200905094 九、發明說明： 【發明所屬之技術領域】 本發明涉及—種轴 磁懸浮轴承之散熱風1尤指一種磁懸浮轴承及採用該 【先前技術] 目如’車由承廣泛雍 .、應用於各種設備中，如硬碟驅動器、 數位化視省先碟機 領域，該等裂置中馬、查碟機、磁先碟機及散熱風扇等 及妄合I电古 達之軸承尺寸小，對轴承之回轉精度 浐直接旦/塑二Ξ而軸承成為該等装置運行之關键’其性 此直接:響整敏置之運轉性能和工作效率。 释。:乏使用之轴承包括滚珠轴承及含油軸承等幾 通。在沒成類軸承中，老15 Λ- 俠蛛*曰 热法迴避機械摩擦問題。機械摩 it妾之後果即為轴承壽命之縮短，轴承失效後致 ，丨、堂巧， 咎。為解決摩擦問題，人們做過不 2定程产上it、採用潤滑油等，該等措施雖然能 決問題，在HZ採^機械摩擦，但並不能從根本上解 接觸為基礎。、4用之鱗措施均係、以轴承存在機械 近年來也有以非機械圾 . 妾觸方式設計製造之軸承出現， 相斥之原理，使軸承_/用兴性磁極相吸，同性磁極 /、 K現非機械接觸之相對運轉，從 而達到消除機械摩擦之問顳乂 ^ 部件較多，拥兩产* ，喊。但目前之磁懸浮軸承之附屬 複、 而由承上加支點或加電磁控設備，其結構 '，成本較兩’不利於產業上之利用，因而存在很大 6 200905094 之改善空間。 【發明内容】 有鑒於此，有必要提供一種既能消除機械摩擦又具有 簡單適用之結構之磁懸浮軸承及採用該磁懸浮軸承之散熱 風扇。 一種磁懸浮軸承，包括一對轴承外套、轴承内套和轴， 該對轴承外套對稱置於轴承内套之兩端並與軸承内套保持 一定間距，軸穿設固定在軸承内套中，該軸承内套與該對 軸承外套均由磁性材料製成，且轴承内套與軸承外套之對 應面之磁極相同。 一種散熱風扇，包括扇框、磁懸浮軸承、定子構件、 ； 轉子構件，磁懸浮轴承包括軸承内套和對稱置於轴承内套 兩端並與軸承内套保持一定間距之一對軸承外套，轉子構 _件包括一軸，軸插設固定在軸承内套中，轴承内套與軸承 外套均由磁性材料製成，且軸承内套與軸承外套之對應面 之磁極相同。 上述磁懸浮軸承利用異性磁極相吸，同性磁極相斥原 理實現軸與軸承外套無機械摩擦之相對轉動，大大提高了 轴承結構之使用壽命，且其結構簡單，將轴承内套與轴固 設在一起，僅用具有磁性之轴承外套與轴承内套就能達到 其他結構複雜，元件繁多之轴承之功能。 【實施方式】 請同時參閱圖1和圖2，該磁懸浮轴承主要包括一對軸 承外套10、一轴承内套20和一軸30。 200905094 軸承外套10和轴承内套2G均由磁性材料製成。軸承 料1〇整體呈半球體雜，其㈣形成—半球體形狀之空 八13，空穴13與軸承外套1〇同球心。軸承外套1〇於其半 球頂部中央還形成一通孔u，該通孔u與 通孔U與轴承外套1G共中心軸。 、13相連通 轴承内套20之中間部分呈圓柱體狀，兩端部分呈半球 體狀，承内套20之兩端面形成半球面，半球面與中間部 分之圓柱體之外表面相切。軸承内套2()之中心形成袖孔（未 標號），以供轴30 ?設通過，且軸3〇之兩末端外露於轴承 内套20之兩端之外。軸3〇與軸承内套2〇固定在—起形成 —整體’其固定之方式有多種，如可在成型轴承内套20時 將轴承内套20 -體成型於轴3G上，也可於單獨成型車由承 =2〇後將轴30插設於軸承内套2Q之轴孔内固定。袖承 & 2〇之兩端之半球面直徑小於軸承外套ι〇之空穴^之 因而軸承内套2G之兩端能容置於軸承外套10之玄 八13内亚保持相分離，同時軸3〇 之通孔U之直徑，因而㈣ 直到、於轴承外套1〇 露於軸承外套10之夕卜 兩末、能通過通孔U而外 套2〇夕兩迚十丄一'甘神艰内套20之兩端，軸/ 轴承外套10之通孔11，軸3。虚二:。轴3°之兩端d 轴30之兩末端载有載荷（ 之間也有-定間丨 套2。一起相對轴撕!。轉動、广工作時軸30和軸承 200905094 下面以圖2為例說明該磁懸浮軸承之工作原理。假設 軸承外套10和軸承内套20之磁極如圖2中所示，且轴承 外套10和軸承内套20之各處磁場強度均相等，其相互受 到之磁力大小僅隨它們之間間隙而變化。軸承内套20之頂 端為S極，底端為N極，位於軸承内套20之頂端之轴承外 套10其内表面為S極，外表面為N極，位於軸承内套20 之底端之軸承外套10其内表面為N極，外表面為S極，也 即轴承内套20之兩端之磁極分別與其對應之軸承外套10 之内表面之磁極相同。 根據異性磁極相吸，同性磁極相斥之原理，軸承内套 20之兩端面均受到轴承外套10之排斥力，該等力之方向與 軸承内套20之兩端之半球面正交且指向軸承内套20之兩 端之球心。為了便於軸承内套20之受力分析，將該等力分 解成沿徑向方向和沿轴向方向之兩分力。由於轴承内套20 以及軸承外套10都係對稱性結構，當轴承内套20受力達 到平衡時，軸承内套20會置於軸承外套10内之空穴13之 中心，也即軸承外套10之球心處於軸承内套20之中心軸 線之上，此時軸承内套20受到之各個方向之沿徑向方向之 排斥分力均相等且指向軸承内套20之軸心，各個排斥分力 互相抵消從而使轴承内套20達到平衡。在圖2中表現為轴 承内套20與轴承外套10之徑向間隙均相等，而在轴向上， 轴承内套20之頂端與其對應之轴承外套10之内表面之轴 向間距dl與軸承内套20之底端與其對應之轴承外套10之 内表面之軸向間距d2亦相等。 9 200905094 上述為磁懸浮軸承處於平衡時之狀態，當磁懸浮軸承 在運轉過程中會受到外力之影響進而影響其平衡性，下面 分析其由非平衡態到平衡態之轉化過程。假設軸30受到向 下之軸向外力Pn，軸承内套20與軸30之平衡態受到破壞， 進而軸向向下移動，使得d 1增大、d2減小，因此軸承内套 20之頂端受到其對應之軸承外套10之轴向排斥力減小，底 端受到其對應之軸承外套1 〇之軸向排斥力增大，轴承内套 20受到之磁力合力增大且方向為軸向向上。當dl增大、d2 減小到一定程度時，磁力合力之增量會與軸向外力Pn大小 相等，此時軸承内套20受力重新達到平衡。同樣軸30受 到徑向外力時，軸承内套20與軸承外套10之間之間距也 會發生變化從而能重新達到受力平衡，其原理與上述受軸 向外力時類似，在此不再贅述。 如圖3所示為本發明之另一實施例。該磁懸浮軸承與 上述實施例中之磁懸浮轴承結構相似，包括軸承外套 10a(lOb)、軸承内套20a及軸30a。軸承外套10a、10b同樣 分別置於軸承内套20a之兩端，且其内形成半球形之空穴 13以容置軸承内套20之兩端，其中置於軸承内套20a之頂 端之軸承外套10a與上述實例中之軸承外套10 —樣，設有 一通孔11a以供軸30a穿設通過。不同之處為軸承内套20a 之中心形成盲孔，即底端封閉，軸30a插設固定於轴承内 套20a之盲孔内，只有其頂端外露於軸承内套20a之外並 穿設通過轴承外套l〇a之通孔11a。置於軸承内套20a之底 端之軸承外套10b則底部亦相應地形成封閉之結構。該實 10 200905094 施例適用於軸30a之一端負有載荷之情形（如散熱風扇之 轉子構件），其工作原理與上述實施例相同因而不再贅述。 遠磁懸浮轴承利用異性磁極相吸，同性磁極相斥原理 實現軸30(30a)相對軸承外套10(l〇a、10b)無機械摩擦之轉 動’大大提南了軸承結構之使用壽命’且其結構簡單，將 轴承内套20(20a)與軸30(30a)固設在一起，僅用具有磁性之 軸承外套l〇(l〇a、1〇b)與軸承内套2〇(20a)就能達到其他結 構複雜’元件繁多之軸承同樣之功能。 如圖4所示為採用磁懸浮軸承之一散熱風扇之剖示示 意圖。該散熱風扇包括扇框50、定子構件60、轉子構件7〇 和磁懸浮軸承。 扇框50之底部中央向上凸設形成一中空之圓形軸座 52 ’轴座52靠近其頂端之内壁處向内凸設延伸形成—圓形 之擋環54。 疋子構件60包括電路板6〇1及電枢6〇2,其中電槐602 兒連接至該電路板6〇1 ’從而獲得電流以產生交變磁場。 轉子構件70包括一輪轂72，該輪轂72外緣放射狀地 次设複數扇葉74，輪轂72内侧緣貼設一磁鐵環76。一軸 3〇c固定連接於該輪轂72中央，並向下延伸。 磁ά浮轴承包括—軸承内套2〇c和對稱置於轴承内套 2〇c兩端之一對軸承外套1〇〇、i〇d。