Chiral ring cylindrical vibration isolation structure with lumped mass

Abstract

The application relates to a chiral ring cylindrical vibration isolation structure with concentrated mass, belonging to the technical field of periodic structure vibration isolation. The application aims to solve the problems of component wear and noise caused by vibration during mechanical movement of a rotor. The chiral ring cylindrical vibration isolation structure with concentrated mass comprises a plurality of coaxially arranged damping ring structures, an annular partition plate is arranged between two adjacent damping ring structures, an annular partition plate is arranged outside the two damping ring structures at the end portions, and all the annular partition plates are coaxially arranged with the damping ring structures. The damping ring structure comprises two kinds of oscillators which are alternately arranged in the circumferential direction, and the two kinds of oscillators are a concentrated mass oscillator and a chiral ring oscillator. The application is mainly used in the field of mechanical vibration isolation and can realize vibration isolation in a specific frequency band.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of periodic structure vibration isolation. BACKGROUND

[0002] Vibration isolation is an important problem in scientific and technological research and is widespread in most practical engineering. In the process of mechanical movement, structure and building design, vibration isolation is the first to be considered, especially in the rotor mechanical movement, the wear and tear of parts and noise caused by vibration have been a long-standing problem. Therefore, how to reduce vibration to increase the service life of mechanical parts has become the primary problem of rotor mechanical products. SUMMARY

[0003] The present application is to solve the problem of wear and tear of parts and noise caused by vibration in the rotor mechanical movement, and provides a chiral ring cylindrical vibration isolation structure with concentrated mass.

[0004] A chiral ring cylindrical vibration isolation structure with concentrated mass, comprising a plurality of coaxially arranged vibration reduction ring structures, an annular partition plate 1 is arranged between adjacent two vibration reduction ring structures, an annular partition plate 1 is arranged outside the two vibration reduction ring structures at the end, and all annular partition plates 1 are coaxially arranged with the vibration reduction ring structure,

[0005] The vibration reduction ring structure comprises two kinds of oscillators arranged alternately in the circumferential direction, and the two kinds of oscillators are concentrated mass oscillators 2 and chiral ring oscillators 3, respectively.

[0006] Further, the above-mentioned concentrated mass oscillator 2 comprises a concentrated mass block 4 and two first connecting thin plates 5, the concentrated mass block 4 is a cylindrical structure, the two first connecting thin plates 5 are fixedly connected with the outer circumference of the concentrated mass block 4, and the two first connecting thin plates 5 are coplanar with the central axis of the concentrated mass block 4,

[0007] The main shaft of the concentrated mass block 4 is arranged along the radial direction of the vibration reduction ring structure, and the free ends of the two first connecting thin plates 5 are respectively in contact with the two annular partition plates 1 adjacent to the vibration reduction ring structure.

[0008] Further, the above-mentioned chiral ring oscillator 3 comprises two second connecting thin plates 6 and an oscillator ring 7, the two second connecting thin plates 6 are fixedly connected with the outer circumference of the oscillator ring 7 and are tangent to each other, the two second connecting thin plates 6 are parallel to each other and not coplanar,

[0009] The main shaft of the oscillator ring 7 is arranged along the radial direction of the vibration reduction ring structure, and the free ends of the two second connecting thin plates 6 are respectively in contact with the two annular partition plates 1 adjacent to the vibration reduction ring structure.

[0010] Further, the material of the above-mentioned chiral ring cylindrical vibration isolation structure is structural steel.

[0011] Furthermore, the material of the aforementioned chiral ring cylindrical vibration isolation structure is aluminum.

[0012] This invention discloses a chiral ring-cylindrical vibration isolation structure with concentrated mass. Through circumferential and axial periodic structures, it achieves excellent vibration isolation and reduction characteristics in the low-frequency range, suppressing the negative vibration effects generated by the mechanical system during operation. For axial vibration reduction, this invention uses two different types of oscillators, alternately arranged circumferentially and arrayed axially, forming two periodic distributions to achieve axial vibration reduction. Specifically, the beneficial effects of this invention are:

[0013] (1) By adopting a periodic arrangement, the band gap generated by the structural characteristics can be utilized to achieve a positive vibration isolation effect in a specific frequency range.

[0014] (2) Compared with traditional rubber pad vibration isolation, it can reduce the vibration impact of different frequency bands by adjusting the number of circumferential and axial cycles.

[0015] (3) The adjustable mass and material of the concentrated mass oscillator can reduce the negative impact of resonance on the mechanical structure during operation.

[0016] (4) Adding a chiral ring oscillator can convert part of the axial deformation of the structure into torsional deformation, which enhances the axial bearing capacity of the structure and also has a better vibration isolation effect.

[0017] (5) The hollow lightweight design has a negligible impact on the natural frequency of the mechanical structure and will not affect the mechanical structure design.

[0018] This invention is primarily used in the field of mechanical vibration isolation, enabling vibration isolation within a specific frequency band. Compared to traditional rubber pad structures, it exhibits superior vibration isolation performance within a specific frequency range. Furthermore, different vibration isolation frequency bands can be adjusted according to specific operating conditions. Therefore, the described vibration isolation structure has high engineering applicability. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of a chiral ring-cylindrical vibration isolation structure with concentrated mass according to the present invention;

[0020] Figure 2 This is a front view of a chiral ring-cylindrical vibration isolation structure with concentrated mass as described in this invention;

[0021] Figure 3 for Figure 2 Top view;

[0022] Figure 4 A schematic diagram of a concentrated mass oscillator;

[0023] Figure 5 A structure schematic diagram of a chiral ring;

[0024] Figure 6 A transmission loss curve diagram of a chiral ring cylindrical vibration isolation structure with a concentrated mass according to the present application. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0026] DETAILED DESCRIPTION Figures 1 to 5 Specifically, the present embodiment is a chiral ring cylindrical vibration isolation structure with a concentrated mass, which comprises a plurality of coaxially arranged vibration reduction ring structures. An annular partition plate 1 is arranged between any two adjacent vibration reduction ring structures, and an annular partition plate 1 is arranged outside each of the two vibration reduction ring structures at the ends. All the annular partition plates 1 are coaxially arranged with the vibration reduction ring structures. The vibration reduction ring structure comprises two kinds of oscillators arranged alternately in the circumferential direction, which are a concentrated mass oscillator 2 and a chiral ring oscillator 3. The concentrated mass oscillator 2 and the chiral ring oscillator 3 are connected to two annular partition plates 1 at the same time to form an axial periodic unit.

