononic crystals are suitable for the demanding operating environments of aerospace electronics. However, current all-metal phononic crystals face two challenges: First, they struggle to provide damping and dissipate vibration and impact energy; second, the limited installation space for aerospace electronics cannot meet the displacement requirements of vibration control devices during operation.

[0006] Summary of the Invention

[0007] To solve the above problems, the present application provides a plate-like structure with vibration reduction and position limiting functions. The specific technical solutions are as follows:

[0008] It includes an upper plate, a lower plate, a phononic crystal vibration damping cell, an oblique friction damping cell and a C-type limit cell;

[0009] The phononic crystal vibration reduction cells and the oblique friction damping cells are arranged between the upper plate and the lower plate and are arranged at periodic intervals; the C-shaped limiting cells are distributed at the four corners of the plate-like structure.

[0010] Furthermore, the oblique friction damping cells are arranged outside the array of phononic crystal vibration reduction cells, are spaced apart relative to the phononic crystal vibration reduction cells, and the oblique directions of adjacent oblique friction damping cells are different.

[0011] Furthermore, the phononic crystal vibration-damping cell, the oblique friction damping cell, and the C-type limiting cell are all mounted on the upper plate and the lower plate by screws.

[0012] Furthermore, the phononic crystal vibration reduction cell includes a main axis and a U-shaped member arranged around the main axis, and the U-shaped bodies of the U-shaped member are periodically arranged along the longitudinal direction.

[0013] Furthermore, the oblique-pull friction damping cell is composed of a damping support, a friction inner shaft and a friction sleeve; the damping support includes a planar support part connected to the upper plate and the lower plate, and also includes an inclined support part for connecting the friction inner shaft, and the friction sleeve is provided on the outside of the friction inner shaft.

[0014] Furthermore, the friction inner shaft and the friction sleeve are interference fit.

[0015] Furthermore, the C-shaped limiting cell includes a fixed support, a C-shaped buckle, a spring and a retaining ring;

[0016] The fixed support includes a support part connected to the upper plate and the lower plate, and also includes a fixing part, on which is provided a shaft column connected to the C-shaped clip, and a retaining ring is provided at the open end of the shaft column, and the upper and lower horizontal parts of the C-shaped clip are sleeved on the shaft column, and a spring is provided between the C-shaped clip and the fixed support.

[0017] Furthermore, the fixed support and the C-shaped buckle are clearance-fitted, and the spring sleeve is arranged on the shaft column and is arranged between the C-shaped buckle and the fixing part and the retaining ring.

[0018] Furthermore, a washer is provided on the shaft column, and the washer is provided between the retaining ring and the C-shaped buckle.

[0019] Furthermore, the fixing portion is an L-shaped structure, the side end of the support portion is connected to the short end of the L-shaped structure, and the support portion is parallel to the long end of the L-shaped structure.

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

[0021] Phononic crystal vibration reduction cells are arranged between the upper plate and the lower plate to form an array, and oblique friction damping cells are arranged in the array, which are periodically arranged with the phononic crystal vibration reduction cells between the upper plate and the lower plate. Compared with the existing technology, it can achieve high-efficiency vibration reduction and impact resistance at the same time. The oblique friction damping cells are arranged on the outside of the array, and the oblique directions of adjacent positions are different, so that it has multi-directional vibration reduction and impact resistance performance, which meets the multi-directional vibration reduction and impact resistance requirements of electronic equipment. At the same time, C-shaped limit cells are arranged at the four corners of the plate structure to limit the working displacement to within 1mm, which greatly reduces the installation space of the electronic equipment and the vibration control device, and solves the problems of poor vibration reduction and impact effect and large displacement during operation faced by the current electronic equipment vibration isolators. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is an overall schematic diagram of the plate-like structure of the present application.

[0023] FIG2 is a schematic diagram of the phononic crystal vibration reduction cell structure of the present application.

[0024] FIG3 is a schematic diagram of the oblique-pull friction damping cell structure of the present application.

[0025] FIG4 is a schematic diagram of the C-type limiting cell structure of the present application.

[0026] Explanation of the reference numerals: 1-phononic crystal vibration reduction cell, 2-oblique-tension friction damping cell, 3-C-type limit cell, 4-upper plate, 5-lower plate, 6-damping support, 7-friction inner shaft, 8-friction sleeve, 9-fixed support, 10-C-type buckle, 11-spring, 12-washer, 13-retaining ring. DETAILED DESCRIPTION

[0027] The following description clearly and completely describes the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] In the description of the embodiments of the present application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the invention product is conventionally placed when in use, or the orientation or positional relationship conventionally understood by those skilled in the art, or the orientation or positional relationship in which the invention product is conventionally placed when in use. This is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0029] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0030] Example 1

[0031] Example 1 of the present application discloses a plate-like structure with a vibration reduction and position limiting function, as shown in FIG1 , and is specifically as follows:

[0032] The plate-like structure includes an upper plate 4, a lower plate 5, a phononic crystal vibration reduction cell 1, an oblique friction damping cell 2 and a C-type limit cell 3;

[0033] The phononic crystal vibration reduction cells 1 and the oblique friction damping cells 2 are arranged between the upper plate 4 and the lower plate 5 and are arranged at periodic intervals; the C-shaped limiting cells 3 are distributed at the four corners of the plate structure.

[0034] Specifically, the phononic crystal vibration reduction cell 1 , the oblique friction damping cell 2 , and the C-type limit cell 3 are all mounted on the upper plate 4 and the lower plate 5 by screws.

