WO2022193686A1

WO2022193686A1 - Hard disk assembly, hard disk bracket, and server

Info

Publication number: WO2022193686A1
Application number: PCT/CN2021/129665
Authority: WO
Inventors: 林广磷; 危敏
Original assignee: 华为技术有限公司
Priority date: 2021-03-18
Filing date: 2021-11-10
Publication date: 2022-09-22

Abstract

Disclosed in embodiments of the present application are a hard disk assembly, a hard disk bracket, and a server. The embodiments of the present application can be applied to noise reduction of a server complete machine or a whole cabinet, and can specifically be implemented on an acoustic wave transfer path. The hard disk assembly comprises a noise reduction layer, a hard disk bracket, and a hard disk disposed on the hard disk bracket. The noise reduction layer covers the hard disk or the hard disk bracket, is located between a noise sound source and the hard disk, and is used for weakening the noise transferred to the hard disk. In this way, the noise reduction layer is used on the acoustic wave transfer path for isolating, so that acoustic waves are reflected or vibration is generated on the surface of a film, an acoustic energy is converted into a mechanical energy to be consumed, and the acoustic energy transferred to the hard disk is reduced, thereby improving the anti-noise capability of the hard disk, and ensuring good IOPS performance.

Description

A hard disk assembly, hard disk tray and server

This application claims the priority of the Chinese patent application with the application number 202110290085.1 and the invention titled "Anti-noise Structure for Hard Disk" filed with the China Patent Office on March 18, 2021, and the application filed on April 27, 2021 The priority of the Chinese patent application No. 202110461321.1 and the invention title is "A Hard Disk Assembly, Hard Disk Tray and Server", the entire contents of the aforementioned two patent applications are incorporated into this application by reference.

technical field

Embodiments of the present application relate to the field of computer hardware, and in particular, to a hard disk assembly, a hard disk bracket, and a server.

Background technique

Computer devices such as servers need to be equipped with hard disks to obtain mass storage capabilities. Due to the limitation of the thickness of the hard disk, the mechanical hard disk cannot increase the capacity by infinitely increasing the number of discs. The increase in the capacity of the hard disk can only be achieved by increasing the track density and the number of data storage in a single track. Based on this feature, in the process of hard disk reading and writing, the tracking accuracy of the magnetic head is required to be higher, and the yaw amplitude of the magnetic head (head track error signal) needs to be smaller to obtain a good number of reads and writes per second (IOPS, Input /Output Operations Per Second) performance.

With the evolution of server CPUs, higher system cooling capacity is required to meet the increasing CPU power consumption. The higher the rotation speed of the fan selected by the server, the louder the noise. The noise generated during the working process can be transmitted to the hard disk case through air vibration. As we all know, when the frequency of the vibration is close to the natural vibration frequency of the magnetic arm or the magnetic head of the hard disk, the magnetic arm and the magnetic head will resonate, resulting in a large deflection of the magnetic head track. If the track is unsuccessful for many times, the IOPS performance will be degraded. . In particular, the above problems are more prominent in the process of reading and writing large-capacity hard disks. If the IOPS drops to 0 and remains for a certain period of time, in order to prevent the physical damage of the hard disk, the system will kick out the hard disk, thus affecting the user's use.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a hard disk assembly, a hard disk bracket, and a server, which can effectively improve the anti-noise capability of the hard disk without affecting the original performance of components such as fans.

A first aspect of an embodiment of the present application provides a hard disk assembly, including a noise reduction layer, a hard disk bracket, and a hard disk disposed on the hard disk bracket; the noise reduction layer covers the hard disk or the hard disk bracket, and is located at a noise source Between the noise source and the hard disk, it is used to reduce the noise transmitted to the hard disk. In this way, a noise reduction layer is used to cut off the sound wave transmission path, so that the sound wave is reflected or the surface of the film is vibrated, the sound energy is converted into mechanical energy and consumed, and the sound energy transmitted to the hard disk is reduced, thereby improving the resistance of the hard disk. Noise capability ensures good IOPS performance. At the same time, applying the noise reduction layer to improve the anti-noise capability of the hard disk is arranged on the side near the hard disk, which does not have any impact on the performance of the noise source, such as but not limited to, it will not affect the cooling capability of the cooling fan.

Based on the first aspect, the embodiments of the present application also provide the first implementation of the first aspect: the material of the noise reduction layer is different from the material of the hard disk housing or the hard disk bracket, so that the forced bending caused by the action of sound waves The vibration, noise reduction layer and the hard disk shell or the hard disk bracket have different matching frequencies, and the matching valleys of the two are staggered from each other, which can weaken the matching effect and improve the sound insulation effect.

Based on the first aspect, or the first implementation manner of the first aspect, the embodiments of the present application further provide a second implementation manner of the first aspect: the thickness of the noise reduction layer is different from the thickness of the hard disk housing or the hard disk tray , it can also make the coincidence frequency formed on the noise reduction layer and the hard disk shell or the hard disk bracket different, and weaken the coincidence effect.

Based on the first aspect, or the first implementation manner of the first aspect, or the second implementation manner of the first aspect, the embodiments of the present application further provide a third implementation manner of the first aspect: the noise reduction layer covers the hard disk or on the side of the hard drive bay adjacent to the source of the noise. In this way, the noise reduction layer is disposed on the side facing the sound source component, which has the best noise reduction efficiency.

