Fan module and server

Abstract

The invention discloses a fan module and a server, relates to the technical field of servers, and aims to improve the damping effect of the fan module. The fan module comprises a stator, a rotor and a winding fixing device. The rotor is arranged in the stator and comprises a rotating shaft, bearings arranged at the two ends of the rotating shaft and first magnets arranged on the bearings. The bearing is arranged on the winding fixing device, the winding fixing device comprises a second magnet, and the same polarity of the second magnet and the first magnet is close to each other, so that the rotor is suspended.

Description

Technical Field

[0001] The present application relates to the field of server technology, and in particular to a fan module and a server. Background Art

[0002] In an air-cooled server, a fan module is usually used to dissipate heat from components inside the server.

[0003] However, the rotation of the fan module generates mechanical vibration. When the server system is heavily loaded, components like the CPU (central processing unit) generate a lot of heat, resulting in high fan speeds and high vibration. This vibration is transmitted through the connecting devices to the chassis and components, affecting component performance. To mitigate this impact, related technologies have adopted vibration reduction methods such as adjusting the fan position or adding buffer devices, but this compromises layout or increases costs. Summary of the Invention

[0004] The present application provides a fan module and a server, aiming to improve the vibration reduction effect of the fan module.

[0005] In one aspect, embodiments of the present application provide a fan module comprising a stator, a rotor, and a winding fixture. The rotor is disposed within the stator and includes a rotating shaft, bearings disposed at both ends of the rotating shaft, and a first magnet disposed on the bearings. The bearings are disposed on the winding fixture, which includes a second magnet having the same polarity as the first magnet and positioned adjacent to the first magnet to suspend the rotor.

[0006] In the above-mentioned embodiment of the present application, the fan module includes a stator, a rotor, and a winding fixture. The rotor is disposed within the stator and can rotate to generate airflow, allowing the fan module to be used for wind-powered heat dissipation. The rotor includes a rotating shaft, bearings disposed at both ends of the rotating shaft, and a first magnet disposed on the bearings. The bearings are disposed on the winding fixture, and the winding fixture includes a second magnet. The second magnet has the same polarity as the first magnet and is close to the first magnet, so that a repulsive force is generated between the second magnet and the first magnet, thereby causing the rotor to be suspended.

[0007] It is understandable that when the rotor rotates, it will generate mechanical vibration. A repulsive force exists between the first magnet mounted on the rotor bearing and the second magnet mounted on the winding fixture. This repulsive force causes the bearing to float in the air, and thus the rotor as well. This means there is no mechanical contact between the rotor and stator, thus suppressing the transmission of mechanical vibration generated by the rotor's rotation and confining it to the rotor itself, thereby improving the fan module's vibration reduction effect.

[0008] In some embodiments, along a reference plane perpendicular to the rotation axis, the second magnet includes a U-shaped groove, and the first magnet is disposed in the U-shaped groove of the second magnet.

[0009] In some embodiments, along a first direction perpendicular to the rotation axis, the bearing includes a first surface and a second surface relative to each other. Along a second direction perpendicular to the rotation axis, the bearing includes a third surface and a fourth surface relative to each other, and the second direction intersects the first direction. The first magnet includes a first portion disposed on the first surface, a second portion disposed on the second surface, and a third portion disposed on the third surface. Along the first direction, the second magnet includes a fourth portion and a fifth portion relative to each other, and the second magnet also includes a sixth portion connecting the fourth portion and the fifth portion. The first portion is disposed opposite the fourth portion, the second portion is disposed opposite the fifth portion, and the third portion is disposed opposite the sixth portion.

[0010] In some embodiments, the winding fixing device further includes a support rod connected to the sixth part, and the support rod is used to support the second magnet.

[0011] In some embodiments, the stator includes a fan frame base, and the support rod is fixedly connected to the fan frame base.

[0012] In some embodiments, the first, second and third parts are all ferrite sheet magnets, or the fourth, fifth and sixth parts are all ferrite sheet magnets, or the first, second, third, fourth, fifth and sixth parts are all ferrite sheet magnets.

[0013] In some embodiments, the rotor further comprises a fan blade outer frame and fan blades, wherein the fan blade outer frame is cylindrical and the fan blades are embedded in the fan blade outer frame. The rotating shaft is fixedly connected to the fan blade outer frame to drive the fan blade outer frame and the fan blades to rotate.

[0014] In some embodiments, the rotor further includes a three-phase winding coil, which is embedded in the inner wall of the fan blade outer frame.

[0015] In some embodiments, the stator includes a fan frame housing, which is cylindrical, and an inner diameter of the fan frame housing is greater than an outer diameter of the fan blade outer frame.

[0016] In some embodiments, the stator further includes a three-phase winding coil, and the three-phase winding coil of the stator is embedded in the inner wall of the fan frame housing.

[0017] In some embodiments, the three-phase winding coil of the rotor is a closed coil, and the three-phase winding coil of the stator is powered. The three-phase winding coil of the stator is used to generate a force on the three-phase winding coil of the rotor to drive the rotor to rotate.

[0018] In some embodiments, the stator further includes a fan frame base, and the fan frame housing is fixedly connected to the fan frame base.

[0019] On the other hand, an embodiment of the present application further provides a server, which includes a mainboard and a fan module as in any of the above embodiments, wherein the fan module is arranged on the mainboard.

