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擺動式液壓缸

擺(bai)(bai)動(dong)(dong)(dong)(dong)(dong)式(shi)(shi)液壓缸(gang)是輸出(chu)扭矩(ju)并實現往復運(yun)(yun)動(dong)(dong)(dong)(dong)(dong)的(de)執行元(yuan)件(jian)，有(you)單葉(xie)(xie)片、雙(shuang)(shuang)葉(xie)(xie)片、螺(luo)(luo)旋(xuan)擺(bai)(bai)動(dong)(dong)(dong)(dong)(dong)等幾種形式(shi)(shi)。葉(xie)(xie)片式(shi)(shi)式(shi)(shi)：定(ding)子塊固定(ding)在缸(gang)體上(shang)，而(er)葉(xie)(xie)片和轉子連接(jie)在一起。根據(ju)進油方向，葉(xie)(xie)片將帶(dai)動(dong)(dong)(dong)(dong)(dong)轉子作(zuo)往復擺(bai)(bai)動(dong)(dong)(dong)(dong)(dong)。螺(luo)(luo)旋(xuan)擺(bai)(bai)動(dong)(dong)(dong)(dong)(dong)式(shi)(shi)又分單螺(luo)(luo)旋(xuan)擺(bai)(bai)動(dong)(dong)(dong)(dong)(dong)和雙(shuang)(shuang)螺(luo)(luo)旋(xuan)兩種，現在雙(shuang)(shuang)螺(luo)(luo)旋(xuan)比較(jiao)常用，靠兩個螺(luo)(luo)旋(xuan)副降液壓缸(gang)內活塞的(de)直線(xian)運(yun)(yun)動(dong)(dong)(dong)(dong)(dong)轉變為直線(xian)運(yun)(yun)動(dong)(dong)(dong)(dong)(dong)與自(zi)轉運(yun)(yun)動(dong)(dong)(dong)(dong)(dong)的(de)復he運(yun)(yun)動(dong)(dong)(dong)(dong)(dong)，從而(er)實現擺(bai)(bai)動(dong)(dong)(dong)(dong)(dong)運(yun)(yun)動(dong)(dong)(dong)(dong)(dong)。

3、活塞滑移或爬(pa)行

液壓缸的活塞滑移或爬行將使(shi)液壓缸工作不穩(wen)定(ding)。主要原因如下：

(1)液(ye)(ye)壓(ya)(ya)缸(gang)內部澀滯。液(ye)(ye)壓(ya)(ya)缸(gang)內部零(ling)件裝(zhuang)配不當、零(ling)件變(bian)形、磨(mo)損或形位公差超限，動作(zuo)阻力(li)過(guo)大，使(shi)液(ye)(ye)壓(ya)(ya)缸(gang)活(huo)塞速(su)度隨(sui)著(zhu)行程位置(zhi)的不同而變(bian)化，出現(xian)滑移(yi)或爬行。原(yuan)因大多是由于零(ling)件裝(zhuang)配質量差，表面有傷痕或燒(shao)結產生(sheng)的鐵(tie)屑(xie)，使(shi)阻力(li)增(zeng)大，速(su)度下降。

現象（一）：機械損傷

原因：

1.在配合面(mian)上有傷痕

2.含(han)有金屬類雜物或其它雜質

3.裝(zhuang)配時配合面倒角處有毛(mao)刺

防止措施：

1.裝配前檢查，清洗干(gan)凈零件，不允(yun)許有任何雜質(zhi)進入

2.改善(shan)系(xi)統(tong)過濾裝置，按時更換系(xi)統(tong)介質

3.加大配合面的倒角，并(bing)使之盡量光滑，去掉毛刺(ci)和飛邊

原因：

1.配合間隙設(she)計過(guo)大

2.系統壓力(li)過高

3.支撐環剛度(du)不夠產(chan)生間隙

防止措施：

1.減少(shao)配合(he)間隙

2.加支撐環

3.壓力過高(gao)，可(ke)增加一(yi)道緩沖密(mi)封

3.重(zhong)新選擇密封材料

4.更改支撐環材料或(huo)尺寸