Silencer, silencer assembly, and server

Abstract

The present application is applied to the technical field of silencer structures, and discloses a silencer, a silencer assembly, and a server, for use in solving the problem of noise affecting the performance of a hard disk drive. The silencer comprises: an outer housing comprising a first cylinder body and a hollow cylinder bottom provided at one end of the first cylinder body; an inner housing comprising a second cylinder body and acoustic cavity walls provided at an outer peripheral portion of the second cylinder body, wherein through holes passing through the wall thickness of the second cylinder body are formed on the second cylinder body; and a base connected to at least one of the first cylinder body and the second cylinder body and located at the end of the silencer away from the cylinder bottom. The inner housing is provided in the outer housing, the end of the outer housing away from the cylinder bottom is connected to the inner housing, and the acoustic cavity walls are attached to the inner wall of the outer housing, so that the space between the inner housing and the outer housing forms a silencing cavity. The noise generated by the rotation of a fan enters the silencing cavity via inner holes of the inner housing for consumption. Using the silencer can optimize the fan noise and reduce the impact of noise on the performance of the hard disk drive.

Description

A silencer, a silencer assembly, and a server

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411980316.1, filed with the Chinese Patent Office on December 31, 2024, entitled “A silencer, silencer assembly and server”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of muffler structure technology, and in particular, to a muffler. Furthermore, this application also relates to a muffler assembly including the above-described muffler and a server including the muffler assembly. Background Technology

[0004] With the development of information technology, the types of servers are becoming more and more diverse. When servers process large amounts of data and perform complex computing tasks, the electronic components inside the server will generate significant heat.

[0005] Currently, servers primarily use fan-driven airflow to remove heat dissipated by electronic components. However, during high-speed rotation, fans generate noise of various frequencies, such as aerodynamic noise, electromagnetic noise, and vibration noise. This noise not only affects the server's working environment but can also adversely impact other delicate components inside the server. This is especially true for server hard drives, which contain precision components such as read / write heads, arms, bearings, and motors. These components are extremely sensitive to external vibrations and noise, and can easily resonate, affecting normal operation and thus impacting the read / write performance of the hard drive, or even causing premature failure.

[0006] To address the technical issues of internal server noise and hard drive resonance, related technologies have included methods such as attaching sound-absorbing cotton inside the server chassis or installing waveguide plates at the fan exhaust and intake vents to reduce noise. However, these methods are not very effective at reducing the noise of mechanical hard drives, especially in reducing the resonance noise at specific frequencies.

[0007] Therefore, there is a technical problem in the relevant technologies of how to improve the effectiveness of noise reduction for mechanical hard drives. Summary of the Invention

[0008] In view of this, according to the first aspect of this application, a muffler is provided that can improve the effectiveness of noise reduction for mechanical hard drives.

[0009] According to a second aspect of this application, a muffler assembly including the above-described muffler is provided, which can improve the effectiveness of noise reduction for mechanical hard drives.

[0010] According to a third aspect of this application, a server including the above-described muffler assembly is provided, which can improve the effectiveness of noise reduction for mechanical hard drives.

[0011] To achieve the above objectives, this application provides the following technical solution:

[0012] A silencer, comprising:

[0013] The outer shell includes a first cylindrical body and a hollow bottom disposed at one end of the first cylindrical body;

[0014] The inner shell includes a second cylinder and a acoustic cavity wall located on the outer periphery of the second cylinder. The second cylinder has a through hole that penetrates its wall thickness.

[0015] The base, connected to at least one of the first and second cylinders, is located at the end of the silencer away from the bottom of the cylinder;

[0016] The inner shell is located inside the outer shell, and the end of the outer shell away from the bottom of the cylinder is connected to the inner shell. The acoustic cavity wall is attached to the inner wall of the outer shell, so that the space between the inner shell and the outer shell forms a sound-absorbing cavity.

[0017] In one embodiment, the base is detachably connected to one of the first and second cylinders.

[0018] In one embodiment, one of the base and the first cylinder is provided with a first fastening position, and the other is provided with a second fastening position for engaging with the first fastening position.

[0019] In one embodiment, the first fastening position is an L-shaped groove provided on the base, and the L-shaped groove has an opening; the second fastening position is a protrusion provided on the first cylinder, and the protrusion enters the L-shaped groove from the opening and engages with the L-shaped groove by rotation.

[0020] In one embodiment, the base includes at least two flanges spaced apart circumferentially along the muffler, the flanges protruding from one end of the base along the axial direction of the muffler, and each flange is provided with an L-shaped groove.

[0021] The protrusion is located on the outer periphery of the first cylinder;

[0022] The base also includes a seal located within the area enclosed by all the flanges, the seal being used to make contact with the end face of the first cylinder.

[0023] In one embodiment, one of the base and the second cylinder is provided with a first threaded portion, and the other is provided with a second threaded portion for threaded connection with the first threaded portion.

[0024] In one embodiment, the base is provided with a first flared structure, the radial dimension of which gradually increases from one end near the inner shell to the other end away from the inner shell.

[0025] In one embodiment, the first flared structure has a first threaded portion at one end near the inner shell, and the second cylinder has a second threaded portion.

[0026] In one embodiment, the bottom of the cylinder includes a second flared structure, the radial dimension of which gradually increases from one end near the first cylinder to the end away from the first cylinder.

[0027] In one embodiment, the base and the inner shell are integrally injection molded, while the outer shell is independently injection molded.

[0028] In one embodiment, the base is provided with a mounting plate having mounting holes for fasteners to pass through, so as to connect the muffler to the fan frame using fasteners.

[0029] In one embodiment, the mounting hole includes:

[0030] At least one gourd hole is provided for inserting a stud on the mounting surface of the fan frame and for using a sliding muffler to engage the stud with the gourd hole.

[0031] At least one first locking hole is provided for aligning the stud with the second locking hole on the mounting surface after the stud is engaged with the hoist hole, so as to lock the muffler and the fan frame together by locking members that are engaged with the first locking hole and the second locking hole respectively.