[0020] In some embodiments, the server further includes a clip, and the fan frame base of the fan module is connected to the mainboard via the clip.

[0021] In some embodiments, the server further includes a fan connector, and the three-phase winding coil of the stator is electrically connected to the mainboard through the fan connector.

[0022] The above server has the same structure and beneficial technical effects as the fan modules provided in some of the above embodiments, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 A schematic structural diagram of a fan module provided in an embodiment of the present application; Figure 2 for Figure 1 A partial enlarged side view of the fan module at position M; Figure 3 for Figure 1 A schematic structural diagram of a rotor of a fan module; Figure 4 for Figure 3 Schematic diagram of the partial structure of the rotor; Figure 5 for Figure 3 A side view of the rotor in FIG; Figure 6 for Figure 1 A side view of the fan frame housing and fan blade outer frame of the fan module; Figure 7 for Figure 1 A schematic structural diagram of the stator of the fan module; Figure 8 for Figure 7 Schematic diagram of the magnetic field generated when the three-phase winding coils of the stator are energized; Figure 9 A schematic diagram of the structure of the server provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0026] It should be noted that, in the description of this application, the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. The terms "first," "second," etc., in this application are used to distinguish similar objects, and are not used to describe a particular order or sequence.

[0027] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0028] In related technologies, the cooling system of air-cooled servers is typically implemented using a fan module. A fan module consists of a fan frame, a fan body, and some fasteners (such as plastic pins). The fan is typically powered by 12V DC and uses PWM (pulse width modulation) for speed control. It is placed inside the fan frame.

[0029] However, fan rotation generates mechanical vibrations that can significantly impact the performance of mechanical hard drives, especially under heavy system load. Core components like the CPU (central processing unit) generate significant heat, leading to higher fan speeds and greater mechanical vibrations, significantly impacting hard drive performance. To mitigate the impact of fan vibrations on mechanical hard drives, system designers often resort to compromises, such as adjusting the fan's position to increase the distance from the fan to the hard drive or adding buffering devices. However, these approaches come at the expense of optimal layout or cost.

[0030] However, due to the rotation of the fan blades and the friction between the blades and the air, the fan generates strong vibrations during operation. This vibration is transmitted through the connection between the fan frame and the chassis to the chassis and other components inside the chassis, such as the hard drive. This vibration transmission can cause a series of problems.

[0031] These vibrations are transmitted through the fan frame to various components within the server, affecting their operation. Specifically, taking a mechanical hard drive as an example, when mechanical vibration is present, its performance is significantly affected. This can manifest as: seek times increasing by 20% to 50%, data transfer rates decreasing by 10% to 30%, and the error rate per million bits of data increasing from the normal 10-12 to 10-9 or even higher.

[0032] Besides affecting component operation, fan vibration presents another problem: the fan is fixed inside the server, and these vibrations can be transmitted to key integrated circuits (ICs) outside the fan, reducing their reliability.

[0033] To solve the above problems, embodiments of the present application provide a fan module and a server.

[0034] On the one hand, an embodiment of the present application provides a fan module, Figure 1 A schematic structural diagram of a fan module provided in an embodiment of the present application.

[0035] See also Figure 1 The fan module 10 includes a stator 1, a rotor 2, and a winding fixing device 3. For example, the fan module 10 can be fixedly arranged inside the server to provide wind cooling for components inside the server.

[0036] For example, the fan module 10 can be fixed to the rear window of a server chassis to absorb air and dissipate heat throughout the chassis, where heat-generating components such as a motherboard, memory, and power supply are located. It is understood that the fan module 10 draws air from the rear window of the chassis, and the airflow passes through the internal components and is discharged from the front window, forming a "rear-intake, front-out" air duct.

[0037] For example, the fan module 10 can also be fixed to the front window of a server chassis to absorb and dissipate heat throughout the chassis, where high-heat-generating components such as the CPU (central processing unit), memory, and hard disk are located. As can be understood, the fan module 10 blows air toward the front window, with the airflow directly impacting the high-heat-generating components, and the hot air is exhausted through the rear window, creating a "front-to-back" air duct. Installing the fan module 10 on the front window of a server chassis can enhance heat dissipation for core components such as the CPU and reduce local temperature peaks.

[0038] For example, the fan module 10 can also be fixed to the CPU heat sink of a server to directly cool the core components of the server. It is understood that the fan module 10 can be integrated with the CPU heat sink to accelerate heat exchange through forced convection, directly reducing the CPU temperature. This configuration can effectively solve the problem of high CPU power consumption and heat dissipation, and is suitable for high-performance scenarios such as overclocking.

[0039] For example, the fan module 10 can also be fixed to the side panel or expansion slot of the server chassis to assist in cooling heat-generating components such as memory, expansion cards, and hard drives. It is understood that the fan module 10 is installed near the side panel or expansion slot to assist in heat dissipation through lateral airflow, enhance air circulation within the chassis, reduce the overall temperature within the chassis, and alleviate local airflow dead spots. The above-mentioned installation location of the fan module 10 is suitable for high-density storage or computing nodes, and is used to improve the stability of the server system.

[0040] For example, the fan module 10 can also be fixed to the modular heat sink of the server to cooperate with multiple components inside the server to dissipate heat. It is understandable that the fan module 10 is integrated into the modular heat sink of the server, and the removable design enables rapid maintenance or upgrades to support different cooling requirements.