[0027] The concentrated mass oscillator 2 comprises a concentrated mass block 4 and two first connecting thin plates 5, and the two first connecting thin plates 5 have the same thickness. The concentrated mass block 4 is in a cylindrical structure, and the two first connecting thin plates 5 are fixedly connected to the outer circumference of the concentrated mass block 4, and the two first connecting thin plates 5 are coplanar with the central axis of the concentrated mass block 4. The main axis of the concentrated mass block 4 is arranged in the radial direction of the vibration reduction ring structure, and the free ends of the two first connecting thin plates 5 are respectively in contact with the two annular partition plates 1 adjacent to the vibration reduction ring structure.

[0028] The chiral ring oscillator 3 comprises two second connecting thin plates 6 and an oscillator ring 7, and the two second connecting thin plates 6 have the same thickness. The two second connecting thin plates 6 are fixedly connected to the outer circumference of the oscillator ring 7 and are tangent to the outer circumference of the oscillator ring 7, and the two second connecting thin plates 6 are parallel to each other but not coplanar. The main axis of the oscillator ring 7 is arranged in the radial direction of the vibration reduction ring structure, and the free ends of the two second connecting thin plates 6 are respectively in contact with the two annular partition plates 1 adjacent to the vibration reduction ring structure.

[0029] The vibration isolation structure is connected between a mechanical system requiring vibration isolation of a specific frequency band and a foundation, when the mechanical system operates to generate vibration, elastic waves pass through the periodically arranged vibration isolation structure, and the band gap characteristics of the artificial periodic structure are used to reduce the propagation performance of elastic waves and vibration in a certain frequency range, so that the purpose of vibration isolation and noise reduction is achieved, and the vibration isolation effect in a specific frequency band is achieved under the influence of the band gap mechanism.

[0030] The application can also be regarded as a blade-type metamaterial pipeline for vibration reduction and noise reduction, and provides a new idea for further development of periodic structure or phononic crystal elastic wave metamaterials.

[0031] The pipeline of the application is composed of ordinary structural steel or natural materials, and compared with other metamaterial structures, it is easy to purchase, assemble and process, and the cost is slightly higher than that of ordinary pipelines, but the vibration isolation and noise reduction effect is obvious.

[0032] The cylindrical structure with a concentrated mass can be used for vibration isolation foundation support of a rotor mechanical operation. Compared with the traditional rubber pad support, the periodic frequency band gap vibration isolation design scheme is more targeted, the vibration isolation effect in a specific frequency range is more effective, and the vibration isolation effect of different frequency bands can be achieved by increasing or reducing the number of periods.

[0033] Although the application is described herein with reference to specific embodiments, it should be understood that these examples are merely illustrative of the principles and applications of the application. It should therefore be understood that numerous modifications can be made to the exemplary embodiments, and that other arrangements can be devised without departing from the spirit and scope of the application as defined in the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways other than those described by the original claims. It should also be understood that features described in connection with individual embodiments can be used in other described embodiments.

Claims

1. A chiral ring cylindrical vibration isolation structure with lumped mass, characterized in that, The chiral ring cylindrical vibration isolation structure comprises a plurality of coaxially arranged damping ring structures, an annular partition plate (1) is arranged between two adjacent damping ring structures, an annular partition plate (1) is arranged outside two damping ring structures at the end portions, all annular partition plates (1) are coaxially arranged with the damping ring structures, The damping ring structure comprises two kinds of oscillators arranged alternately in the circumferential direction, and the two kinds of oscillators are a lumped mass oscillator (2) and a chiral ring oscillator (3) respectively. The lumped mass oscillator (2) comprises a lumped mass block (4) and two first connecting thin plates (5), the lumped mass block (4) is in a cylindrical structure, the two first connecting thin plates (5) are fixedly connected with the outer circumferences of the lumped mass block (4), and the two first connecting thin plates (5) are coplanar with the central axis of the lumped mass block (4), The main shaft of the lumped mass block (4) is arranged in the radial direction of the damping ring structure, and the free ends of the two first connecting thin plates (5) are respectively in contact with the two annular partition plates (1) adjacent to the damping ring structure. The chiral ring oscillator (3) comprises two second connecting thin plates (6) and an oscillator ring (7), the two second connecting thin plates (6) are fixedly connected with the outer circumferences of the oscillator ring (7) and are tangent to the outer circumferences, the two second connecting thin plates (6) are parallel to each other and are not coplanar, The main shaft of the oscillator ring (7) is arranged in the radial direction of the damping ring structure, and the free ends of the two second connecting thin plates (6) are respectively in contact with the two annular partition plates (1) adjacent to the damping ring structure.

2. The chiral ring cylindrical vibration isolation structure with a concentrated mass according to claim 1, characterized in that, The material of the chiral ring cylindrical vibration isolation structure is structural steel.

3. The chiral ring cylindrical vibration isolation structure with a concentrated mass according to claim 2, characterized in that, The material of the chiral ring cylindrical vibration isolation structure is aluminum.

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