CN107147265B - Server radiator fan - Google Patents
Server radiator fan Download PDFInfo
- Publication number
- CN107147265B CN107147265B CN201710533107.6A CN201710533107A CN107147265B CN 107147265 B CN107147265 B CN 107147265B CN 201710533107 A CN201710533107 A CN 201710533107A CN 107147265 B CN107147265 B CN 107147265B
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- CN
- China
- Prior art keywords
- coil
- rotating shaft
- outer rotor
- cooling fan
- inner stator
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
- H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2786—Outer rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a server cooling fan, comprising: a rotating shaft; permanent magnets fixedly arranged at the upper end and the lower end of the rotating shaft; the outer rotor is sleeved on the rotating shaft and positioned between the two permanent magnets; the outer rotor is provided with fan blades; the inner stator is used for fixing the rotating shaft and supporting the outer rotor when the rotating shaft does not work; the xz coil and the y coil are arranged at the positions of the two permanent magnets and used for suspending the permanent magnets and the rotating shaft after being electrified. The server cooling fan can solve the problems of high noise, high power consumption and poor cooling effect.
Description
Technical Field
The invention relates to the technical field of cooling fans, in particular to a server cooling fan.
Background
It is well known that server cooling fans are the largest source of noise within a server chassis and are even the only noise producer. To achieve better heat dissipation, server cooling fans often operate at speeds of two to three thousand, and the high speed rotation of the blades, which frictionally wear out the fan assembly, itself generates heat.
Disclosure of Invention
The invention aims to provide a server cooling fan which can solve the problems of high noise, high power consumption and poor cooling effect.
In order to achieve the above object, the present invention provides a server cooling fan, including:
a rotating shaft;
permanent magnets fixedly arranged at the upper end and the lower end of the rotating shaft;
the outer rotor is sleeved on the rotating shaft and positioned between the two permanent magnets; the outer rotor is provided with fan blades;
the inner stator is used for fixing the rotating shaft and supporting the outer rotor when the rotating shaft does not work;
the xz coil and the y coil are arranged at the positions of the two permanent magnets and used for suspending the permanent magnets and the rotating shaft after being electrified.
Compared with the background technology, the server cooling fan provided by the invention fundamentally solves the problems of high noise and high cooling power consumption of the server cooling fan by utilizing the characteristics of small friction and high efficiency in the magnetic suspension technology. When the coil of the inner stator is electrified, magnetism is generated, and the electrified coil and the magnet are combined to realize the function of magnetic suspension; the magnetic force in the directions of the x axis, the y axis and the z axis is generated on the rotating shaft provided with the permanent magnet by adopting the electrified coil, so that the rotating shaft is suspended in the air, the outer rotor embedded with a plurality of magnetic poles is arranged on the rotating shaft, and the inner stator can be formed by winding an enameled wire and a silicon iron sheet. The inner stator generates a magnetic field for the outer rotor, so that the outer transmission belt drives the fan blades to move at a high speed. So set up, combine magnetic suspension technique and external rotor DC brushless motor technique, can fundamentally solve server radiator fan noise big, the consumption is big, and the not good problem of radiating effect, can also improve the life of server simultaneously, maintain server work at best radiating state, noise reduction improves user experience.
Preferably, the inner stator comprises an enameled wire and a plurality of layers of silicon steel sheets; the silicon steel sheets are stacked in layers to form an annular structure having a peripheral groove for accommodating the enameled wire.
Preferably, the inner side of the outer rotor is provided with magnetic poles forming air gaps with the enameled wires, and the magnetic poles are specifically N poles and S poles which are alternately arranged.
Preferably, the magnetic sensor further comprises Hall elements which are respectively arranged on the xz coil and the y coil and are used for detecting the space positions of the two permanent magnets,
the Hall element, the xz coil and the y coil are all connected with a controller which is used for calculating magnetic field force to which the permanent magnet is subjected and current of the xz coil and/or the y coil corresponding to the magnetic field force according to offset when the axial position of the permanent magnet is offset relative to the inner stator, and controlling the xz coil and/or the y coil to output corresponding current.
Preferably, the motor further comprises a display part which is connected with the inner stator and used for calculating and displaying the rotating speed of the outer rotor according to the electrifying current of the inner stator.
Preferably, the display part further comprises a time display area connected with the inner stator and used for displaying the current running time and/or the accumulated running time of the server cooling fan.
Preferably, the fan blades are uniformly distributed on the outer rotor.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a server cooling fan according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a server cooling fan according to an embodiment of the present invention.
