Muffler, muffler assembly and server

Abstract

The present invention discloses a muffler, a muffler assembly and a server, which are applied to the technical field of muffler structure, and are used to solve the problem that noise affects the performance of mechanical hard disks. The muffler comprises: an outer shell, comprising a first cylinder and a hollow cylinder bottom arranged at one end of the first cylinder; an inner shell, comprising a second cylinder and a sound cavity wall arranged at the outer periphery of the second cylinder, and the second cylinder is provided with a through hole penetrating its wall thickness; a base, connected to at least one of the first cylinder and the second cylinder, and located at the end of the muffler away from the cylinder bottom; the inner shell is arranged in the outer shell, and the end of the outer shell away from the cylinder bottom is connected to the inner shell, and the sound cavity wall is fitted with the inner wall of the outer shell, so that the space between the inner shell and the outer shell forms a muffler. The noise generated by the rotation of the fan enters the muffler cavity through the inner hole of the inner shell for consumption. The use of the muffler can optimize the fan noise and reduce the influence of the noise on the performance of the mechanical hard disk.

Description

Technical Field

[0001] The present invention relates to the technical field of muffler structures, and more specifically, to a muffler. In addition, the present invention also relates to a muffler assembly including the muffler and a server including the muffler assembly. Background Art

[0002] 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 servers will generate significant heat.

[0003] At present, the heat emitted by electronic devices in the server is mainly removed by fan-driven air flow. However, when the fan rotates at high speed, it will generate noise with multiple frequency components, such as pneumatic noise, electromagnetic noise and vibration noise, etc. These noises not only affect the working environment of the server, but may also have an adverse effect on other precision devices inside the server. In particular, the mechanical hard disk of the server includes precision devices such as magnetic heads, magnetic arms, bearings and motors. These precision devices are extremely sensitive to external vibration and noise, and are easily affected by resonance and affect normal operation, thereby affecting the read and write performance of the mechanical hard disk, and even causing the hard disk to be scrapped prematurely.

[0004] In order to solve the technical problem of the internal noise of the server and the resonance of the hard disk, in the related technology, the noise is reduced by pasting sound-absorbing cotton inside the server chassis or installing waveguide plates at the fan outlet and air inlet. However, these methods are not effective in reducing the noise of mechanical hard disks, especially the resonance noise of specific frequencies of mechanical hard disks.

[0005] Therefore, how to improve the effectiveness of noise reduction for mechanical hard disks is an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0006] In view of this, an object of the present invention is to provide a muffler that can improve the effectiveness of noise reduction for mechanical hard disks.

[0007] Another object of the present invention is to provide a silencer assembly including the above-mentioned silencer, which can improve the effectiveness of noise reduction for mechanical hard disks.

[0008] Another object of the present invention is to provide a server including the above-mentioned silencer assembly, which can improve the effectiveness of noise reduction for mechanical hard disks.

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] A silencer, comprising:

[0011] The outer shell comprises a first cylinder and a hollow cylinder bottom arranged at one end of the first cylinder;

[0012] The inner shell comprises a second cylinder and a sound cavity wall arranged at the outer periphery of the second cylinder, wherein the second cylinder is provided with a through hole penetrating through the wall thickness thereof;

[0013] A base, connected to at least one of the first cylinder and the second cylinder, and located at an end of the muffler away from the cylinder bottom;

[0014] The inner shell is arranged in the outer shell, and one end of the outer shell away from the cylinder bottom is connected to the inner shell, and the sound cavity wall is fitted with the inner wall of the outer shell, so that the space between the inner shell and the outer shell forms a silencer cavity.

[0015] In one aspect, the base is detachably connected to one of the first barrel and the second barrel.

[0016] On the other hand, one of the base and the first cylinder is provided with a first buckle position, and the other is provided with a second buckle position for buckling with the first buckle position.

[0017] On the other hand, the first buckle position is an L-shaped groove provided on the base, and the L-shaped groove has an opening, and the second buckle 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.

[0018] On the other hand, the base includes at least two flange portions spaced apart along the circumference of the muffler, the flange portion protrudes from one end of the base along the axial direction of the muffler, and each of the flange portions is provided with the L-shaped groove;

[0019] The protrusion is arranged on the outer periphery of the first cylinder;

[0020] The base further includes a sealing member arranged in an area surrounded by all the flange portions, and the sealing member is used for being in close contact with an end surface of the first cylinder.

[0021] On the other hand, 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.

[0022] On the other hand, the base is provided with a first bell-mouth structure, and the radial dimension of the first bell-mouth structure gradually increases from an end close to the inner shell to an end far away from the inner shell.

[0023] On the other hand, the first bell-mouth structure is provided with the first threaded portion at one end close to the inner shell, and the second cylinder is provided with the second threaded portion.

[0024] On the other hand, the cylinder bottom includes a second bell-mouth structure, and the radial dimension of the second bell-mouth structure gradually increases from an end close to the first cylinder to an end away from the first cylinder.

[0025] On the other hand, the base and the inner shell are integrally injection-molded, and the outer shell is independently injection-molded.

[0026] On the other hand, the base is provided with a mounting plate, and the mounting plate is provided with a mounting hole, and the mounting hole is used for fasteners to pass through, so as to connect the muffler to the fan frame by using the fasteners.

[0027] On the other hand, the mounting hole comprises:

[0028] At least one calabash hole, for inserting a stud on the mounting surface of the fan frame and for sliding the muffler so that the stud fits into the calabash hole;

[0029] At least one first locking hole is used to align with the second locking hole on the mounting surface when the stud is in place with the gourd hole, so as to lock the muffler and the fan frame through locking members respectively connected to the first locking hole and the second locking hole.