[0032] In one embodiment, the anechoic cavity includes a Helmholtz resonant cavity or a quarter-wavelength resonant cavity.

[0033] In one embodiment, a porous material component is provided inside the anechoic cavity. The porous material component is sleeved on the outer periphery of the inner shell and located between any two adjacent acoustic cavity walls.

[0034] In one embodiment, there are at least two acoustic cavity walls, all of which are spaced apart along the axial direction of the inner shell, and through holes are provided between any two adjacent acoustic cavity walls and between the acoustic cavity wall furthest from the base and the bottom of the cylinder.

[0035] In one embodiment, the through-hole includes:

[0036] The first through hole is located between any two adjacent acoustic cavity walls. The first through hole extends along the first side of the inner shell along the axial direction to the acoustic cavity wall near the first side, so that the acoustic cavity wall near the first side serves as the hole wall of the first through hole on the first side. The hole wall of the first through hole along the second side of the inner shell along the axial direction has a preset distance from the acoustic cavity wall near the second side.

[0037] The second through hole is located between the acoustic cavity wall furthest from the base and the bottom of the cylinder. The second through hole extends along the third side of the inner shell along the axial direction to the end of the inner shell, so that the third side of the second through hole is open. The second through hole has a preset distance between the fourth side of the inner shell along the axial direction and the acoustic cavity wall furthest from the base.

[0038] In one embodiment, the end of the outer casing furthest from the bottom of the cylinder is connected to the acoustic cavity wall closest to the base.

[0039] In one embodiment, when determining the size parameters of the muffler, the target frequency of the noise to be absorbed by the muffler cavity is obtained; and the frequency correction coefficient is determined; the correction frequency is obtained based on the frequency correction coefficient and the target frequency; and the size parameters of the muffler cavity are designed based on the correction frequency.

[0040] In one embodiment, before designing the size parameters of the silencer cavity based on the correction frequency, the method further includes:

[0041] To obtain the target amplitude of noise elimination for the silencing cavity;

[0042] Obtain the target bandwidth for noise absorption by the silencing cavity;

[0043] Based on the correction frequency, the parameters for designing the silencing cavity include:

[0044] The parameters of the silencing cavity are designed based on the correction frequency, frequency correction coefficient, target amplitude, and target bandwidth.

[0045] A muffler assembly includes a fan frame and any of the above-mentioned mufflers, wherein the fan frame is provided with at least one fan, and the muffler corresponds to the fan.

[0046] In one embodiment, the number of mufflers is at least two, and all mufflers are mounted on the same mounting base, which is connected to the fan frame.

[0047] In one embodiment, the base of the muffler is connected to the mounting base, and at least one of the outer shell and inner shell of the muffler is detachably connected to the base.

[0048] A server comprising any of the above-mentioned silencer components.

[0049] The silencer provided in this application has the following beneficial effects:

[0050] The space between the inner and outer shells is divided into a sound-absorbing cavity by utilizing the acoustic cavity wall. A through-hole is created in the inner shell to connect the sound-absorbing cavity to the inner bore of the inner shell. In use, the silencer is installed on the transmission path where noise reduction is needed, for example, on the front side of the fan frame, facing the hard drive. In this way, the noise generated by the fan rotation enters the sound-absorbing cavity through the inner bore of the inner shell and is dissipated. Therefore, this silencer can optimize fan noise and reduce its impact on the performance of the hard drive. Furthermore, by rationally designing the structure and size of the sound-absorbing cavity, it is possible to reduce resonance noise at specific frequencies, thereby solving the problem of resonance between specific frequency noise and internal components of the hard drive, effectively mitigating the impact of noise resonance on hard drive performance.

[0051] The muffler assembly provided in this application includes the aforementioned muffler and has the same beneficial effects as the aforementioned muffler.

[0052] The server provided in this application includes the above-mentioned muffler assembly and has the same beneficial effects as the above-mentioned muffler assembly. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0054] Figure 1 is a schematic diagram of the structure of the inner shell and outer shell of the muffler provided in one embodiment of this application before assembly.

[0055] Figure 2 is a schematic diagram of the outer shell in Figure 1.

[0056] Figure 3 is a schematic diagram of the inner shell in Figure 1.

[0057] Figure 4 is a structural schematic diagram of the base of the muffler provided in another embodiment.

[0058] Figure 5 is a structural schematic diagram from another perspective of Figure 4.

[0059] Figure 6 is a schematic diagram of the assembled structure of the outer shell and inner shell of the muffler provided in another embodiment.

[0060] Figure 7 is an exploded view of a silencer provided in another embodiment.

[0061] Figure 8 is a schematic diagram of the structure after the inner shell and outer shell in Figure 7 are assembled.

[0062] Figure 9 is a schematic diagram of the second flared structure.

[0063] Figure 10 is an exploded view of a porous material component inside the silencing cavity; (the arrows in the figure indicate the installation direction).

[0064] Figure 11 is a schematic diagram of the structure of a muffler assembly provided in an embodiment of this application.

[0065] Figure 12 is an exploded view of a muffler assembly provided in another embodiment of this application.

[0066] Reference numerals: 1-Outer shell; 11-First cylinder; 12-Bottom of cylinder; 121-Second flared structure; 13-Protrusion; 2-Inner shell; 21-Second cylinder; 211-Through hole; 2111-First through hole; 2112-Second through hole; 22-Cavity wall; 221-First acoustic cavity wall; 222-Second acoustic cavity wall; 223-Third acoustic cavity wall; 23-Second threaded part; 3-Base; 31-L-shaped groove; 32-First threaded part; 33-First flared structure; 34-Mounting plate; 35-Mounting hole; 351-Hoop hole; 352-First locking hole; 36-Flange; 4-Fan frame; 41-Mounting surface; 42-Second locking hole; 5-Mounting base; 6-Sealing element; 7-Porous material part. Detailed Implementation

[0067] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0068] The core of this application is to provide a silencer that improves the effectiveness of noise reduction for hard disk drives (HDDs). Another core aspect of this application is to provide a silencer assembly including the aforementioned silencer, which further improves the effectiveness of noise reduction for HDDs. Yet another core aspect of this application is to provide a server including the aforementioned silencer assembly, which further improves the effectiveness of noise reduction for HDDs.