The server cooling fan provided by the invention comprises a rotating shaft 1, wherein the rotating shaft 1 can be vertically arranged, namely is perpendicular to the ground and extends along the direction of a z axis.
Permanent magnets 5 are arranged at the upper end and the lower end of the rotating shaft 1, and the two permanent magnets 5 are fixedly arranged with the rotating shaft 1 and keep the relative positions fixed; an outer rotor 4 is further sleeved on the outer side of the rotating shaft 1, and the outer rotor 4 is located between the two permanent magnets 5; fan blades 3 are fixed to outer rotor 4, and fan blades 3 can keep synchronous motion with outer rotor 4. Wherein, a plurality of fan blades 3 can be uniformly distributed on the outer rotor 4.
The inner stator 2 is positioned at the inner side of the outer rotor 4, and the inner stator 2 is provided with a through hole for the rotating shaft 1 to penetrate through in the z-axis direction; when the server cooling fan is not in operation, that is, the rotating shaft 1 is not rotating, the rotating shaft 1 is constrained in the through hole of the inner stator 2, and the through hole is a central hole of the inner stator 2; meanwhile, when the server cooling fan is not in operation, the inner stator 2 supports the outer rotor 4, that is, the outer rotor 4 keeps the position in the z-axis direction fixed under the action of the inner stator 2.
An xz coil 7 and a y coil 6 are arranged at the two permanent magnets 5, as shown in the attached figure 1 of the specification; the xz coil 7 is annular and used for restricting the directions of the x axis and the y axis of the rotating shaft 1; the y-coil 6 is used to constrain the z-axis direction of the spindle 1.
That is, before the server cooling fan is not powered on, the rotating shaft 1 is constrained in the through hole of the inner stator 2, the fan blades 3 are fixed on the outer surface of the outer rotor 4, the outer rotor 4 is sleeved on the rotating shaft 1, two ends of the rotating shaft 1 are sleeved with annular permanent magnets 5, and the upper permanent magnet 5 and the lower permanent magnet 5 are both provided with xz coils 7 and y coils 6.
When the server cooling fan is powered on, the y coil 6 and the xz coil 7 are electrified to generate a magnetic field, and the rotating shaft 1 sleeved with the permanent magnet 5 is suspended under the action of the magnetic field force; after the rotating shaft 1 is suspended, the central line of the rotating shaft 1 is superposed with the central line of the inner stator 2, and the outer rotor 4 sleeved on the rotating shaft 1 is suspended in the air along with the suspension of the rotating shaft 1. Meanwhile, after the inner stator 2 is electrified, the outer rotor 4 rotates relative to the inner stator 2, and then the fan blades 3 connected with the outer rotor 4 are driven to rotate.
It can be seen that the purpose of rotating the fan blade 3 around the rotating shaft 1 can be achieved by utilizing the outer rotor 4 and the inner stator 2; and can realize the suspension of pivot 1 upper and lower both ends through two permanent magnets 5 and y coil 6 and xz coil 7 for pivot 1 is at rotatory in-process, and upper and lower both ends all do not receive the friction of entity part, but with the air contact, greatly reduced wearing and tearing, reduced the noise, improved the rotational speed of pivot 1, maintain server work in best heat dissipation state.
Aiming at the specific setting mode of the inner stator 2, the inner stator can comprise an enameled wire and a plurality of layers of silicon steel sheets; and the multiple layers of silicon steel sheets are stacked to form an annular structure with a peripheral groove for accommodating the enameled wire. That is, the enameled wire cladding is on the groove of a plurality of annular silicon steel sheet periphery of piling up together, and pivot 1 can pass the inner ring of silicon steel sheet, and the inner ring diameter will be greater than the diameter of pivot 1. Wherein, the inner ring is the through-hole after the multilayer silicon steel sheet piles up.
Of course, the inner side of the outer rotor 4 may also be provided with magnetic poles 9, the magnetic poles 9 and the enameled wire form an air gap, and the magnetic poles 9 are N poles and S poles which are alternately arranged. That is, the inner side of the shell of the outer rotor 4 is provided with the N poles and the S poles which are alternately arranged, all the N poles and the S poles form the magnetic poles 9, a certain air gap exists between the magnetic poles 9 and the enameled wires (namely coils) of the inner stator 2, the fan blades 3 are arranged outside the outer rotor 4, the coils of the inner stator 2 are electrified, the inner stator 2 is formed by winding silicon steel sheets and the enameled wires, after the electrification, an alternately changed magnetic field can be generated to push the outer rotor 4 to rotate, and the fan blades 3 generate wind power to radiate heat of the server along with the rotation of the outer rotor 4.