Based on the first aspect, or the first implementation manner of the first aspect, or the second implementation manner of the first aspect, or the third implementation manner of the first aspect, the embodiments of the present application further provide a third implementation manner of the first aspect Four implementations: the hard disk bracket includes a handle bar and two side panels, wherein the two side panels are fixedly connected to both ends of the handle bar to enclose a hard disk accommodating space with an opening; the noise reduction layer covers the hard disk. The bracket specifically includes: covering the open position and/or the surface of at least one of the two side panels. In this way, based on the small physical distance between the hard disk bracket and the hard disk, the anti-noise capability of the hard disk side is improved more significantly; and the noise reduction layer can be selectively installed according to actual needs, which reduces the difficulty of actual production and assembly.

Exemplarily, the hard disk tray may be of a vertical insertion type, one of the two side panels is located on the side adjacent to the noise source, and the inner surface and/or the outer surface of the side panel is covered with a noise reduction layer; That is, the side plate facing the noise source is covered with the noise reduction layer. For the vertical-insertion hard disk assembly method, the manufacturing and assembly costs can be reasonably controlled on the basis of obtaining good noise reduction efficiency.

Exemplarily, for a vertically inserted hard disk tray, the noise reduction layer can be located on the inner surface of the side panel on the side adjacent to the noise source, and the thickness is 0.1 mm, so that without affecting the main structural design of the current product, Improve the anti-noise capability of the hard disk, with better adaptability.

Based on the first aspect, or the first embodiment of the first aspect, or the second embodiment of the first aspect, or the third embodiment of the first aspect, or the fourth embodiment of the first aspect, this The application example also provides a fifth implementation of the first aspect: the opening of the hard disk bracket includes a base plate, and the two side edges of the base plate are fixedly connected to the two side plates respectively; the noise reduction layer covers the opening. The position of the mouth is specifically covered on the surface of the base plate. Based on the setting of the base plate, a noise reduction layer can be used at the open position to isolate and reduce noise as required.

Exemplarily, the hard disk tray may be of a horizontal insertion type, and the opening is located on the side adjacent to the noise source component, that is, on the side directly opposite to the noise source, a matching base plate and noise reduction layer are arranged, Therefore, for the horizontally inserted hard disk assembly method, a good noise reduction efficiency can be obtained.

Exemplarily, for a horizontally inserted hard disk tray, the sum of the thicknesses of the base plate and the noise reduction layer is 0.6 mm, so that the anti-noise capability of the hard disk can be improved without affecting the main structure design of the current product, and it has better performance. Adaptable.

Based on the first aspect, or the first embodiment of the first aspect, or the second embodiment of the first aspect, or the third embodiment of the first aspect, or the fourth embodiment of the first aspect, or The fifth implementation of the first aspect, the embodiment of the present application also provides the sixth implementation of the first aspect: between the noise reduction layer and the hard disk bracket or the hard disk, glue, local clamping, screws are used. Tighten or riveted connection to weaken the sound bridge on the sound wave transmission path, loss through vibration transmission, and further improve the reliability of energy absorption and sound insulation.

Based on the first aspect, or the first embodiment of the first aspect, or the second embodiment of the first aspect, or the third embodiment of the first aspect, or the fourth embodiment of the first aspect, or The fifth implementation manner of the first aspect, or the sixth implementation manner of the first aspect, the embodiment of the present application also provides the seventh implementation manner of the first aspect: the noise reduction layer is covered on the hard disk, and specifically includes a cover on at least one surface of the hard disk housing. It can be selectively installed according to actual needs, which reduces the difficulty of actual production and assembly.

In some practical applications, the noise reduction layer covers multiple surfaces of the hard disk, thereby maximizing the noise reduction efficiency.

Based on the seventh implementation manner of the first aspect, the embodiments of the present application further provide the eighth implementation manner of the first aspect: in a projection plane parallel to the noise reduction layer, at least one side edge of the outline of the noise reduction layer Outside the outer contour of the hard disk, that is, the noise reduction layer has a portion that extends beyond the surface of the hard disk. In this way, when the sound wave reaches the excess portion of the noise reduction layer, its diffraction path can form an acoustic shadow area in the area adjacent to the hard disk and the noise reduction layer, which can further reduce the impact of noise on the IOPS of the hard disk.

Based on the first aspect, or the first embodiment of the first aspect, or the second embodiment of the first aspect, or the third embodiment of the first aspect, or the fourth embodiment of the first aspect, or The fifth implementation manner of the first aspect, or the sixth implementation manner of the first aspect, or the seventh implementation manner of the first aspect, or the eighth implementation manner of the first aspect, the examples of the present application also provide The ninth embodiment of the first aspect: the noise reduction layer can be made of metal or non-metal material, such as but not limited to, aluminum foil or copper foil, or general plastic or engineering plastic or special plastic; By setting, the material of the noise reduction layer can be determined according to the material properties of different adapting member bodies, which has good adaptability.

Exemplarily, the noise reduction layer is a sheet-like structure with a thickness of 0.1 mm to 2 mm, which occupies less space and does not affect the design of the main structure of the product in terms of overall layout.