[0030] In another aspect, the anechoic cavity comprises a Helmholtz resonant cavity or a quarter-wavelength resonant cavity.

[0031] On the other hand, a porous material piece is provided in the muffler cavity, and the porous material piece is sleeved on the outer periphery of the inner shell and is located between any two adjacent sound cavity walls.

[0032] On the other hand, the number of the sound cavity walls is at least two, all of the sound cavity walls are spaced apart along the axial direction of the inner shell, and the through hole is provided between any two adjacent sound cavity walls and between the sound cavity wall farthest from the base and the cylinder bottom.

[0033] In another aspect, the through hole comprises:

[0034] A first through hole is provided between any two adjacent sound cavity walls, the first through hole extends along a first side of the axial direction of the inner shell to the sound cavity wall close to the first side, so that the sound cavity wall close to the first side serves as a hole wall on the first side of the first through hole, and a preset distance exists between a hole wall on a second side of the axial direction of the first through hole and the sound cavity wall close to the second side;

[0035] The second through hole is arranged between the sound cavity wall farthest from the base and the bottom of the cylinder, and the second through hole extends along the third axial side of the inner shell to the end of the inner shell, so that the third side of the second through hole is open, and the second through hole has a preset distance from the fourth axial side of the inner shell and the sound cavity wall farthest from the base.

[0036] On the other hand, one end of the shell away from the cylinder bottom is connected to the sound cavity wall closest to the base.

[0037] On the other hand, when determining the size parameters of the silencer, the target frequency of the noise that the silencer cavity is used to absorb is obtained; and a frequency correction coefficient is determined; a correction frequency is obtained based on the frequency correction coefficient and the target frequency; and the size parameters of the silencer cavity are designed based on the correction frequency.

[0038] On the other hand, before designing the size parameters of the silencing cavity according to the correction frequency, the method further includes:

[0039] Obtaining a target amplitude of noise that needs to be eliminated by the silencing chamber;

[0040] Obtaining a target bandwidth of noise that the silencing cavity is used to absorb;

[0041] According to the correction frequency, the parameters of the silencing cavity are designed, including:

[0042] The parameters of the silencing cavity are designed according to the correction frequency, the frequency correction coefficient, the target amplitude and the target bandwidth.

[0043] A muffler assembly comprises a fan frame and any one of the above-mentioned mufflers, wherein the fan frame is provided with at least one fan, and the muffler corresponds to the fan.

[0044] On the other hand, the number of the silencers is at least two, and all the silencers are installed on the same mounting base, and the mounting base is connected to the fan frame.

[0045] On the other hand, the base of the silencer is connected to the mounting seat, and at least one of the outer shell and the inner shell of the silencer is detachably connected to the base.

[0046] A server comprises any one of the above-mentioned silencer components.

[0047] The muffler provided by the present invention has the following beneficial effects:

[0048] The space between the inner shell and the outer shell is divided into a silencer chamber by using the sound cavity wall, and the silencer chamber is connected to the inner hole of the inner shell by opening a through hole on the inner shell. When in use, the silencer is installed on the transmission path where noise reduction is required, for example, installed on the front side of the fan frame so that the silencer faces the mechanical hard disk. In this way, the noise generated by the rotation of the fan enters the silencer chamber through the inner hole of the inner shell for consumption, so that the silencer can be used to optimize the fan noise and reduce the impact of noise on the performance of the mechanical hard disk; moreover, by reasonably designing the structure and size of the silencer chamber, the resonance noise of a specific frequency can be reduced, thereby solving the problem of specific frequency noise and resonance of internal components of the mechanical hard disk, and effectively solving the impact of noise resonance on the performance of the hard disk.

[0049] The muffler assembly provided by the present invention includes the above-mentioned muffler and has the same beneficial effects as the above-mentioned muffler.

[0050] The server provided by the present invention includes the above-mentioned muffler assembly and has the same beneficial effects as the above-mentioned muffler assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0052] Figure 1 This is a schematic structural diagram of the inner shell and outer shell of the muffler provided by a specific embodiment of the present invention before assembly.

[0053] Figure 2 for Figure 1 Schematic diagram of the structure of the middle shell.

[0054] Figure 3 for Figure 1 Schematic diagram of the structure of the inner shell.

[0055] Figure 4 A schematic structural diagram of a base of a muffler provided in another specific embodiment.

[0056] Figure 5 for Figure 4 A schematic diagram of the structure from another perspective.

[0057] Figure 6 A schematic diagram of the structure of an outer shell and an inner shell of a muffler after being assembled is provided in another specific embodiment.

[0058] Figure 7 An exploded view of a muffler provided in yet another specific embodiment.

[0059] Figure 8 for Figure 7 Schematic diagram of the structure after the inner shell and the outer shell are assembled.

[0060] Fig. 9 Schematic diagram of the second bell-mouth structure.

[0061] Fig.10 This is an exploded view of a porous material piece installed in a silencer cavity; (the arrow in the figure indicates the installation direction).

[0062] Fig.11 A schematic structural diagram of a muffler assembly provided in a specific embodiment of the present invention.

[0063] Fig.12 An exploded view of a muffler assembly provided according to another specific embodiment of the present invention.