[0035] As shown in FIG2 , in this embodiment, the phononic crystal vibration reduction cell 1 includes a main axis and a U-shaped member arranged around the main axis, and the U-shaped bodies of the U-shaped member are periodically arranged along the longitudinal direction;

[0036] The bending of the U-shaped part is used to reduce the resonance frequency of the device and increase the vibration propagation path. The circumferential distribution of the U-shaped part and its periodic distribution along the longitudinal direction give it a multi-directional vibration reduction effect while maintaining a small vertical size. Specifically, the main shaft can adopt a hollow structure to reduce the structural weight while reserving assembly space.

[0037] As shown in FIG3 , in this embodiment, the oblique friction damping cell 2 is composed of a damping support 6, a friction inner shaft 7, and a friction sleeve 8. The damping support 6 includes a planar support portion connected to the upper plate 4 and the lower plate 5, and also includes an inclined support portion for connecting to the friction inner shaft 7. The friction sleeve 8 is provided on the outside of the friction inner shaft 7.

[0038] The friction inner shaft 7 and the friction sleeve 8 are interference fit.

[0039] The vibration and impact of external excitation are converted into axial movement connecting the friction inner shaft 7 and the friction sleeve 8. In this embodiment, the oblique friction damping cell 2 is arranged on the outside of the array formed by the phononic crystal vibration reduction cell 1, and is spaced apart relative to the phononic crystal vibration reduction cell 1. The oblique pulling directions of the adjacent oblique friction damping cells 2 are different, that is, the axial movement is not parallel to any edge of the plate structure, which can achieve the effect of multi-directional friction damping.

[0040] As shown in FIG4 , the C-shaped limiting cell 3 includes a fixed support 9, a C-shaped buckle 10, a spring 11 and a retaining ring 13;

[0041] The fixed support 9 includes a support portion connected to the upper plate 4 and the lower plate 5, and a fixing portion, on which a shaft column connected to the C-shaped buckle 10 is provided. A retaining ring 13 is provided at the open end of the shaft column. The upper and lower horizontal portions of the C-shaped buckle 10 are sleeved on the shaft column. A spring 11 is provided between the C-shaped buckle 10 and the fixed support 9 as a buffer.

[0042] Specifically, the fixing support 9 and the C-shaped buckle 10 are clearance-fitted, and the spring 11 is sleeved on the shaft column and disposed between the C-shaped buckle 10 and the fixing portion and the retaining ring 13;

[0043] The shaft column is further provided with a washer 12, which is provided between the retaining ring 13 and the C-shaped buckle 10;

[0044] The fixing portion is an L-shaped structure, the side end of the support portion is connected to the short end of the L-shaped structure, and the support portion is parallel to the long end of the L-shaped structure.

[0045] The spring 11 is in a pre-compressed state, so that the working displacement of the C-shaped buckle 10 is within 1 mm, thereby limiting the working displacement of the plate to within 1 mm.

[0046] The present application is not limited to the aforementioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A plate-like structure with vibration damping and limiting functions, the plate-like structure comprising an upper plate, a lower plate, phononic crystal vibration damping cells, cable-stayed friction damping cells, and C-shaped limiting cells; The phononic crystal vibration damping cells and the cable-stayed friction damping cells are arranged between the upper plate and the lower plate at periodic intervals; the C-shaped limiting cells are distributed at the four corners of the plate-like structure.

2. The plate-like structure with vibration damping and limiting function according to claim 1, wherein, The cable-stayed friction damping cells are arranged outside the array formed by the phononic crystal vibration damping cells, are distributed at intervals relative to the phononic crystal vibration damping cells, and the cable-stayed directions of adjacent cable-stayed friction damping cells are different.

3. The plate-like structure with vibration damping and limiting functions according to claim 1, wherein, The phononic crystal vibration damping cells, the cable-stayed friction damping cells, and the C-shaped limiting cells are all installed on the upper plate and the lower plate by screws.

4. The plate-like structure with a vibration damping and limiting function according to claim 1, wherein, The phononic crystal vibration damping cell includes a main shaft and a U-shaped member arranged around the main shaft, and the U-shaped body of the U-shaped member is arranged in a longitudinal periodic arrangement.

5. The plate-like structure with vibration damping and limiting functions according to claim 1, wherein, The cable-stayed friction damping cell is composed of a damping support, a friction inner shaft, and a friction bushing; the damping support includes a planar support part connected to the upper plate and the lower plate, and also includes an inclined plane support part for connecting the friction inner shaft, and the friction bushing is arranged outside the friction inner shaft.

6. The plate-like structure with a vibration damping and limiting function according to claim 5, wherein, There is an interference fit between the friction inner shaft and the friction bushing.

7. The plate-like structure with vibration damping and limiting functions according to claim 1, wherein, The C-shaped limiting cell includes a fixed support, a C-shaped buckle, a spring, and a retaining ring; The fixed support includes a support part connected to the upper plate and the lower plate, and also includes a fixing part. An axle column connected to the C-shaped buckle is provided on the fixing part. A retaining ring is provided at the open end of the axle column. The upper and lower horizontal parts of the C-shaped buckle are sleeved on the axle column, and a spring is provided between the C-shaped buckle and the fixed support.

8. The plate-like structure with vibration damping and limiting function according to claim 7, wherein, There is a clearance fit between the fixed support and the C-shaped buckle, and the spring is sleeved on the axle column and is arranged between the C-shaped buckle, the fixing part, and the retaining ring.

9. The plate-like structure with a vibration damping and limiting function according to claim 8, wherein, A washer is also provided on the axle column, and the washer is arranged between the retaining ring and the C-shaped buckle.

10. The plate-like structure with a vibration damping and limiting function according to claim 7, wherein, The fixing part is an L-shaped structure, the side end of the support part is connected to the short end of the L-shaped structure, and the support part is parallel to the long end of the L-shaped structure.

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