Vibration damping device and preparation method thereof

Abstract

The invention discloses a vibration damping device and a preparation method thereof. The vibration damping device comprises a shell, a containing cavity is formed in the shell, a first limiting part and a second limiting part are alternately arranged in the containing cavity, and the adjacent first limiting part and second limiting part are connected; the first limiting part is provided with a plurality of first limiting cavities, the first limiting cavities extend along a curve, and each first limiting cavity communicates with at least two adjacent first limiting cavities; the second limiting part is provided with a plurality of second limiting cavities, and each second limiting cavity communicates with at least one first limiting cavity on the two sides of the second limiting part; the first limiting cavity and the second limiting cavity are respectively filled with damping particles; a plurality of cooling flow channels are formed in the side wall of the inner ring of the shell. The device can stably absorb the vibration of a vibration source for a long time, can realize the consideration of rigidity and damping characteristics, and can effectively dissipate the vibration energy.

Description

Technical Field

[0001] This application relates to the field of vibration reduction technology, specifically to a vibration damping device and its preparation method. Background Technology

[0002] In high-end equipment manufacturing, the main technical approaches to suppress the vibration of mechanical structures include: external dampers, which involve installing tuned mass dampers (TMDs) on the outside of the vibrating structure; injection of polymer materials, which involves injecting epoxy resin or viscoelastic materials into the cavity of the vibrating structure; and filling with traditional particle damping, which involves reserving a large cavity inside the vibrating structure and filling it with, for example, metal particles, to dissipate energy through collision and friction between the particles.

[0003] For the infusion of polymer materials, polymer materials are prone to failure in high temperature, low temperature or corrosive environments, have poor environmental adaptability, and cannot bear structural loads.

[0004] For traditional particle damping solutions, due to the large cavity volume and lack of internal constraints, particles are prone to settling and accumulating. For example, particles may settle to the bottom under gravity or be pressed to one side under centrifugal force. This can result in local areas of the structure (such as the top) being completely devoid of damping particles, and the particles in the accumulated layer being unable to move due to excessive mutual compression, leading to a significant decrease in damping effect and directional sensitivity (i.e., different damping effects in different installation directions). In addition, the large cavity structure can lead to a significant reduction in the overall rigidity of the structure (especially in thin-walled areas), resulting in a large loss of rigidity, which is not conducive to precision machining scenarios. Summary of the Invention

[0005] This application provides a vibration damping device and its preparation method to reduce the possibility of damping particle settling and improve the damping effect on vibration source vibration.

[0006] In a first aspect, this application provides a vibration damping device, including a housing with a receiving space for accommodating a rotating or non-rotating component, the receiving space being coaxially arranged with the housing. An accommodating cavity is provided inside the housing, the accommodating cavity being continuously arranged along the circumference of the housing, and the accommodating cavity having a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion being alternately arranged along the circumference of the housing, with adjacent first limiting portions and second limiting portions connected. The first limiting portion has a plurality of first limiting chambers, the first limiting chambers extending along a curve, each first limiting chamber communicating with at least two adjacent first limiting chambers. The second limiting portion has a plurality of second limiting chambers, each second limiting chamber communicating with at least one first limiting chamber on one side of the second limiting portion and with at least one first limiting chamber on the other side of the second limiting portion along the circumference of the housing. At least a portion of the first limiting chamber and at least a portion of the second limiting chamber are respectively filled with damping particles. The damping particles in each of the first limiting chambers can flow to the first limiting chamber connected to that first limiting chamber, and the damping particles in each of the second limiting chambers can flow to the first limiting chamber connected to that second limiting chamber. The receiving cavity causes the housing to form an inner ring sidewall and an outer ring sidewall. In the radial direction of the housing, the inner ring sidewall is located between the receiving cavity and the receiving space, and the outer ring sidewall is located on the side of the receiving cavity opposite to the receiving space. The inner ring sidewall is provided with a plurality of cooling channels. Each cooling channel extends from a first end to a second end in the axial direction of the housing. The plurality of cooling channels are spaced apart in the circumferential direction of the housing. The plurality of cooling channels are connected to a cooling medium inlet and a cooling medium outlet.

