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研究生： 謝惠安
Hsieh, Hui-An
論文名稱： 浮動孔隙瓦片複合軸承系統之設計與分析
Design and Analysis of Floating Porous Pads Bearing System
指導教授： 蕭德瑛
Shaw, Dein
口試委員: 宋震國
Sung, Cheng-Kuo
林士傑
Lin, Shih-Chieh
陳明飛
Chen, Ming-Fei
康淵
Kang, Yuan
鄭璧瑩
Cheng, Pi-Ying
學位類別： 博士
Doctor
系所名稱： 工學院 - 動力機械工程學系
Department of Power Mechanical Engineering
論文出版年： 2019
畢業學年度： 108
語文別： 中文
論文頁數： 126
中文關鍵詞： 孔隙瓦片 、浮動油腔環 、靜壓效應 、動壓效應 、液靜壓軸承
外文關鍵詞： Porous pad, Floating bearing, Hydrostatic effect, Hydrodynamic effect, Hydrostatic bearing
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    • 本研究的研究方向為設計及分析浮動孔隙瓦片複合軸承系統，所做的研究中包含了三種以液靜壓軸承為基礎的嶄新軸承設計:孔隙瓦片軸承與浮動油腔環軸承及浮動孔隙瓦片複合軸承。孔隙瓦片軸承利用裝入液靜壓油腔的孔隙瓦片來增強主軸轉動時產生的動壓效應，使其在高速下有較高的承載力。浮動油腔環軸承則將液靜壓油腔改成可移動的浮動油腔環，並以密封環與軸套限制其自由度，在油腔環及密封環之間形成外油腔，其油腔環與與外油腔之壓力差能使主軸朝偏心的反方向位移，在靜止與低速下能降低主軸的偏心率。為了增強軸承之性能尚發展另一個浮動孔隙瓦片複合軸承，此軸承則結合了前兩者的優點，在低速與高速下皆能有超越液靜壓軸承的表現。本研究分析了孔隙瓦片軸承、浮動油腔環軸承與浮動孔隙瓦片複合軸承的各項參數對承載力、剛度、流量與摩擦係數等軸承性能的影響，並給出詳盡的圖表以供設計參考。

    The purpose of this study is to design and analyze three kinds of bearings which include a porous pads bearing, a floating bush bearing, and a hybrid bearing which consists both the floating bush bearing and the porous pads bearing. These three bearings have better performance than the traditional hydrostatic bearing in different ways. For the porous pads bearing, the embedded porous pads in recesses were studied first, which has a stronger hydrodynamic effect and higher load capacity in high shaft speed. Then the floating bush bearing which contains a hydrostatic bearing bush, several compressible sealing rings, and an outer bush is studied. The outer recesses formed between the hydrostatic bearing bush, the sealing rings and the outer bush provide outside pressures to adjust the position of the hydrostatic bearing bush. It compensates the eccentricity of the shaft by moving with the shaft with the hydrostatic bearing bush to its original position, and usually, its performance is good at low shaft speed. The floating porous pads bearing which combines both advantages of two previous bearings outperforms the hydrostatic bearing in either low and high shaft speed. This study analyzed the influence of the bearing parameters of these three kinds of bearings on the load capacity, the attitude angle, the stiffness, the flow rate, and the friction.

    中文摘要 i Abstract ii 誌謝 iii 目錄 iv 圖目錄 viii 表目錄 xiii 符號表 xvi 第一章 導論 1 1.1 研究背景 1 1.2 文獻回顧 3 1.2.1 液靜壓軸承與混壓軸承研究 3 1.2.2 孔隙軸承研究 5 1.2.3 浮動環軸承研究 7 1.3 研究目標與方法 8 1.4 論文架構 9 第二章 液壓軸承理論 10 2.1 流體力學理論 10 2.1.1 納維爾-史托克斯方程式 10 2.1.2 雷諾數 13 2.1.3 雷諾方程式 16 2.1.4 平板流 17 2.1.5 動壓效應 18 2.2 液靜壓軸承模型 19 2.2.1 液靜壓軸承結構 19 2.2.2 液靜壓軸承理論 20 2.2.3 液靜壓軸承計算流程 24 2.2.4 液靜壓軸承性能參數 26 2.2.5 參考文獻驗證 27 第三章 孔隙瓦片軸承設計 29 3.1 孔隙瓦片軸承構型與作動原理 29 3.2 孔隙瓦片軸承理論模型 30 3.2.1 孔隙區的修正雷諾方程式 31 3.2.2 區域因子 34 3.2.3 無因次化 34 3.2.4 壓力分佈 36 3.3 孔隙瓦片軸承之ANSYS模擬與實驗驗證 38 3.3.1 幾何模型建立 38 3.3.2 網格劃分 39 3.3.3 邊界條件 40 3.3.4 油腔壓力疊代 41 3.3.5 驗證結果 42 3.3.6 實驗比較 44 3.4 孔隙瓦片軸承參數與性能分析 45 3.4.1 油腔包角 46 3.4.2 長徑比 49 3.4.3 軸封寬比 51 3.4.4 進給係數 53 3.4.5 滑移係數 55 3.4.6 無因滲透因子 57 3.4.7 節流比 59 3.4.8 孔隙瓦片軸承與液靜壓軸承之比較 61 3.5 討論 64 第四章 浮動油腔環軸承設計 65 4.1 浮動油腔環軸承構型與作動原理 65 4.2 浮動油腔環軸承理論模型 67 4.2.1 外油腔靜壓力 68 4.2.2 密封環彈性力 69 4.2.3 密封環參數限制 71 4.2.4 絕對偏心率 72 4.3 ANSYS模擬驗證理論模型 73 4.3.1 幾何模型建立 73 4.3.2 網格劃分 75 4.3.3 邊界條件 76 4.3.4 模擬軟體驗證結果 78 4.4 浮動油腔環軸承參數與性能分析 78 4.4.1 外油腔包角 79 4.4.2 外腔軸長比 82 4.4.3 無因彈性係數 85 4.4.4 初始間隙比 88 4.4.5 間隙油膜比 91 4.4.6 直徑比 94 4.5 討論 97 第五章 浮動孔隙瓦片複合軸承設計 99 5.1 軸承構型與作動原理 99 5.2 浮動孔隙瓦片複合軸承參數與性能分析 100 5.2.1 外油腔包角 101 5.2.2 外腔軸長比 104 5.2.3 無因彈性係數 107 5.2.4 初始間隙比 110 5.2.5 間隙油膜比 113 5.2.6 直徑比 116 5.3 討論 119 第六章 結論與未來展望 120 6.1 結論 120 6.2 未來展望 122 參考文獻 123

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