According to the server cooling fan provided by the invention, the y coil 6 and the xz coil 7 can also be provided with the Hall elements 8, and the two Hall elements 8 are fixed relative to the y coil 6 and the xz coil 7 respectively; that is, when the server cooling fan operates, the relative positions of the y-coil 6, the xz-coil 7, the inner stator 2, and the two hall elements 8 are not changed, and the rotating shaft 1, the outer rotor 4, and the two permanent magnets 5 rotate as a whole with respect to the inner stator 2. During the rotation of the rotating shaft 1, it is desirable that the axis of the rotating shaft 1 coincides with the center line of the inner stator 2 to ensure that the rotating shaft 1 maintains a vertical state.
The y coil 6, the xz coil 7 and the Hall element 8 are further connected with a controller, when the axial position of the permanent magnet 5 deviates relative to the inner stator 2, the magnetic field force to which the permanent magnet 5 is subjected and the current magnitude of the magnetic field force corresponding to the xz coil 7 and/or the y coil 6 are calculated according to the deviation, and the xz coil 7 and/or the y coil 6 are controlled to output corresponding currents. That is, the hall elements 8 fixedly mounted on the y-coil 6 and the xz-coil 7 always detect the position of the permanent magnet 5 with respect to the center of the inner stator 2 in the x-axis, y-axis, and z-axis. If the position is deflected, the position of the rotating shaft 1 can be corrected by increasing the force of the magnetic field. For example, when the fan rotating shaft 1 deflects to the positive y-axis direction, the hall element 8 detects the offset, and the y-axis coil 6 increases the repulsive force corresponding to the offset to the permanent magnet 5 in the positive y-axis direction, so that the center line of the fan rotating shaft 1 coincides with the center line of the inner stator 2.
Specifically, during the operation of the server cooling fan, the following steps may be performed:
the method comprises the following steps: the two Hall elements 8 are used for respectively detecting that the two permanent magnets 5 deflect in a certain specific direction;
step two: the controller calculates the offset of the permanent magnet in the direction by utilizing a Hall effect physical formula according to the detection signal of the Hall element 8;
step three: the controller calculates the current needed to be led in by the coil in the corresponding direction according to the offset, so as to generate magnetic field repulsion in the direction;
step four: the offset of the permanent magnet 5 in the direction is gradually reduced by the magnetic field repulsive force generated by the corresponding coil, the Hall element 8 continuously detects the offset, if the offset is not zero, the step three is continued, otherwise, the step five is entered;
step five: the offset of the permanent magnet 5 in this direction is zero and the coil continues to keep the previous current signal to keep the permanent magnet stable in this direction.
Therefore, the invention organically integrates the magnetic suspension technology and the outer rotor direct current brushless motor, the magnetic suspension technology is that the permanent magnet is suspended by the electromagnet, the spatial offset of the rotating shaft sleeved with the permanent magnet 5 is detected by the Hall element 8, the offset of the controller to a specific direction is used, and the central line of the rotating shaft 1 is coincided with the central line of the inner stator 2 by adopting the method of increasing the coil magnetism.
The display part can be used for displaying the rotating speed of the outer rotor 4 in real time, is connected with the inner stator 2, and calculates the rotating speed of the rotor 4 by acquiring the electrifying current of the inner stator 2; the specific calculation process may refer to the prior art, and is not described herein again. The display part can also be provided with a display area for displaying the current running time and/or the time display area of the accumulated running time of the server cooling fan. The display part and the display area can be imaged by adopting an LED light source, and the display principle and the specific shape structure can be determined according to the actual requirement.
The server cooling fan provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. A server cooling fan, comprising:
a rotating shaft (1);
permanent magnets (5) fixedly arranged at the upper end and the lower end of the rotating shaft (1);
the outer rotor (4) is sleeved on the rotating shaft (1) and positioned between the two permanent magnets (5); the outer rotor (4) is provided with fan blades (3);
the inner stator (2) is used for fixing the rotating shaft (1) and supporting the outer rotor (4) when the rotating shaft (1) does not work;
an xz coil (7) and a y coil (6) which are arranged at the positions of the two permanent magnets (5) and used for suspending the permanent magnets (5) and the rotating shaft (1) after being electrified,
wherein:
the z direction is vertically arranged, the x direction and the y direction are perpendicular to the z direction, and the x direction and the y direction are perpendicular to each other.