[0007] In one specific possible implementation, the second limiting chamber extends along a curve.

[0008] In one specific implementation, the density of the first limiting chamber located radially away from the receiving space in the housing is greater than the density of the first limiting chamber located closer to the receiving space.

[0009] In one specific implementation, the damping particle is spherical, and the particle size of the damping particle is R1, wherein 50μm≤R1≤300μm; the minimum cross-sectional dimension of the first limiting chamber is R2, wherein 10xR1≤R2≤50xR1.

[0010] In one specific implementation, the cross-sectional area of ​​the second limiting chamber is smaller than that of the first limiting chamber; the density of the second limiting chamber is smaller than that of the first limiting chamber.

[0011] In one specific implementation, the damping particles are made of metal.

[0012] In one specific implementation, the damping particles are made of tungsten alloy.

[0013] In one specific implementation scheme, the cooling channel has an inlet end and an outlet end, the inlet end and the outlet end being located at the first end of the housing; the first end of the housing is provided with a first confluence channel and a second confluence channel, the first confluence channel extending circumferentially along the housing, the cooling medium inlet communicating with the first confluence channel, and the inlet ends of the plurality of cooling channels communicating with the first confluence channel respectively; the second confluence channel extending circumferentially along the housing, the second confluence channel and the first confluence channel being spaced apart axially and / or radially in the housing, the cooling medium outlet communicating with the second confluence channel, and the outlet ends of the plurality of cooling channels communicating with the second confluence channel respectively.

[0014] In one specific implementation, the cooling medium inlet and the cooling medium outlet are respectively located on the end face of the first end of the housing, and the cooling medium inlet and the cooling medium outlet are spaced apart in the circumferential direction of the housing.

[0015] Secondly, this application also provides a preparation method for preparing a vibration damping device as described in any of the feasible embodiments of the first aspect above. The preparation method includes the following steps: The shell is integrally formed by additive manufacturing process. The first limiting part, the second limiting part and the cooling channel are formed at the same time as the shell. A powder discharge hole is formed at one end of the shell in the axial direction. The powder discharge hole is connected to the first limiting part, the second limiting part and the cooling channel respectively. The powder remaining from the molding process in the first limiting part, the second limiting part, and the cooling channel is removed through the powder discharge hole; Damping particles are filled into the first limiting part and the second limiting part through the powder discharge hole, respectively; Seal the powder discharge hole.

[0016] In one specific implementation scheme, before filling the first limiting portion and the second limiting portion with damping particles through the powder discharge hole, the process channel connecting the powder discharge hole and the cooling flow channel is blocked.

[0017] Compared with the prior art, the beneficial effects of this application are as follows: Firstly, the inner ring sidewall of the shell is in direct contact with the vibration source, and the first and second limiting parts are also in direct contact with the inner ring sidewall of the shell. The first and second limiting parts can directly transmit the vibration of the vibration source to the damping particles, which can shorten the distance between the damping particles and the vibration source. Moreover, compared with the design where the damping particles are filled in a large cavity, only a small number of damping particles are in direct contact with the cavity sidewall, and the remaining damping particles are in contact with the portion of damping particles, this device can realize that most of the damping particles directly absorb the vibration of the vibration source. The vibration mode of the damping particles has a greater change in comparison, and the absorption effect of the vibration source is better. Secondly, the first limiting part and the second limiting part are connected to each other to form an integral structure. Each limiting part has a limiting chamber. Each first limiting chamber is connected to at least two adjacent first limiting chambers, so that the damping particles can flow between adjacent first limiting parts. Furthermore, each second limiting chamber is connected to at least one first limiting chamber on one side of the second limiting part and to at least one first limiting chamber on the other side of the second limiting part, so that the damping particles can flow across the first limiting chambers on both sides of the second limiting part, which can reduce the possibility of damping particles settling. Thirdly, the damping particles are contained in the first and second limiting chambers, which restricts the macroscopic displacement of the damping particles on a larger scale. At the same time, the first limiting chamber extends along a curve, and the flow of the damping particles in the first limiting chamber and between adjacent first limiting chambers needs to be bypassed. Moreover, the flow path of the damping particles is regularized, that is, the flow of the damping particles is in a predictable state. As a result, the damping particles are not easy to settle, the damping ratio increases, and the possibility of damping particle settlement is further reduced, reducing the impact of damping particle settlement on the damping effect. The damping effect is more ideal, and the absorption effect on the vibration source is further improved. Fourthly, the cooperation of the first limiting part, the second limiting part and the shell can significantly improve the overall rigidity of the device, avoid thin-walled chatter, and facilitate precision machining scenarios. Fifthly, regarding the heat energy generated by the conversion of vibration energy by this device, the first limiting part, the second limiting part, and the damping particles can more fully guide the heat to the side wall of the shell, including to the cooling channel. The setting of the first limiting part and the second limiting part can not only prevent the damping particles from settling and accumulating, but also prevent the damping particles from overheating during long-term operation and affecting the damping effect. Moreover, the combination of the first limiting part, the second limiting part, and the damping particles can significantly improve the thermal conductivity, which is significantly better than the traditional damping technology of "large cavity + particles", making it easier to keep the operating temperature of this device and the vibration source within a reasonable range. Attached Figure Description

