1326748 九、發明說明： 【發明所屬之技術領域】 本發明有關流體軸承，在轴套内壁表面，設 計具有徑向壓力波的自潤型功能之内溝槽，溝槽 設計考量’兼具潤滑流體流動空間，防止潤滑流 體溢出；溝槽並具有氣孔設計，可自然交換轴承 内、外空氣’達到冷卻的功能，提昇軸承之運轉 效率及旋轉穩定度。 【先前技術】 習知一般的軸承設計，尤其應用於硬碟機、 DVD，$料讀寫功能上，軸、孔之間的間隙約在3 〜5微米（em)’隨著旋轉穩定精密度要求，特別 限定間隙條件。請參考「第一圖」說明，旋轉轴 1 0 2與轴套1 〇 3之間在高轉速時仍能維持低 摩擦、低漏油等需求，軸套内壁或旋轉軸表面具 有内，槽103，溝槽的深度約5〜10微米（私 m)’ f旋轉轴在高速轉動時，内溝槽内的流體可 產生徑向的凸起流體壓力2 0，一圈圓周上同時 產生指向轴心的徑向壓力波，提供轴承穩定旋轉 的流體動力源^ ，2溝槽設計’必須將潤滑流體保留在軸承 =二其主要原因有二：（1)防止潤滑流體洩漏；（2) 維持一定之流體壓力值。 隨著袖、孔之間隙條件要求提高，及轉速增 内部磨润環境變得複雜嚴苛，溫度亦明顯增 溝槽設計具有封閉建壓功用，轴承内部整 力大於外部，勢必會發生内、外部冷熱氣體 5 2:=溝内溝槽的一端，與軸承 可ίίίί、?齒形、箭頭形等形狀；溝槽深度， 在G旋V過程溝槽内的潤滑流體， 力，過程中，被帶動且形成徑向流體壓 ，t正奴轉轴採同心圓的精準旋轉方式。 在轴套内壁或旋轉轴表面，沿轴承的軸向方 :、查：設，流通道21，直接自轴承底部與外 咖Η通ϋίίί空間小於、不等於内溝槽的大小 G交大Ϊ適可提供轴承内、外部冷熱 乂換的通道。在圓周圈上，有複數個軸向氣 2通道2 1 ，其數量未必需要等於内溝槽之數 ^氣流通道2 1的設計方式，請參閱「第三圖」 ，可設置在内溝槽的封閉端，藉由通道盥外 =連通。通道的大小空間設計’不適於潤滑油流 動0 請參閱「第四圖」所示，在流體軸承的軸套 ^壁表面，或於旋轉轴表面上，圓周圈上設有複 數組流體内溝槽1 〇 3及潤滑流體儲放空間i 〇 4。環形潤滑流體儲放空間，具有一定的深度， 連續環繞於軸承内壁表面。沿軸向方向，轴承内 部至少設置一組潤滑流體儲放空間，其中一組置 於内溝槽之封閉端，與内溝槽連接。、 利用軸承内部的潤滑流體儲放空間，設置轴 向氣流通道2 1 ’與外界連通’其大小空間小於、 不等於内溝槽的大小空間，通道空間大小適可提 供軸承内、外部冷熱氣流交換的通道。在圓周圈 上，有複數個軸向氣流通道2 1，其數量未必需 要等於内溝槽之數量。 ' 1326748 本發明的氣流通道設計’尤其適用於流艘轴 承採用空氣做為潤滑流體，冷卻效果更佳。 綜上所述，本發明的設計，可有效改善流體 轴承的内、外部壓力、溫度條件之平衡，進而使 本發明更實用、更符合使用者之所需，確已符合 發明專利申請之要件，爰依法提出專利申請。 惟以上所述者，僅為本發明之流體轴承設計 實施例而已，當不能以此限定本發明實施之範 圍；故，凡依本發明申請專利範圍及發明說明書 内容所作之簡單的等效變化與修飾，皆應仍屬本 發明專利涵蓋之範圍内。 【圖式簡單說明】 第- -圖 係流體軸承概念設計示意圖。 第： •IS 一圃 係本發明之流體轴承設計示意圖。 第i L圖 係本發明之另一流體轴承設計示意圖。 第四圖 係本發明之另一流體軸承設計示意圖。 【主要元件符號說明】 10----轴承 101 ---轴套 102 ---旋轉轴 103 ---内溝槽 104 ---潤滑流體儲放空間 105 ---旋轉方向 106——偏心推力 20 ----流想壓力 21 ----氣流通道 22——交換氣流 81326748 IX. Description of the Invention: [Technical Field] The present invention relates to a fluid bearing, which is designed to have a self-lubricating function of a radial pressure wave on the inner wall surface of the sleeve, and the groove design considers both a lubricating fluid The flow space prevents the lubricating fluid from overflowing; the groove has a venting design, which can naturally exchange the internal and external air of the bearing to achieve the cooling function, and improve the operating efficiency and rotational stability of the bearing. [Prior Art] A general bearing design, especially for hard disk drives, DVDs, and material reading and writing functions, the gap between the shaft and the hole is about 3 to 5 micrometers (em)' with the rotation stability precision. It is required to specifically define the gap condition. Please refer to the "first figure" description. The rotation axis 1 0 2 and the sleeve 1 〇3 can maintain the requirements of low friction and low oil leakage at high speed. The inner wall of the sleeve or the surface of the rotating shaft has the inner groove 103. The depth of the groove is about 5~10 micrometers (private m)' f. When the rotating shaft rotates at a high speed, the fluid in the inner groove can generate a radial convex fluid pressure 20, and the circular axis simultaneously produces a pointing axis. The radial pressure wave provides a fluid power source for stable rotation of the bearing ^, 2 groove design 'must retain the lubricating fluid in the bearing = two. The main reason is two: (1) to prevent leakage of lubricating fluid; (2) to maintain a certain Fluid pressure value. As the gap between the sleeve and the hole is increased, the internal grinding environment becomes complicated and severe, and the temperature is also significantly increased. The groove design has a closed pressure function, and the internal force of the bearing is larger than the outside, which is bound to occur inside and outside. Hot and cold gas 5 2: = one end of the groove in the groove, and the bearing can be ίίίί, ? tooth shape, arrow