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3、活塞滑移或爬行

液(ye)壓(ya)缸的活塞滑移(yi)或爬行將使液(ye)壓(ya)缸工作不穩定。主要原因如下：

(1)液壓(ya)(ya)(ya)缸(gang)內部澀滯。液壓(ya)(ya)(ya)缸(gang)內部零件裝(zhuang)(zhuang)配不當、零件變形、磨損(sun)或形位公差超限，動(dong)作阻力過大，使液壓(ya)(ya)(ya)缸(gang)活塞(sai)速度(du)隨著行程位置的不同而變化，冶(ye)金(jin)設(she)備液壓(ya)(ya)(ya)缸(gang)生(sheng)(sheng)產，出現滑(hua)移或爬行。原因大多是(shi)由于零件裝(zhuang)(zhuang)配質量差，表面有傷痕或燒結產生(sheng)(sheng)的鐵屑，液壓(ya)(ya)(ya)缸(gang)生(sheng)(sheng)產，使阻力增大，速度(du)下降。

液壓缸的分類

液(ye)壓(ya)缸的結構(gou)形式(shi)(shi)(shi)多(duo)(duo)種(zhong)多(duo)(duo)樣，其分(fen)類方(fang)法(fa)也(ye)有多(duo)(duo)種(zhong)：按(an)運動(dong)方(fang)式(shi)(shi)(shi)可(ke)分(fen)為(wei)直線往復運動(dong)式(shi)(shi)(shi)和回(hui)轉擺動(dong)式(shi)(shi)(shi)；按(an)受液(ye)壓(ya)力作用情(qing)況可(ke)分(fen)為(wei)單作用式(shi)(shi)(shi)、雙作用式(shi)(shi)(shi)；按(an)結構(gou)形式(shi)(shi)(shi)可(ke)分(fen)為(wei)活塞式(shi)(shi)(shi)、柱(zhu)塞式(shi)(shi)(shi)、多(duo)(duo)級伸縮套筒式(shi)(shi)(shi)，齒(chi)輪齒(chi)條(tiao)式(shi)(shi)(shi)等；按(an)安(an)裝形式(shi)(shi)(shi)可(ke)分(fen)為(wei)拉(la)桿(gan)、耳(er)環、底腳、鉸軸等；按(an)壓(ya)力等級可(ke)分(fen)為(wei)16Mpa、25Mpa、31.5Mpa等。（威海力建冶金液(ye)壓(ya)設備廠）

零部件加(jia)工(gong)(gong)(gong)(gong)精(jing)(jing)度(du)(du)(du)(du)的(de)影響問題，在液壓缸(gang)(gang)的(de)制造過程中(zhong)(zhong)應嚴格控制缸(gang)(gang)體內(nei)壁(bi)和活塞桿(gan)表(biao)面(mian)加(jia)工(gong)(gong)(gong)(gong)精(jing)(jing)度(du)(du)(du)(du)，特別(bie)是(shi)幾何精(jing)(jing)度(du)(du)(du)(du)，尤其直(zhi)線度(du)(du)(du)(du)是(shi)關(guan)鍵(jian)，工(gong)(gong)(gong)(gong)程用(yong)液壓缸(gang)(gang)生產，在國(guo)內(nei)加(jia)工(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)藝(yi)(yi)中(zhong)(zhong)，活塞桿(gan)表(biao)面(mian)的(de)加(jia)工(gong)(gong)(gong)(gong)基本上是(shi)車后(hou)磨(mo)(mo)削，保證直(zhi)線度(du)(du)(du)(du)問題不大，但對于缸(gang)(gang)體內(nei)壁(bi)的(de)加(jia)工(gong)(gong)(gong)(gong)，其加(jia)工(gong)(gong)(gong)(gong)方法很多，有(you)鏜削-滾(gun)壓、鏜削-珩磨(mo)(mo)、直(zhi)接珩磨(mo)(mo)等，但由于國(guo)內(nei)材(cai)料的(de)基礎水平較國(guo)外(wai)有(you)差(cha)(cha)距，管(guan)材(cai)坯(pi)料直(zhi)線度(du)(du)(du)(du)差(cha)(cha)，壁(bi)厚不均勻、硬度(du)(du)(du)(du)不均勻等因(yin)素，往往直(zhi)接影響缸(gang)(gang)體內(nei)壁(bi)加(jia)工(gong)(gong)(gong)(gong)后(hou)的(de)直(zhi)線度(du)(du)(du)(du)，因(yin)此(ci)建議采用(yong)鏜削-滾(gun)壓、鏜削-珩磨(mo)(mo)工(gong)(gong)(gong)(gong)藝(yi)(yi)，如直(zhi)接珩磨(mo)(mo)，則必須(xu)首先(xian)提高管(guan)材(cai)坯(pi)料的(de)直(zhi)線度(du)(du)(du)(du)。

上述圖(tu)片僅供(gong)參考，詳細(xi)產品詳情請咨詢我(wo)(wo)們，更多(duo)型號請訪問我(wo)(wo)們的(de)網(wang)站或致電(dian)我(wo)(wo)們了解'。謝謝

　　在允許(xu)的情況下，CDCG250系(xi)列重(zhong)載液壓(ya)(ya)缸(gang)生產，液壓(ya)(ya)缸(gang)的缸(gang)體(ti)壁(bi)厚安全系(xi)數盡量選大一些，使缸(gang)體(ti)厚壁(bi)增加，特別是高壓(ya)(ya)工況下使用的油缸(gang)，以減(jian)小油壓(ya)(ya)下的缸(gang)體(ti)變形，變形后的缸(gang)體(ti)也會引起(qi)液壓(ya)(ya)缸(gang)低(di)速爬(pa)行。