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　液(ye)(ye)壓(ya)系(xi)統(tong)是控制離合(he)器、剎車、換(huan)檔等(deng),將(jiang)液(ye)(ye)體的壓(ya)力能(neng)轉換(huan)為機械能(neng)。液(ye)(ye)壓(ya)系(xi)統(tong)由六(liu)個部分組(zu)成:

　　能(neng)(neng)源裝置(zhi)(zhi)部(bu)(bu)分(fen):把(ba)機械能(neng)(neng)轉(zhuan)換成(cheng)流(liu)體(ti)的(de)(de)(de)壓(ya)(ya)(ya)力能(neng)(neng)的(de)(de)(de)裝置(zhi)(zhi),一(yi)(yi)般(ban)指的(de)(de)(de)就是(shi)(shi)液(ye)壓(ya)(ya)(ya)泵了(le),要是(shi)(shi)氣動(dong)(dong)就是(shi)(shi)空氣壓(ya)(ya)(ya)縮機。也就是(shi)(shi)動(dong)(dong)力部(bu)(bu)分(fen)。執行裝置(zhi)(zhi)部(bu)(bu)分(fen):把(ba)流(liu)體(ti)的(de)(de)(de)壓(ya)(ya)(ya)力轉(zhuan)換成(cheng)機械能(neng)(neng)的(de)(de)(de)裝置(zhi)(zhi),一(yi)(yi)般(ban)指的(de)(de)(de)是(shi)(shi)液(ye)壓(ya)(ya)(ya)缸和液(ye)壓(ya)(ya)(ya)馬達吧。控制調(diao)節(jie)裝置(zhi)(zhi)部(bu)(bu)分(fen):對液(ye)壓(ya)(ya)(ya)系統(tong)中流(liu)體(ti)的(de)(de)(de)壓(ya)(ya)(ya)力、流(liu)量和流(liu)動(dong)(dong)方向進行控制和調(diao)節(jie)不裝置(zhi)(zhi)部(bu)(bu)分(fen),如溢流(liu)閥、節(jie)流(liu)閥、換向閥等。輔助(zhu)裝置(zhi)(zhi)部(bu)(bu)分(fen):除了(le)上(shang)面的(de)(de)(de)3項以外,如油箱(xiang)、過濾器、蓄能(neng)(neng)器等。傳動(dong)(dong)介質:傳遞(di)能(neng)(neng)量的(de)(de)(de)介質。液(ye)壓(ya)(ya)(ya)油:組(zu)成(cheng)液(ye)壓(ya)(ya)(ya)系統(tong)的(de)(de)(de)一(yi)(yi)個組(zu)成(cheng)部(bu)(bu)分(fen),液(ye)壓(ya)(ya)(ya)油一(yi)(yi)般(ban)不會歸到輔助(zhu)裝置(zhi)(zhi)。

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.對靜(jing)密(mi)(mi)封(feng)(feng)(feng)件的(de)(de)要(yao)求(qiu)。靜(jing)密(mi)(mi)封(feng)(feng)(feng)件在剛性(xing)固定(ding)表(biao)面之(zhi)間防止(zhi)油液外泄。合(he)理(li)設計密(mi)(mi)封(feng)(feng)(feng)槽尺寸(cun)及(ji)公(gong)差,使安(an)裝后的(de)(de)密(mi)(mi)封(feng)(feng)(feng)件到(dao)一定(ding)擠壓(ya)產生變(bian)形(xing)以(yi)便(bian)填塞配(pei)合(he)表(biao)面的(de)(de)微(wei)觀凹陷,并把(ba)密(mi)(mi)封(feng)(feng)(feng)件內應力提(ti)高到(dao)高于被密(mi)(mi)封(feng)(feng)(feng)的(de)(de)壓(ya)力。隨著配(pei)合(he)表(biao)面的(de)(de)運(yun)動(dong)(dong),靜(jing)密(mi)(mi)封(feng)(feng)(feng)就成了(le)動(dong)(dong)密(mi)(mi)封(feng)(feng)(feng)。粗糙的(de)(de)配(pei)合(he)表(biao)面將(jiang)磨損密(mi)(mi)封(feng)(feng)(feng)件,變(bian)動(dong)(dong)的(de)(de)間隙將(jiang)蠶(can)食密(mi)(mi)封(feng)(feng)(feng)件邊緣。