[0069] Please refer to Figures 1, 2, and 3. This application provides a silencer, including an outer shell 1, an inner shell 2, and a base 3. The outer shell 1 includes a first cylindrical body 11 and a hollow cylindrical bottom 12 located at one end of the first cylindrical body 11. The inner shell 2 includes a second cylindrical body 21 and a acoustic cavity wall 22 located on the outer periphery of the second cylindrical body 21. The second cylindrical body 21 has a through hole 211 that penetrates its wall thickness. The base 3 is connected to at least one of the first cylindrical body 11 and the second cylindrical body 21, and the base 3 is located at the end of the silencer away from the cylindrical bottom 12. The inner shell 2 is located inside the outer shell 1, and the end of the outer shell 1 away from the cylindrical bottom 12 is connected to the inner shell 2. The acoustic cavity wall 22 is fitted to the inner wall of the outer shell 1, so that the space between the inner shell 2 and the outer shell 1 forms a silencer cavity.

[0070] In other words, after the outer shell 1 and the inner shell 2 are assembled, the acoustic cavity wall 22 is located in the space between the outer shell 1 and the inner shell 2, and one end of the acoustic cavity wall 22 is located on the outer side wall of the inner shell 2, and the other end is attached to the inner side wall of the outer shell 1. The acoustic cavity wall 22 divides the space between the inner shell 2 and the outer shell 1 into a sound-absorbing cavity. The inner shell 2 is provided with a through hole 211 that penetrates its wall thickness. Therefore, the inner hole of the inner shell 2 and the sound-absorbing cavity can be connected by the through hole 211, so that the noise passing through the inner hole of the inner shell 2 can enter the sound-absorbing cavity through the through hole 211, and noise reduction is achieved by using the sound-absorbing cavity.

[0071] In use, the muffler is installed on the transmission path where noise reduction is needed, for example, on the front side of the fan frame 4, so that the muffler faces the hard drive. In this way, the noise generated by the fan rotation enters the muffler cavity through the inner hole of the inner shell 2 and is consumed. Thus, the muffler can optimize fan noise and reduce the impact of noise on the performance of the hard drive. Moreover, by reasonably designing the structure and size of the muffler cavity, it is possible to reduce resonance noise at specific frequencies. That is, this structure is suitable for reducing noise at specific frequencies of the hard drive, thereby solving the problem of resonance between specific frequency noise and internal components of the hard drive, and effectively solving the impact of noise resonance on hard drive performance.

[0072] It should be noted that this embodiment does not limit the way the base 3 is set, as long as the base 3 can be connected to at least one of the first cylinder 11 and the second cylinder 21.

[0073] Understandably, during use, the muffler is installed on the fan frame 4 of the equipment requiring heat dissipation. During on-site maintenance, the muffler needs to be removed from the fan frame 4. To facilitate the removal of the muffler chamber from the fan frame 4, in some embodiments, the base 3 is detachably connected to one of the first cylinder 11 and the second cylinder 21. That is, in this embodiment, the base 3 is an independent component that connects the fan frame 4 to the main structure of the muffler. By being detachable, the base 3 is connected to the outer shell 1 or the inner shell 2, allowing the main structure of the muffler formed by assembling the outer shell 1 and the inner shell 2 to be disassembled relative to the base 3. Thus, when on-site maintenance requires removing the muffler from the fan frame 4, it is only necessary to remove the outer shell 1 or the inner shell 2 from the base 3, separating the outer shell 1 or the inner shell 2 from the base 3. This separates the assembled component structure of the outer shell 1 and the inner shell 2 from the base 3, enabling the disassembly of the main structure of the muffler, while leaving the base 3 on the fan frame 4, eliminating the need to remove the base 3 each time. This facilitates quick disassembly and assembly of the muffler, and also makes it easy to quickly position the muffler during installation, bringing many conveniences to on-site maintenance; in addition, it ensures that the base 3 maintains compatibility with the original fan frame 4 structure, ensuring ease of installation and equipment compatibility.

[0074] It should be noted that this embodiment does not limit the implementation method of detachably connecting the base 3 to one of the first cylinder 11 and the second cylinder 21, as long as the base 3 can be detachably connected to one of the first cylinder 11 and the second cylinder 21.

[0075] In some embodiments, one of the base 3 and the first cylinder 11 is provided with a first fastening position, and the other is provided with a second fastening position for engaging with the first fastening position. That is, in this embodiment, the base 3 and the outer shell 1 are detachably connected by the fastening connection of the first fastening position and the second fastening position. When it is necessary to disassemble the muffler, it is only necessary to release the fastening relationship between the first fastening position and the second fastening position. This connection method is simple and easy to implement.

[0076] Furthermore, this embodiment does not limit the structure of the first and second fasteners, as long as the first and second fasteners can be separably fastened together.

[0077] Please refer to Figures 4, 5 and 6. In some embodiments, the first fastening position is an L-shaped groove 31 provided on the base 3, and the L-shaped groove 31 has an opening. The second fastening position is a protrusion 13 provided on the outer shell 1. The protrusion 13 enters the L-shaped groove 31 from the opening and is fastened to the L-shaped groove 31 by rotation.