[0018] Figure 1 A front sectional view of the vibration damping device provided in this application is shown; Figure 2 It shows Figure 1 A partial view; Figure 3 A top sectional view of the vibration damping device provided in this application is shown; Figure 4 An isometric sectional view of the vibration damping device provided in this application is shown; Figure 5 A schematic diagram of the structure of the first limiting part and the second limiting part of the vibration damping device provided in this application is shown. Figure 6 A possible structural schematic diagram of the first limiting part of the vibration damping device provided in this application is shown. Figure 7 This paper shows another possible structural schematic diagram of the first limiting part of the vibration damping device provided in this application; Figure 8 This paper shows another possible structural schematic diagram of the first limiting part of the vibration damping device provided in this application; Figure 9 A possible structural schematic diagram of the first limiting part of the vibration damping device provided in this application is shown. Figure 10 A schematic diagram of the cooling channel structure of the vibration damping device provided in this application is shown.

[0019] Figure label: 1-Housing; 11-Inner ring sidewall; 111-Cooling flow channel; 112-First confluence channel; 113-Second confluence channel; 12-Outer ring sidewall; 2-First limiting part; 21-First limiting chamber; 3-Second limiting part; 31-Second limiting chamber; 4-Main spindle stator. Detailed Implementation

[0020] To make the technical objectives, solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. The same reference numerals in the figures denote the same or similar structures, and therefore repeated descriptions of them will be omitted. The terms expressing position and direction described in the embodiments of this application are illustrative based on the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this application. The accompanying drawings of the embodiments of this application are only for illustrating relative positional relationships and do not represent actual scale.

[0021] Specific details are set forth in the following description to aid in understanding this application; however, embodiments of this application can be implemented in various ways other than those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the embodiments of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0022] Figure 1 This paper shows a front sectional view of the vibration damping device provided in this application. Figure 2 It shows Figure 1 A partial view, Figure 3 A top sectional view of the vibration damping device provided in this application is shown. Figure 4 An isometric sectional view of the vibration damping device provided in this application is shown. Figure 5 A schematic diagram of the structure of the first limiting part and the second limiting part of the vibration damping device provided in this application is shown. Figure 6 A schematic diagram of a possible structure of the first limiting part of the vibration damping device provided in this application is shown. Figure 7 This paper presents a schematic diagram of another possible structure of the first limiting part of the vibration damping device provided in this application. Figure 8 This diagram illustrates another possible structural schematic of the first limiting portion of the vibration damping device provided in this application. Referring to the above figures, the vibration damping device provided in this embodiment may include a housing 1, which can withstand external loads. The housing 1 has a receiving space that can accommodate rotating or non-rotating components, and the receiving space is coaxially arranged with the housing 1. See also... Figure 1 In the coordinate system, the x-axis represents the radial direction of housing 1, the y-axis represents the axial direction of housing 1, and the z-axis represents the circumferential direction of housing 1; the meanings of the coordinate directions in other figures are the same. Figure 1 .

