Rotor system vibration reduction device based on pressure-twist metamaterials

Abstract

The application discloses a rotor system damping device based on a pressure-torsion metamaterial, which comprises a damping device outer ring, a pressure-torsion metamaterial structure unit with a hollow structure, and a bearing; the damping device outer ring is coaxially arranged with the bearing; a plurality of the pressure-torsion metamaterial structure units are uniformly filled between the damping device outer ring and the bearing outer ring; the material stiffness of the pressure-torsion metamaterial structure unit is smaller than that of the bearing and the damping device outer ring, and the pressure-torsion metamaterial structure unit can produce torsional deformation when being subjected to a pressing force, thereby converting the lateral vibration of the rotor system into axial motion, so that the damping of the rotor system is realized. The application utilizes the special mechanical properties of the pressure-torsion metamaterial, effectively suppresses the lateral vibration of the rotor system through vibration conversion, and has the advantages of simple structure and strong applicability compared with the traditional rotor system damping device, and is suitable for the vibration suppression of small-sized high-speed rotor systems.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction device technology, and in particular to a vibration reduction device for a rotor system based on a compression-torsion metamaterial. Background Technology

[0002] Rotor-bearing systems, as core components in rotating machinery, are widely used in industrial machinery and vehicles. However, during high-speed operation, they are often accompanied by vibration and noise problems caused by unbalanced forces or eccentricity between mass and excitation. These problems not only affect the stability and efficiency of the equipment, but may also shorten the service life of the equipment and, in extreme cases, induce safety accidents.

[0003] For vibration reduction measures commonly used in rotating machinery, such as dampers, the requirements for achieving effective vibration reduction in high-speed rotor-bearing systems, especially small high-speed rotor systems such as turbocharger rotor systems, which operate in complex environments are stringent, and they do not have universal applicability.

[0004] Therefore, it is necessary to design a simple and widely applicable rotor system vibration damping device for this type of rotor-bearing system with small and high-speed characteristics, to overcome the shortcomings of traditional vibration damping devices and achieve vibration suppression of the rotor-bearing system. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings and defects of the prior art and provide a simple and highly applicable rotor system vibration reduction device based on compressive-torsional metamaterials. By utilizing the characteristic that compressive-torsional metamaterial structural units will generate torsional deformation when subjected to compressive force, the lateral vibration of the rotor system is converted into axial motion, thereby reducing the vibration of the rotor system.

[0006] This invention is implemented as follows: a rotor system vibration reduction device based on a compression-torsion metamaterial includes an outer ring of the vibration reduction device, a compression-torsion metamaterial structural unit with a hollow internal structure, and a bearing; the outer ring of the vibration reduction device and the bearing are coaxially mounted; a plurality of compression-torsion metamaterial structural units are circumferentially and uniformly filled between the outer ring of the vibration reduction device and the outer ring of the bearing; the material stiffness of the compression-torsion metamaterial structural unit is smaller than that of the bearing and the outer ring of the vibration reduction device, and it can generate torsional deformation when subjected to compressive force, converting the lateral vibration of the rotor system into axial motion, thereby achieving vibration reduction of the rotor system.

[0007] The compression-torsion metamaterial structural unit is a hexahedron with six faces. Each face has an annular portion, and four connecting ribs are evenly connected to the outer circular surface of the annular portion. One connecting rib on each side is connected to two connecting ribs on two adjacent sides at the corner of the hexahedron, so that the annular portions on the six faces are connected together by the connecting ribs to form the compression-torsion metamaterial structural unit.

[0008] The shape enclosed by the top-view orthographic projection boundary of each face is a rectangle.

[0009] The inner wall of the outer ring of the vibration damping device and the outer surface of the bearing are each machined with grooves that correspond one-to-one at multiple positions, for fixing multiple compression-torsion metamaterial structural units.

[0010] The compression-torsion metamaterial structural unit is formed using photosensitive resin material.

[0011] The outer ring of the vibration damping device is fixed on the bearing seat.

[0012] Compared with the bearing and the outer ring of the vibration damping device, the compression-torsion metamaterial structural unit of the present invention has lower material stiffness and more obvious compression deformation. Therefore, by utilizing the special mechanical properties of the compression-torsion metamaterial structural unit, the lateral vibration of the rotor system can be converted into axial motion, thereby reducing the lateral vibration of the rotor system. Moreover, the structure is simple and easy to implement and install.