[0078] In other words, in this embodiment, the first and second fasteners form a snap-fit ​​structure. It can be understood that the L-shaped groove 31 includes a first straight groove and a second straight groove that are perpendicularly connected to each other. The first straight groove is defined with an opening at its end away from its connection with the second straight groove, and the end of the second straight groove away from its connection with the first straight groove is closed by the base 3 structure. During installation, the protrusion 13 is slid into the L-shaped groove 31 from the opening, that is, the protrusion 13 is slid into the first straight groove from the opening, and slides along the first straight groove until it reaches the connection point between the first and second straight grooves, that is, the corner of the L-shaped groove 31. Then, by rotating the muffler, the protrusion 13 slides into the second straight groove, achieving a mating connection between the protrusion 13 and the second straight groove, thereby achieving a detachable connection between the outer shell 1 and the base 3. That is, when installing the muffler, it is only necessary to first insert the protrusion 13 into the L-shaped groove 31 along the installation direction, and then rotate the muffler by a certain angle to complete the connection.

[0079] When it is necessary to disassemble the muffler, simply rotate the muffler in the opposite direction to the installation direction so that the protrusion 13 slides along the second straight groove to the connection between the second straight groove and the first straight groove. Then, move the muffler away from the base 3 so that the protrusion 13 moves along the first straight groove and comes out from the opening of the first straight groove, thus disassembling the muffler.

[0080] It should be noted that this embodiment does not limit the number and distribution of the L-shaped grooves 31 and the protrusions 13, as long as the connection between the outer shell 1 and the base 3 can be achieved. In some embodiments, there are two L-shaped grooves 31 and two protrusions 13, with the two L-shaped grooves 31 arranged symmetrically about the center of the base 3 and the two protrusions 13 arranged symmetrically about the center of the outer shell 1.

[0081] In addition, considering the sealing when the base 3 is connected to the outer shell 1, in some embodiments, the base 3 includes at least two flange portions 36 distributed circumferentially along the muffler. The flange portions 36 protrude from one end of the base 3 along the axial direction of the muffler, and each flange portion 36 is provided with an L-shaped groove 31. The protrusion 13 is provided on the outer periphery of the first cylinder 11. The base 3 also includes a sealing member 6 provided in the area surrounded by all the flange portions 36. The sealing member 6 is used to fit and contact with the end face of the first cylinder 11.

[0082] In other words, this embodiment provides a flange 36 at one end of the base 3 near the outer shell 1, and forms an L-shaped groove 31 on the flange 36. This facilitates the machining of the L-shaped groove 31 and allows the protrusion on the outer periphery of the outer shell 1 to connect with the L-shaped groove 31. Furthermore, to improve the sealing between the base 3 and the outer shell 1, this embodiment provides a sealing element 6 between the contact surfaces of the base 3 and the outer shell 1, so that the end face of the first cylinder 11 is in close contact with one side of the sealing element 6. This improves the tightness of the contact between the outer shell 1 and the base 3, ensuring the sealing performance between the base 3 and the outer shell 1 and improving the noise reduction effect. It should be noted that this embodiment does not limit the material of the sealing element 6; in some embodiments, the sealing element 6 is a rubber ring.

[0083] Alternatively, the detachable connection between the base 3 and one of the first cylindrical body 11 and the second cylindrical body 21 can also be achieved in other ways. For example, referring to Figures 7 and 8, in some embodiments, one of the base 3 and the inner shell 2 is provided with a first threaded portion 32, and the other is provided with a second threaded portion 23 for threaded connection with the first threaded portion 32. That is, in this embodiment, the detachable connection between the base 3 and the inner shell 2 is achieved through the threaded connection of the first threaded portion 32 and the second threaded portion 23. During installation, the assembly of the inner shell 2 and the outer shell 1 is simply tightened by screwing the first threaded portion 32 and the second threaded portion 23. During disassembly, the assembly of the inner shell 2 and the outer shell 1 is unscrewed in the opposite direction to the installation direction. It is understood that one of the first threaded portion 32 and the second threaded portion 23 is an internal thread, and the other is an external thread. The connection between the base 3 and the inner shell 2 is achieved by the engagement of the internal and external threads.

[0084] Furthermore, to reduce turbulence inside the fan and lower aerodynamic noise, please continue referring to Figure 7. In some embodiments, the base 3 is provided with a first flared structure 33, the radial dimension of which gradually increases from the end near the inner shell 2 to the end away from the inner shell 2. It is understood that after the muffler base 3 is installed on the fan frame 4, the first flared structure 33 is located at the fan inlet. This helps reduce turbulence inside the fan, lowers the overall aerodynamic noise of the fan, thereby optimizing airflow efficiency and improving the fan's heat dissipation performance and the overall system efficiency. Moreover, in this embodiment, the first flared structure 33 is integrated into the base 3, making the first flared structure 33 and the base 3 a single, integrated structure, resulting in a compact and aesthetically pleasing design.

[0085] It should be noted that, when the base 3 is provided with a first flared opening structure 33, please continue to refer to Figure 7. In some embodiments, the first flared opening structure 33 has a first threaded portion 32 at the end near the inner shell 2, and the inner shell 2 has a second threaded portion 23. For example, the first flared opening structure 33 has an external thread at the end near the inner shell 2, and the inner shell 2 has an internal thread. That is, in this embodiment, the first threaded portion 32 is located at the outer edge of the small-diameter end of the first flared opening, which facilitates the connection between the base 3 and the inner shell 2.

[0086] Additionally, referring to Figure 9, in some embodiments, the bottom 12 of the cylinder includes a second flared structure 121, the radial dimension of which gradually increases from the end near the outer shell 1 to the end away from the outer shell 1. It is understood that the second flared structure 121 has a certain airflow guiding effect, exhibiting further noise reduction in practical applications.

[0087] Of course, in other embodiments, the base 3 can also be configured such that the base 3 and the inner shell 2 are integrally injection molded, while the outer shell 1 is independently injection molded. That is, the base 3 is part of the inner shell 2's own structure. Thus, the muffler includes two relatively independent structural components: the outer shell 1 and the inner shell 2. During processing, the inner shell 2 and the outer shell 1 are independently injection molded, and the acoustic cavity wall 22 and the base 3 are integrally molded with the inner shell 2, ensuring structural integrity. During assembly, it is only necessary to assemble and connect the outer shell 1 and the inner shell 2 together, which is convenient. The separate injection molding of the outer shell 1 and the inner shell 2, as well as the above-mentioned connection method between the outer shell 1 and the inner shell 2, can ensure the structural reliability requirements during transportation and handling.