Based on the first aspect, or the first embodiment of the first aspect, or the second embodiment of the first aspect, or the third embodiment of the first aspect, or the fourth embodiment of the first aspect, or The fifth embodiment of the first aspect, or the sixth embodiment of the first aspect, or the seventh embodiment of the first aspect, or the eighth embodiment of the first aspect, or the ninth embodiment of the first aspect This embodiment of the present application also provides a tenth embodiment of the first aspect: the noise reduction layer is provided as multiple layers, and there is an interval between two adjacent noise reduction layers. The air layer can reduce the stiffness of the sound bridge and generate losses through vibration transmission, thereby improving the anti-noise efficiency.

Based on the tenth embodiment of the first aspect, the embodiments of the present application further provide the eleventh embodiment of the first aspect: the interval is filled with viscoelastic damping material or sound absorbing material, which can further improve the vibration transmission loss .

In some practical applications, two adjacent noise reduction layers with a predetermined interval are fixedly connected by connecting pieces, the structure is simple and reliable, and the cost is controllable.

Based on the first aspect, or the first embodiment of the first aspect, or the second embodiment of the first aspect, or the third embodiment of the first aspect, or the fourth embodiment of the first aspect, or The fifth embodiment of the first aspect, or the sixth embodiment of the first aspect, or the seventh embodiment of the first aspect, or the eighth embodiment of the first aspect, or the ninth embodiment of the first aspect embodiment, or the tenth embodiment of the first aspect, or the eleventh embodiment of the first aspect, the embodiments of the present application also provide the twelfth embodiment of the first aspect: in the noise reduction layer A sound-absorbing material or a sound-insulating material is attached to the surface away from the component body to improve the vibration transmission loss.

A second aspect of the embodiments of the present application provides a hard disk bracket having a hard disk accommodating space for arranging a hard disk. The hard disk bracket is covered with a noise reduction layer, and the noise reduction layer is used to reduce the noise transmitted to the hard disk. In this way, the noise reduction layer is used to form a partition, so that when the sound wave is transmitted to the noise reduction layer, reflection occurs or the surface of the film vibrates, and the sound energy is converted into mechanical energy and consumed, reducing the sound energy transmitted to the hard disk, and improving the anti-noise of the hard disk. ability.

Based on the second aspect, the embodiments of the present application also provide the first implementation of the second aspect: the material of the noise reduction layer is different from the material of the hard disk housing or the hard disk bracket, so that by reducing the fit effect, the sound insulation is improved. Effect.

Based on the second aspect, or the first implementation manner of the second aspect, the embodiments of the present application further provide a second implementation manner of the second aspect: the thickness of the noise reduction layer is the same as the thickness of the hard disk casing or the hard disk tray Different, can also weaken the coincidence effect.

Based on the second aspect, or the first implementation manner of the second aspect, or the second implementation manner of the second aspect, the embodiments of the present application further provide a third implementation manner of the second aspect: the hard disk tray includes a handle bar and two side plates, wherein the two side plates are fixedly connected with the two ends of the handle bar respectively, so as to enclose a hard disk accommodation space with an opening; the noise reduction layer is covered on the hard disk bracket, which specifically includes: covering the open opening position and/or on the surface of at least one of the two side panels. In this way, based on the characteristic that the physical distance between the hard disk tray and the hard disk is small, the anti-noise capability of the hard disk side is improved more significantly.

Based on the second aspect, or the first implementation manner of the second aspect, or the second implementation manner of the second aspect, the embodiments of the present application further provide a fourth implementation manner of the second aspect: the opening of the hard disk tray The base plate includes a base plate, and the two side edges of the base plate are fixedly connected to the two side plates respectively; the noise reduction layer is covered on the open position, specifically, on the surface of the base plate. Through the setting of the base plate, the noise reduction layer can be used in the open position to isolate and reduce the noise according to the needs.

A third aspect of the embodiments of the present application provides a server, including a hard disk assembly arrayed in a server housing, and the hard disk assembly adopts the above-mentioned hard disk assembly, thereby improving the anti-noise capability of the hard disk side and ensuring good IOPS performance.

In some practical applications, the noise source includes a cooling fan, so as to avoid the influence of the working noise of the cooling fan of the server.

In other practical applications, the noise source also includes a power supply fan, so as to avoid the influence of the working noise of the server power supply fan.

Exemplarily, the noise source may further include a cooling air duct, so as to avoid the influence of noise generated by the impact of airflow in the air duct.

A fourth aspect of the embodiments of the present application provides an anti-noise method for a server, wherein a noise reduction layer is arranged on a sound wave transmission path from a noise sound source to a component to be anti-noise, the noise reduction layer is covered on a component body, and is configured as: Its material is different from that of the component body, and/or its thickness is different from that of the component body, so as to reduce the noise transmitted to the hard disk, thereby controlling the influence of the server operating noise as a whole.

Description of drawings

FIG. 1 is a schematic diagram of the principle of a server anti-noise method provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of the overall structure of a horizontally-inserted hard disk assembly according to Embodiment 1 of the present invention;

3 is a side view of a horizontally-inserted hard disk server according to Embodiment 1 of the present invention;

4 is a schematic diagram of a horizontally-inserted hard disk bracket according to Embodiment 1 of the present invention;

Fig. 5 is the top view of Fig. 4;

6 is a schematic diagram of a sound bridge attenuation principle according to Embodiment 1 of the present invention;

7 is a schematic diagram of a horizontally-inserted hard disk bracket according to Embodiment 2 of the present invention;

Fig. 8 is the G-G sectional view of Fig. 7;

9 is a schematic diagram of a horizontally-inserted hard disk bracket according to Embodiment 3 of the present invention;

Fig. 10 is the H-H sectional view of Fig. 9;

11 is a schematic diagram of the overall structure of a vertically-inserted hard disk assembly according to Embodiment 4 of the present invention;

12 is a side view of a hard disk vertical-insertion server according to Embodiment 4 of the present invention;

13 is a schematic diagram of a vertically-inserted hard disk bracket according to Embodiment 4 of the present invention;

14 is a schematic diagram of a hard disk according to Embodiment 5 of the present invention;

15 is a schematic diagram of a hard disk according to Embodiment 6 of the present invention;

FIG. 16 is a view from the direction I of FIG. 15 .