[0064] Reference numerals:

[0065] 1-outer shell; 11-first cylinder; 12-cylinder bottom; 121-second bell-mouth structure; 13-raised portion; 2-inner shell; 21-second cylinder; 211-through hole; 2111-first through hole; 2112-second through hole; 22-sound cavity wall; 221-first sound cavity wall; 222-second sound cavity wall; 223-third sound cavity wall; 23-second threaded portion; 3-base; 31-L-shaped groove; 32-first threaded portion; 33-first bell-mouth structure; 34-mounting plate; 35-mounting hole; 351-gourd hole; 352-first locking hole; 36-flange portion; 4-fan frame; 41-mounting surface; 42-second locking hole; 5-mounting seat; 6-seal; 7-porous material piece. DETAILED DESCRIPTION

[0066] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0067] The core of the present invention is to provide a muffler that can improve the effectiveness of noise reduction for mechanical hard disks. Another core of the present invention is to provide a muffler assembly including the above muffler, which can improve the effectiveness of noise reduction for mechanical hard disks. Another core of the present invention is to provide a server including the above muffler assembly, which can improve the effectiveness of noise reduction for mechanical hard disks.

[0068] Please refer to Figure 1 , Figure 2 and Figure 3An embodiment of the present invention provides a silencer, comprising an outer shell 1, an inner shell 2 and a base 3, wherein the outer shell 1 comprises a first cylinder 11 and a hollow cylinder bottom 12 arranged at one end of the first cylinder 11; the inner shell 2 comprises a second cylinder 21 and a sound cavity wall 22 arranged at the outer periphery of the second cylinder 21, and the second cylinder 21 is provided with a through hole 211 penetrating the wall thickness thereof; the base 3 is connected to at least one of the first cylinder 11 and the second cylinder 21, and the base 3 is located at one end of the silencer away from the cylinder bottom 12; the inner shell 2 is arranged in the outer shell 1, and the end of the outer shell 1 away from the cylinder bottom 12 is connected to the inner shell 2, and the sound cavity wall 22 is fitted with 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.

[0069] That is to say, after the outer shell 1 and the inner shell 2 are assembled, the sound cavity wall 22 is located in the space between the outer shell 1 and the inner shell 2, and one end of the sound cavity wall 22 is arranged on the outer wall of the inner shell 2, and the other end is fitted with the inner wall of the outer shell 1. The sound cavity wall 22 divides the space between the inner shell 2 and the outer shell 1 into a silencer cavity. The inner shell 2 is provided with a through hole 211 penetrating the wall thickness thereof. Therefore, the through hole 211 can be used to connect the inner hole of the inner shell 2 and the silencer cavity, so that the noise passing through the inner hole of the inner shell 2 enters the silencer cavity through the through hole 211, and noise reduction is achieved by using the silencer cavity.

[0070] When in use, the silencer is installed on the transmission path that needs noise reduction, for example, installed on the front side of the fan frame 4 so that the silencer faces the mechanical hard disk. In this way, the noise generated by the rotation of the fan enters the silencer chamber through the inner hole of the inner shell 2 for consumption, so that the silencer can be used to optimize the fan noise and reduce the impact of noise on the performance of the mechanical hard disk; moreover, by reasonably designing the structure and size of the silencer chamber, the resonance noise of a specific frequency can be reduced, that is, the structure is suitable for reducing the noise of a specific frequency of the mechanical hard disk, thereby solving the problem of specific frequency noise and resonance of the internal components of the mechanical hard disk, and effectively solving the impact of noise resonance on the performance of the hard disk.

[0071] It should be noted that the present embodiment does not limit the specific arrangement of the base 3 , as long as the base 3 can be connected to at least one of the first barrel 11 and the second barrel 21 .

[0072] It is understandable that when in use, the muffler is installed on the fan frame 4 of the equipment that needs heat dissipation. When performing on-site maintenance, the muffler needs to be removed from the fan frame 4. In order 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 to say, in this embodiment, the base 3 is an independent component that serves to connect the fan frame 4 with the muffler main structure. The base 3 is connected to the outer shell 1 or the inner shell 2 in a detachable manner, so that the muffler main structure formed after the outer shell 1 and the inner shell 2 are assembled can be disassembled relative to the base 3. In this way, when the muffler needs to be removed from the fan frame 4 for on-site maintenance, it is only necessary to remove the outer shell 1 or the inner shell 2 from the base 3, so that the outer shell 1 or the inner shell 2 is separated from the base 3, so that the assembly structure assembled with the outer shell 1 and the inner shell 2 can be separated from the base 3, and the muffler main structure can be disassembled, and the base 3 is retained on the fan frame 4, and the base 3 does not need to be disassembled every time. This facilitates quick disassembly and assembly of the muffler, and quick installation and positioning of the muffler during installation, bringing many conveniences to on-site maintenance; in addition, the base 3 maintains compatibility with the original fan frame 4 structure, ensuring installation convenience and equipment compatibility.

[0073] It should be noted that the present embodiment does not limit the specific implementation method of the detachable connection between the base 3 and one of the first barrel 11 and the second barrel 21 , as long as the base 3 can be detachably connected to one of the first barrel 11 and the second barrel 21 .

[0074] In some embodiments, one of the base 3 and the first cylinder 11 is provided with a first buckle position, and the other is provided with a second buckle position for buckling with the first buckle position. That is to say, in this embodiment, the base 3 and the housing 1 are detachably connected by the buckling connection of the first buckle position and the second buckle position. When the muffler needs to be disassembled, it is only necessary to release the buckling relationship between the first buckle position and the second buckle position. This connection method is simple and easy to implement.

[0075] Furthermore, the present embodiment does not limit the specific structures of the first buckle position and the second buckle position, as long as the first buckle position and the second buckle position can be detachably buckled.

[0076] Please refer to Figure 4 , Figure 5 and Figure 6 In some embodiments, the first buckle position is an L-shaped groove 31 provided on the base 3, and the L-shaped groove 31 has an opening, and the second buckle position is a protrusion 13 provided on the shell 1, and the protrusion 13 enters the L-shaped groove 31 from the opening and engages with the L-shaped groove 31 by rotation.