[0041] Continue to see Figure 1 The rotor 2 is disposed within the stator 1 and can rotate to generate airflow. The airflow flows along opposite sides of the rotor 2 in a direction X. The rotor 2 includes a rotating shaft 21, bearings 22 disposed at both ends of the rotating shaft 21, and first magnets 23 disposed on the bearings 22. The rotor 2 rotates driven by the rotating shaft 21.

[0042] Exemplarily, a bearing 22 is provided at each end of the rotating shaft 21. The bearing 22 includes a nested inner shaft and an outer shaft, the outer shaft is located outside the inner shaft, the inner shaft is connected to the rotating shaft 21, and the inner shaft can rotate freely compared to the outer shaft.

[0043] The bearing 22 is mounted on the winding fixture 3, which includes a second magnet 31. The second magnet 31 is positioned adjacent to the first magnet 23, ensuring that the rotor 2 is suspended. It is understood that the areas at either end of a magnet with the strongest magnetic properties are called poles. Both the first magnet 23 and the second magnet 31 have south and north poles located on their end faces. The second magnet 31 is positioned adjacent to the first magnet 23, ensuring that the poles of the first and second magnets 23 and 31 are positioned adjacent to each other.

[0044] For example, the N pole of the first magnet 23 and the N pole of the second magnet 31 are set in a close position, and the S pole of the first magnet 23 and the S pole of the second magnet 31 are set in a close position, so that a repulsive force is generated between the first magnet 23 and the second magnet 31, thereby achieving the suspension of the bearing 22 and then the suspension of the rotor 2.

[0045] In the above embodiment of the present application, the fan module 10 includes a stator 1, a rotor 2, and a winding fixing device 3. The rotor 2 is arranged in the stator 1, and the rotor 2 can rotate to generate airflow, so that the fan module 10 is used for wind heat dissipation. The rotor 2 includes a rotating shaft 21, bearings 22 arranged at both ends of the rotating shaft 21, and a first magnet 23 arranged on the bearing 22. The bearing 22 is arranged on the winding fixing device 3, and the winding fixing device 3 includes a second magnet 31. The second magnet 31 has the same polarity as the first magnet 23 and is close to each other, so that a repulsive force is generated between the second magnet 31 and the first magnet 23, thereby causing the rotor 2 to be suspended.

[0046] It is understandable that when the rotor 2 rotates, it will generate mechanical vibration. A repulsive force exists between the first magnet 23 provided on the bearing 22 of the rotor 2 and the second magnet 31 provided on the winding fixture 3. This repulsive force causes the bearing 22 to float in the air, thereby also causing the rotor 2 to float in the air. This means there is no mechanical contact between the rotor 2 and the stator 1. This suppresses the transmission of the mechanical vibration generated by the rotation of the rotor 2, confining it to the interior of the rotor 2 and improving the vibration reduction effect of the fan module 10.

[0047] In some embodiments, see Figure 1 Along a reference plane (plane YZ) perpendicular to the rotation axis 21, the second magnet 31 includes a U-shaped groove. The first magnet 23 is disposed within the U-shaped groove of the second magnet 31. The U-shaped groove of the second magnet 31 can generate a force against the bearing 22 of the rotor 2, thereby providing a lifting force for the bearing 22 and confining the bearing 22 within the second magnet 31, thereby enabling the rotor 2 to rotate in mid-air.

[0048] Specifically, by setting the second magnet 31 as a U-shaped groove, the N pole and S pole of the second magnet 31 are respectively located at the two ends of the U shape, forming an "open relative" repulsive layout, and the two side arms of the U-shaped magnet form a closed magnetic circuit. The magnetic field lines are highly concentrated at the opening, thereby generating a strong magnetic force at the opening.

[0049] For example, along the plane direction of reference plane YZ, the bearing 22 is circular in shape, and the first magnet 23 is disposed outside the bearing 22. For example, the first magnet 23 may also be a U-shaped groove, with the bearing 22 embedded and fixed within the first magnet 23. The north pole and south pole of the first magnet 23 are also located at the two ends of the U-shape, and the magnetic field lines are highly concentrated at the opening.

[0050] The N pole of the first magnet 23 and the N pole of the second magnet 31 are set in close positions, and the S pole of the first magnet 23 and the S pole of the second magnet 31 are set in close positions, so that a strong repulsive force is generated between the first magnet 23 and the second magnet 31, thereby achieving the suspension of the bearing 22 and then the suspension of the rotor 2.

[0051] Furthermore, compared to parallel bar magnets, the U-shaped grooved second magnet 31 reduces the spread of the magnetic field, improving energy utilization. If the first magnet 23 is slightly offset, the repulsive force on one side of the U-shaped grooved second magnet 31 decreases while the force on the other side increases, creating a restoring torque that automatically returns the first magnet 23 to its original position. This improves the stability of the rotor 2's rotation and reduces the possibility of mechanical contact between the rotor 2 and other components of the fan module 10, thereby enhancing the vibration reduction effect of the fan module 10.