Detailed ways

The embodiment of the present application provides a method for anti-noise of a server, which can control the influence of the working noise of the server as a whole.

In the server anti-noise method provided by this embodiment, a noise reduction layer 3 is arranged on the sound wave transmission path from the noise sound source 1 to the component 2 to be anti-noise. The noise reduction layer 3 can be covered on a component body 4 and is located in the noise Between the sound source 1 and the component 2 to be anti-noise, for reducing the noise transmitted to the component 2 to be anti-noise. That is, on the sound wave transmission path generated by the noise sound source 1, the noise reduction layer 3 covered on the component body 4 is used to construct a physical barrier, so that the sound wave is reflected or the film surface is vibrated, so that the sound energy is converted into mechanical energy. It is consumed. Here, "a overlies a" refers to the azimuthal relationship based on the physical barrier constructed by the component body 4, rather than constituting a limitation on the size relationship of the specific surface area that the noise reduction layer 3 is adapted to the component body 4.

Among them, the noise source 1 refers to the components that generate working noise during the operation of the server. In a broad sense, the working noise during the operation of the server comes from different internal components, such as but not limited to cooling fans, power fans, and airflow in the air duct. Disordered noise. Corresponding working noises have different degrees of influence on the performance of internal functional components, wherein the components to be anti-noise 2 refer to components that need to avoid noise affecting their own functions, such as, but not limited to, hard disks and server CPUs. The component body 4 refers to the structure of the noise sound wave transmission path generated by the noise sound source 1, such as, but not limited to, the original functional structure of a server such as a hard disk tray, a hard disk, or a structure added on the basis of the original functional structure. . The server anti-noise method provided in this embodiment can be applied to any internal functional elements of the server.

The sound insulation principle of the embodiment of the present application is shown in FIG. 1 . Without loss of generality, the working mechanism of the server anti-noise method in this embodiment will be described in detail below, taking the hard disk as the anti-noise component 2 and the cooling fan of the server CPU as the noise sound source 1 . As shown in the figure, the hard disk bracket located between the cooling fan and the hard disk is a component body 4 covered with a noise reduction layer 3,

The existing hard disk bracket is placed between the cooling fan and the hard disk. Based on the noise generated by the fan, the surface of the bracket on the side receiving the sound vibrates, which is transmitted through the bracket body to the surface on the other side connected to the hard disk, and then transmitted to the hard disk. In this embodiment, a layer of noise reduction layer 3 is covered on the hard disk bracket. The sound waves generated from the noise sound source 1 are transmitted to the noise reduction layer 3 and the incident sound waves (original sound energy E0) will be reflected (energy consumption Eτ) and transmitted. (Energy consumption ET), during the process, the surface of the noise reduction layer vibrates, and this part of the energy consumption is converted into mechanical energy and consumed, that is, the sound energy formed by absorbing sound wave loading, effectively reduces the noise transmitted to the hard disk.

In addition, after the sound waves generated by the noise sound source 1 are transmitted to the body of the hard disk tray, the tray body is forced to vibrate along the board surface direction in addition to being forced to vibrate in the direction perpendicular to the sound. If at a certain frequency, the forced bending vibration matches the inherent free bending vibration of the bracket body, the bracket body will bend following the incident sound wave, causing a large amount of sound energy to be transmitted to the side of the hard disk, forming a sound insulation valley.

In order to avoid the above-mentioned coincidence effect between the noise reduction layer and the hard disk tray body and avoid the possibility of vibration superposition, in this embodiment, the material of the noise reduction layer 3 can be different from the material of the component body 4, that is, the noise reduction layer 3 can be made of different materials. The layer and the hard disk carrier body are made of different materials to avoid the coincidence frequency with the hard disk carrier body; in addition, the thickness of the noise reduction layer 3 can also be different from the thickness of the component body 4. Similarly, the noise reduction layer and the hard disk carrier When the thickness of the frame body is different, the coincidence frequency can also be avoided to be consistent with the hard disk bracket body.

In practical applications, different materials and different thicknesses can be selected according to the needs, and the matching valleys of the noise reduction layer 3 and the component body 4 can be staggered from each other, so as to reduce the matching effect and further absorb the sound energy formed by the loading of sound waves. (energy consumption Eα), the sound insulation can be further improved.

It can be understood that, in practical applications, the noise reduction layer 3 and the component body 4 do not necessarily need to use different materials and different thicknesses, and the structural deformation can also prevent the two from superimposing vibrations at the matching frequency, such as but not limited to , a raised structure, a material-removed structure, or a structure such as a thickness gradient can be used, which is not limited here.

The hard disk components of the server are usually arranged in an array in the server casing by horizontal or vertical insertion. In this paper, a hard disk bracket a refers to the installation structure in which the hard disk is arranged in the server casing. In addition to the basic structures such as handle bars and side panels, it also includes other structures used for installing hard disks.