2. The server cooling fan according to claim 1, wherein the inner stator (2) comprises an enameled wire and a plurality of layers of silicon steel sheets; the silicon steel sheets are stacked in layers to form an annular structure having a peripheral groove for accommodating the enameled wire.
3. The server cooling fan according to claim 2, wherein the inner side of the outer rotor (4) is provided with magnetic poles (9) forming an air gap with the enameled wire, and the magnetic poles (9) are N poles and S poles arranged alternately.
4. The server cooling fan according to any one of claims 1 to 3, further comprising Hall elements (8) provided to the xz coil (7) and the y coil (6), respectively, for detecting spatial positions of the two permanent magnets (5),
the Hall element (8), the xz coil (7) and the y coil (6) are connected to a controller, and the controller is used for calculating magnetic field force to which the permanent magnet (5) is subjected and current magnitude of the xz coil (7) and/or the y coil (6) corresponding to the magnetic field force according to the offset when the axial line position of the permanent magnet (5) is offset relative to the inner stator (2), and controlling output of corresponding current to the xz coil (7) and/or the y coil (6).
5. The server cooling fan according to claim 4, further comprising a display portion connected to the inner stator (2) for calculating and displaying a rotation speed of the outer rotor (4) according to the energization current of the inner stator (2).
6. The server cooling fan according to claim 5, wherein the display part further comprises a time display area connected to the inner stator (2) for displaying the current operation time and/or the accumulated operation time of the server cooling fan.
7. The server cooling fan according to claim 6, wherein the plurality of fan blades (3) are uniformly distributed on the outer rotor (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710533107.6A CN107147265B (en) | 2017-07-03 | 2017-07-03 | Server radiator fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710533107.6A CN107147265B (en) | 2017-07-03 | 2017-07-03 | Server radiator fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107147265A CN107147265A (en) | 2017-09-08 |
| CN107147265B true CN107147265B (en) | 2019-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710533107.6A Active CN107147265B (en) | 2017-07-03 | 2017-07-03 | Server radiator fan |
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| Country | Link |
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| CN (1) | CN107147265B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110138280A (en) * | 2019-06-17 | 2019-08-16 | 张则羿 | It is a kind of that the floating rotary system of aspiration-type magnetic is often led based on angular momentum conservation law |
| CN110855028B (en) * | 2019-12-13 | 2024-06-11 | 饶冰 | Magnetic suspension fan device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003218433A (en) * | 2002-01-23 | 2003-07-31 | Ntn Corp | Gas circulating fan for excimer laser |
| CN1599227A (en) * | 2004-07-28 | 2005-03-23 | 谭晛 | Contactless magnomotive, magnetic confinement mechanism |
| KR101120507B1 (en) * | 2005-12-21 | 2012-02-29 | 주식회사 동서전자 | Pan-cake type single phase brushless dc motor |
| CN101555905A (en) * | 2008-04-08 | 2009-10-14 | 卓向东 | Magnetic suspension bearing and suspended rotating shaft |
| CN203537277U (en) * | 2013-09-17 | 2014-04-09 | 韩耀斌 | Magnetic suspension photovoltaic generator |
| CN104389741B (en) * | 2014-10-17 | 2017-08-25 | 山东科技大学 | A kind of vertical axes outer rotor magnetic suspending wind turbine generator |
| CN104389742B (en) * | 2014-10-17 | 2017-07-28 | 山东科技大学 | A kind of vertical axes internal rotor magnetic suspending wind turbine generator |
| CN106300778A (en) * | 2016-08-02 | 2017-01-04 | 天津飞旋科技研发有限公司 | The pure air-cooled heat dissipation structure of magnetic suspension motor of impeller one |
| CN206180771U (en) * | 2016-10-09 | 2017-05-17 | 广西电网有限责任公司电力科学研究院 | Magnetic suspension transformer fan |
| CN206294014U (en) * | 2016-12-19 | 2017-06-30 | 南京磁谷科技有限公司 | A kind of magnetic suspension motor rotor structure |
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2017
- 2017-07-03 CN CN201710533107.6A patent/CN107147265B/en active Active
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| CN107147265A (en) | 2017-09-08 |
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Effective date of registration: 20191115 Address after: 215100 No. 1 Guanpu Road, Guoxiang Street, Wuzhong Economic Development Zone, Suzhou City, Jiangsu Province Applicant after: Suzhou Wave Intelligent Technology Co., Ltd. Address before: 450018 Henan province Zheng Dong New District of Zhengzhou City Xinyi Road No. 278 16 floor room 1601 Applicant before: Zhengzhou Yunhai Information Technology Co. Ltd. |
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