[0077] That is to say, in this embodiment, the first buckle position and the second buckle position form a screw-on structure. It can be understood that the L-shaped groove 31 includes a first straight groove and a second straight groove that are vertically connected to each other, and it is defined that an opening is provided at one end of the first straight groove away from the connection between it and the second straight groove, and the end of the second straight groove away from the connection between it and the first straight groove is closed by the base 3 structure. When installing, the protrusion 13 is slid into the L-shaped groove 31 from the opening of the L-shaped groove 31, that is, the protrusion 13 is slid into the first straight groove from the opening of the first straight groove, so that the protrusion 13 slides along the first straight groove until the connection between the first straight groove and the second straight groove, that is, the corner of the L-shaped groove 31, and then, by rotating the muffler, the protrusion 13 slides into the second straight groove, realizing the mating connection between the protrusion 13 and the second straight groove, thereby realizing the detachable connection between the housing 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.

[0078] When the silencer needs to be disassembled, it is only necessary to rotate the silencer in the direction opposite to the installation direction so that the protrusion 13 slides along the second straight groove to the connection point between the second straight groove and the first straight groove, and then move the silencer away from the base 3 so that the protrusion 13 moves along the first straight groove and comes out of the opening of the first straight groove, thereby realizing the disassembly of the silencer.

[0079] It should be noted that the present embodiment does not limit the specific number and distribution of the L-shaped grooves 31 and the protrusions 13, as long as the connection between the housing 1 and the base 3 can be achieved. In some embodiments, the number of the L-shaped grooves 31 and the protrusions 13 are two, the two L-shaped grooves 31 are symmetrically arranged about the center of the base 3, and the two protrusions 13 are symmetrically arranged about the center of the housing 1.

[0080] In addition, considering the sealing performance when the base 3 is connected to the outer shell 1, in some embodiments, the base 3 includes at least two flange portions 36 spaced apart along the circumference of the muffler, and the flange portion 36 protrudes 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 raised portion 13 is provided on the outer periphery of the first cylinder 11; the base 3 also includes a seal 6 provided in the area surrounded by all flange portions 36, and the seal 6 is used to fit and contact with the end surface of the first cylinder 11.

[0081] That is to say, in this embodiment, a flange portion 36 is provided at one end of the base 3 close to the shell 1, and an L-shaped groove 31 is formed on the flange portion 36, so that the processing of the L-shaped groove 31 is convenient, and it is beneficial to connect the raised portion of the outer periphery of the shell 1 with the L-shaped groove 31. Furthermore, in order to improve the sealing between the base 3 and the shell 1, in this embodiment, a seal 6 is provided between the contact surfaces of the base 3 and the shell 1, so that the end surface of the first cylinder 11 is in contact with one side of the seal 6, so as to improve the tightness of the contact between the shell 1 and the base 3, ensure the sealing performance between the base 3 and the shell 1, and improve the noise reduction effect. It should be noted that this embodiment does not limit the specific material of the seal 6. In some embodiments, the seal 6 is a rubber ring.

[0082] In addition, the base 3 and one of the first barrel 11 and the second barrel 21 can be detachably connected in other ways. For example, please refer to Figure 7 and Figure 8 In other 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 to say, in this embodiment, the detachable connection between the base 3 and the inner shell 2 is achieved through the threaded connection between the first threaded portion 32 and the second threaded portion 23. When installing, it is only necessary to tighten the assembly formed by the inner shell 2 and the outer shell 1 through the first threaded portion 32 and the second threaded portion 23. When disassembling, the assembly formed by the inner shell 2 and the outer shell 1 is screwed down in the direction opposite to the installation direction. It can be 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, and the connection between the base 3 and the inner shell 2 is achieved by screwing the internal thread and the external thread together.

[0083] In addition, in order to reduce the turbulence inside the fan and reduce the aerodynamic noise, please continue to refer to Figure 7 In some embodiments, the base 3 is provided with a first bell-mouth structure 33, and the radial dimension of the first bell-mouth structure 33 gradually increases from the end close to the inner shell 2 to the end away from the inner shell 2. It can be understood that after the muffler base 3 is installed on the fan frame 4, the first bell-mouth structure 33 is located at the inlet of the fan, which helps to reduce the turbulence inside the fan and reduce the overall aerodynamic noise of the fan, thereby optimizing the air flow efficiency and helping to improve the heat dissipation performance of the fan and the overall efficiency of the system. Moreover, in this embodiment, the first bell-mouth structure 33 is integrated into the base 3, so that the first bell-mouth structure 33 and the base 3 are designed as an integrated structure, making the structure compact and beautiful.

[0084] It should be noted that, when the base 3 is provided with the first bell mouth structure 33, please continue to refer to Figure 7In some embodiments, the first bell mouth structure 33 is provided with a first threaded portion 32 at one end close to the inner shell 2, and the inner shell 2 is provided with a second threaded portion 23. For example, the first bell mouth structure 33 is provided with an external thread at one end close to the inner shell 2, and the inner shell 2 is provided with an internal thread. That is, in this embodiment, the first threaded portion 32 is provided at the outer edge of the small diameter end of the first bell mouth, so as to facilitate the connection between the base 3 and the inner shell 2.

[0085] Also, please refer to Fig. 9 In some embodiments, the cylinder bottom 12 includes a second bell-mouth structure 121, and the radial dimension of the second bell-mouth structure 121 gradually increases from the end close to the housing 1 to the end far from the housing 1. It can be understood that the second bell-mouth structure 121 has a certain flow-guiding effect, and exhibits a further noise reduction effect in practical applications.