Based on the working noise generated by the cooling fan, this embodiment will describe in detail the specific implementation of the anti-noise principle for the horizontally-inserted hard disk assembly and the vertically-inserted hard disk assembly respectively. For ease of description, three directions are defined in this document based on the angle at which the operator faces the server panel: the first direction X is the left-right direction, the second direction Y is the front-rear direction, and the third direction Z is the vertical direction.

Example 1

As shown in FIG. 2 , the hard disk assembly 10 provided in this embodiment is a horizontal insertion type, and the hard disk 11 is placed in the hard disk cavity space formed inside the hard disk bracket 12 . During assembly, the hard disk assembly 10 is inserted into the server housing 20 along the second direction Y (front-rear direction), and is designed according to the actual product type, along the first direction X (left-right direction) and the third direction Z (vertical direction) For the arrangement of the array, please refer to FIG. 3 together, which shows a top view of the horizontally-inserted hard disk server provided in this embodiment. Along the second direction Y, the cooling fan 30 is located inside the hard disk assembly 10 .

In this embodiment, the sound absorbing layer 13 for absorbing the sound energy formed by the loading of sound waves can be covered on the body of the hard disk tray 12 . The hard disk bracket 12 of the horizontally inserted hard disk assembly includes a handle bar 121 and two side plates 122 fixed at both ends of the handle bar 121 to enclose and form an open hard disk accommodating space. Specifically, the sound absorbing layer 13 may cover the inner surface and/or the outer surface of the handle bar 121 and/or the two side panels 122 .

The handle bar 121 is located at the front side of the server, that is, at the far end of the sound wave transmission path of the noise generated by the cooling fan 30 , as the operation force part for assembly and disassembly, so it is not the optimal choice for configuring the noise reduction layer.

It can be understood that, in the implementation scheme using the hard disk tray 12 as the component body, the noise reduction layer 13 can be configured on different side bodies of the hard disk tray 12 . Preferably, the noise reduction layer 13 is disposed on the side of the hard disk bracket 12 adjacent to the cooling fan 30 , that is, the side facing the cooling fan 30 , which has the best noise reduction efficiency. Please refer to the schematic diagrams of the hard disk tray shown in Figure 4 and Figure 5 together. Specifically, the opening of the hard disk bracket 12 includes a base plate 123 , two sides of the base plate 123 are fixedly connected to the two side plates 122 respectively, and the base plate 123 is located on the side of the bracket body facing the cooling fan 30 . .

As shown in FIG. 4 , the inner surface of the base plate 123 is covered with a noise-reducing layer 13 . Compared to the cooling fan 30 , the noise-reducing layer 13 covers the non-sound-receiving side of the hard disk tray base plate 123 . In the second direction Y, the associated structure has a relatively large space margin, so that the thickness of the base plate 123 and the noise reduction layer 13 can be up to 0.6 mm, which improves the anti-noise capability of the hard disk without affecting current products. Main structure design.

Of course, the method of arranging the base plate for disposing the noise reduction layer at the opening of the hard disk tray can be applied to a vertically-inserted hard disk tray.

It should be noted that the outer dimension and shape of the noise reduction layer 13 are preferably consistent with the outer dimensions and shape of the horizontally inserted hard disk tray 10 and the side opposite to the cooling fan 30, so as to cover the hard disk 11 in the second direction Y, Use this area to maximize noise immunity. The noise reduction layer 13 can be a metal sheet-like structure with a thickness of 0.1 mm to 2 mm, such as but not limited to aluminum foil or copper foil; or, can be a non-metallic sheet-like structure with a thickness of 0.1 mm to 2 mm, such as but not limited to general plastic Or engineering plastics or special plastics, etc., preferably PC (polycarbonate, Polycarbonate), PPS (polyphenylene sulfide, Polyphenylene sulfide), ABS (acrylonitrile-butadiene-styrene copolymer, Acrylonitrile Butadiene Styrene), PET (Polyethylene terephthalate, Polyethylene terephthalate) or PA66 (polyamide 66 or nylon 66, Polyamide 66), or reinforced composites obtained by adding glass fiber to PC, PPS, ABS or PA66 substrates Material.

During operation, the larger the area of the noise reduction layer 13 is, the more the reflection energy consumption Eτ and the transmission energy consumption ET are formed, and the larger the contact area between the noise reduction layer 13 and the base plate 123 is, correspondingly, the rigidity between the two is increased. The stronger the connection, the sound bridge formed will affect the sound isolation. In order to avoid the sound bridge between the noise reduction layer 13 and the base plate 123 from affecting the sound insulation effect, the noise reduction layer 13 may preferably be connected to the base plate 123 in the following manner.

The first alternative implementation is that the noise reduction layer 13 is fixed on the base plate 123 by adhesive bonding, the cured adhesive has a certain elasticity, and the two are in non-complete rigid contact, which can reduce the transmission of sound waves Influence of acoustic bridge stiffness on sound insulation during the process. In this way, the advantages of the large-area noise reduction layer 13 in the reflection energy consumption Eτ and the transmission energy consumption ET can be fully utilized, so as to avoid the influence of the sound bridge between the two on the anti-noise effect.