[0088] Furthermore, the above embodiments do not limit the connection structure between the base 3 and the fan frame 4, as long as the connection between the base 3 and the fan frame 4 can be achieved. In some embodiments, the base 3 is provided with a mounting plate 34, and the mounting plate 34 is provided with mounting holes 35 for fasteners to pass through, so as to connect the muffler to the fan frame 4 using fasteners. It can be understood that during installation, the mounting plate 34 of the base 3 is in contact with the mounting surface 41 of the fan frame 4, and then the muffler is connected to the fan frame 4 by fasteners passing through the mounting holes 35, thereby achieving the installation and fixation of the muffler on the fan frame 4.

[0089] It should be noted that the structure of the mounting hole 35 is not limited in this embodiment. For example, referring to Figures 4 and 5, the mounting hole 35 can be a locking hole for fasteners to pass through. This locking hole is aligned with the fixing hole on the mounting surface 41 of the fan frame 4. Fasteners are sequentially inserted into the locking hole and the fixing hole to lock the muffler to the fan frame 4. In some embodiments, the locking hole can be a through hole, the fixing hole can be a threaded hole, and the fastener can be a screw. This solution is particularly suitable for cases where the base 3 is detachably connected to either the outer shell 1 or the inner shell 2.

[0090] Please refer to Figures 1, 3, 7, and 10. In some embodiments, the mounting hole 35 includes at least one gourd hole 351 and at least one first locking hole 352. The gourd hole 351 is used for inserting a stud on the mounting surface 41 of the fan frame 4 and for the stud to engage with the gourd hole 351 by means of a sliding muffler. The first locking hole 352 is used to align with the second locking hole 42 on the mounting surface 41 after the stud is engaged with the gourd hole 351, so as to lock the muffler to the fan frame 4 by means of locking members that engage with the first locking hole 352 and the second locking hole 42 respectively.

[0091] It is understood that the gourd hole 351 includes a large hole and a small hole that are interconnected. During installation, the large hole of the gourd hole 351 is aligned with the stud on the mounting surface 41 of the fan frame 4 and inserted. Then, the muffler is slid, causing the small hole of the gourd hole 351 to engage with the stud on the mounting surface 41 of the fan frame 4, thus achieving the engagement and limiting of the gourd hole 351 with the stud on the mounting surface 41 of the fan frame 4. When the gourd hole 351 is engaged with the stud on the mounting surface 41 of the fan frame 4, the first locking hole 352 of the base 3 is aligned with the second locking hole 42 on the mounting surface 41 of the fan frame 4. At this time, the locking member is passed through the first locking hole 352 and the second locking hole 42 in sequence to achieve the engagement and connection of the locking member with the first locking hole 352 and the second locking hole 42, thereby fixing the base 3 to the mounting surface 41 of the fan frame 4. This installation structure not only fixes the muffler but also saves installation space, and is convenient, time-saving, labor-saving, and easy to operate.

[0092] It should be noted that this embodiment does not limit the number or distribution of the gourd hole 351 and the first locking hole 352, as long as reliable positioning and connection between the base 3 and the fan frame 4 can be achieved. In some embodiments, there is one first locking hole 352 and three gourd holes 351. The first locking hole 352 and the three gourd holes 351 are arranged in a quadrilateral shape. The mounting plate 34 is rectangular in shape, and the first locking hole 352 and the three gourd holes 351 are respectively located at the four corners of the mounting plate 34.

[0093] Of course, in other embodiments, the base 3 can also be connected to the fan frame 4 by other installation methods, such as bonding, welding or other methods to the mounting plate 34 of the base 3 and the mounting surface 41 of the fan frame 4.

[0094] Furthermore, the embodiments of this application do not limit the shape and structure of the silencing cavity.

[0095] In some embodiments, the anechoic cavity includes a Helmholtz resonator or a quarter-wavelength resonator. It should be noted that the shape and sound absorption principle of the Helmholtz resonator and quarter-wavelength resonator are described in relevant technical documents and will not be repeated here.

[0096] Furthermore, in some embodiments, a porous material component 7 is provided inside the silencing cavity. The porous material component 7 is sleeved on the outer periphery of the inner shell 2 and located between any two adjacent acoustic cavity walls 22.

[0097] In other words, this embodiment uses a porous material component 7 within the anechoic cavity, making the anechoic cavity a resistive cavity filled with the porous material component. The combined effect of the porous material component 7 and the anechoic cavity achieves noise reduction. This technical solution is particularly suitable for target frequencies with a wide and flat frequency spectrum.

[0098] It should be noted that the material of the porous material component 7 is not limited in this embodiment, as long as the porous material component 7 has a good sound absorption effect to meet the noise reduction requirements.

[0099] In addition, it should be noted that the above embodiments do not limit the number of acoustic cavity walls 22. The number of acoustic cavity walls 22 can be one or at least two. The more acoustic cavity walls 22 there are, the more sound-absorbing cavities are formed, and the better the noise reduction effect.

[0100] Please refer to Figures 1 and 3. In some embodiments, there are at least two acoustic cavity walls 22. All acoustic cavity walls 22 are spaced apart along the axial direction of the inner shell 2. Through holes 211 are provided between any two adjacent acoustic cavity walls 22 and between the acoustic cavity wall 22 furthest from the base 3 and the bottom of the cylinder 12.