[0052] Exemplarily, the second magnet 31 can also be a semicircular groove, and the first magnet 23 is also a semicircular groove. Along the direction Z, the second magnet 31 is arranged on the lower side of the bearing 22, and the first magnet 23 is arranged on the upper side of the bearing 22. The N pole and S pole of the first magnet 23 are respectively arranged opposite to the N pole and S pole of the second magnet 31, so that the first magnet 23 is subjected to a vertical upward repulsive force, thereby causing the rotor 2 to be suspended.

[0053] Figure 2 for Figure 1 A partial enlarged side view of the fan module at position M.

[0054] In some embodiments, see Figure 2 Along a first direction Y perpendicular to the rotation axis 21, the bearing 22 includes a first surface 401 and a second surface 402 facing each other. Along a second direction Z perpendicular to the rotation axis 21, the bearing 22 includes a third surface 403 and a fourth surface 404 facing each other. The second direction Z intersects the first direction Y. The embodiment of the present application is described as an example in which the second direction Z is perpendicular to the first direction Y.

[0055] For example, along the plane direction of the reference plane YZ, the shape of the bearing 22 is circular, the first surface 401 and the second surface 402 can be the two ends of the diameter of the bearing 22 along the direction Y, and the third surface 403 and the fourth surface 404 can be the two ends of the diameter of the bearing 22 along the direction Z. It can be understood that Figure 2 In the figure, the “first surface 401 ” refers to the left side of the bearing 22 , the “second surface 402 ” refers to the right side of the bearing 22 , the “third surface 403 ” refers to the lower surface of the bearing 22 , and the “fourth surface 404 ” refers to the upper surface of the bearing 22 .

[0056] Continue to see Figure 2 The first magnet 23 includes a first portion 41 disposed on the first surface 401, a second portion 42 disposed on the second surface 402, and a third portion 43 disposed on the third surface 403. It is understood that the first surface 401, the second surface 402, and the third surface 403 of the bearing 22 are all in contact with the first magnet 23, and the outer shaft of the bearing 22 is tightly pressed and fixed to the first magnet 23.

[0057] Exemplarily, the first part 41, the second part 42 and the third part 43 can be connected as a whole, that is, the first magnet 23 is also a U-shaped groove, and the N pole and S pole of the first magnet 23 are respectively located at the end of the first part 41 and the second part 42 away from the third part 43, and the magnetic field lines are highly concentrated at the opening of the first magnet 23.

[0058] The N pole of the first magnet 23 and the N pole of the second magnet 31 are set in close positions, and the S pole of the first magnet 23 and the S pole of the second magnet 31 are set in close positions, so that a strong repulsive force is generated between the first magnet 23 and the second magnet 31, thereby achieving the suspension of the bearing 22 and then the suspension of the rotor 2.

[0059] For example, see Figure 2 The first portion 41, the second portion 42, and the third portion 43 are three magnets. The shapes of the three magnets can be any one or more of rectangular, circular, elliptical, or trapezoidal. This application does not limit the shapes of the first portion 41, the second portion 42, and the third portion 43. For ease of illustration, the embodiments of this application are illustrated by taking the first portion 41, the second portion 42, and the third portion 43 as an example in which the shapes are all rectangular.

[0060] Along the first direction Y, the second magnet 31 includes a fourth portion 44 and a fifth portion 45 facing each other. The second magnet 31 further includes a sixth portion 46 connecting the fourth portion 44 and the fifth portion 45 .

[0061] For example, see Figure 2 The fourth portion 44, the fifth portion 45, and the sixth portion 46 are three magnets. The shapes of the three magnets can be any one or more of rectangular, circular, elliptical, or trapezoidal. This application does not limit the shapes of the fourth portion 44, the fifth portion 45, and the sixth portion 46. For ease of illustration, the embodiment of this application is illustrated by taking the fourth portion 44 and the fifth portion 45 as parallelograms and the sixth portion 46 as a trapezoid as an example.

[0062] The first portion 41 is disposed opposite to the fourth portion 44 , the second portion 42 is disposed opposite to the fifth portion 45 , and the third portion 43 is disposed opposite to the sixth portion 46 .

[0063] It can be understood that the first part 41 and the fourth part 44 both include an N pole and an S pole. The N pole of the first part 41 and the N pole of the fourth part 44 are set in close positions, and the S pole of the first part 41 and the S pole of the fourth part 44 are set in close positions, so that the fourth part 44 gives the first part 41 a horizontal repulsive force F3 to the right.

[0064] Continue to see Figure 2The second part 42 and the fifth part 45 also include an N pole and an S pole. The N pole of the second part 42 and the N pole of the fifth part 45 are set in a close position, and the S pole of the second part 42 and the S pole of the fifth part 45 are set in a close position, so that the fifth part 45 gives the second part 42 a horizontal left repulsive force F2.

[0065] Among them, F3=F2, that is, the first part 41 and the second part 42 are respectively subjected to forces of equal magnitude and opposite directions in the horizontal direction, and these two forces act on the bearing 22, so that the bearing 22 can remain stable in the horizontal direction.

[0066] For example, when the bearing 22 is slightly offset in the horizontal direction (direction Y), F2 decreases and F3 increases, or F3 decreases and F2 increases. When F3 is not equal to F2, a restoring torque can be formed between the first magnet 23 and the second magnet 31, so that the bearing 22 automatically returns to the center after being offset in the horizontal direction, thereby improving the rotation stability of the rotor 2 and reducing the possibility of mechanical contact between the rotor 2 and other components of the fan module 10, thereby improving the shock absorption effect of the fan module 10.