The second alternative implementation is that the noise reduction layer 13 and the base plate 123 are fixed by partial clamping, or partial screw fastening or partial riveting, compared to the fixed connection between the two contacting and fitting surfaces. The method is not completely rigid contact, which can also reduce the influence of the stiffness of the sound bridge on the sound insulation effect in the process of sound wave transmission. It should be understood that if the noise reduction layer 13 is made of metal or non-metal material, a good sound insulation effect can be obtained.

In a third optional implementation manner, the noise reduction layer 13 is made of a non-metallic material, and after being fixed on the base plate 123 , the influence of excessive rigidity of the sound bridge between the two on the sound insulation effect can also be avoided.

In the above-mentioned connection mode of non-complete rigid contact, the vibration level of the noise reduction layer 13 is obviously smaller than that of the base plate 123 by reasonably controlling the stiffness of the sound bridge. Please also refer to the schematic diagram of the attenuation relationship of the sound bridge shown in FIG. 6 , the noise reduction layer 13 and the base plate 123 of the hard disk tray are in non-complete rigid contact to reduce the influence of the sound bridge F on the sound insulation effect.

For the two types of hard disk trays, 0.1mm Mylar (such as but not limited to PET polyester film) is pasted on their corresponding bodies respectively, and the IOPS performance test is carried out under the same test conditions as the original hard disk tray.

Among them, the test results based on model A are shown in Table 1 below. The noise reduction in the hard disk slot is about 1dB, the IOPS performance is improved from 93.9% to 96.3%, and the IOPS gain reaches 2.4%.

Table 1

Among them, the test results based on model B are shown in Table 2 below. The noise pressure in the hard disk slot is reduced by about 1dB, the IOPS performance is improved from 87.3% to 90.2%, and the IOPS gain reaches 2.9%.

Table 2

Further, the noise reduction layer 13 is far from the surface of the base plate 123 , and can be fitted with a sound absorbing material or a sound insulating material.

In addition, in this embodiment, a noise reduction layer with multiple layers spaced apart can also be used, such as but not limited to the double-layer structure provided in the following embodiment 2, which can also obtain the above sound insulation effect.

Embodiment 2

Compared with the first embodiment, the noise reduction layer 13 fixed on the substrate body 123 in this embodiment has a double-layer structure. Please refer to the schematic diagrams of the hard disk tray shown in Figure 7 and Figure 8. In order to clearly show the difference and connection between this solution and the first embodiment, the same functional structures or structures in the figures are indicated by the same symbols. The structure of the main body of the hard disk tray 12 and the function principle of the noise reduction layer 13 in this embodiment are similar to those in the aforementioned FIGS. 4 to 6 , and will not be repeated here.

In this embodiment, there is a predetermined interval T between the two layers of noise reduction layers 13, and an air layer between the layers is formed based on the predetermined interval T, which is also in non-complete rigid contact with the substrate body 123, so that the stiffness of the sound bridge can be reduced. technical effect.

Specifically, the two layers of noise reduction layers 13 are fixedly connected by connecting members 131 to maintain the predetermined interval T. As shown in FIG.

In a specific application, the noise reduction layer 13 can also be configured as multiple layers (not shown in the figure), and there is a predetermined interval T between two adjacent noise reduction layers 13 . The vibration level decreases, which can further improve the sound insulation effect.

Embodiment 3

Compared with the second embodiment, the present embodiment also adopts the structure of the double-layer noise reduction layer 13 with a predetermined interval T. As shown in FIG. Please refer to the schematic diagrams of the hard disk tray shown in Figure 9 and Figure 10. In order to clearly show the difference and connection between this scheme and the second embodiment, the same functional structure or structure in the figure is indicated by the same mark. The structure of the main body of the hard disk tray 12 and the function principle of the noise reduction layer 13 in this embodiment are similar to those in the aforementioned FIGS. 4 to 6 , and will not be repeated here.

In this embodiment, viscoelastic damping material, such as but not limited to asphalt, water-soluble, latex or epoxy resin, is filled between the two noise reduction layers 13 with a predetermined interval T, preferably latex or epoxy resin. In addition, in this embodiment, a sound absorbing material can also be filled between the two noise reduction layers 13 with a predetermined interval T. For filling of viscoelastic damping material or sound-absorbing material, a first-stage sound-absorbing structure is added on the basis of the solution provided in the second embodiment, and a multi-stage sound-absorbing system is constructed and combined to combine sound absorption and sound insulation, and the effect is better. .

Based on this embodiment, after the double-layer noise reduction layer 13 is arranged on the hard disk tray and filled with sound-absorbing materials, the test results obtained under the same test conditions as the original hard disk tray scheme show that the noise in the hard disk slot is reduced. 3dB, the hard disk IOPS performance is improved by a maximum of 9%.

Based on the first embodiment, the second embodiment and the third embodiment, when the inner surfaces of the two side plates 122 of the horizontally-inserted hard disk tray 12 are covered with the noise reduction layer, it is also preferable to use a non-complete rigid contact with the corresponding side plates 122. connection to reduce bridge stiffness.

Of course, based on the first embodiment, the second embodiment and the third embodiment, the outer surfaces of the base plate 123 and the two side plates 122 of the horizontally-inserted hard disk tray 12 can also be covered with the noise reduction layer, which can also reduce power consumption. Can sound insulation. In specific applications, combined with the actual situation of the anti-noise requirements and space margins of specific products, the inner and outer surfaces of the base plate 123 and the two side plates 122 of the horizontally-inserted hard disk tray 12 can also be covered at the same time. the noise reduction layer.

