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零(ling)部件(jian)加(jia)工(gong)(gong)(gong)(gong)精(jing)度(du)(du)的(de)(de)影(ying)響問題，在液壓(ya)缸(gang)(gang)的(de)(de)制(zhi)造(zao)過程(cheng)(cheng)(cheng)中應嚴格控制(zhi)缸(gang)(gang)體(ti)(ti)(ti)內壁和活塞桿表面(mian)加(jia)工(gong)(gong)(gong)(gong)精(jing)度(du)(du)，特(te)別(bie)是(shi)幾(ji)何(he)精(jing)度(du)(du)，尤(you)其直線度(du)(du)是(shi)關鍵，在國(guo)內加(jia)工(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)藝中，HSG型工(gong)(gong)(gong)(gong)程(cheng)(cheng)(cheng)用(yong)液壓(ya)缸(gang)(gang)廠，活塞桿表面(mian)的(de)(de)加(jia)工(gong)(gong)(gong)(gong)基本上是(shi)車后磨(mo)(mo)削(xue)(xue)(xue)，保證直線度(du)(du)問題不(bu)(bu)大(da)，HSG型工(gong)(gong)(gong)(gong)程(cheng)(cheng)(cheng)用(yong)液壓(ya)缸(gang)(gang)定制(zhi)，但(dan)對(dui)于缸(gang)(gang)體(ti)(ti)(ti)內壁的(de)(de)加(jia)工(gong)(gong)(gong)(gong)，其加(jia)工(gong)(gong)(gong)(gong)方法很多，有(you)(you)鏜削(xue)(xue)(xue)-滾(gun)壓(ya)、鏜削(xue)(xue)(xue)-珩(heng)磨(mo)(mo)、直接珩(heng)磨(mo)(mo)等，HSG型工(gong)(gong)(gong)(gong)程(cheng)(cheng)(cheng)用(yong)液壓(ya)缸(gang)(gang)價格，但(dan)由于國(guo)內材(cai)料的(de)(de)基礎水平較國(guo)外有(you)(you)差距，管材(cai)坯料直線度(du)(du)差，壁厚不(bu)(bu)均勻、硬度(du)(du)不(bu)(bu)均勻等因素，往往直接影(ying)響缸(gang)(gang)體(ti)(ti)(ti)內壁加(jia)工(gong)(gong)(gong)(gong)后的(de)(de)直線度(du)(du)，因此(ci)建議采用(yong)鏜削(xue)(xue)(xue)-滾(gun)壓(ya)、鏜削(xue)(xue)(xue)-珩(heng)磨(mo)(mo)工(gong)(gong)(gong)(gong)藝，如直接珩(heng)磨(mo)(mo)，則必須首先提高管材(cai)坯料的(de)(de)直線度(du)(du)。

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　　在(zai)允許的(de)情況(kuang)下，液(ye)壓缸(gang)的(de)缸(gang)體(ti)壁厚安全系(xi)數盡量選大一些，使(shi)缸(gang)體(ti)厚壁增加，特別(bie)是(shi)高(gao)壓工況(kuang)下使(shi)用的(de)油(you)缸(gang)，以減小油(you)壓下的(de)缸(gang)體(ti)變形，變形后的(de)缸(gang)體(ti)也會引起(qi)液(ye)壓缸(gang)低速爬(pa)行。

(1)液壓缸(gang)內部泄漏(lou)。液壓缸(gang)內部泄漏(lou)包括液壓缸(gang)體密封(feng)、活(huo)塞桿與密封(feng)蓋密封(feng)及活(huo)塞密封(feng)均磨損過量(liang)等引起(qi)的泄漏(lou)。

活塞桿(gan)與密(mi)封(feng)蓋密(mi)封(feng)泄漏的原因(yin)是，臨(lin)沭HSG型(xing)工程用(yong)液壓缸(gang)，密(mi)封(feng)件折皺、擠壓、撕裂、磨(mo)損、老化、變質、變形等，此時應更換新的密(mi)封(feng)件。

活塞密封過(guo)量磨損的主要(yao)原因是(shi)速度控(kong)制閥調節不(bu)當，造成(cheng)過(guo)高的背壓(ya)以及(ji)密封件安裝(zhuang)不(bu)當或液(ye)壓(ya)油污(wu)染。

擺動式液壓缸

擺(bai)(bai)(bai)動(dong)(dong)(dong)式(shi)(shi)液壓缸(gang)是(shi)輸(shu)出扭矩并(bing)實現往復運(yun)(yun)(yun)動(dong)(dong)(dong)的(de)執行元件，有單(dan)葉(xie)片(pian)(pian)(pian)、雙(shuang)葉(xie)片(pian)(pian)(pian)、螺(luo)旋(xuan)(xuan)擺(bai)(bai)(bai)動(dong)(dong)(dong)等幾種形式(shi)(shi)。葉(xie)片(pian)(pian)(pian)式(shi)(shi)式(shi)(shi)：定(ding)子(zi)塊固定(ding)在缸(gang)體上，而葉(xie)片(pian)(pian)(pian)和(he)(he)轉子(zi)連接在一起。根據進油方(fang)向，葉(xie)片(pian)(pian)(pian)將帶動(dong)(dong)(dong)轉子(zi)作往復擺(bai)(bai)(bai)動(dong)(dong)(dong)。螺(luo)旋(xuan)(xuan)擺(bai)(bai)(bai)動(dong)(dong)(dong)式(shi)(shi)又(you)分單(dan)螺(luo)旋(xuan)(xuan)擺(bai)(bai)(bai)動(dong)(dong)(dong)和(he)(he)雙(shuang)螺(luo)旋(xuan)(xuan)兩種，現在雙(shuang)螺(luo)旋(xuan)(xuan)比較(jiao)常用，靠兩個螺(luo)旋(xuan)(xuan)副降液壓缸(gang)內活塞的(de)直(zhi)線(xian)運(yun)(yun)(yun)動(dong)(dong)(dong)轉變為直(zhi)線(xian)運(yun)(yun)(yun)動(dong)(dong)(dong)與(yu)自轉運(yun)(yun)(yun)動(dong)(dong)(dong)的(de)復he運(yun)(yun)(yun)動(dong)(dong)(dong)，從而實現擺(bai)(bai)(bai)動(dong)(dong)(dong)運(yun)(yun)(yun)動(dong)(dong)(dong)。