[0101] In other words, this embodiment provides two or more acoustic cavity walls 22 to form at least two silencing cavities. For example, there are three acoustic cavity walls 22: a first acoustic cavity wall 221, a second acoustic cavity wall 222, and a third acoustic cavity wall 223. These three walls are arranged sequentially, with the first acoustic cavity wall 221 close to the base 3. A first silencing cavity is formed between the first acoustic cavity wall 221 and the second acoustic cavity wall 222. A second silencing cavity is formed between the second acoustic cavity wall 222 and the third acoustic cavity wall 223. A third silencing cavity is formed between the third acoustic cavity wall 223 and the bottom 12 of the outer shell 1. It is understood that through holes 211 are provided between any two adjacent acoustic cavity walls 22 and between the acoustic cavity wall 22 furthest from the base 3 and the bottom 12, to ensure that each silencing cavity communicates with the inner hole of the inner shell 2.

[0102] It should be noted that the method of setting the through hole 211 is not limited in this embodiment, as long as the through hole 211 can connect the sound-absorbing cavity with the inner hole of the inner shell 2.

[0103] Please continue to refer to Figures 1 and 3. In some embodiments, the through hole 211 includes a first through hole 2111 and a second through hole 2112. The first through hole 2111 is located between any two adjacent acoustic cavity walls 22. The first through hole 2111 extends along the first side of the axial direction of the inner shell 2 to the acoustic cavity wall 22 near the first side, so that the acoustic cavity wall 22 near the first side serves as the hole wall of the first through hole 2111. There is a preset distance between the hole wall of the first through hole 2111 on the second side of the axial direction of the inner shell 2 and the acoustic cavity wall 22 near the second side. The second through hole 2112 is located between the acoustic cavity wall 22 furthest from the base 3 and the bottom of the cylinder 12. The second through hole 2112 extends along the third side of the axial direction of the inner shell 2 to the end of the inner shell 2, so that the third side of the second through hole 2112 is open. There is a preset distance between the fourth side of the second through hole 2112 along the axial direction of the inner shell 2 and the acoustic cavity wall 22 furthest from the base 3.

[0104] In other words, in this embodiment, the first through hole 2111 located between any two adjacent acoustic cavity walls 22 is not located in the middle between the two acoustic cavity walls 22, but rather the first through hole 2111 is offset closer to one of the acoustic cavity walls 22, making one of the acoustic cavity walls 22 the hole wall of the first through hole 2111; similarly, the second through hole 2112 located between the acoustic cavity wall 22 furthest from the base 3 and the bottom of the cylinder 12 is not located in the middle between the acoustic cavity wall 22 furthest from the base 3 and the bottom of the cylinder 12, but rather the second through hole 2112 is offset at one end of the inner shell 2 near the bottom of the cylinder 12, thus making the second through hole 2112 an open structure. This facilitates the formation of the first through hole 2111 and the second through hole 2112.

[0105] It should be noted that this embodiment does not limit the number of through holes 211 corresponding to a single silencing cavity. For example, one through hole 211 can be opened in the inner shell 2 at the position corresponding to a single silencing cavity, or at least two through holes 211 can be opened.

[0106] It should be noted that the shape of the through hole 211 is not limited in this embodiment of the application. The shape of the through hole 211 can be circular, square, rectangular or other shapes.

[0107] Furthermore, the embodiments of this application do not limit the shape of the cross-section of the first cylinder 11 and the second cylinder 21. For example, the cross-sections of the first cylinder 11 and the second cylinder 21 can be circular, hexagonal, or other geometric shapes, respectively.

[0108] Considering the ease of connection between the outer shell 1 and the inner shell 2, in some embodiments, the end of the outer shell 1 furthest from the bottom 12 is connected to the acoustic cavity wall 22 closest to the base 3. That is, during installation, the end of the inner shell 2 furthest from the base 3 is inserted into the outer shell 1 from the end of the outer shell 1 furthest from the bottom 12. Then, the end of the outer shell 1 furthest from the bottom 12 is connected to the acoustic cavity wall 22 closest to the base 3. For example, welding or bonding of the acoustic cavity wall 22 to the end of the outer shell 1 furthest from the bottom 12 is completed at the edge of the acoustic cavity wall 22 closest to the base 3, thereby connecting the outer shell 1 and the inner shell 2 together, assembling them into a single unit. It should be noted that, except for the connection between the acoustic cavity wall 22 closest to the base 3 and the end of the outer shell 1 furthest from the bottom 12, the contact surfaces of the other acoustic cavity walls 22 and the inner sidewall of the outer shell 1 maintain zero-gap contact. This assembly and connection method of the silencer has been verified through simulation tests, and the silencer with this structure can meet the structural reliability requirements and will not be at risk of breakage under a 50G square wave impact.

[0109] Additionally, it should be noted that the above embodiments do not limit the design method of the size parameters of the silencing cavity. For example, when the silencing cavity is a Helmholtz resonant cavity, the size parameters of the silencing cavity can be determined according to the conventional design method of the Helmholtz resonant cavity; when the silencing cavity is a quarter-wavelength resonant cavity, the size parameters of the silencing cavity can be determined according to the conventional design method of the quarter-wavelength resonant cavity.

[0110] However, when determining the size parameters of the silencing cavity using the conventional design method of Helmholtz resonators, there is a certain deviation between the actual noise reduction capability of the designed muffler and the target frequency that needs to be eliminated during the design. Therefore, in order to improve the accuracy of the noise reduction of the silencing cavity, in some embodiments, when determining the size parameters of the muffler, the target frequency of the noise to be absorbed by the silencing cavity is obtained; and the frequency correction coefficient is determined; based on the frequency correction coefficient and the target frequency, the correction frequency is obtained; and based on the correction frequency, the size parameters of the silencing cavity are designed.

[0111] In other words, this embodiment uses a frequency correction coefficient to correct the target frequency of the noise absorbed by the silencing cavity. Then, the silencing cavity is designed using the corrected frequency, so that the frequency of the noise that the designed silencing cavity can actually eliminate is consistent with the target frequency. That is, through this silencing body design method, the silencing cavity can correspond to the target frequency to be eliminated, thereby achieving a better noise reduction effect.

