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3、活塞滑(hua)移(yi)或爬行(xing)

 液壓(ya)缸的活塞滑移或爬行(xing)將使液壓(ya)缸工作不穩(wen)定。主(zhu)要原因如下：

(1)液(ye)壓(ya)缸內部澀滯。液(ye)壓(ya)缸內部零(ling)件(jian)裝(zhuang)配不(bu)當(dang)、零(ling)件(jian)變(bian)形(xing)、磨損(sun)或形(xing)位公(gong)差超限，動作阻(zu)(zu)力過大，使液(ye)壓(ya)缸活塞速度隨著行程位置的(de)不(bu)同(tong)而變(bian)化，出現滑(hua)移或爬行。原因大多是(shi)由于零(ling)件(jian)裝(zhuang)配質量(liang)差，表(biao)面有(you)傷痕或燒結產生(sheng)的(de)鐵屑(xie)，使阻(zu)(zu)力增(zeng)大，速度下降。

液壓缸(gang)(gang)結構基本上(shang)可以分(fen)為缸(gang)(gang)筒(tong)和(he)缸(gang)(gang)蓋、活(huo)塞和(he)活(huo)塞桿、密(mi)封裝(zhuang)(zhuang)置(zhi)、緩沖裝(zhuang)(zhuang)置(zhi)和(he)排氣裝(zhuang)(zhuang)置(zhi)五(wu)個部分(fen)。今天威(wei)海力建(jian)小(xiao)編著重帶著大家了解一(yi)下(xia)缸(gang)(gang)筒(tong)和(he)缸(gang)(gang)蓋。

 缸筒(tong)和(he)缸蓋

一般來說，缸筒(tong)(tong)和(he)(he)缸蓋的(de)結(jie)構形(xing)式(shi)(shi)和(he)(he)其使用(yong)(yong)的(de)材料有(you)關。工(gong)(gong)(gong)作壓(ya)力p＜10MPa時(shi)，使用(yong)(yong)鑄鐵；p＜20MPa時(shi)，使用(yong)(yong)無縫鋼(gang)(gang)管(guan)；p＞20MPa時(shi)，使用(yong)(yong)鑄鋼(gang)(gang)或鍛(duan)鋼(gang)(gang)。法蘭連(lian)接式(shi)(shi)，結(jie)構簡單(dan)，容(rong)(rong)易加工(gong)(gong)(gong)，也容(rong)(rong)易裝(zhuang)拆，但外(wai)(wai)形(xing)尺(chi)寸(cun)和(he)(he)重(zhong)量(liang)都較大(da)，常用(yong)(yong)于鑄鐵制(zhi)的(de)缸筒(tong)(tong)上。半環連(lian)接式(shi)(shi)，它(ta)的(de)缸筒(tong)(tong)壁部(bu)因開了環形(xing)槽而削弱(ruo)了強度，為此有(you)時(shi)要加厚缸壁，它(ta)容(rong)(rong)易加工(gong)(gong)(gong)和(he)(he)裝(zhuang)拆，重(zhong)量(liang)較輕，常用(yong)(yong)于無縫鋼(gang)(gang)管(guan)或鍛(duan)鋼(gang)(gang)制(zhi)的(de)缸筒(tong)(tong)上。螺紋連(lian)接式(shi)(shi)，它(ta)的(de)缸筒(tong)(tong)端(duan)部(bu)結(jie)構復雜，外(wai)(wai)徑(jing)加工(gong)(gong)(gong)時(shi)要求保證(zheng)內外(wai)(wai)徑(jing)同心(xin)，裝(zhuang)拆要使用(yong)(yong)工(gong)(gong)(gong)具，它(ta)的(de)外(wai)(wai)形(xing)尺(chi)寸(cun)和(he)(he)重(zhong)量(liang)都較小，常用(yong)(yong)于無縫鋼(gang)(gang)管(guan)或鑄鋼(gang)(gang)制(zhi)的(de)缸筒(tong)(tong)上。拉桿(gan)連(lian)接式(shi)(shi)，結(jie)構的(de)通用(yong)(yong)性大(da)，容(rong)(rong)易加工(gong)(gong)(gong)和(he)(he)裝(zhuang)拆，但外(wai)(wai)形(xing)尺(chi)寸(cun)較大(da)，且較重(zhong)。焊接連(lian)接式(shi)(shi)，結(jie)構簡單(dan)，尺(chi)寸(cun)小，但缸底處內徑(jing)不(bu)易加工(gong)(gong)(gong)，且可能引起變形(xing)。

3、叉車叉架下降速度(du)太快

故障檢(jian)查：節流閥卡在打開(kai)位置(zhi)或裝反

故(gu)障排除：重(zhong)裝(zhuang)節流閥(fa)

4、叉車起升缸(gang)自由下滑量太(tai)大(da)或傾(qing)斜缸(gang)自傾(qing)角太(tai)大(da)

故障檢查：換向閥閥桿(gan)內泄漏太大，傾斜缸活塞密(mi)封圈(quan)失效內漏

故(gu)障(zhang)排(pai)除(chu)：更換閥桿或更換密(mi)封圈

5、液(ye)壓(ya)缸活(huo)塞桿(gan)帶油

故障檢查：油封是否損壞(huai)

故障排除：更(geng)換油封（威海力建冶金液壓設備(bei)廠推(tui)薦）