Embodiment 4

As shown in FIG. 11 , the hard disk assembly 10 ′ provided in this embodiment is of a vertical insertion type, and the hard disk 11 ′ is placed in the hard disk cavity space formed inside the hard disk bracket 12 ′. During assembly, the hard disk assembly 10' is inserted into the server housing 20' along the third direction Z (vertical direction), and is designed according to the actual product type, along the first direction X (left and right direction) and the second direction Y (front and rear direction). direction) array configuration, please refer to FIG. 12 together, which shows a top view of the hard disk vertical-insertion server provided in this embodiment. Along the second direction Y, the cooling fan 30' is located inside the hard disk assembly 10'.

In this embodiment, the sound absorbing layer 13 ′ for absorbing the sound energy formed by the loading of sound waves can be covered on the body of the hard disk tray 12 ′. The hard disk bracket 12' of the vertically inserted hard disk assembly includes a handle bar 121' and two side plates 122' fixed at both ends of the handle bar 121' to enclose and form an open hard disk accommodating space. Specifically, the sound absorbing layer 13' may cover the inner surface and/or the outer surface of the handle bar 121' and/or the two side panels 122'.

Preferably, the noise reduction layer 13 ′ is disposed on the side adjacent to the hard disk bracket 12 ′ and the cooling fan 30 ′, that is, the side facing the cooling fan 30 ′, which has the best noise reduction efficiency. Please refer to the schematic diagram of the vertically-inserted hard disk tray shown in FIG. 13 . One side plate 122 ′ of the bracket body is facing the side of the cooling fan 30 ′, and the inner surface of the side plate 122 ′ is covered with a cooling fan 30 ′. The noise-reducing layer 13 ′ covers the non-sound-receiving side of the side plate 122 ′ of the hard disk tray relative to the cooling fan 30 ′.

In this embodiment, the thickness of the noise reduction layer 13 ′ needs to take into account the assembly gap between the hard disk bracket 12 ′ and the hard disk 11 ′. For example, but not limited to, the thickness of the noise reduction layer 13 ′ can be 0.1 mm to improve the anti-noise capability of the hard disk. At the same time, it does not affect the main structure design of the current product.

The same as in the first embodiment, the outer dimension and shape of the noise reduction layer 13' is preferably the same as the outer dimension and shape of the side directly opposite the horizontally inserted hard disk tray 10' and the cooling fan 30', so that in the second The direction Y covers the hard disk 11', using this area to maximize the noise immunity. The noise reduction layer 13 ′ can be a metal sheet-like structure, such as but not limited to aluminum foil or copper foil; or can also be a non-metal sheet-like structure, such as but not limited to general-purpose plastics, engineering plastics, or special plastics.

In order to reduce the stiffness of the sound bridge between the noise reduction layer 13' and the side plate 122', a non-complete rigid contact connection is used between the noise reduction layer 13' and the side plate 122' of the hard disk tray, so as to reduce the effect of the sound bridge F on sound insulation effect. As a result, loss occurs due to vibration transmission. Specifically, the noise reduction layer 13 ′ can be fixed on the side plate 122 ′ by using an adhesive, and the cured adhesive has a certain elasticity. On this basis, the noise reduction layer 13 ′ can be made of metal foil or non-metallic A sheet-like structure that forms a non-fully rigid contact connection that reduces the stiffness of the sound bridge.

Based on the fourth embodiment, the inner surface of the other side plate 122 ′ of the vertically inserted hard disk tray 12 ′ can also be covered with the noise reduction layer, which can also achieve the effect of overall energy consumption and sound insulation. In specific applications, combined with the actual situation of the anti-noise requirements and space margins of specific products, the inner and outer surfaces of the two side plates 122 ′ and the handle strip 121 ′ of the vertically-inserted hard disk tray 12 ′ can also be used. At the same time, the noise reduction layer is covered.

In the above embodiment, the noise reduction layer is arranged on the hard disk bracket, and the noise reduction layer may also be arranged on the hard disk. For example but not limited to the following Embodiment 5 and Embodiment 6.

Embodiment 5

As shown in FIG. 14 , the upper surface and the left side of the hard disk 11a of this embodiment are respectively covered with noise reduction layers 13a. The outer surface of the hard disk 11a is covered with a noise reduction layer 13a, which has a direct and effective noise reduction and sound insulation effect, and is relatively less difficult to manufacture and assemble.

It should be understood that the configuration of the noise reduction layer 13a shown in the figure is only a preferred exemplary illustration. In practical applications, the noise reduction layer 13a can cover at least one surface of the hard disk 11a casing, and can be selectively installed according to the design requirements of specific products.

Embodiment 6

As shown in FIG. 15, the left side of the hard disk 11b is covered with a noise reduction layer 13b, and in the projection plane parallel to the noise reduction layer 13b, the outer edge of the noise reduction layer 13b is located on the outer side of the hard disk 11b. outside. Please also refer to FIG. 16 , which is a view from the direction I of FIG. 15 . The noise reduction layer 13b has a portion beyond the surface of the hard disk 11b.