[0023] In specific implementation, the housing 1 has an internal receiving cavity, which is continuously arranged along the circumference of the housing 1. The receiving cavity has a first limiting part 2 and a second limiting part 3, which are alternately arranged along the circumference of the housing 1. Adjacent first limiting parts 2 and second limiting parts 3 along the circumference of the housing 1 are connected, and the first limiting parts 2 and second limiting parts 3 together occupy the entire receiving cavity. For example, Figure 6 , 7 As shown in Figure 8, the first limiting part 2 has multiple first limiting chambers 21, which extend along a curve, and each first limiting chamber 21 communicates with at least two adjacent first limiting chambers 21. The second limiting part 3 has multiple second limiting chambers 31. In the circumferential direction of the housing 1, each second limiting chamber 31 communicates with at least one first limiting chamber 21 on one side of the second limiting part 3 and with at least one first limiting chamber 21 on the other side of the second limiting part 3, that is, the second limiting chamber 31 can communicate with the first limiting chambers 21 on both sides of the second limiting part 3. The first limiting part 2 with multiple first limiting chambers 21 and the second limiting part 3 with multiple second limiting chambers 31 divide the entire receiving cavity into multiple small, spatially confined but interconnected chambers, making the entire receiving cavity a spatially continuous, dense chamber structure. Compared to the housing 1, which has a larger cavity and does not have the first limiting part 2 and the second limiting part 3 as described above, the first limiting part 2, the second limiting part 3 and the housing 1 work together to improve the overall rigidity of the device.

[0024] In a specific implementation, at least a portion of the first limiting chamber 21 and at least a portion of the second limiting chamber 31 are respectively filled with damping particles. The damping particles filled in each first limiting chamber 21 can flow to the first limiting chamber 21 connected to the first limiting chamber 21, and the damping particles filled in each second limiting chamber 31 can flow to the first limiting chamber 21 connected to the second limiting chamber 31. The second limiting chamber 31 can realize the flow of damping particles across the first limiting chambers 21 on both sides of the second limiting part 3. On the one hand, the damping particles filled in the first limiting chamber 21 and the second limiting chamber 31 serve as discrete damping media, which can absorb the vibration of the vibration source (the aforementioned rotating or non-rotating component). On the other hand, the damping particles are confined within their respective limiting chambers, and the macroscopic displacement of the damping particles under the action of gravity or inertial force is restricted. Regardless of the gravity or inertial force attitude of the shell 1, the damping particles will not undergo large-scale macroscopic migration, which can greatly eliminate the settling and accumulation of damping particles, ensure a uniform damping effect in all directions, and reduce directional sensitivity. This ensures that the device has consistent damping performance in different installation directions (vertical, horizontal, or inverted, etc.), and can solve the problem of damping anisotropy.

[0025] In specific implementation, the cavity is configured such that the housing 1 has an inner ring sidewall 11 and an outer ring sidewall 12, as well as a top sidewall and a bottom sidewall. The inner ring sidewall 11 and the outer ring sidewall 12 are fitted together radially and spaced apart, while the top sidewall and the bottom sidewall are spaced apart axially. Axially, one end of the inner ring sidewall 11 and one end of the outer ring sidewall 12 are connected by the top sidewall, and the other end of the inner ring sidewall 11 and the other end of the outer ring sidewall 12 are connected by the bottom sidewall. Thus, the inner ring sidewall 11, the outer ring sidewall 12, the top sidewall, and the bottom sidewall enclose and form the housing 1 with the aforementioned cavity. Radially, the inner ring sidewall 11 is located between the cavity and the receiving space, and the outer ring sidewall 12 is located on the side of the cavity opposite to the receiving space. The inner ring sidewall 11 has multiple cooling channels 111 inside. Each cooling channel 111 extends from a first end to a second end along the axial direction of the housing 1, meaning each cooling channel 111 is arranged along the axial direction of the housing 1. The multiple cooling channels 111 are spaced apart circumferentially around the housing 1. All multiple cooling channels 111 are connected to a common cooling medium inlet and a common cooling medium outlet. In practical applications, the cooling medium can enter each cooling channel 111 through the cooling medium inlet, and the cooling medium in each cooling channel 111 can flow out through the cooling medium outlet. This dissipates the heat generated by the vibration of the damping particles, thus maintaining the operating temperature of the device and the vibration source within a reasonable range. Specifically, the cooling medium inlet and outlet can be connected to an external cold source, such as a standard industrial chiller, to supply cooling medium to each cooling channel 111 and to circulate the cooling medium.