[0086] Of course, in other embodiments, the base 3 may be arranged in such a way that the base 3 is integrally injection molded with the inner shell 2, and the outer shell 1 is independently injection molded. That is, the base 3 belongs to the structure of the inner shell 2 itself. In this way, the muffler includes two relatively independent structural parts, 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 sound cavity wall 22 and the base 3 are respectively integrally molded with the inner shell 2 to ensure 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 for assembly. The separate injection molding of the outer shell 1 and the inner shell 2 and the above-mentioned connection method of the outer shell 1 and the inner shell 2 can ensure the reliability requirements of the structure during transportation and handling.

[0087] In addition, the above-mentioned embodiments do not limit the specific 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 a mounting hole 35, and the mounting hole 35 is used for fasteners to pass through, so as to connect the muffler to the fan frame 4 using the fasteners. It can be understood that during installation, the mounting plate 34 of the base 3 is fitted with the mounting surface 41 of the fan frame 4, and then the muffler is connected to the fan frame 4 by the fasteners penetrating the mounting holes 35, so that the muffler can be installed and fixed on the fan frame 4.

[0088] It should be noted that the present embodiment does not limit the specific structure of the mounting hole 35. For example, please refer to Figure 4 and Figure 5 The mounting hole 35 may be a lock hole for a fastener to pass through, the lock hole is aligned with the fixing hole on the mounting surface 41 of the fan frame 4, and the fastener is sequentially inserted through the lock hole and the fixing hole, so that the muffler and the fan frame 4 can be locked. In some embodiments, the lock hole may be a through hole, the fixing hole may be a threaded hole, and the fastener may be a screw. This solution is particularly suitable for the case where the base 3 is detachably connected to one of the outer shell 1 and the inner shell 2.

[0089] Please refer to Figure 1 , Figure 3 , Figure 7 and Fig.10 In other 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 making the stud and the gourd hole 351 fit in place by sliding the silencer; the first locking hole 352 is used to align with the second locking hole 42 on the mounting surface 41 when the stud and the gourd hole 351 fit in place, so as to lock the silencer and the fan frame 4 through locking members respectively connected to the first locking hole 352 and the second locking hole 42.

[0090] It can be understood that the gourd hole 351 includes a large hole portion and a small hole portion that are interconnected. During installation, the large hole portion 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 so that the small hole portion of the gourd hole 351 cooperates with the stud on the mounting surface 41 of the fan frame 4 to achieve the matching and limiting of the gourd hole 351 and the stud on the mounting surface 41 of the fan frame 4. When the gourd hole 351 and the stud on the mounting surface 41 of the fan frame 4 are matched and limited, 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 sequentially passed through the first locking hole 352 and the second locking hole 42 to achieve the matching connection between the locking member and the first locking hole 352 and the second locking hole 42, so that the base 3 and the mounting surface 41 of the fan frame 4 can be fixed. This installation structure can save installation space while achieving the fixing of the muffler, and is convenient, time-saving, labor-saving, and easy to operate.

[0091] It should be noted that the present embodiment does not limit the specific number and distribution of the gourd hole 351 and the first lock hole 352, as long as the reliable positioning and connection between the base 3 and the fan frame 4 can be achieved. In some embodiments, the number of the first lock hole 352 is one, the number of the gourd hole 351 is three, the first lock hole 352 and the three gourd holes 351 are distributed in a quadrilateral, the shape of the mounting plate 34 is rectangular, and the first lock hole 352 and the three gourd holes 351 are respectively arranged at the four corners of the mounting plate 34.

[0092] Of course, in other embodiments, the base 3 may also be connected to the fan frame 4 by other installation methods, for example, the mounting plate 34 of the base 3 is bonded, welded or connected to the mounting surface 41 of the fan frame 4 by other methods.

[0093] In addition, the embodiment of the present invention does not specifically limit the specific shape and structure of the silencer cavity.

[0094] In some embodiments, the silencing cavity includes a Helmholtz resonant cavity or a quarter-wavelength resonant cavity. It should be noted that the shapes and sound absorption principles of the Helmholtz resonant cavity and the quarter-wavelength resonant cavity can be found in related technologies and will not be described in detail herein.

[0095] Furthermore, in some embodiments, a porous material piece 7 is provided in the silencing cavity. The porous material piece 7 is sleeved on the outer periphery of the inner shell 2 and is located between any two adjacent sound cavity walls 22 .

[0096] That is to say, in this embodiment, by arranging the porous material piece 7 in the silencing cavity, the silencing cavity becomes a resistive cavity filled with the porous material piece, so that the porous material piece 7 and the silencing cavity work together to achieve the effect of silencing and reducing noise. This technical solution is particularly suitable for target frequencies with a wide and flat spectrum.

[0097] It should be noted that the present embodiment does not limit the specific material of the porous material piece 7, as long as the porous material piece 7 has a good sound absorption effect to meet the noise reduction requirement.

[0098] In addition, it should be noted that the above-mentioned embodiments do not limit the specific number of the sound cavity walls 22. The number of the sound cavity walls 22 can be one or at least two. The more the sound cavity walls 22 are, the more silencing cavities are formed, and the better the noise reduction effect.

[0099] Please refer to Figure 1 and Figure 3 In some embodiments, the number of the sound cavity walls 22 is at least two, all of the sound cavity walls 22 are spaced apart along the axial direction of the inner shell 2, and a through hole 211 is provided between any two adjacent sound cavity walls 22 and between the sound cavity wall 22 farthest from the base 3 and the cylinder bottom 12.