[0013] This invention can adjust the vibration reduction effect by changing the number of pressure-torsion metamaterial structural units in the device. It has a wide range of applications and strong applicability, and is suitable for vibration suppression of small high-speed rotor systems. Attached Figure Description

[0014] Figure 1 This is a schematic cross-sectional view of the vibration reduction device for a rotor system based on a compression-torsion metamaterial, according to an embodiment of the present invention.

[0015] Figures 2 to 5 Each of the following is a front view, top view, side view, and three-dimensional schematic diagram of the pressure-torsion metamaterial structural unit in the rotor system vibration reduction device based on pressure-torsion metamaterial, which is an embodiment of the present invention.

[0016] Figure 6 This is a schematic diagram of the outer ring of the vibration damping device in the rotor system vibration damping device based on compression-torsion metamaterials according to an embodiment of the present invention.

[0017] Figure 7 This is a schematic diagram of the outer ring of the bearing in the rotor system vibration reduction device based on compression-torsion metamaterials according to an embodiment of the present invention.

[0018] Figure 8This is a schematic diagram of the compressive deformation of a compressive-torsional metamaterial structural unit in a rotor system vibration reduction device based on a compressive-torsional metamaterial according to an embodiment of the present invention.

[0019] Numbering on the map:

[0020] 1-Outer ring of the vibration damping device; 11-First groove;

[0021] 2-Compression-torsion metamaterial structural unit, 20-First ring, 21-First connecting rib, 22-Second connecting rib, 23-Third connecting rib, 24-First side surface, 25-Top surface, 26-Second side surface;

[0022] 3-Bearing, 31-Second groove. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0024] like Figures 1 to 8 As shown, the rotor system vibration damping device based on compression-torsion metamaterials according to an embodiment of the present invention includes a vibration damping device outer ring 1, compression-torsion metamaterial structural units 2, and a bearing 3; the vibration damping device outer ring 1 and the bearing 3 are coaxially mounted; a plurality of compression-torsion metamaterial structural units 2 are circumferentially and uniformly filled between the gaps between the vibration damping device outer ring 1 and the outer ring of the bearing 3, see [reference]. Figures 2 to 5 as well as Figure 8 As shown, the compression-torsion metamaterial structural unit 2 has special mechanical properties. When the compression-torsion metamaterial structural unit 2 is subjected to compressive force, it will produce obvious torsional deformation. When the compression-torsion metamaterial structural unit is subjected to torsional deformation by external force, the compression-torsion metamaterial structural unit 2 converts the lateral vibration of the rotor system into axial motion, thereby realizing vibration reduction of the rotor system.

[0025] For a high-speed rotating rotor system, the lateral vibration amplitude is relatively small compared to its structural dimensions. Furthermore, the material stiffness of the compression-torsion metamaterial structural unit 2 is less than that of the outer ring 1 and bearing 3 of the vibration damping device. Therefore, when the vibration damping device deforms, the deformation of the outer ring 1 and bearing 3 is negligible, and the allowable deformation of the compression-torsion metamaterial structural unit 2 can meet the vibration damping requirements of the rotor system.

[0026] In order to achieve the deformation and vibration reduction functions of the compression-torsion metamaterial unit, in a preferred embodiment, the compression-torsion metamaterial structural unit 2 is made of photosensitive resin material, such as photosensitive resin material integral molding, and the outer ring 1 of the vibration reduction device can be made of steel material, metal, or alloy material.

[0027] In some embodiments, see Figure 2 To Figure 5 as well as Figure 8 As shown, the compression-torsion metamaterial structural unit is a hexahedron with six faces; each face has an annular portion, and four connecting ribs are evenly connected to the outer circumference of the annular portion. One connecting rib on each side corresponds to two connecting ribs on two adjacent sides, connecting at the corners of the hexahedron. This allows the annular portions on the six faces to be connected together via the connecting ribs, forming the compression-torsion metamaterial structural unit. Figure 5 As shown in the example, four first connecting ribs 21 are connected to the outer peripheral surface of the first annular portion 20 on the top surface 25, four second connecting ribs 23 are connected to the second annular portion of the adjacent first side surface 24, and four third connecting ribs 23 are connected to the third annular portion of the adjacent second side surface 26. The first connecting ribs 21, second connecting ribs 22, and third connecting ribs 23 are connected together to form the corner structure of the compression-torsion metamaterial structural unit. Similarly, the connecting ribs on other surfaces are connected in the same way, ultimately forming the compression-torsion metamaterial structural unit structure, as shown in the example. Figure 2 To Figure 5 as well as Figure 8 As shown.

