MPC240

MPC240

液壓系統(tǒng)原理圖就是用圖形符號來表示液壓技術(shù)領(lǐng)域的圖形，就像機械制圖一樣，目的是便于閱讀、分析、設(shè)計和繪制，用規(guī)定的元件圖形符號和線條來表達(dá)液壓系統(tǒng)工作原理。

一個完整的液壓系統(tǒng)原理圖由工作介質(zhì)、動力部分、執(zhí)行部分、控制部分、輔助部分共五部分組成，工作原理是液壓油在封閉的系統(tǒng)中進行了兩次能量轉(zhuǎn)換，靜壓力能和機械能的轉(zhuǎn)換，而轉(zhuǎn)換的過程是由控制元件完成的。

(1)了解液壓系統(tǒng)的用途，將液壓系統(tǒng)原理圖依次分成執(zhí)行元件、動力元件、控制元件三大塊，再根據(jù)主機要求，掌握執(zhí)行元件的動作及要求。

(2弄清楚各種液壓元件的類型，性能，相互間的聯(lián)系和功用。先弄清楚動力元件的種類:單泵，多泵;定量，變量;單供，合流;再閱讀明白液壓缸或液壓馬達(dá);再次閱讀并了解各種控制裝置及變量機構(gòu);后閱讀和掌握輔助裝置。在此基礎(chǔ)上，根據(jù)工作循環(huán)和工作性能要求分析將系統(tǒng)分為對應(yīng)數(shù)量的基本回路，并在液壓傳動原理圖上逐一地查找出每個回路。

(3)按照工作循環(huán)表，仔細(xì)分析并依次寫出完成各個動作的相應(yīng)進油路油和回頭路液流經(jīng)路線。為了便于分析，在分析之前好將液壓系統(tǒng)中的每個液壓原件和各條油路編上號碼。這樣，對分析復(fù)雜油路，動作較多的系統(tǒng)尤為重要。寫油液流經(jīng)路線時要分清主油路和控制油路。對主油路，應(yīng)從液壓泵開始寫，一直寫到執(zhí)行元件，這就構(gòu)成了進油路線;然后再從執(zhí)行元件回油寫到油箱閉式系統(tǒng)回到液壓泵。這樣分析，目標(biāo)明確，不易混亂。

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