[0112] It should be noted that this embodiment does not limit the method for determining the frequency correction coefficient, which can be obtained by those skilled in the art through repeated experiments. The frequency correction coefficient is related to the distance from the through hole 211 of the silencing cavity to the end of the muffler along the axial direction, the number of silencing cavities, and the arrangement of the silencing cavities. In some embodiments, the value of the frequency correction coefficient ranges from 1.2 to 3.

[0113] Furthermore, it is understandable that in practical use, it is desirable for the silencer to have a good noise reduction effect across a certain frequency range, rather than just working on a single target frequency. Moreover, there are usually certain requirements regarding the target amplitude of the noise that the silencer can eliminate. Therefore, in some embodiments, before designing the size parameters of the silencer cavity based on the correction frequency, the following steps are also included:

[0114] To obtain the target amplitude of noise elimination for the silencing cavity;

[0115] Obtain the target bandwidth for noise absorption by the silencing cavity;

[0116] Based on the correction frequency, the dimensions of the silencing cavity are designed, including:

[0117] The dimensions of the silencing cavity are designed based on the correction frequency, frequency correction coefficient, target amplitude, and target bandwidth.

[0118] In other words, this embodiment considers the target amplitude and target bandwidth as design objectives when designing the size parameters of the silencing cavity. Simultaneously, it uses a correction frequency to correct the target amplitude and target bandwidth, and combines this with the correction frequency obtained in the previous embodiment to jointly determine the size parameters of the silencing cavity. It can be seen that the silencing cavity obtained by this embodiment is applicable to specific frequency bands, has a wide range of applications, and strong versatility.

[0119] When designing the dimensional parameters of the silencing cavity, the following two formulas can be used for the design.

[0120] Among them, f p The target frequency of the noise absorbed by a single anechoic chamber is ε, where ε is the frequency correction factor, c is the speed of sound in air, c = 343 m / s, and S p T is the sum of the areas of the through holes 211 corresponding to a single silencing cavity.p V is the thickness of the inner shell 2. r S1 is the volume of a single silencing cavity, S2 is the area of ​​the cross-section (the section perpendicular to the axis of the inner shell 2) on the side of the inner shell 2 away from the outer shell 1, A is the target amplitude of noise to be eliminated by the silencing cavity, and ΔF is the target bandwidth of the noise absorbed by the silencing cavity.

[0121] Please refer to Figures 10 and 11. In addition to the above-mentioned muffler, this application also provides a muffler assembly that includes the muffler disclosed in the above embodiments. The muffler assembly includes at least one of the above-mentioned mufflers and also includes a fan frame 4. The fan frame 4 is provided with at least one fan, and the muffler corresponds to the fan.

[0122] The key point of this embodiment is that the muffler disclosed in any of the above embodiments has the same beneficial effects as the muffler described above, and will not be repeated here.

[0123] It should be noted that this embodiment does not limit the number of silencers. One silencer can be installed on the fan frame 4. In practical applications, if space permits, one silencer can be installed on the fan frame 4 at the position of each fan to achieve the best noise reduction effect.

[0124] Furthermore, considering the ease of assembling the muffler with the fan frame 4, in some embodiments, the number of mufflers is at least two, and all mufflers are installed on the same mounting base 5, which is connected to the fan frame 4. That is, during assembly, all mufflers can be installed separately on the mounting base 5 first, and then the mounting base 5 is connected to the fan frame 4. In other words, this embodiment achieves the integration of all mufflers by adding the mounting base 5, integrating all mufflers onto the same mounting base 5, enabling simultaneous installation of all mufflers on the fan frame 4, thus facilitating assembly.

[0125] It should be noted that this embodiment does not limit the connection method between the muffler and the mounting base 5, as long as the connection between the muffler and the mounting base 5 can be achieved.

[0126] In some embodiments, the base 3 of the muffler is connected to the mounting base 5, and at least one of the outer shell 1 and the inner shell 2 of the muffler is detachably connected to the base 3. That is, after the muffler is installed on the mounting base 5, when disassembling the muffler, only the inner shell 2 or the outer shell 1 needs to be removed from the base 3, without disassembling the base 3, which facilitates on-site maintenance, etc.

[0127] In addition, this embodiment does not limit the connection method between the mounting base 5 and the fan frame 4, as long as the connection between the mounting base 5 and the fan frame 4 can be achieved.

[0128] In addition to the muffler assembly described above, this application also provides a server that includes the muffler assembly disclosed in the above embodiments. For the structure of other parts of the server, please refer to the relevant technology, which will not be repeated here.

[0129] The key point of this embodiment is that the muffler assembly disclosed in any of the above embodiments has the same beneficial effects as the muffler assembly described above, and will not be repeated here.

[0130] It should also be noted that, in this specification, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0131] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0132] The silencer, silencer assembly, and server provided in this application have been described in detail above. Embodiments have been used to illustrate the principles and implementation methods of this application. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A silencer, characterized in that, include: The outer shell (1) includes a first cylindrical body (11) and a hollow cylindrical bottom (12) disposed at one end of the first cylindrical body (11); The inner shell (2) includes a second cylindrical body (21) and a acoustic cavity wall (22) provided on the outer periphery of the second cylindrical body (21). The second cylindrical body (21) is provided with a through hole (211) that penetrates its wall thickness. The base (3), connected to at least one of the first cylinder (11) and the second cylinder (21), is located at the end of the silencer away from the bottom (12); The inner shell (2) is located inside the outer shell (1), and the end of the outer shell (1) away from the bottom of the cylinder (12) is connected to the inner shell (2). The acoustic cavity wall (22) is attached to the inner wall of the outer shell (1), so that the space between the inner shell (2) and the outer shell (1) forms a sound-absorbing cavity.

2. The silencer according to claim 1, characterized in that, The base (3) is detachably connected to one of the first cylinder (11) and the second cylinder (21).

3. The silencer according to claim 2, characterized in that, One of the base (3) and the first cylinder (11) is provided with a first fastening position, and the other is provided with a second fastening position for engaging with the first fastening position.