軸承内套2〇c與上述實 知例中之軸承内套2〇a具有相同之結構，其中心設有—供 軸30c插设固定之盲孔。軸承外套、i〇d之結構也大致 輿上述實施例中之轴承外套H)a、湯之結構相同，置於轴 200905094 承内套20c之頂端之軸承外套1〇c言泛有一通孔w以供轴 30c穿設通過，不同之處在於轴承外套收、_之外形為 配合中空之轴座52而呈圓桂體狀。 該散熱風扇組裝時，將定子構件6〇套設固定在軸座S2 之外周。轴承外套1〇4靠固定在轴座52之擔環％上， 轴30c穿設通過軸承外套1〇c上之通孔He，並且插設固定 在軸承内套2Ge之目孔内，從而使轴服與轴承内套如〇 固定成-體，承外套1Gd固定在轴承内套2(k之底端並 使軸承内套2〇c與置於其兩端之轴承外套⑽都保持 ：：定間距’轴承外套1Qd之底端再通過設置-圓形之密封 盍80用以固定軸承外套_。該散熱風扇通電後，定子構 件60產生之交變磁場即可驅動轉子構件％之轉動，從而 軸30 c與軸承内套2〇c 一起可相對抽承外套IQ。、_作無 機械摩擦之轉勤，甘丁 & π …、 t /、作原理在上述實施例中已詳細說明 匕不再％ 14。，玄散熱風扇由於磁懸浮軸承運轉過程中盔 ^械因而可大大提高散熱風扇之使鱗命。‘”、 直《lit所述，本發明符合發明專利之要件，爱依法提出 =技r上所述者僅為本發明之較佳實施例，舉凡 或；化：ΐ::=，在爰依本發明精神所作之等效修辞 【圖式簡單;;广以下之申請專利範圍内。 圖為本發明較佳實施例中磁懸浮軸承之 圖2為圖1之剖示示意圖。 〜圖。 圖3為另-實施例之刮示示意圖。 200905094 圖4為採用磁懸浮轴承之散熱風扇之剖不示意圖。 【主要元件符號說明】 軸承外套 10、10a、10b 、10c 、 lOd 通孔 11、11a、11c 空穴 13 軸承内套 20 > 20a > 20c 轴 30、30a、30c 扇框 50 軸座 52 擋環 54 定子構件 60 電路板 601 電枢 602 轉子構件 70 輪轂 72 扇葉 74 磁鐵環 76 密封蓋 80 13200905094 IX. Description of the invention: [Technical field of the invention] The present invention relates to a heat-dissipating wind of a shaft-type magnetic suspension bearing, in particular to a magnetic suspension bearing, and the use of the [prior art] as the vehicle is widely used. In the equipment, such as the hard disk drive, digital display, the first disk machine field, the split horse, the disc machine, the magnetic first disk machine and the cooling fan, etc. and the matching I electric Guda bearing size is small, the bearing The precision of the rotation is 浐 directly/plastic and the bearing becomes the key to the operation of these devices. The directness of this is directly: the operation performance and working efficiency of the sensitization. release. : Bearings that are used in abundance include ball bearings and oil-impregnated bearings. In the unclassified bearing, the old 15 Λ- 侠 曰 曰 曰 曰 曰 曰 曰 回 回 回 回 回 回 回 回 回 回After the mechanical friction, the result is that the bearing life is shortened, and after the bearing fails, it is 丨, 堂, and 咎. In order to solve the friction problem, people have done not to set the production of it, the use of lubricating oil, etc. Although these measures can solve the problem, the mechanical friction in HZ mining, but can not be fundamentally based on contact. 4, the scale measures are used, the bearing exists in the machinery in recent years, there are also non-mechanical waste. The design and manufacture of the bearing is in the form of a touch, the principle of repelling, so that the bearing _ / use magnetic pole attract, the same magnetic pole /, K is now non-mechanical contact relative to the operation, so as to eliminate the problem of mechanical friction 颞乂 ^ more parts, with two production *, shouting. However, the current subsidiary of the magnetic suspension bearing, but by the support of the fulcrum or the addition of electromagnetic control equipment, its structure ', the cost is more than two' is not conducive to the industrial use, so there is a large improvement space of 200905094. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a magnetic suspension bearing that can eliminate mechanical friction and has a simple and applicable structure, and a heat dissipation fan using the same. A magnetic suspension bearing comprises a pair of bearing shells, a bearing inner sleeve and a shaft, wherein the pair of bearing shells are symmetrically placed at two ends of the inner sleeve of the bearing and maintain a certain distance from the inner sleeve of the bearing, and the shaft is fixedly disposed in the inner sleeve of the bearing, the bearing The inner sleeve and the pair of bearing sleeves are made of a magnetic material, and the inner sleeve of the bearing is the same as the magnetic pole of the corresponding surface of the bearing sleeve. A cooling fan comprising a fan frame, a magnetic suspension bearing, a stator member, a rotor member, a magnetic suspension bearing including a bearing inner sleeve and a symmetrically placed at both ends of the inner sleeve of the bearing and maintaining a certain distance from the inner sleeve of the bearing, the bearing sleeve and the rotor structure The component comprises a shaft, the shaft is inserted and fixed in the inner sleeve of the bearing, the bearing inner sleeve and the bearing outer sleeve are made of a magnetic material, and the inner sleeve of the bearing is the same as the magnetic pole of the corresponding surface of the bearing outer sleeve. The magnetic suspension bearing adopts the opposite magnetic pole attraction and the principle of the same magnetic pole repelling to realize the relative rotation of the shaft and the bearing shell without mechanical friction, thereby greatly improving the service life of the bearing structure, and the structure thereof is simple, and the bearing inner sleeve and the shaft are fixed together. Only the bearing shell with magnetic bearing and the inner sleeve of the bearing can realize the functions of other bearings with complicated structure and various components. [Embodiment] Referring to FIG. 1 and FIG. 2 at the same time, the magnetic suspension bearing mainly comprises a pair of bearing shells 10, a bearing inner sleeve 20 and a shaft 30. 200905094 Bearing shell 10 and bearing inner sleeve 2G are made of magnetic material. The bearing material 1〇 is a hemispherical body as a whole, and (4) forms a space of a hemispherical shape. The hole 13 and the bearing shell 1 are the same as the center of the ball. The bearing housing 1 has a through hole u formed in the center of the top of the hemisphere, and the through hole u and the through hole U are coaxial with the bearing housing 1G. 13-phase connection The middle portion of the bearing inner sleeve 20 has a cylindrical shape, and the two end portions are hemispherical, and the end faces of the inner sleeve 20 form a hemispherical surface, and the hemispherical surface is tangent to the outer surface of the cylindrical portion of the intermediate portion. The center of the bearing inner sleeve 2 () forms a sleeve hole (not numbered) for the shaft 30 to pass, and both ends of the shaft 3 are exposed outside the bearing inner sleeve 20. The shaft 3〇 is fixed to the bearing inner sleeve 2〇, and the whole is fixed in various ways. For example, the bearing inner sleeve 20 can be formed on the shaft 3G when the bearing inner sleeve 20 is formed, or can be separately After forming the bearing, the shaft 30 is inserted into the shaft hole of the bearing inner sleeve 2Q and fixed. The hemispherical surface of both ends of the sleeve & 2 小于 is smaller than the hole of the bearing sleeve ι〇, so the two ends of the bearing inner sleeve 2G can be accommodated in the bearing jacket 10, and the phase is separated, while the shaft 3〇 The diameter of the through hole U, and thus (4) until the bearing shell 1 is exposed to the bearing shell 10 at the end of the evening, can pass through the through hole U and the jacket 2 〇 迚 迚 丄 ' ' ' ' 甘 甘 ' ' ' ' ' 20 ends, shaft / bearing housing 10 through hole 11, shaft 3. Virtual two: Both ends of the shaft 3° d-axis 30 are loaded at the two ends (there is also a splicing sill between the two sides. The opposite shaft is torn together! The shaft 30 and the bearing 200905094 during rotation and wide operation are illustrated by taking FIG. 2 as an example. The working principle of the magnetic suspension bearing. It is assumed that the magnetic poles of the bearing outer casing 10 and the inner bearing sleeve 20 are as shown in Fig. 2, and the magnetic field strengths of the bearing outer casing 10 and the inner bearing sleeve 20 are equal, and the mutual magnetic force is only related to them. The gap between the bearing inner sleeve 20 is S pole and the bottom end is N pole. The bearing shell 10 at the top end of the bearing inner sleeve 20 has an inner surface of S pole and an outer surface of N pole. The bearing shell 10 at the bottom end of 20 has an inner surface of N pole and an outer surface of S pole, that is, the magnetic poles of the two ends of the bearing inner sleeve 20 are respectively identical to the magnetic poles of the inner surface of the corresponding bearing outer casing 10. According to the opposite magnetic pole phase The principle of suction and isotropic magnetic pole repulsive, both end faces of the bearing inner sleeve 20 are subjected to the repulsive force of the bearing outer casing 10, and the directions of the forces are orthogonal to the hemispherical surfaces of the two ends of the bearing inner sleeve 20 and are directed to the bearing inner sleeve 20 The center of the ball at both ends. In order to facilitate the bearing inner sleeve 20 According to the force analysis, the forces are decomposed into two components in the radial direction and in the axial direction. Since the bearing inner sleeve 20 and the bearing outer casing 10 are symmetric structures, when the bearing inner sleeve 20 is balanced, The bearing inner sleeve 20 is placed in the center of the cavity 13 in the bearing housing 10, that is, the center of the bearing housing 10 is above the central axis of the bearing inner sleeve 20, at which time the bearing inner sleeve 20 is subjected to various directions. The repulsive component forces in the direction are equal and point to the axis of the bearing inner sleeve 20, and the respective repulsive component forces cancel each other to balance the bearing inner sleeve 20. In Fig. 2, the radial direction of the bearing inner sleeve 20 and the bearing outer casing 10 is shown. The gaps are all equal, and in the axial direction, the axial distance d1 between the top end of the bearing inner sleeve 20 and the inner surface of the corresponding bearing outer casing 10 and the axial direction of the inner surface of the bearing outer casing 10 corresponding to the bottom end of the bearing inner casing 20 The spacing d2 is also equal. 