[0067] Continue to see Figure 2 The third part 43 and the sixth part 46 also include an N pole and an S pole. The N pole of the third part 43 and the N pole of the sixth part 46 are set in a close position, and the S pole of the third part 43 and the S pole of the sixth part 46 are set in a close position, so that the sixth part 46 gives the third part 43 a vertical upward repulsive force F1.

[0068] The gravity of the rotor 2 itself is G. Under ideal conditions, F1=G, so that the rotor 2 can be suspended in the air under the action of F1.

[0069] For example, if bearing 22 experiences a slight vertical displacement (direction Z), F1 changes. For example, if bearing 22 deflects downward, F1 increases, and F1>G, causing the entire bearing 22 to experience an upward force, moving upward until F1=G, and the bearing 22 remains stably suspended. If bearing 22 deflects upward, F1 decreases, and F1<G, causing the entire bearing 22 to experience a downward force, moving downward until F1=G, and the bearing 22 remains stably suspended.

[0070] It can be understood that the repulsive force between the third part 43 and the sixth part 46 can cause the bearing 22 to automatically return to the center position after being offset in the vertical direction, thereby improving the rotation stability of the rotor 2, reducing the possibility of mechanical contact between the rotor 2 and other components of the fan module 10, and thereby improving the shock absorption effect of the fan module 10.

[0071] In some embodiments, see Figure 1 and Figure 2 The winding fixing device 3 further includes a support rod 32 connected to the sixth portion 46. The support rod 32 is used to support the second magnet 31. The two support rods 32 are respectively arranged on opposite sides of the stator 1. Along the direction Z, the two support rods 32 have the same height, thereby keeping the rotating shaft 21 horizontal, which is conducive to the stable rotation of the rotor 2.

[0072] For example, the support rod 32 can be in the shape of a cuboid, a cylinder, or any other arbitrary shape. The present application does not limit the shape of the support rod 32. For ease of explanation, the embodiments of the present application illustrate the support rod 32 as a cylinder. For example, the support rod 32 can be bonded to the sixth portion 46 via an adhesive layer, thereby supporting the second magnet 31.

[0073] In some embodiments, see Figure 1 The stator 1 includes a fan frame base 11, and the support rod 32 is fixedly connected to the fan frame base 11. For example, a groove can be provided on a side surface of the fan frame base 11 close to the stator, and the support rod 32 is plugged into the groove, thereby achieving a fixed connection between the support rod 32 and the fan frame base 11. Alternatively, an adhesive layer can be provided on a side surface of the support rod 32 close to the fan frame base 11, and the support rod 32 and the fan frame base 11 are bonded via the adhesive layer, thereby achieving a fixed connection between the support rod 32 and the fan frame base 11.

[0074] For example, along direction Z, the height of the two support rods 32 is less than half the height of the stator 1 and greater than half the height of the rotor 2. The second magnet 31 is fixed by the support rods 32, and the first magnet 23 is suspended in the air due to the repulsive force with the second magnet 31, thereby causing the rotor 2 to be suspended in the stator 1.

[0075] In some embodiments, see Figure 2 , the first portion 41, the second portion 42, and the third portion 43 are all ferrite sheet magnets. Alternatively, the fourth portion 44, the fifth portion 45, and the sixth portion 46 are all ferrite sheet magnets. Alternatively, the first portion 41, the second portion 42, the third portion 43, the fourth portion 44, the fifth portion 45, and the sixth portion 46 are all ferrite sheet magnets.

[0076] Due to the high resistivity of ferrite sheet magnets, eddy current losses at high frequencies are significantly lower than those of metal cores, improving circuit efficiency and offering excellent high-frequency performance. Furthermore, their high magnetic permeability allows them to achieve high inductance values ​​within a relatively small volume, facilitating the thinning and lightweighting of the second magnet 31. Furthermore, ferrite sheet magnets maintain stable performance within a temperature range of -40°C to 200°C, demonstrating strong temperature stability and adaptability to even more extreme environments.

[0077] Exemplarily, the materials of the first magnet 23 and the second magnet 31 may also be any one or more of permanent magnetic materials or soft magnetic materials.

[0078] For example, the material of the first magnet 23 and the second magnet 31 can be any one or more permanent magnetic materials. Permanent magnetic materials can maintain magnetism for a long time. Permanent magnetic materials include neodymium iron boron magnets, ferrite magnets, samarium cobalt magnets, alnico magnets, etc. Neodymium iron boron magnets have extremely strong magnetic properties. Ferrite magnets are made of SrO or BaO and Fe2O3 as raw materials and are manufactured through ceramic technology. They are not easy to demagnetize, corrosion-resistant, and inexpensive. Samarium cobalt magnets are rare earth permanent magnetic materials with high magnetic energy product and coercive force, low temperature coefficient, and a maximum operating temperature of 350°C. Alnico magnets are composed of elements such as aluminum, nickel, and cobalt. They have good machinability and high temperature resistance. Their operating temperature can reach 600°C.

