系統(tǒng)外文文獻翻譯、中英文翻譯

1、湖南工學(xué)院本科畢業(yè)設(shè)計（論文） 外文譯文 院 （系）： 機械工程學(xué)院 專 業(yè)： 機械設(shè)計制造及其自動化 姓 名： 程艷波 學(xué) 號： 08201420736 指導(dǎo)教師評語： 簽名： 年 月 日 譯文： 液壓系統(tǒng) 液壓傳動和氣壓傳動稱為流體傳動，是根據(jù) 17 世紀帕斯卡提出的液體靜壓力傳動原理而發(fā)展起來的一門新興技術(shù)， 1795 年英國約瑟夫布拉曼 (749在倫敦用水作為工作介質(zhì)，以水壓機的形式將其應(yīng)用于工業(yè)上，誕生了世界上第一臺水壓機。 1905 年將工作介質(zhì)水改為油，又進一步得到改善。 第一次世界大戰(zhàn) (1914液壓傳動廣泛應(yīng)用，特別是 1920 年以后，發(fā)展。

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3、液壓系統(tǒng) 一個完整的液壓系統(tǒng)由五個部分組成，即動力元件、執(zhí)行元件、控制元件、無件和液壓油。動力元件的作用是將原動機的機械能轉(zhuǎn)換成液體的壓力能，指液壓系統(tǒng)中的油泵，它向整個液壓系統(tǒng)提供動力。液壓泵的結(jié)構(gòu)形式一般有齒輪泵、葉片泵和柱塞泵。執(zhí)行元件(如液壓缸和液壓馬達)的作用是將液體的壓力能轉(zhuǎn)換為機械能，驅(qū)動負載作直線往復(fù)運動或回轉(zhuǎn)運動。 控制元件(即各種液壓閥)在液壓系統(tǒng)中控制和調(diào)節(jié)液體的壓力、流量和。

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5、液壓系統(tǒng) 液壓傳動和氣壓傳動稱為流體傳動，是根據(jù) 17 世紀帕斯卡提出的液體靜壓力傳動原理而發(fā)展起來的一門新興技術(shù)， 1795 年英國約瑟夫布拉曼 (749在倫敦用水作為工作介質(zhì)，以水壓機的形式將其應(yīng)用于工業(yè)上，誕生了世界上第一臺水壓機。 1905 年將工作介質(zhì)水改為油，又進一步得到改善。 第一次世界大戰(zhàn) (1914液壓傳動廣泛應(yīng)用，特別是 1920 年以后，發(fā)展更為迅速。液壓元件大約在 19 世紀末 20 世紀初的 20 年間，才開始進入正規(guī)的工業(yè)生產(chǎn)階段。 1925 年 維克斯 (明了壓力平衡式葉片泵 ,為近代液壓元件工業(yè)或液壓傳動的逐步建立奠定了。

6、附錄一 外文譯文 視頻監(jiān)控系統(tǒng)是安全防范系統(tǒng)的重要組成部分，是一種防范能力較強的綜合系統(tǒng)。視頻監(jiān)控以其直觀、方便、信息內(nèi)容豐富而廣泛應(yīng)用于許多場合。近年來，隨著現(xiàn)代科學(xué)技術(shù)的不斷發(fā)展特別是網(wǎng)絡(luò)帶寬、計算機處理能力和存儲容量的迅速提高一級各種實用視頻信息處理技術(shù)的出現(xiàn)，視頻監(jiān)控技術(shù)也有長足的發(fā)展，視頻監(jiān)控進入了全數(shù)字化的網(wǎng)絡(luò)時代，日益受到人們的重視和關(guān)注。視頻監(jiān)控系統(tǒng)的發(fā)展基本上是從早期的模擬閉路電。

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8、一、 可編程控制器是 60年代末在美國首先出現(xiàn)的，當時叫可編程邏輯控制器 目的是用來取代繼電器。以執(zhí)行邏輯判斷、計時、計數(shù)等順序控制功能。提出 活、通用等優(yōu)點和繼電器控制系統(tǒng)的簡單易懂、操作方便、價格便宜等優(yōu)點結(jié)合起來，控制器的硬件是標準的、通用的。根據(jù)實際應(yīng)用對象，將控制內(nèi)容編成軟件寫入控制器的用戶程序存儲器內(nèi) ,使控制器和被控對象連接方便。 70年代中期以后， 入輸出模塊和外圍電路也都采用了中、大規(guī)模甚至超大規(guī)模的集成電路，這時的 斷功能，還同時具有數(shù)據(jù)處理、 際電工委員會 (布的可編程控制器標準草案中對可。

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10、1液壓制動系統(tǒng)當踩下制動踏板，您希望該車輛停下。液壓制動踏板控制兩個部分。首先，在液壓作用下，由于采用細小的軟管或金屬線因此不必占用很大的空間。其次，液壓機構(gòu)提供了一個很大的優(yōu)勢，由一個很小的力踩在制動踏板上，會產(chǎn)生很大的力作用于車輪上。制動踏板連接在充滿制動液的制動液壓缸的活塞上，液壓缸由活塞和油箱組成?，F(xiàn)代主缸其實是兩個獨立的腔體。這種結(jié)構(gòu)稱之為雙回路系統(tǒng)，因為前腔連接到前制動器與后腔連接到后制動器。（有些車輛是對角連接）。兩個腔實際是分離的，允許緊急制動時一個系統(tǒng)失效另一個系統(tǒng)起作用。整個。

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14、1 附 錄 1 什么是液壓？ 一個完整的液壓系統(tǒng)由五個部分組成，即動力元件、執(zhí)行元件、控制元件、無件和液壓油。動力元件的作用是將原動機的機械能轉(zhuǎn)換成液壓體的壓力能，指液壓系統(tǒng)中的油泵，它向整個液壓系統(tǒng)提供動力。液壓泵的結(jié)構(gòu)形式一般有齒輪泵、葉片泵和柱塞泵。執(zhí)行元件（如液壓缸和液壓馬達）的作用是將液體的壓力能轉(zhuǎn)換為機械能，驅(qū)動負載作直線往復(fù)運動或回轉(zhuǎn)運動?？刂圃锤鞣N液壓閥）在液壓系統(tǒng)中控制和調(diào)節(jié)液體的壓力、流量和方向。根據(jù)控制功能不同，液壓閥可分為壓力控制閥、流量控制閥和方向控制閥。壓力控制閥又分。

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16、0 附件 1 熱軋工藝 該軋機的主要功能是 將半成品鋼重新加熱到接近其熔點， 然后通過由共計 的大功率連續(xù)滾動驅(qū)動馬力發(fā)動機帶動的 12 道連續(xù)軋制使鋼板變得更薄更長，最后卷曲被拉長的鋼板以運輸?shù)较乱坏拦ば颉?熱軋板卷的重量高達 30 噸至 30” 和 74” 。 將 8 至 9 英寸厚 、 36 英尺長的鋼板被卷成薄如 16 英寸和 1 / 2 英里長的帶鋼。 線圈 由兩 個內(nèi)徑（ 眼睛 ） 為 30” 卷取機， 外徑上限分別為 72”和 74” 分別與 850 和 1000 磅每英寸寬（ 相對應(yīng)的兩個卷曲機產(chǎn)生。該廠為每一個 供售后業(yè)務(wù)，以及負責運輸成品 給 客。 大 部分。