shape, etc.; groove depth, in the G-rotation V process groove lubrication fluid, force, in the process, is driven And the formation of radial fluid pressure, t positive slave rotation axis adopts the precise rotation mode of concentric circles. On the inner wall of the bushing or the surface of the rotating shaft, along the axial direction of the bearing: check: set, the flow channel 21, directly from the bottom of the bearing and the outer coffee ϋ ίίί space is less than, not equal to the size of the inner groove G Provides channels for internal and external cooling of the bearings. In the circumferential circle, there are a plurality of axial air 2 channels 2 1 , the number of which does not necessarily need to be equal to the number of inner grooves ^ air flow channel 2 1 design, please refer to the "third figure", can be set in the inner groove Closed end, with channel outside = connected. The size and space design of the channel is not suitable for the flow of lubricating oil. Please refer to the "fourth figure". On the surface of the sleeve of the fluid bearing, or on the surface of the rotating shaft, a circular array of internal grooves is provided on the circumferential ring. 1 〇3 and lubrication fluid storage space i 〇4. The annular lubrication fluid storage space has a certain depth and continuously surrounds the inner wall surface of the bearing. In the axial direction, at least one set of lubricating fluid storage spaces is disposed inside the bearing, one of which is disposed at the closed end of the inner groove and connected to the inner groove. The lubricating fluid storage space inside the bearing is used to set the axial air flow passage 2 1 'connected with the outside world'. The size space is smaller than or equal to the size of the inner groove. The channel space is suitable for providing internal and external hot and cold airflow exchange. Channel. On the circumference, there are a plurality of axial air flow passages 2 1, the number of which is not necessarily equal to the number of inner grooves. ' 1326748 The air flow passage design of the present invention is particularly suitable for use in a flow bearing bearing that uses air as a lubricating fluid for better cooling. In summary, the design of the present invention can effectively improve the balance of internal and external pressure and temperature conditions of the fluid bearing, thereby making the invention more practical and more suitable for the user's needs, and indeed meets the requirements of the invention patent application.提出 Submit a patent application in accordance with the law. However, the above description is only for the fluid bearing design embodiment of the present invention, and the scope of the invention is not limited thereto; therefore, the simple equivalent change made according to the scope of the patent application and the description of the invention is Modifications are still within the scope of the invention. [Simple description of the diagram] The first - - diagram is a schematic diagram of the conceptual design of the fluid bearing. Section: • IS 示意图 A schematic diagram of the fluid bearing design of the present invention. The i-L diagram is a schematic diagram of another fluid bearing design of the present invention. The fourth figure is a schematic diagram of another fluid bearing design of the present invention. [Main component symbol description] 10----bearing 101 --- bushing 102 --- rotating shaft 103 --- inner groove 104 --- lubricating fluid storage space 105 --- rotating direction 106 -- eccentric Thrust 20 ---- Flow Wanted 21 ---- Airflow Channel 22 - Exchange Airflow 8