4. The silencer according to claim 3, characterized in that, The first fastening position is an L-shaped groove (31) provided on the base (3), and the L-shaped groove (31) has an opening. The second fastening position is a protrusion (13) provided on the first cylinder (11). The protrusion (13) enters the L-shaped groove (31) from the opening and is fastened to the L-shaped groove (31) by rotation.

5. The silencer according to claim 4, characterized in that, The base (3) includes at least two flange portions (36) spaced apart circumferentially along the muffler. The flange portions (36) protrude from one end of the base (3) along the axial direction of the muffler. Each flange portion (36) is provided with the L-shaped groove (31). The protrusion (13) is provided on the outer periphery of the first cylindrical body (11); The base (3) also includes a seal (6) disposed in the area enclosed by all the flange portions (36), the seal (6) being used to fit and contact the end face of the first cylinder (11).

6. The silencer according to claim 2, characterized in that, One of the base (3) and the second cylinder (21) is provided with a first threaded portion (32), and the other is provided with a second threaded portion (23) for threaded connection with the first threaded portion (32).

7. The silencer according to claim 6, characterized in that, The base (3) is provided with a first flared structure (33), the radial dimension of which gradually increases from the end near the inner shell (2) to the end away from the inner shell (2).

8. The muffler according to claim 7, characterized in that, The first flared structure (33) has a first threaded portion (32) at one end near the inner shell (2), and the second cylinder (21) has a second threaded portion (23).

9. The muffler according to any one of claims 1-8, characterized in that, The bottom of the cylinder (12) includes a second flared structure (121), the radial dimension of which gradually increases from one end near the first cylinder (11) to the other end away from the first cylinder (11).

10. The silencer according to claim 1, characterized in that, The base (3) and the inner shell (2) are integrally injection molded, while the outer shell (1) is independently injection molded.

11. The muffler according to any one of claims 1-8, characterized in that, The base (3) is provided with a mounting plate (34), the mounting plate (34) is provided with mounting holes (35), the mounting holes (35) are used for fasteners to pass through, so as to connect the muffler to the fan frame (4) using the fasteners.

12. The silencer according to claim 11, characterized in that, The mounting hole (35) includes: At least one gourd hole (351) is provided for inserting a stud on the mounting surface (41) of the fan frame (4) and for sliding the muffler to make the stud engage with the gourd hole (351); At least one first locking hole (352) is used to align with a second locking hole (42) on the mounting surface (41) after the stud is engaged with the gourd hole (351) to lock the muffler to the fan frame (4) by locking members that are engaged with the first locking hole (352) and the second locking hole (42) respectively.

13. The muffler according to any one of claims 1-8, characterized in that, The silencing cavity includes a Helmholtz resonant cavity or a quarter-wavelength resonant cavity.

14. The muffler according to any one of claims 1-8, characterized in that, The silencing cavity is provided with a porous material component (7), which is sleeved on the outer periphery of the inner shell (2) and located between any two adjacent acoustic cavity walls (22).

15. The muffler according to any one of claims 1-8, characterized in that, The number of acoustic cavity walls (22) is at least two, and all the acoustic cavity walls (22) are spaced apart along the axial direction of the inner shell (2). The through holes (211) are provided between any two adjacent acoustic cavity walls (22) and between the acoustic cavity wall (22) furthest from the base (3) and the bottom of the cylinder (12).

16. The silencer according to claim 15, characterized in that, The through hole (211) includes: A first through hole (2111) is provided between any two adjacent acoustic cavity walls (22). The first through hole (2111) extends along the first side of the axial direction of the inner shell (2) to the acoustic cavity wall (22) near the first side, so that the acoustic cavity wall (22) near the first side serves as the hole wall of the first side of the first through hole (2111). There is a preset distance between the hole wall of the first through hole (2111) along the second side of the axial direction of the inner shell (2) and the acoustic cavity wall (22) near the second side. The second through hole (2112) is located between the acoustic cavity wall (22) furthest from the base (3) and the bottom of the cylinder (12). The second through hole (2112) extends along the third side of the axial direction of the inner shell (2) to the end of the inner shell (2), so that the third side of the second through hole (2112) is open. The second through hole (2112) has a predetermined distance between the fourth side of the axial direction of the inner shell (2) and the acoustic cavity wall (22) furthest from the base (3).

17. The silencer according to claim 15, characterized in that, The end of the outer shell (1) away from the bottom of the cylinder (12) is connected to the acoustic cavity wall (22) closest to the base (3).

18. The muffler according to any one of claims 1-8, characterized in that, When determining the size parameters of the muffler, the target frequency of the noise to be absorbed by the muffler cavity is obtained; and the frequency correction coefficient is determined; the correction frequency is obtained based on the frequency correction coefficient and the target frequency; and the size parameters of the muffler cavity are designed based on the correction frequency.

19. The silencer according to claim 18, characterized in that, Before designing the dimensional parameters of the silencing cavity based on the correction frequency, the process further includes: Obtain the target amplitude of noise reduction required by the noise reduction cavity; Obtain the target bandwidth of the noise absorbed by the silencing cavity; Based on the correction frequency, the dimensional parameters of the silencing cavity are designed, including: The size parameters of the silencing cavity are designed based on the correction frequency, the frequency correction coefficient, the target amplitude, and the target bandwidth.

20. A muffler assembly, characterized in that, It includes a fan frame (4) and at least one muffler, the muffler being the muffler according to any one of claims 1-19, the fan frame (4) being provided with at least one fan, and the muffler corresponding to the fan.

21. The muffler assembly according to claim 20, characterized in that, The number of silencers is at least two, and all the silencers are installed on the same mounting base (5), which is connected to the fan frame (4).

22. The muffler assembly according to claim 21, characterized in that, The base (3) of the muffler is connected to the mounting base (5), and at least one of the outer shell (1) and inner shell (2) of the muffler is detachably connected to the base (3).

23. A server, characterized in that, Includes the muffler assembly as described in any one of claims 20-22.

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