In this way, when the sound wave reaches the excess part of the noise reduction layer 13b, its diffraction path can form an acoustic shadow area J in the adjacent area of the hard disk 11b and the noise reduction layer 13b, and the noise of the acoustic shadow area J is significantly lower than that of other areas. And the higher the sound frequency, the larger the sound shadow area. On the basis of the reflection energy consumption and transmission vibration energy consumption of the noise reduction layer 13b, the influence of noise on the IOPS of the hard disk can be further reduced based on the acoustic shadow area J.

In practical applications, at least one edge of the outer contour of the noise reduction layer 13b is located outside the outer contour of the hard disk 11b, that is, the influence of noise can be reduced based on the formed acoustic shadow area. In addition, the noise reduction layer 13b can cover multiple surfaces of the hard disk 11b, instead of being limited to cover one surface of the hard disk 11b as shown in the figure, and can maximize the noise reduction efficiency according to different product design requirements.

Of course, the hard disks described in Embodiments 5 and 6 can be applied to a horizontally-inserted hard disk assembly, and can also be applied to a vertically-inserted hard disk assembly. In order to clearly illustrate the relative position of the noise reduction layer with respect to the hard disk, FIG. 14 and FIG. 15 do not show installation structures such as the hard disk bracket.

An embodiment of the present application further provides a server, the server includes a hard disk assembly arranged in an array in a server housing, and the hard disk assembly may be the hard disk assembly described in the foregoing FIG. 2 to FIG. 15 .

It can be determined that based on the frame design of the high-density server, the spatial layout of the components is relatively compact. This embodiment adopts the server solution of the aforementioned hard disk assembly, and uses the hard disk bracket and the hard disk structure to provide an anti-noise treatment method, without affecting the air volume of the cooling fan. It does not occupy space for wiring and fan mixing, and achieves the effect of improving the anti-noise capability of the hard disk.

Claims

A hard disk assembly, comprising: a noise reduction layer, a hard disk bracket, and a hard disk disposed on the hard disk bracket;

The noise reduction layer is covered on the hard disk or the hard disk bracket, and is located between the noise source and the hard disk;

The noise reduction layer is used for reducing the noise transmitted to the hard disk.
The hard disk assembly according to claim 1, wherein the material of the noise reduction layer is different from the material of the hard disk housing or the hard disk bracket.
The hard disk assembly according to claim 1 or 2, wherein the thickness of the noise reduction layer is different from the thickness of the hard disk casing or the hard disk tray.
The hard disk assembly of claim 3, wherein the noise reduction layer covers a side of the hard disk or the hard disk tray adjacent to the noise source.
The hard disk assembly according to claim 3, wherein the hard disk bracket comprises: a handle bar and two side panels, wherein the two side panels are respectively fixedly connected to both ends of the handle bar to enclose the handle bar. Synthesized into an open hard disk storage space;

The covering on the hard disk tray specifically includes: covering the open position and/or the surface of at least one of the two side panels.
The hard disk assembly according to claim 5, wherein the opening of the hard disk bracket comprises a base plate, and two sides of the base plate are fixedly connected to the two side plates respectively;

The covering on the opening position is specifically covering the surface of the base plate.
The hard disk assembly according to claim 1, wherein the noise reduction layer and the hard disk bracket or the hard disk are connected by means of gluing, partial clamping, screw fastening or riveting.
The hard disk assembly according to claim 3, wherein the covering on the hard disk specifically comprises covering at least one surface of a casing of the hard disk.
The hard disk assembly according to claim 8, wherein in a projection plane parallel to the noise reduction layer, at least one edge of the outer contour of the noise reduction layer is located outside the outer contour of the hard disk.
The hard disk assembly according to claim 1, wherein the noise reduction layer is made of aluminum foil or copper foil, or made of general-purpose plastics, engineering plastics, or special plastics.
The hard disk assembly according to claim 10, wherein the noise reduction layer is a sheet-like structure with a thickness of 0.1 mm˜2 mm.
The hard disk assembly according to claim 10 or 11, wherein the noise reduction layer is arranged in a multi-layer structure, and there is an interval between two adjacent layers of the noise reduction layer.
The hard disk assembly according to claim 12, wherein the space is filled with viscoelastic damping material or sound absorbing material.
The hard disk assembly according to claim 10 or 11, wherein a sound-absorbing material or a sound-insulating material is attached to a surface of the noise reduction layer away from the component body.
A hard disk bracket, characterized in that the hard disk bracket has a hard disk accommodating space for disposing a hard disk, the hard disk bracket is covered with a noise reduction layer, and the noise reduction layer is used to reduce the noise transmitted to the hard disk. .
The hard disk tray of claim 15, wherein the material of the noise reduction layer is different from the material of the hard disk tray.
The hard disk tray according to claim 15 or 16, wherein the thickness of the noise reduction layer is different from the thickness of the hard disk casing or the hard disk tray.
The hard disk tray according to claim 17, wherein the hard disk tray comprises: a handle bar and two side panels, wherein the two side panels are respectively fixedly connected to both ends of the handle bar, so as to Enclosed to form an open hard disk accommodation space;

The covering on the hard disk tray specifically includes: covering the open position and/or the surface of at least one of the two side panels.
The hard disk tray according to claim 18, wherein the opening of the hard disk tray comprises a base plate, and two sides of the base plate are fixedly connected to the two side panels respectively;

The covering on the opening position is specifically covering the surface of the base plate.
A server is characterized in that it comprises a hard disk assembly arranged in an array in a server casing, and the hard disk assembly adopts the hard disk assembly according to any one of claims 1 to 14 .