9 200905094 The above is the state of the magnetic suspension bearing in equilibrium. When the magnetic suspension bearing is affected by external force and affects its balance during operation, the following analysis analyzes the transition from non-equilibrium to equilibrium. Assuming that the shaft 30 is subjected to the downward axial external force Pn, the equilibrium state of the bearing inner sleeve 20 and the shaft 30 is broken, and then the axial direction is downwardly moved, so that d 1 is increased and d2 is decreased, so that the bearing inner sleeve 20 is The axial repulsive force of the top end of the bearing shell 10 is reduced, and the bottom end is increased by the axial repulsive force of the corresponding bearing shell 1 ,, and the bearing inner sleeve 20 is subjected to the combined force of the magnetic force and the direction is axially upward. When dl increases and d2 decreases to a certain extent, the incremental force of the magnetic force will be equal to the axial external force Pn, at which time the bearing inner sleeve 20 is again stressed. When the shaft 30 is subjected to a radial external force, the bearing The distance between the inner sleeve 20 and the bearing outer sleeve 10 also changes to regain the force balance. The principle is similar to that described above for the axial external force, and will not be described herein. Another embodiment of the present invention is shown in FIG. The magnetic suspension bearing is similar in structure to the magnetic suspension bearing of the above embodiment, and includes a bearing housing 10a (10b), a bearing inner sleeve 20a, and a shaft 30a. The bearing sleeves 10a, 10b are also respectively placed at both ends of the bearing inner sleeve 20a, and a hemispherical cavity 13 is formed therein to accommodate both ends of the bearing inner sleeve 20, wherein the bearing jacket placed at the top end of the bearing inner sleeve 20a 10a is the same as the bearing housing 10 of the above example, and a through hole 11a is provided for the shaft 30a to pass therethrough. The difference is that the center of the bearing inner sleeve 20a forms a blind hole, that is, the bottom end is closed, and the shaft 30a is inserted and fixed in the blind hole of the bearing inner sleeve 20a, only the top end thereof is exposed outside the bearing inner sleeve 20a and is passed through the bearing. The through hole 11a of the outer casing l〇a. The bearing housing 10b placed at the bottom end of the bearing inner sleeve 20a also forms a closed structure correspondingly. The embodiment 10 200905094 is applicable to the case where one end of the shaft 30a is loaded (such as the rotor member of the cooling fan), and its working principle is the same as that of the above embodiment, and thus will not be described again. The far-magnetic suspension bearing utilizes the opposite-pole magnetic pole attraction and the principle of the same magnetic pole repulsive to realize the rotation of the shaft 30 (30a) relative to the bearing outer casing 10 (l〇a, 10b) without mechanical friction, which greatly increases the service life of the bearing structure and its structure. Simple, the bearing inner sleeve 20 (20a) and the shaft 30 (30a) are fixed together, and only the magnetic bearing sleeve l〇(l〇a, 1〇b) and the bearing inner sleeve 2〇(20a) can be used. Achieve the same function as other bearings with complex structures. Figure 4 is a cross-sectional view showing a heat dissipating fan using a magnetic suspension bearing. The heat dissipation fan includes a fan frame 50, a stator member 60, a rotor member 7A, and a magnetic suspension bearing. The center of the bottom of the fan frame 50 is convexly formed upward to form a hollow circular shaft seat 52. The shaft seat 52 protrudes inwardly from the inner wall of the top end thereof to form a circular retaining ring 54. The latch member 60 includes a circuit board 6〇1 and an armature 