[0028] More preferably, the shape enclosed by the top-view orthographic projection boundary of each face is rectangular. More preferably, the plurality of the compression-torsion metamaterial structural units have the same structure and size, and are evenly spaced between the outer ring 1 of the vibration damping device and the outer ring of the bearing 3.

[0029] In some embodiments, see Figure 6 , Figure 7 As shown, in order to fix the compression-torsion metamaterial structural unit between the outer ring 1 of the vibration damping device and the outer ring of the bearing 3, multiple grooves corresponding to each other are processed on the inner wall of the outer ring 1 of the vibration damping device and the outer surface of the bearing 3 (i.e. the outer surface of the bearing outer ring) to fix multiple compression-torsion metamaterial structural units. For example, the inner wall of the outer ring 1 of the vibration damping device has multiple first grooves 11, and the outer surface of the bearing 3 (i.e. the outer surface of the bearing outer ring) has multiple corresponding second grooves 31.

[0030] More preferably, the shape and size of the groove on the inner wall of the outer ring 1 of the vibration damping device and the outer surface of the bearing 3 are adapted to the mating surfaces of the compression-torsion metamaterial structural unit, so that the compression-torsion metamaterial structural unit can be installed in the groove for limiting and fixing or installation.

[0031] In practice, the outer ring 1 of the vibration damping device is fixed on the bearing seat for use.

[0032] The working process of the rotor system vibration reduction device based on compression-torsion metamaterial of the present invention is as follows:

[0033] When the rotor system is subjected to external or unbalanced excitation, excessive vibration will occur. The vibration of the rotor system will act on the compression-torsion metamaterial structural unit 2 through the bearing 3. The normal stress acting on the compression-torsion metamaterial structural unit 2 will cause it to undergo torsional vibration, converting the energy of the lateral vibration of the rotor system into axial motion, thereby achieving the purpose of reducing the vibration of the rotor system.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention.

[0035] Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of the equivalents of the claims be included within the invention.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vibration reduction device for a rotor system based on a compression-torsion metamaterial, characterized in that, The system includes an outer ring for a vibration damping device, a hollow internal compression-torsion metamaterial structural unit, and a bearing. The outer ring for the vibration damping device and the bearing are coaxially mounted. Multiple compression-torsion metamaterial structural units are circumferentially and uniformly filled between the outer ring for the vibration damping device and the outer ring for the bearing. The material stiffness of the compression-torsion metamaterial structural unit is smaller than that of the bearing and the outer ring for the vibration damping device. When subjected to compressive force, it can generate torsional deformation, converting the lateral vibration of the rotor system into axial motion, thereby achieving vibration damping of the rotor system. The compression-torsion metamaterial structural unit is a hexahedron with six faces. Each face has an annular portion, and four connecting ribs are uniformly connected to the outer circumference of the annular portion. One connecting rib on each side is connected to two connecting ribs on two adjacent sides at the corner of the hexahedron, thereby connecting the annular portions on the six faces together through the connecting ribs to form the compression-torsion metamaterial structural unit.

2. The vibration reduction device for a rotor system based on a compression-torsion metamaterial according to claim 1, characterized in that, The shape enclosed by the top-view orthographic projection boundary of each face is a rectangle.

3. The vibration reduction device for a rotor system based on a compression-torsion metamaterial according to claim 1, characterized in that, The inner wall of the outer ring of the vibration damping device and the outer surface of the bearing are each machined with grooves that correspond one-to-one at multiple positions, for fixing multiple compression-torsion metamaterial structural units.

4. The vibration reduction device for a rotor system based on a compression-torsion metamaterial according to claim 1, characterized in that, The compression-torsion metamaterial structural unit is formed using photosensitive resin material.

5. The rotor system vibration reduction device based on compression-torsion metamaterial according to claim 1, characterized in that, The outer ring of the vibration damping device is fixed on the bearing seat.

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