[0079] For example, the materials of the first magnet 23 and the second magnet 31 can be any one or more of soft magnetic materials. Soft magnetic materials have short-term or variable magnetism. Soft magnetic materials include ferrite soft magnetic materials, silicon steel, iron-nickel alloys, etc. Ferrite soft magnetic materials have high magnetic permeability, low loss, good temperature stability, and high resistivity (10 5 Ω·cm~10 9 Ω·cm), which can suppress eddy current losses. Silicon steel, an iron alloy with a high silicon content, has good magnetic conductivity and low iron loss. Iron-nickel alloys have high magnetic permeability, low coercivity, high resistivity, and low high-frequency eddy current losses.

[0080] Figure 3 for Figure 1 A schematic structural diagram of a rotor of a fan module; Figure 4 for Figure 3 Schematic diagram of the partial structure of the rotor.

[0081] In some embodiments, see Figure 3 and Figure 4 The rotor 2 also includes a blade frame 24 and blades 25. The blade frame 24 is cylindrical. It is understood that the blade frame 24 includes two circular side surfaces and has a certain thickness. The side surfaces have an inner diameter R. The blades 25 are embedded in the blade frame 24 and can generate wind during the rotation of the rotor 2. The rotating shaft 21 is fixedly connected to the blade frame 24 to drive the blade frame 24 and the blades 25 to rotate.

[0082] Exemplarily, the rotor 2 includes at least two blades 25 , and the number of blades can be two, three, or four, etc. The embodiment of the present application is illustrated by taking the rotor 2 including three blades 25 as an example.

[0083] For example, see Figure 4The rotor 2 further includes fixing members 20 disposed on two opposing sides of the blade outer frame 24, and the positions of the fixing members 20 may coincide with the diameter of the side surfaces. For example, at least one fixing member 20 may be disposed on one side of the blade outer frame 24, and the rotating shaft 21 may be fixedly connected to the blade outer frame 24 via the fixing members 20.

[0084] Understandably, see Figure 4 The length L of the fan blade 25 is equal to the inner diameter R of the fan blade outer frame 24. One end of the fan blade 25 is fixedly connected to the rotating shaft 21, and the other end is connected to the inner side of the fan blade outer frame 24. Exemplarily, the fan blade 25 and the rotating shaft 21, as well as the fan blade 25 and the inner side of the fan blade outer frame 24 can be fixed by an adhesive layer. The fan blade 25 and the rotating shaft 21 are fixed inside the fan blade outer frame 24. When the rotating shaft 21 rotates, the rotating shaft 21 drives the fan blade 25 and the fan blade outer frame 24 to rotate together to generate the wind force required for heat dissipation.

[0085] Figure 5 for Figure 3 Side view of the rotor in.

[0086] In some embodiments, see Figure 3 and Figure 5 The rotor 2 further includes a rotor three-phase winding coil 26, which is embedded in the inner wall of the blade outer frame 24. The rotor three-phase winding coil 26 can generate rotational power under the action of the rotating magnetic field, thereby realizing the rotation of the rotor 2.

[0087] Exemplarily, the rotor three-phase winding coil 26 includes a first-phase rotor coil 261, a second-phase rotor coil 262, and a third-phase rotor coil 263. The first-phase rotor coil 261, the second-phase rotor coil 262, and the third-phase rotor coil 263 are spaced 120 degrees apart. It is understood that Figure 5 In the embodiment, the included angles between the adjacent first-phase rotor coil 261 and the second-phase rotor coil 262 , the adjacent second-phase rotor coil 262 and the third-phase rotor coil 263 , and the adjacent third-phase rotor coil 263 and the first-phase rotor coil 261 are all 60°.

[0088] Figure 6 for Figure 1 Side view of the fan frame housing and fan blade frame of the fan module.

[0089] In some embodiments, see Figure 1 The stator 1 includes a fan frame housing 12, which is cylindrical, and the blade outer frame 24 of the rotor 2 is also cylindrical. Figure 6 The fan blade outer frame 24 and the fan frame housing 12 both have a certain thickness, and therefore both have an inner diameter and an outer diameter. The inner diameter R1 of the fan frame housing 12 is greater than the outer diameter R2 of the fan blade outer frame 24.

[0090] It is understood that the fan blade outer frame 24 is disposed inside the fan frame housing 12, and the fan blade outer frame 24 has no mechanical contact with the fan frame housing 12. When the rotor 2 rotates, since the fan blade outer frame 24 has no mechanical contact with the fan frame housing 12, the mechanical vibration generated by the rotation of the rotor 2 will not be transmitted to the stator 1, thereby improving the vibration reduction effect of the fan module 10.

[0091] Figure 7 for Figure 1 Schematic diagram of the structure of the stator of the fan module.

[0092] In some embodiments, see Figure 7 The stator 1 further includes a stator three-phase winding coil 13, which is embedded in the inner wall of the fan frame housing 12. The stator three-phase winding coil 13 can generate a rotating magnetic field after being connected to an external power supply.

[0093] For example, the stator three-phase winding coil 13 includes a first-phase stator coil 131, a second-phase stator coil 132, and a third-phase stator coil 133. The first-phase stator coil 131, the second-phase stator coil 132, and the third-phase stator coil 133 are spaced 120 degrees apart. Figure 7 In the embodiment, the included angles between the adjacent first-phase stator coil 131 and the second-phase stator coil 132 , the adjacent second-phase stator coil 132 and the third-phase stator coil 133 , and the adjacent third-phase stator coil 133 and the first-phase stator coil 131 are all 60°.