[0100] That is to say, in this embodiment, more than two sound cavity walls 22 are provided to form at least two silencing chambers. For example, the number of the sound cavity walls 22 is three, namely the first sound cavity wall 221, the second sound cavity wall 222 and the third sound cavity wall 223. The first sound cavity wall 221, the second sound cavity wall 222 and the third sound cavity wall 223 are arranged in sequence. The first sound cavity wall 221 is close to the base 3, and then the first sound cavity wall 221 and the second sound cavity wall 222 form a first silencing chamber, the second sound cavity wall 222 and the third sound cavity wall 223 form a second silencing chamber, and the third silencing chamber is formed between the third sound cavity wall 223 and the bottom 12 of the outer shell 1. It can be understood that a through hole 211 is provided between any two adjacent sound cavity walls 22 and between the sound cavity wall 22 farthest from the base 3 and the bottom 12 of the shell 1 to ensure that each silencing chamber is connected to the inner hole of the inner shell 2.

[0101] It should be noted that the present embodiment does not limit the specific arrangement of the through hole 211 , as long as the through hole 211 can connect the silencer cavity with the inner hole of the inner shell 2 .

[0102] Please continue to refer to Figure 1 and Figure 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 arranged between any two adjacent sound cavity walls 22, the first through hole 2111 extends along the first axial side of the inner shell 2 to the sound cavity wall 22 close to the first side, so that the sound cavity wall 22 close to the first side serves as the hole wall of the first side of the first through hole 2111, and a preset distance is provided between the hole wall of the second axial side of the first through hole 2111 and the sound cavity wall 22 close to the second side; the second through hole 2112 is arranged between the sound cavity wall 22 farthest from the base 3 and the cylinder bottom 12, the second through hole 2112 extends along the third axial side 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, and a preset distance is provided between the fourth axial side of the second through hole 2112 and the sound cavity wall 22 farthest from the base 3.

[0103] That is to say, the first through hole 2111 located between any two adjacent sound cavity walls 22 in this embodiment is not located in the middle position between the two sound cavity walls 22, but the first through hole 2111 is offset near one of the sound cavity walls 22, so that one of the sound cavity walls 22 becomes the hole wall of the first through hole 2111; the second through hole 2112 located between the sound cavity wall 22 farthest from the base 3 and the cylinder bottom 12 is not located in the middle position between the sound cavity wall 22 farthest from the base 3 and the cylinder bottom 12, but the second through hole 2112 is offset at one end of the inner shell 2 close to the cylinder bottom 12, so that the second through hole 2112 is an open structure. In this way, the first through hole 2111 and the second through hole 2112 are conveniently formed.

[0104] It should be noted that this embodiment does not limit the number of through holes 211 corresponding to a single silencer cavity. For example, one through hole 211 may be provided at a position of the inner shell 2 corresponding to a single silencer cavity, or at least two through holes 211 may be provided.

[0105] It should be noted that the embodiment of the present invention does not limit the specific shape of the through hole 211, and the shape of the through hole 211 can be circular, square, rectangular or other shapes.

[0106] In addition, the embodiment of the present invention does not limit the shapes of the cross sections of the first barrel 11 and the second barrel 21. For example, the shapes of the cross sections of the first barrel 11 and the second barrel 21 can be circular, hexagonal or other geometric shapes.

[0107] Considering the convenience of connecting the outer shell 1 with the inner shell 2, in some embodiments, the end of the outer shell 1 away from the bottom 12 of the cylinder is connected to the sound cavity wall 22 closest to the base 3. That is to say, during installation, the end of the inner shell 2 away from the base 3 is inserted into the outer shell 1 from the end of the outer shell 1 away from the bottom 12 of the cylinder, and then the end of the outer shell 1 away from the bottom 12 of the cylinder is connected to the sound cavity wall 22 closest to the base 3, for example, the sound cavity wall 22 is welded or bonded to the end of the outer shell 1 away from the bottom 12 of the cylinder at the edge of the sound cavity wall 22 closest to the base 3, so as to connect the outer shell 1 with the inner shell 2 together, so that the outer shell 1 and the inner shell 2 are assembled into a whole. It should be noted that, except for the connection between the sound cavity wall 22 closest to the base 3 and the end of the outer shell 1 away from the bottom 12 of the cylinder, the contact surface of the other sound cavity walls 22 and the inner side wall of the outer shell 1 maintains zero gap contact. This assembly and connection method of the silencer has been verified by simulation tests. The silencer of this structure can meet the structural reliability requirements and will not be damaged under a 50G square wave impact.

[0108] In addition, it should be noted that the above-mentioned embodiment does not limit the specific design method of the size parameters of the silencer cavity. For example, when the silencer cavity is a Helmholtz resonance cavity, the size parameters of the silencer cavity can be determined according to the conventional design method of the Helmholtz resonance cavity; when the silencer cavity is a quarter-wavelength resonance cavity, the size parameters of the silencer cavity can be determined according to the conventional design method of the quarter-wavelength resonance cavity.

[0109] However, according to the conventional design method of the Helmholtz resonance cavity to determine the size parameters of the silencer, there is a certain deviation between the actual sound absorption and noise reduction capability of the designed silencer and the target frequency that needs to be eliminated during its design. Therefore, in order to improve the accuracy of the sound absorption and noise reduction of the silencer cavity, in some embodiments, when determining the size parameters of the silencer, the target frequency of the noise absorbed by the silencer cavity is obtained; and the frequency correction coefficient is determined; according to the frequency correction coefficient and the target frequency, the correction frequency is obtained; according to the correction frequency, the size parameters of the silencer cavity are designed.

[0110] That is to say, this embodiment uses the frequency correction coefficient to correct the target frequency of the noise that the silencer is used to absorb, and then uses the corrected frequency to design the silencer so that the frequency of the noise that the designed silencer can actually eliminate is consistent with the target frequency. That is, through this silencer design method, the silencer can be made to correspond to the target frequency it wants to eliminate, thereby achieving a better noise reduction effect.