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.合(he)理設計安裝板。當閥組(zu)或底板用螺栓固定(ding)在安裝面(mian)上(shang)時,為了得到(dao)滿意的(de)(de)初始密(mi)(mi)封和(he)防止密(mi)(mi)封件被(bei)擠(ji)出溝槽和(he)被(bei)磨(mo)損,安裝面(mian)要(yao)平(ping)直,密(mi)(mi)封面(mian)要(yao)求精加工,表面(mian)粗(cu)糙度(du)要(yao)達到(dao)0.8μm,平(ping)面(mian)度(du)要(yao)達到(dao)0.01/100mm。表面(mian)不(bu)能有(you)徑(jing)向劃(hua)痕,連(lian)接螺釘(ding)的(de)(de)預緊力要(yao)足(zu)夠大,以防止表面(mian)分離。

   對(dui)機械化施工(gong)(gong)企(qi)業來說，工(gong)(gong)程機械技(ji)術狀況的(de)(de)(de)良(liang)好與否是(shi)(shi)企(qi)業能否正常生產的(de)(de)(de)直接因素(su)。就(jiu)(jiu)液(ye)壓傳動的(de)(de)(de)工(gong)(gong)程機械而言，液(ye)壓系統的(de)(de)(de)正常運行(xing)(xing)是(shi)(shi)其(qi)良(liang)好技(ji)術狀況的(de)(de)(de)一(yi)個主要標志。合(he)格(ge)的(de)(de)(de)液(ye)壓油是(shi)(shi)液(ye)壓系統可(ke)靠運行(xing)(xing)的(de)(de)(de)保障(zhang)，正確(que)的(de)(de)(de)維(wei)護是(shi)(shi)液(ye)壓系統可(ke)靠運行(xing)(xing)的(de)(de)(de)根本。為此，本人根據工(gong)(gong)作(zuo)實踐，就(jiu)(jiu)一(yi)般作(zuo)業環境中工(gong)(gong)程機械液(ye)壓系統的(de)(de)(de)維(wei)護作(zuo)一(yi)粗略的(de)(de)(de)探(tan)討。

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　　選擇適合的液(ye)壓油

　　液(ye)(ye)壓(ya)(ya)(ya)(ya)油(you)(you)在液(ye)(ye)壓(ya)(ya)(ya)(ya)系(xi)統中起(qi)著傳遞壓(ya)(ya)(ya)(ya)力、潤滑、冷卻、密封的作(zuo)用(yong)(yong)，液(ye)(ye)壓(ya)(ya)(ya)(ya)油(you)(you)選(xuan)擇不(bu)恰當是(shi)液(ye)(ye)壓(ya)(ya)(ya)(ya)系(xi)統早期(qi)故(gu)障和耐久(jiu)性(xing)(xing)下降的主要原因(yin)。應(ying)按隨機《使(shi)用(yong)(yong)說明書》中規定的牌號(hao)(hao)選(xuan)擇液(ye)(ye)壓(ya)(ya)(ya)(ya)油(you)(you)，特殊(shu)情況需(xu)要使(shi)用(yong)(yong)代用(yong)(yong)油(you)(you)時，應(ying)力求(qiu)其(qi)性(xing)(xing)能(neng)(neng)與原牌號(hao)(hao)性(xing)(xing)能(neng)(neng)相同。不(bu)同牌號(hao)(hao)的液(ye)(ye)壓(ya)(ya)(ya)(ya)油(you)(you)不(bu)能(neng)(neng)混合使(shi)用(yong)(yong)，以防液(ye)(ye)壓(ya)(ya)(ya)(ya)油(you)(you)產(chan)生化(hua)學反應(ying)、性(xing)(xing)能(neng)(neng)發生變化(hua)。深褐色(se)、乳白色(se)、有異味(wei)的液(ye)(ye)壓(ya)(ya)(ya)(ya)油(you)(you)是(shi)變質油(you)(you)，不(bu)能(neng)(neng)使(shi)用(yong)(yong)。