[0094] For example, the stator 1 may also include a single-phase winding coil, a two-phase winding coil, a multi-phase winding coil, or a DC winding coil.

[0095] For example, single-phase AC power can be used to power the windings of stator 1, which can include a main winding (running winding) and a secondary winding (starting winding). The secondary winding is connected in series with a capacitor or resistor and then in parallel with the main winding, generating a rotating magnetic field by utilizing the phase difference.

[0096] For example, the stator 1 may also be provided with two sets of windings that are spaced 90 degrees apart in electrical angle, and two-phase alternating current is respectively supplied to the two sets of windings to directly generate a rotating magnetic field.

[0097] For example, the number of winding phases of the stator 1 can be increased (such as six phases or twelve phases), and the spatial distribution of the winding of each phase is denser, which can reduce the harmonic content and improve the magnetic field waveform.

[0098] For example, a DC power supply can be used in conjunction with an inverter to convert DC power into AC power before supplying it to the windings of stator 1. In this case, the winding design of stator 1 can be flexibly adjusted (e.g., three-phase, two-phase, etc.).

[0099] In some embodiments, see Figure 5 and Figure 7 The rotor three-phase winding coil 26 of the rotor 2 is a closed coil, and the stator three-phase winding coil 13 of the stator 1 is powered. The three-phase winding coil of the stator 1 is used to generate a force on the three-phase winding coil of the rotor 2 to drive the rotor 2 to rotate.

[0100] Exemplarily, the first-phase rotor coil 261, the second-phase rotor coil 262, and the third-phase rotor coil 263 are all closed coils, and the first-phase stator coil 131, the second-phase stator coil 132, and the third-phase stator coil 133 can all be connected to electricity via lead wires. For example, the first-phase stator coil 131 can be led out of the fan frame base 11 via a first lead wire 131a, the second-phase stator coil 132 can be led out of the fan frame base 11 via a second lead wire 132a, and the third-phase stator coil 133 can be led out of the fan frame base 11 via a third lead wire 133a.

[0101] Figure 8 for Figure 7 Schematic diagram of the magnetic field generated when the three-phase winding coils of the stator are energized.

[0102] See also Figure 8 The first-phase stator coil 131, the second-phase stator coil 132 and the third-phase stator coil 133 can be respectively connected to three-phase alternating current with the same amplitude, the same frequency and a phase lag of 120° electrical angle. In this case, a rotating magnetic field can be formed in the stator three-phase winding coil 13, and by adjusting the amplitude and frequency of the above-mentioned three-phase alternating current, the rotation speed and magnetic field strength of the above-mentioned rotating magnetic field can be adjusted.

[0103] It can be understood that the magnetic field lines of the rotating magnetic field formed in the stator three-phase winding coil 13 cut the closed rotor three-phase winding coil 26, causing each coil of the rotor three-phase winding coil 26 to generate an induced current. The above-mentioned induced current will generate an induced magnetic field. The induced magnetic field interacts with the rotating magnetic field to cause the fan blades 25 of the rotor 2 to rotate and generate wind force, thereby realizing the heat dissipation function of the fan module 10.

[0104] On the other hand, an embodiment of the present application further provides a server, Figure 9 A schematic diagram of the structure of the server provided in an embodiment of the present application.

[0105] See also Figure 9The server 100 includes a motherboard 6 and a fan module 10 as described in any of the above embodiments, which is disposed on the motherboard 6. The fan module 10 can transfer heat from high-temperature components to the external environment by forcing air flow. Because the fan module 10 provided in the embodiments of the present application has an improved vibration reduction effect, after the fan module 10 is disposed on the motherboard 6, the mechanical vibration generated by the operation of the fan module 10 will not be transmitted to other components on the motherboard, thereby improving the reliability of various components on the motherboard 6 of the server 100.

[0106] For example, the fan module 10 can be integrated into the heat sink of the CPU, which is the computing core of the server 100 and has a high operating temperature. For example, metal fins can be used to increase the heat dissipation area, and the fan module 10 forces air flow through the fins to remove heat generated by the CPU.

[0107] For example, the fan module 10 can also be integrated into the heat sink of the GPU (graphics processing unit), or the fan module 10 can also be directly set above the GPU. The GPU is used for parallel computing (such as AI training), and its power consumption is comparable to that of the CPU, and its operating temperature is also higher.

[0108] For example, the fan module 10 can also be installed above a key IC, memory, hard disk, or power module to dissipate heat. For example, the key ICs may include a northbridge chip, a southbridge chip, a PMIC (power management integrated circuit), a VR controller (voltage regulator controller), a DC-DC (direct current-direct current) converter, etc.

[0109] Because the fan module 10 has an enhanced vibration damping effect, when the fan module 10 is installed on the motherboard 6, the mechanical vibrations generated by the fan module 10 are not transmitted to the hard disk, thereby not affecting parameters such as the hard disk's seek time, data transfer rate, and error rate per million bits. Furthermore, the mechanical vibrations generated by the fan module 10 are not transmitted to key ICs, thereby improving the reliability of these ICs.

[0110] In some embodiments, see Figure 9 The server 100 further includes a buckle 7, and the fan frame base 11 of the fan module 10 is connected to the motherboard 6 via the buckle 7. For example, four buckles 7 can be respectively provided at the four corners of the surface of the fan frame base 11 on one side close to the motherboard 6.