[0026] In practical applications, the vibration damping device provided in this application embodiment can have its housing 1 fitted onto the vibration source (rotating or non-rotating component). By utilizing the repeated friction and collision between the damping particles or between the damping particles and the walls of the limiting chambers (first limiting chamber 21, second limiting chamber 31), the vibration characteristics of the device are changed, and the vibration energy is converted into heat energy and dissipated, thereby absorbing the vibration of the vibration source and achieving the purpose of vibration reduction and noise reduction of the vibration source.

[0027] In practical applications, firstly, the inner ring sidewall 11 of the housing 1 is in direct contact with the vibration source, and the first limiting part 2 and the second limiting part 3 are also in direct contact with the inner ring sidewall 11 of the housing 1. The first limiting part 2 and the second limiting part 3 can directly transmit the vibration of the vibration source to the damping particles, which can shorten the distance between the damping particles and the vibration source. Moreover, compared with the design where the damping particles are filled in a large cavity, only a small number of damping particles are in direct contact with the cavity sidewall, and the remaining damping particles are in contact with the portion of damping particles, this device can realize that most of the damping particles directly absorb the vibration of the vibration source. The vibration mode of the damping particles has a greater change in comparison, and the absorption effect of the vibration source is better.

[0028] Secondly, the first limiting part 2 and the second limiting part 3 are connected to each other to form an integral structure. Each limiting part has a limiting chamber (the first limiting part 2 has a first limiting chamber 21, and the second limiting part 3 has a second limiting chamber 31). Each first limiting chamber 21 is connected to at least two adjacent first limiting chambers 21, so that the damping particles can flow between adjacent first limiting parts 2. Furthermore, each second limiting chamber 31 is connected to at least one first limiting chamber 21 on one side of the second limiting part 3 and to at least one first limiting chamber 21 on the other side of the second limiting part 3, so that the damping particles can flow across the first limiting chambers 21 on both sides of the second limiting part 3, thereby reducing the possibility of damping particle settling.

[0029] Thirdly, the damping particles are contained within the first limiting chamber 21 and the second limiting chamber 31, which restricts the macroscopic displacement of the damping particles on a larger scale. At the same time, the first limiting chamber 21 extends along a curve, and the flow of the damping particles within the first limiting chamber and between adjacent first limiting chambers 21 needs to be bypassed. Moreover, the flow path of the damping particles is regularized (flowing along the curved shape of the first limiting chamber 21), that is, the flow of the damping particles is predictable. As a result, the damping particles are less likely to settle, the damping ratio increases, and the possibility of damping particle settlement is further reduced, thus reducing the impact of damping particle settlement on the damping effect. The damping effect is more ideal, and the absorption effect on the vibration source is further improved.

[0030] Fourthly, the cooperation of the first limiting part 2, the second limiting part 3, and the housing 1 can significantly improve the overall rigidity of the device, avoid thin-walled chatter, and facilitate precision machining scenarios.

[0031] Fifthly, regarding the heat energy generated by the conversion of vibration energy in this device, the first limiting part 2, the second limiting part 3, and the damping particles can more fully guide the heat to the side wall of the shell 1, including guiding it to the cooling channel 111. The arrangement of the first limiting part 2 and the second limiting part 3 not only prevents the damping particles from settling and accumulating, but also prevents the damping particles from overheating during long-term operation and affecting the damping effect. Furthermore, the combination of the first limiting part 2, the second limiting part 3, and the damping particles can significantly improve the thermal conductivity, which is significantly better than the traditional damping technology of "large cavity + particles," making it easier to keep the operating temperature of this device and the vibration source within a reasonable range.

