【正文】 緒論 ...............................................................................................................................................................1 液壓系統(tǒng)在工程中的應用 ....................................................................................................................................1 液壓傳動的優(yōu)缺點 ................................................................................................................................................1 液壓系統(tǒng)的分類及液壓功能回路 的作用 ...........................................................................................................3 第二章 系統(tǒng)方案論證 ................................................................................................................................................6 液壓泵站的論證 ...................................................................................................................................................6 液壓執(zhí)行元件的方案論證 ...................................................................................................................................8 液壓控制部分的方案論證 ...................................................................................................................................8 電氣控制部分的方案論證 ................................................................................................................................ 10 系統(tǒng)原理圖的初步推論 .................................................................................................................................... 11 第三章 主要參數(shù)設計和元件選擇 ........................................................................................................................ 15 液壓執(zhí)行元件的設計計算 ................................................................................................................................. 15 計算系統(tǒng)的性能參數(shù) ........................................................................................................................................ 23 主要元件的選擇 ................................................................................................................................................ 27 第四章 液壓性能的驗算 ......................................................................................................................................... 32 武漢工程大學 畢業(yè)設計（論文） II 驗算壓力損失 ..................................................................................................................................................... 32 液壓系統(tǒng)溫升驗算 ............................................................................................................................................ 32 第五章 液壓裝置的結構設計 ................................................................................................................................. 34 液壓裝置的類型 ................................................................................................................................................ 34 液壓泵站的類型及其組件的選擇 ................................................................................................................... 34 油箱的結構設計 ............................................................................................................................................... 36 總結 ............................................................................................................................................................................... 38 致謝 ............................................................................................................................................................................... 40 參考文獻 ...................................................................................................................................................................... 41 武漢工程大學 畢業(yè)設計（論文） III 摘要 液壓系統(tǒng)已經(jīng)在各個工業(yè)部門及農林牧漁等許多部門得到愈來愈廣泛的應用 ,而越先進的設備 ,其應用液壓系統(tǒng)的部分也越多 ,因此 ,對于機械專業(yè)的人員來說 ,學好液壓技術 ,能熟練設計簡單的液壓系統(tǒng)是基本的專業(yè)要求。 關鍵詞 : 鋼管； 切斷； 液壓 武漢工程大學 畢業(yè)設計（論文） IV Abstract The hydraulic system has been in various industrial sectors and in many sectors such as agriculture, forestry, animal husbandry and fisheries are more widely used, and the more advanced equipment, its application is also part of the hydraulic system the more so, for machinery for professional staff, learn hydraulic technology, skilled design simple hydraulic system is the basic professional requirements. G30 Steel cut off the hydraulic system design, the principle is the use of hydraulic technology, steel cut in the saw blade to achieve fast forward, working forward, rewind and steel pipe clamp, pine folders and other processes, the entire cutting process automation. Hydraulic system design is mainly based on the hydraulic system of the machine, the hydraulic system than other systems have many advantages, and hydraulic technology to today has been very mature, easy to design, calculation, operation of the system. In the design of the hydraulic system, the first based on available data, bined with the desired objectives, the system demonstration program began, and then determined by calculating the initial parameters of the system, and then select the ponents required for the hydraulic system, then the related checking, the final checking the results to determine whether the system is based on reasonable and feasible. Keywords： Steel； cut off。其他在電力、建筑、水利、交通、船舶、航天、汽車等行業(yè)，液壓系 統(tǒng)也是重要的組成部分。 液壓傳動是用液體作為介質來傳遞能力的，液壓傳動與上述三種傳動比較有以下的優(yōu)點： 1) 易于獲得較大的力或力矩， 液壓傳動是利用液體的壓力來傳遞力或力矩的。功率重量比大的設備即重量和體積較小而能輸出較大的功率。液壓傳動通過調節(jié)液體流量就可以方便地實現(xiàn)無級調速，而且調速范圍大。 6) 可以實現(xiàn)快速而且無沖擊的變速和換向。 7) 與機械傳動相比易于布局和操縱，液壓傳動部件由管道相連，故安裝在位置上有很大的自由度，各部件可以安裝在我們希望的位子上。液壓傳動中使用的介質大都為礦物油，它對液壓部件產生潤滑作用，因此液壓元件有自潤滑作用，其壽命就較長。 武漢工程大學 畢業(yè)設計（論文） 3 1) 容易出現(xiàn)泄露。 3) 空氣滲入液壓油后會引起爬行 、振動、噪聲，空氣進入液壓系統(tǒng)后，由于氣體的壓縮性大，所以低壓到高壓或從高壓到底壓，就會產生較大的體積變化、噪聲和爬行等。 液壓系統(tǒng)的分類及液壓功能回路的作用 按液壓系統(tǒng)的應用場合分類 這是最簡單的分類方法，如農業(yè)用液壓