液(ye)壓(ya)缸有桿腔和無(wu)桿腔存有氣體而產生的低速爬行(xing)(xing)，可(ke)通過(guo)反(fan)復運行(xing)(xing)液(ye)壓(ya)缸達到排(pai)氣的目(mu)的，必要時在(zai)管路或(huo)液(ye)壓(ya)缸的兩腔設置排(pai)氣裝(zhuang)置，在(zai)液(ye)壓(ya)系統工作時進行(xing)(xing)排(pai)氣。

　　液壓缸內導(dao)向元件摩擦力不均勻產生(sheng)的(de)低速(su)爬(pa)行，建議優(you)先采(cai)(cai)用金(jin)屬(shu)作為導(dao)向支撐，如QT500-7、ZQAL9-4等，如采(cai)(cai)用非金(jin)屬(shu)支撐環，建議選用在油液中尺寸穩(wen)定性(xing)好的(de)非金(jin)屬(shu)支撐環，特(te)別是(shi)熱膨脹系數應小(xiao)，另外對支撐環的(de)厚度，必須嚴格控(kong)制尺寸公(gong)差(cha)和厚度的(de)均勻性(xing)。

　　零(ling)部件加(jia)工(gong)(gong)(gong)(gong)(gong)精度(du)(du)(du)的影(ying)響(xiang)問題，在(zai)液壓缸的制(zhi)造(zao)過程(cheng)中(zhong)應嚴(yan)格控制(zhi)缸體(ti)內(nei)(nei)壁(bi)(bi)(bi)和活塞(sai)桿表面加(jia)工(gong)(gong)(gong)(gong)(gong)精度(du)(du)(du)，特別是幾何(he)精度(du)(du)(du)，尤其直(zhi)(zhi)(zhi)線(xian)(xian)度(du)(du)(du)是關鍵，在(zai)國內(nei)(nei)加(jia)工(gong)(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)(gong)藝中(zhong)，活塞(sai)桿表面的加(jia)工(gong)(gong)(gong)(gong)(gong)基(ji)本上是車后磨(mo)(mo)削，保證(zheng)直(zhi)(zhi)(zhi)線(xian)(xian)度(du)(du)(du)問題不(bu)(bu)大，但(dan)對于缸體(ti)內(nei)(nei)壁(bi)(bi)(bi)的加(jia)工(gong)(gong)(gong)(gong)(gong)，其加(jia)工(gong)(gong)(gong)(gong)(gong)方法很多，有鏜削—滾壓、鏜削—珩(heng)磨(mo)(mo)、直(zhi)(zhi)(zhi)接珩(heng)磨(mo)(mo)等(deng)(deng)，但(dan)由于國內(nei)(nei)材(cai)料(liao)的基(ji)礎水平(ping)較(jiao)國外(wai)有差距，管材(cai)坯料(liao)直(zhi)(zhi)(zhi)線(xian)(xian)度(du)(du)(du)差，壁(bi)(bi)(bi)厚不(bu)(bu)均(jun)勻、硬(ying)度(du)(du)(du)不(bu)(bu)均(jun)勻等(deng)(deng)因素，往(wang)往(wang)直(zhi)(zhi)(zhi)接影(ying)響(xiang)缸體(ti)內(nei)(nei)壁(bi)(bi)(bi)加(jia)工(gong)(gong)(gong)(gong)(gong)后的直(zhi)(zhi)(zhi)線(xian)(xian)度(du)(du)(du)，因此建議(yi)采(cai)用鏜削—滾壓、鏜削—珩(heng)磨(mo)(mo)工(gong)(gong)(gong)(gong)(gong)藝，如直(zhi)(zhi)(zhi)接珩(heng)磨(mo)(mo)，則(ze)必須首先提高管材(cai)坯料(liao)的直(zhi)(zhi)(zhi)線(xian)(xian)度(du)(du)(du)。

　　對于密封(feng)(feng)(feng)件(jian)材質問題引起的(de)(de)液壓(ya)(ya)缸(gang)(gang)低速(su)爬行，建議在(zai)工況允許(xu)的(de)(de)條(tiao)件(jian)下(xia)，優(you)先采用(yong)以聚四氟乙烯作(zuo)為(wei)密封(feng)(feng)(feng)的(de)(de)組合密封(feng)(feng)(feng)圈，如(ru)常用(yong)的(de)(de)格萊(lai)圈、斯特(te)封(feng)(feng)(feng)等(deng)等(deng);如(ru)選唇(chun)口密封(feng)(feng)(feng)，建議材料優(you)選丁晴(qing)橡膠或類似材料的(de)(de)密封(feng)(feng)(feng)件(jian)，其跟隨(sui)性較好。 液壓(ya)(ya)缸(gang)(gang)的(de)(de)缸(gang)(gang)體(ti)(ti)壁厚在(zai)允許(xu)的(de)(de)情況下(xia)，安全系數盡(jin)量選大一些，使缸(gang)(gang)體(ti)(ti)厚壁增加，特(te)別是高(gao)壓(ya)(ya)工況下(xia)使用(yong)的(de)(de)油(you)缸(gang)(gang)，以減(jian)小(xiao)油(you)壓(ya)(ya)下(xia)的(de)(de)缸(gang)(gang)體(ti)(ti)變形(xing)，變形(xing)后的(de)(de)缸(gang)(gang)體(ti)(ti)也會引起液壓(ya)(ya)缸(gang)(gang)低速(su)爬行。