[0032] Overall, the vibration damping device provided in this application embodiment can absorb vibrations from the vibration source in a long-term and stable manner. It can effectively absorb vibrations in both wide and narrow frequency ranges. In addition, it has high rigidity, achieving a balance between rigidity and damping characteristics. The overall rigidity and damping characteristics can be balanced in a relatively ideal state. Furthermore, it can effectively dissipate vibration energy and has a long service life.

[0033] As one possible application scenario, this device can be applied to rotating and non-rotating components. For example, rotating components can be spindle rotors, shafts, etc. Under the action of high-speed rotating centrifugal force, the damping particles of this device will not "lock up" or "clump together," resulting in stable damping effect. Non-rotating components can be spindle stators, cantilever / cantilever components (such as machine tool holders), etc. This device can absorb the vibrations of long-term, stable operation of non-rotating components, providing excellent damping effect. Figure 1 The example illustrates a scenario where this device is applied to the spindle stator 4.

[0034] As one possible implementation, the second limiting chamber 31 extends along a curve. The flow of damping particles within the second limiting chamber 31, between the first limiting chamber 21 and the second limiting chamber 31, and across the first limiting chamber 21 on both sides of the second limiting part 3 also needs to be bypassed. The flow path of the damping particles is more regular, and the flow of the damping particles is in a more predictable state, which can further reduce the possibility of damping particle settling.

[0035] like Figure 5 As shown, the cross-sectional area of ​​the second limiting chamber 31 is smaller than that of the first limiting chamber 21. The second limiting part 3 has a stronger structure, which can compensate for the loss of rigidity of the shell 1 caused by the setting of the receiving cavity to a certain extent, and further improve the overall rigidity of the device.

[0036] Figure 9 A schematic diagram of a possible structure of the first limiting part of the vibration damping device provided in this application is shown. Figure 9 As shown, the density of the first limiting chamber 21 located in the region far from the containing space in the radial direction of the shell 1 is greater than the density of the first limiting chamber 21 located in the region close to the containing space. That is, in the radial direction of the shell 1, the density of the first limiting chamber 21 decreases from the region far from the containing space to the region close to the containing space. More first limiting chambers 21 are provided in the region further away from the containing space, so that the damping particles in the far side of the containing cavity are less likely to settle or accumulate due to gravity or inertial force.

[0037] In actual implementation, the damping particles can be spherical, with a particle size of R1, where 50μm≤R1≤300μm; the minimum cross-sectional dimension of the first limiting chamber 21 is R2, where 10xR1≤R2≤50xR1, that is, R2 is 10 to 50 times R1. This relative design can both limit the macroscopic displacement of the damping particles on a larger scale and reduce the possibility of the damping particles settling or accumulating.

[0038] In actual setup, the density of the second limiting chamber 31 is less than that of the first limiting chamber 21, the wall thickness between adjacent second limiting chambers 31 is greater than that between adjacent first limiting chambers 21, and the rigidity of the second limiting part 3 is greater than that of the first limiting part 2. This allows the second limiting part 3 to play a greater role in improving the overall rigidity of the device, resulting in a more balanced overall rigidity and damping characteristics of the device.

[0039] In practical implementation, the damping particles can be high-density particles that can withstand high temperatures, high pressures, radiation, and vacuum environments, thus extending their service life. The materials of the damping particles and the shell 1 can be heterogeneous, allowing for enhanced kinetic energy exchange through density differences. This makes it easier for the damping particles to absorb vibrations from the shell 1, i.e., more easily, thus improving the damping effect. The density of the damping particle material can be greater than that of the shell 1 material, resulting in stronger inertia and more effective modification of damping characteristics, leading to better damping performance. For example, the damping particles can be made of metal; specifically, they can be high-density alloy powder or ceramic particles (such as zirconia ceramic spheres), and more specifically, tungsten alloy. Furthermore, the melting point of the damping particle material can be higher than the heat treatment temperature of the shell 1 material, resulting in stronger high-temperature resistance and more stable damping characteristics of the device.