[0111] It should be noted that this embodiment does not limit the specific method for determining the frequency correction coefficient, and those skilled in the art can obtain it through repeated experiments. The frequency correction coefficient is related to the distance from the through hole 211 of the muffler cavity to the end of the muffler along the axial direction, the number of muffler cavities, and the arrangement of the muffler cavities. In some embodiments, the frequency correction coefficient ranges from 1.2 to 3.

[0112] In addition, it is understandable that in actual use, it is hoped that the silencer can have a good noise reduction effect on noise within a certain frequency range, rather than just acting on a single target frequency. Moreover, usually, there are certain requirements for the target amplitude of the noise that the silencer can eliminate. Therefore, in some embodiments, before designing the size parameters of the silencer cavity according to the correction frequency, it also includes:

[0113] Obtain the target amplitude of noise that needs to be eliminated by the anechoic chamber;

[0114] Obtaining a target bandwidth of the noise that the anechoic cavity is intended to absorb;

[0115] According to the correction frequency, the size parameters of the silencer cavity are designed, including:

[0116] The size parameters of the silencing cavity are designed according to the correction frequency, frequency correction coefficient, target amplitude and target bandwidth.

[0117] That is to say, when designing the size parameters of the silencing cavity, this embodiment also takes the target amplitude and target bandwidth into consideration as design targets, and at the same time, uses the correction frequency to correct the target amplitude and target bandwidth, and combines the correction frequency obtained in the above embodiment to jointly determine the size parameters of the silencing cavity. It can be seen that the silencing cavity obtained by this embodiment can be applied to a specific frequency band, has a wide range of application, and is highly versatile.

[0118] When specifically designing the size parameters of the silencer cavity, the silencer cavity can be designed according to the following two formulas.

[0119] ,

[0120]

[0121] in, is the target frequency of the noise absorbed by a single silencing cavity, ε is the frequency correction coefficient, c is the speed of sound waves in the air, c=343 m / s, is the sum of the areas of the through holes 211 corresponding to a single silencer cavity, is the thickness of the inner shell 2, is the volume of a single silencer cavity, is the area of ​​the cross section of the inner shell 2 away from the outer shell 1 (the cross section perpendicular to the axis of the inner shell 2), A is the target amplitude of the noise to be eliminated by the silencer cavity, The target bandwidth of the noise that the anechoic cavity is designed to absorb.

[0122] Please refer to Fig.10 and Fig.11 In addition to the above-mentioned silencer, the present invention also provides a silencer assembly including the silencer disclosed in the above-mentioned embodiment, the silencer assembly includes at least one of the above-mentioned silencers, and the silencer assembly also includes a fan frame 4, the fan frame 4 is provided with at least one fan, and the silencer corresponds to the fan.

[0123] The key point of this embodiment is that the silencer disclosed in any one of the above embodiments has the same beneficial effects as the above silencer, which will not be described in detail here.

[0124] It should be noted that this embodiment does not limit the specific number of silencers, and one silencer can be installed on the fan frame 4. In actual applications, if space permits, a silencer can be installed at the positions corresponding to all fans in the fan frame 4 to achieve the best noise reduction effect.

[0125] In addition, considering the convenience of assembling the muffler with the fan frame 4, in some embodiments, the number of the mufflers is at least two, and all the mufflers are mounted on the same mounting seat 5, and the mounting seat 5 is connected to the fan frame 4. That is to say, during assembly, all the mufflers can be respectively mounted on the mounting seat 5, and then the mounting seat 5 is connected to the fan frame 4. That is, in this embodiment, by adding the mounting seat 5, the integration of all the mufflers is realized, and by integrating all the mufflers on the same mounting seat 5, the synchronous installation of all the mufflers on the fan frame 4 can be realized, and the assembly is convenient.

[0126] It should be noted that the present embodiment does not limit the specific 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.

[0127] 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, it is only necessary to disassemble the inner shell 2 or the outer shell 1 from the base 3 without disassembling the base 3, so as to facilitate on-site maintenance, etc.

[0128] In addition, the present embodiment does not limit the specific 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.

[0129] In addition to the above-mentioned muffler assembly, the present invention also provides a server including the muffler assembly disclosed in the above-mentioned embodiment. For the structures of other parts of the server, please refer to the relevant technology and will not be described in detail herein.

[0130] The key point of this embodiment is that the muffler assembly disclosed in any one of the above embodiments has the same beneficial effects as the above muffler assembly, which will not be described in detail here.

[0131] It should also be noted that, in this specification, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0132] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0133] The silencer, silencer assembly and server provided by the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A muffler, characterized in that: include: The outer shell (1) comprises a first cylinder (11) and a hollow cylinder bottom (12) arranged at one end of the first cylinder (11); The inner shell (2) comprises a second cylinder (21) and a sound cavity wall (22) arranged at the outer periphery of the second cylinder (21), wherein the second cylinder (21) is provided with a through hole (211) penetrating the thickness of the wall; A base (3) connected to at least one of the first cylinder (11) and the second cylinder (21), and located at an end of the muffler away from the cylinder bottom (12); The inner shell (2) is arranged inside the outer shell (1), and one end of the outer shell (1) away from the cylinder bottom (12) is connected to the inner shell (2), and the sound cavity wall (22) is in contact with 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; The base (3) is detachably connected to one of the first cylinder (11) and the second cylinder (21), so that when the silencer is installed on a fan frame (4) of a server, the assembly structure of the outer shell (1) and the inner shell (2) can be separated from the base (3), so that the base (3) can be retained on the fan frame (4) by disassembling the assembly structure.

2. The muffler according to claim 1, characterized in that: One of the base (3) and the first cylinder (11) is provided with a first buckle position, and the other is provided with a second buckle position for buckling with the first buckle position.