[0111] For example, the mainboard 6 is pre-set with a circular or square hole that matches the size of the clip 7. The clip 7 can be L-shaped or U-shaped plastic or metal. One end of the clip 7 is fixed to the fan frame base 11, and the other end of the clip 7 can be elastically opened and closed. The clip 7 made of plastic or metal is fixed by elastic deformation.

[0112] For example, the fan frame base 11 of the fan module 10 can be fixedly connected to the mainboard 6 by metal screws. Alternatively, the fan frame base 11 of the fan module 10 can be fixedly connected to the mainboard 6 by a hot-swap interface. Alternatively, the fan frame base 11 of the fan module 10 can be fixedly connected to the mainboard 6 by combining a magnetic auxiliary positioner with a buckle 7.

[0113] In some embodiments, see Figure 9 The server 100 further includes a fan connector 8, through which the stator three-phase winding coil 13 of the stator 1 is electrically connected to the motherboard 6. It is understandable that the fan connector 8 is provided on the motherboard 6 and is electrically connected to the motherboard 6.

[0114] Exemplarily, the fan module 10 also includes a lead wire 13a, one end of the lead wire 13a is electrically connected to the stator three-phase winding coil 13, and the other end of the lead wire 13a is led out from the fan frame base 11 and electrically connected to the fan connector 8, thereby realizing the electrical connection between the fan module 10 and the motherboard 6.

[0115] Exemplarily, the fan connector 8 can be used to supply power to the fan module 10 and transmit a speed control signal to the fan module 10 , and the mainboard 6 can monitor the operating status of the fan module 10 through the fan connector 8 , for example, monitoring the speed, voltage, current, etc. of the fan module 10 .

[0116] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the components and steps of each example according to their functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0117] The above is a detailed introduction to a fan module and server provided by the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A fan module, characterized in that: Includes stator, rotor and winding fixture; The rotor is disposed in the stator, and includes a rotating shaft, bearings disposed at both ends of the rotating shaft, and a first magnet disposed on the bearings; The bearing is arranged on the winding fixing device, and the winding fixing device includes a second magnet. The second magnet has the same polarity as the first magnet and is close to each other, so that the rotor is suspended.

2. The fan module according to claim 1, wherein: The second magnet includes a U-shaped groove along a reference plane perpendicular to the rotation axis; The first magnet is disposed in the U-shaped groove of the second magnet.

3. The fan module according to claim 1, wherein: The bearing includes a first surface and a second surface facing each other along a first direction perpendicular to the rotation axis; the bearing includes a third surface and a fourth surface facing each other along a second direction perpendicular to the rotation axis, wherein the second direction intersects the first direction; The first magnet includes a first portion disposed on the first surface, a second portion disposed on the second surface, and a third portion disposed on the third surface; Along the first direction, the second magnet includes a fourth part and a fifth part relative to each other, and the second magnet also includes a sixth part connecting the fourth part and the fifth part; the first part is arranged opposite to the fourth part, the second part is arranged opposite to the fifth part, and the third part is arranged opposite to the sixth part.

4. The fan module according to claim 3, wherein: The winding fixing device further includes a support rod, which is connected to the sixth part and is used to support the second magnet.

5. The fan module according to claim 4, characterized in that: The stator includes a fan frame base, and the support rod is fixedly connected to the fan frame base.

6. The fan module according to any one of claims 3 to 5, characterized in that: The first part, the second part and the third part are all ferrite sheet magnets; and / or, The fourth portion, the fifth portion, and the sixth portion are all ferrite sheet magnets.

7. The fan module according to claim 1, wherein: The rotor further comprises a fan blade outer frame and fan blades, wherein the fan blade outer frame is cylindrical and the fan blades are embedded in the fan blade outer frame; The rotating shaft is fixedly connected to the fan blade outer frame to drive the fan blade outer frame and the fan blades to rotate.

8. The fan module according to claim 7, characterized in that: The rotor further includes a three-phase winding coil, which is embedded in the inner wall of the fan blade outer frame.

9. The fan module according to claim 8, characterized in that: The stator includes a fan frame shell, which is cylindrical. The inner diameter of the fan frame shell is greater than the outer diameter of the fan blade outer frame.

10. The fan module according to claim 9, characterized in that: The stator further includes a three-phase winding coil, and the three-phase winding coil of the stator is embedded in the inner wall of the fan frame shell.

11. The fan module according to claim 10, wherein: The three-phase winding coil of the rotor is a closed coil; The three-phase winding coil of the stator is powered and is used to generate a force on the three-phase winding coil of the rotor to drive the rotor to rotate.

12. The fan module according to any one of claims 9 to 11, characterized in that: The stator further includes a fan frame base, and the fan frame shell is fixedly connected to the fan frame base.

13. A server, characterized in that: include: Motherboard; The fan module according to any one of claims 1 to 12, wherein the fan module is arranged on the mainboard.

14. The server according to claim 13, wherein: The server further comprises a buckle, and the fan frame base of the fan module is connected to the mainboard via the buckle.

15. The server according to claim 13, wherein: The server further includes a fan connector, through which the three-phase winding coil of the stator is electrically connected to the mainboard.

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