[0040] Figure 10 A schematic diagram of the cooling channel structure of the vibration damping device provided in this application is shown. Figure 10As shown, the cooling channel 111 has an inlet end and an outlet end, which are located at the first end of the shell 1, i.e., the inlet end and the outlet end are located at the same end of the shell 1. The first end of the shell 1 is provided with a first confluence channel 112 and a second confluence channel 113. The first confluence channel 112 extends circumferentially along the shell 1, and the cooling medium inlet is connected to the first confluence channel 112. The inlet ends of multiple cooling channels 111 are respectively connected to the first confluence channel 112 to communicate with the cooling medium inlet. The second confluence channel 113 extends circumferentially along the shell 1, and the second confluence channel 113 and the first confluence channel 112 are spaced apart in the axial and / or radial direction of the shell 1. The cooling medium outlet is connected to the second confluence channel 113, and the outlet ends of multiple cooling channels 111 are respectively connected to the second confluence channel 113 to communicate with the cooling medium outlet. In this way, a cooling medium loop with full coverage, efficient heat exchange and relatively simple connection relationship can be constructed. Furthermore, based on different heat dissipation requirements, similar cooling channels can also be provided inside the outer ring sidewall 12 of the housing 1, and the arrangement can refer to the cooling channel 111 inside the inner ring sidewall 11. Specifically, the cooling medium inlet and cooling medium outlet can be located on the end face of the first end of the housing 1, and the cooling medium inlet and cooling medium outlet are spaced apart in the circumferential direction of the housing 1 to facilitate connection with an external cold source.

[0041] This application also provides a method for preparing the vibration damping device in the above embodiments, including the following steps: The housing 1 is integrally formed by additive manufacturing processes, for example, by powder bed melting (SLM); a receiving cavity is formed simultaneously with the housing 1, and a first limiting part 2 having a first limiting chamber 21 and a second limiting part 3 having a second limiting chamber 31 are formed within the receiving cavity; a cooling channel 111 is formed simultaneously with the housing 1; and a powder discharge hole is formed at one end of the housing 1 in the axial direction, and a process channel connecting the powder discharge hole with the first limiting part 2, the second limiting part 3 and the cooling channel 111 is formed simultaneously with the housing 1, so that the powder discharge hole can be connected to the first limiting part 2, the second limiting part 3 and the cooling channel 111 respectively. Powder (e.g., unmelted shell 1 molding powder) remaining in the first limiting part 2, the second limiting part 3, and the cooling channel 111 is removed through the powder discharge hole; Damping particles are filled into the first limiting part 2 and the second limiting part 3 through the powder discharge hole; multidimensional vibration is applied during the filling process to ensure that more of the damping particles enter the first limiting chamber 21 and the second limiting chamber 31. The powder discharge hole is sealed, for example, by welding or using a mechanical seal to permanently block it. Vibration damping devices manufactured using this integrated method have lower maintenance costs compared to structures requiring multiple components.

[0042] In specific implementation, before filling the first limiting part 2 and the second limiting part 3 with damping particles through the powder discharge hole, the process channel connecting the powder discharge hole and the cooling channel 111 is blocked to prevent the damping particles from entering the cooling channel 111.

[0043] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited to the above embodiments. Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope and spirit of this application. If these modifications and variations fall within the scope of the claims of this application and their equivalents, then the intent of this application also includes these modifications and variations.