3. The muffler according to claim 2, characterized in that: The first buckle position is an L-shaped groove (31) provided on the base (3), and the L-shaped groove (31) has an opening. The second buckle position is a protrusion (13) provided on the first cylinder (11), and the protrusion (13) enters the L-shaped groove (31) from the opening and buckles with the L-shaped groove (31) by rotation.

4. The muffler according to claim 3, characterized in that: The base (3) comprises at least two flange portions (36) spaced apart along the circumference of the muffler, the flange portion (36) protruding from one end of the base (3) along the axial direction of the muffler, and each flange portion (36) is provided with the L-shaped groove (31); The protrusion (13) is arranged on the outer periphery of the first cylinder (11); The base (3) further comprises a sealing member (6) arranged in an area surrounded by all the flange portions (36), the sealing member (6) being used for being in close contact with the end surface of the first cylinder (11).

5. The muffler according to claim 1, 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).

6. The muffler according to claim 5, characterized in that: The base (3) is provided with a first bell-mouth structure (33), wherein the radial dimension of the first bell-mouth structure (33) gradually increases from an end close to the inner shell (2) to an end far from the inner shell (2).

7. The muffler according to claim 6, characterized in that: The first threaded portion (32) is provided at one end of the first bell mouth structure (33) close to the inner shell (2), and the second cylinder (21) is provided with the second threaded portion (23).

8. The muffler according to any one of claims 1 to 7, characterized in that: The cylinder bottom (12) comprises a second bell-mouth structure (121), wherein the radial dimension of the second bell-mouth structure (121) gradually increases from an end close to the first cylinder (11) to an end far from the first cylinder (11).

9. The silencer according to any one of claims 1 to 7, characterized in that: The base (3) is provided with a mounting plate (34), and the mounting plate (34) is provided with a mounting hole (35). The mounting hole (35) is used for a fastener to pass through, so as to connect the muffler to the fan frame (4) by means of the fastener.

10. The muffler according to claim 9, characterized in that The mounting hole (35) comprises: At least one calabash hole (351) for inserting a stud on the mounting surface (41) of the fan frame (4) and for sliding the muffler so that the stud and the calabash hole (351) are in place; At least one first locking hole (352) is used to align with a second locking hole (42) on the mounting surface (41) when the stud is in place with the gourd hole (351), so as to lock the muffler and the fan frame (4) through a locking member respectively connected to the first locking hole (352) and the second locking hole (42).

11. The muffler according to any one of claims 1 to 7, characterized in that: The anechoic cavity comprises a Helmholtz resonant cavity or a quarter-wavelength resonant cavity.

12. The muffler according to any one of claims 1 to 7, characterized in that: A porous material piece (7) is provided in the muffler cavity. The porous material piece (7) is sleeved on the outer periphery of the inner shell (2) and is located between any two adjacent sound cavity walls (22).

13. The silencer according to any one of claims 1 to 7, characterized in that: The number of the sound cavity walls (22) is at least two, all of the sound cavity walls (22) are spaced apart along the axial direction of the inner shell (2), and the through hole (211) is provided between any two adjacent sound cavity walls (22) and between the sound cavity wall (22) farthest from the base (3) and the cylinder bottom (12).

14. The muffler according to claim 13, characterized in that The through hole (211) comprises: A first through hole (2111) is provided between any two adjacent sound cavity walls (22), the first through hole (2111) extending along a first axial side of the inner shell (2) to the sound cavity wall (22) close to the first side, so that the sound cavity wall (22) close to the first side serves as a hole wall on the first side of the first through hole (2111), and a preset distance exists between a hole wall on a second axial side of the first through hole (2111) and the sound cavity wall (22) close to the second side; The second through hole (2112) is arranged between the sound cavity wall (22) farthest from the base (3) and the cylinder bottom (12); the second through hole (2112) extends along the third axial side 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; and the second through hole (2112) has a preset distance from the sound cavity wall (22) farthest from the base (3) along the fourth axial side of the inner shell (2).

15. The silencer according to any one of claims 1 to 7, characterized in that: One end of the housing (1) away from the cylinder bottom (12) is connected to the sound cavity wall (22) closest to the base (3).

16. The silencer according to any one of claims 1 to 7, characterized in that: When determining the size parameters of the silencer, the target frequency of the noise that the silencer cavity is used to absorb is obtained; and a frequency correction coefficient is determined; a correction frequency is obtained based on the frequency correction coefficient and the target frequency; and the size parameters of the silencer cavity are designed based on the correction frequency.

17. The muffler according to claim 16, characterized in that Before designing the size parameters of the silencing cavity according to the correction frequency, the method further includes: Obtaining a target amplitude of noise that needs to be eliminated by the silencing chamber; Obtaining a target bandwidth of noise that the silencing cavity is used to absorb; According to the correction frequency, the size parameters of the silencing cavity are designed, including: The size parameters of the silencing cavity are designed according to the correction frequency, the frequency correction coefficient, the target amplitude and the target bandwidth.

18. A muffler assembly, characterized in that: It comprises a fan frame (4) and at least one silencer, wherein the silencer is the silencer according to any one of claims 1 to 17, the fan frame (4) is provided with at least one fan, and the silencer corresponds to the fan.

19. The muffler assembly according to claim 18, characterized in that The number of the silencers is at least two, and all the silencers are mounted on the same mounting seat (5), and the mounting seat (5) is connected to the fan frame (4).

20. The muffler assembly of claim 19, wherein: The base (3) of the silencer is connected to the mounting seat (5), and at least one of the outer shell (1) and the inner shell (2) of the silencer is detachably connected to the base (3).

21. A server, characterized in that: A muffler assembly comprising any one of claims 18-20.

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