臺灣博碩士論文加值系統

由於目前和未來對於大型、重負載與高精度工具機之要求日益增長，因此，在過去幾年中，液靜壓軸承的發展已經成為一個越來越重要的議題。有鑑於此，本研究將開發一種應用於液靜壓軸承的新型單向滑閥式壓力反饋節流器。
在液靜壓軸承的應用中，最廣泛使用的壓力反饋節流器為薄膜式壓力反饋節流器，其中主要的元件為一片可用於精準控制液壓油流量的彈性金屬薄片。然而，此薄膜式壓力反饋節流器不適合用於極重的負載。因此，本研究將提出另一種使用傳統液壓閥體架構之滑閥式壓力反饋節流器。本文最後證明所研發之滑閥式壓力反饋節流器可以比薄膜式節流器支撐更重的負載並符合預期效果。關於本文提出全新的設計中有兩個重要的特點：第一個特點是液壓油進入節流器時，因採用孔口節流故可有效地避免油溫變化時可能產生的影響。第二特點為藉由兩個裝配於閥體兩側的可調整手輪可以有效擴大應用範圍。最後由實驗結果證明，本文所提出之新型滑閥式壓力反饋節流器搭配液靜壓軸承，成功的使油膜厚度於受到負載時變化極小。

Due to the increasing demands of larger dimension, heavy load and higher precision for current and future machine tools, the development of hydrostatic bearing has become an important issue over the past few years. In this study, therefore, a novel single-acting spool-type pressure feedback restrictor for hydrostatic bearing is developed. Nowadays, the most commonly used pressure feedback restrictor for hydrostatic bearing is membrane type of restrictor, in which a thin and flexible metal sheet serves as the key component control to the hydraulic oil flow precisely. However, the membrane type pressure feedback restrictor is not quite suitable for extremely heavy load. Therefore, an alternative to design the pressure feedback restrictor for hydrostatic bearing using spool type is presented in this study. It is expected and finally proved that the developed spool-type pressure feedback restrictor can support much heavier load than the membrane type of restrictor. There are two significant features regarding the novel design. The first feature is the introduced orifice restrictor which avoids effectively the influence of possible oil temperature variation. The second feature is the design of two adjustable hand wheels that are built into the valve body to widen the application range. Finally, the experimental results prove that the new design of spool-type pressure feedback restrictor with the hydrostatic bearing can successfully make the thickless of oil-film vary a little when it’s loaded.

中文摘要....................................................................i
Abstract..................................................................ii
誌謝.....................................................................iii
目錄......................................................................iv
表目錄....................................................................vii
圖目錄...................................................................viii
符號說明..................................................................xii
第一章 緒論.................................................................1
1.1前言....................................................................1
1.2研究動機.................................................................2
1.3文獻回顧.................................................................4
1.3.1國外對於液靜壓軸承之研究.................................................4
1.3.2國外對於固定式節流器之研究...............................................5
1.3.3國外對於主動式節流器之研究...............................................5
1.3.4國內對於液靜壓技術之研究.................................................7
1.4論文架構.................................................................8
第二章 節流器特性介紹........................................................9
2.1節流器原理..............................................................10
2.2節流器之供油方式.........................................................13
2.3節流器種類..............................................................15
2.3.1固定式節流器..........................................................18
2.3.2主動式節流器..........................................................21
第三章 新型滑閥式壓力反饋節流器之設計與理論...................................26
3.1新型滑閥式反饋節流器之理論分析............................................26
3.1.1閥軸心受力理論分析.....................................................30
3.2新型滑閥式壓力反饋節流器之作動理論分析.....................................31
第四章 實驗設備...........................................................35
4.1液靜壓軸承實驗台架構.....................................................35
4.1.1油溫感應器............................................................37
4.1.2壓力感測器............................................................38
4.1.3流量計................................................................39
4.1.4渦電流感測器..........................................................40
4.2模擬負載之架構..........................................................40
4.2.1手動方向閥............................................................40
4.2.2比例壓力閥............................................................41
4.2.3油壓缸................................................................42
4.2.4荷重感應器............................................................42
4.3供油系統之架構..........................................................43
4.3.1洩壓閥................................................................43
4.3.2油壓泵................................................................44
4.3.3蓄壓器................................................................44
4.3.4散熱器................................................................45
4.4資料擷取卡..............................................................46
4.5 LabVIEW圖控程式軟體....................................................46
第五章 新型滑閥式壓力反饋節流器實驗分析......................................49
5.1靜態量測之實驗分析結果...................................................49
5.1.1改變供油壓力之實驗分析結果..............................................49
5.1.2改變彈簧之實驗分析結果.................................................52
5.2動態量測之實驗分析結果...................................................57
5.2.1改變供油壓力之實驗分析結果..............................................57
5.2.2改變彈簧之實驗分析結果.................................................64
5.3裝設與無裝設滑閥式節流器之性能實驗.........................................73
5.4各彈簧之最適點性能實驗...................................................78
第六章 結論與未來展望......................................................83
6.1結論...................................................................83
6.2未來展望................................................................85
參 考 文 獻................................................................86

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