Claims

1. A vibration damping device, characterized in that, The device includes a housing with a receiving space for accommodating a rotating or non-rotating component, the receiving space being coaxially arranged with the housing. The housing has an internal receiving cavity, which is continuously arranged along the circumference of the housing. The receiving cavity is provided with a first limiting part and a second limiting part, which are alternately arranged along the circumference of the housing. Adjacent first limiting parts and second limiting parts are connected. The first limiting part has a plurality of first limiting chambers, the first limiting chambers extend along a curve, and each first limiting chamber communicates with at least two adjacent first limiting chambers; The second limiting part has a plurality of second limiting chambers. In the circumferential direction of the housing, each second limiting chamber communicates with at least one first limiting chamber on one side of the second limiting part and with at least one first limiting chamber on the other side of the second limiting part. At least a portion of the first limiting chamber and at least a portion of the second limiting chamber are respectively filled with damping particles. The damping particles filled in each first limiting chamber can flow to the first limiting chamber connected to the first limiting chamber, and the damping particles filled in each second limiting chamber can flow to the first limiting chamber connected to the second limiting chamber. The receiving cavity gives the housing an inner ring sidewall and an outer ring sidewall. In the radial direction of the housing, the inner ring sidewall is located between the receiving cavity and the receiving space, and the outer ring sidewall is located on the side of the receiving cavity opposite to the receiving space. The inner ring sidewall is provided with a plurality of cooling channels. Each cooling channel extends from a first end to a second end in the axial direction of the housing. The plurality of cooling channels are spaced apart in the circumferential direction of the housing. The plurality of cooling channels are connected to a cooling medium inlet and a cooling medium outlet.

2. The vibration damping device of claim 1, wherein The second limiting chamber extends along the curve.

3. A vibration damping device according to claim 1 or 2, characterized in that The density of the first limiting chamber located radially away from the receiving space in the housing is greater than the density of the first limiting chamber located closer to the receiving space.

4. The vibration damping device according to any one of claims 1 to 3, characterized by The damping particles are spherical, and the particle size of the damping particles is R1, wherein 50μm≤R1≤300μm; The minimum cross-sectional dimension of the first limiting chamber is R2, where 10xR1≤R2≤50xR1.

5. The vibration damping device according to any one of claims 1 to 4, characterized by The cross-sectional area of ​​the second limiting chamber is smaller than that of the first limiting chamber; The density of the second limiting chamber is less than the density of the first limiting chamber.

6. The vibration damping device according to any one of claims 1 to 5, characterized by The damping particles are made of metal.

7. The vibration damping device of claim 6, wherein The damping particles are made of tungsten alloy.

8. The vibration damping device according to any one of claims 1 to 7, characterized by The cooling channel has an inlet end and an outlet end, and the inlet end and the outlet end are respectively located at the first end of the housing; The first end of the housing is provided with a first confluence channel and a second confluence channel. The first confluence channel extends circumferentially along the housing. The cooling medium inlet is connected to the first confluence channel. The inlet ends of the plurality of cooling channels are respectively connected to the first confluence channel to communicate with the cooling medium inlet. The second confluence channel extends circumferentially along the housing. The second confluence channel and the first confluence channel are spaced apart in the axial and / or radial direction of the housing. The cooling medium outlet is connected to the second confluence channel. The outlet ends of the plurality of cooling channels are respectively connected to the second confluence channel to communicate with the cooling medium outlet.

9. A vibration damping device according to any one of claims 1 to 8, characterized in that The cooling medium inlet and the cooling medium outlet are respectively located on the end face of the first end of the housing, and the cooling medium inlet and the cooling medium outlet are spaced apart in the circumferential direction of the housing.

10. A method of manufacture for producing a vibration damping device as claimed in any one of claims 1 to 9, characterized in that, include: The shell is integrally formed by additive manufacturing process. The first limiting part, the second limiting part and the cooling channel are formed at the same time as the shell. A powder discharge hole is formed at one end of the shell in the axial direction. The powder discharge hole is connected to the first limiting part, the second limiting part and the cooling channel respectively. The powder remaining from the molding process in the first limiting part, the second limiting part, and the cooling channel is removed through the powder discharge hole; Damping particles are filled into the first limiting part and the second limiting part through the powder discharge hole, respectively; Seal the powder discharge hole.

11. The preparation method according to claim 10, characterized in that: Before filling the first limiting part and the second limiting part with damping particles through the powder discharge hole, the process channel connecting the powder discharge hole and the cooling flow channel is blocked.

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