6〇2, wherein the power port 602 is coupled to the circuit board 6〇1' to obtain an electric current to generate an alternating magnetic field. The rotor member 70 includes a hub 72. The outer edge of the hub 72 is radially provided with a plurality of blades 74, and a magnet ring 76 is attached to the inner edge of the hub 72. A shaft 3〇c is fixedly coupled to the center of the hub 72 and extends downward. The magnetic raft bearing includes a bearing inner sleeve 2〇c and a symmetrically placed one end of the bearing inner sleeve 2〇c on the bearing outer casing 1〇〇, i〇d. The bearing inner sleeve 2〇c has the same structure as the bearing inner sleeve 2〇a in the above-described embodiment, and is provided with a blind hole in which the shaft 30c is inserted and fixed. The structure of the bearing outer casing and the i〇d is also substantially the same as that of the bearing outer casing H)a and the soup in the above embodiment, and the bearing outer casing 1〇c which is placed at the top end of the inner casing 20c of the shaft 200905094 has a through hole w The shaft 30c is passed through, except that the bearing sleeve is shaped to fit the hollow shaft seat 52 and has a rounded shape. When the heat dissipating fan is assembled, the stator member 6 is sleeved and fixed to the outer circumference of the shaft seat S2. The bearing sleeve 1〇4 is fixed on the balance ring of the shaft seat 52, and the shaft 30c is passed through the through hole He on the bearing sleeve 1〇c, and is inserted and fixed in the eye hole of the bearing inner sleeve 2Ge, thereby making the shaft The bearing inner sleeve is fixed into a body, and the bearing 1Gd is fixed on the bearing inner sleeve 2 (the bottom end of the k and the bearing inner sleeve 2〇c and the bearing outer sleeve (10) placed at both ends thereof are kept:: a fixed distance The bottom end of the bearing sleeve 1Qd is further provided with a circular seal 盍 80 for fixing the bearing jacket _. After the heat-dissipating fan is energized, the alternating magnetic field generated by the stator member 60 can drive the rotation of the rotor member %, so that the shaft 30 c together with the bearing inner sleeve 2〇c can relatively draw the jacket IQ., _ for the mechanical frictionless transfer, Ganding & π ..., t /, the principle has been described in detail in the above embodiment 匕 no longer% 14. The mysterious cooling fan can greatly improve the size of the cooling fan due to the helmet during the operation of the magnetic suspension bearing. '", straight "lit, the invention meets the requirements of the invention patent, love is proposed according to law = technology The above is only a preferred embodiment of the present invention, and the following: The equivalent rhetoric according to the spirit of the present invention is shown in the drawings. FIG. 2 is a schematic cross-sectional view of FIG. 1 in the preferred embodiment of the present invention. Fig. 3 is a schematic view showing the shaving of another embodiment. 200905094 Fig. 4 is a schematic cross-sectional view of a cooling fan using a magnetic suspension bearing. [Main component symbol description] Bearing outer casing 10, 10a, 10b, 10c, lOd through hole 11 , 11a, 11c hole 13 bearing inner sleeve 20 > 20a > 20c shaft 30, 30a, 30c fan frame 50 shaft seat 52 retaining ring 54 stator member 60 circuit board 601 armature 602 rotor member 70 hub 72 blade 74 magnet Ring 76 sealing cover 80 13