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房縣液壓密封件形式與材料的選擇

發布時(shi)間:2021-12-21 11:48:30 人氣:102554 來源:

  1、液壓密封件之形(xing)式選擇(ze)


  在液(ye)壓(ya)(ya)系統中,常見的密(mi)(mi)封(feng)(feng)形(xing)式有(you)擠壓(ya)(ya)型O形(xing)密(mi)(mi)封(feng)(feng)圈(quan)、Y形(xing)圈(quan)、V形(xing)圈(quan)、U形(xing)圈(quan)唇(chun)形(xing)密(mi)(mi)封(feng)(feng)。唇(chun)形(xing)密(mi)(mi)封(feng)(feng)圈(quan)主(zhu)要用于往(wang)復動(dong)密(mi)(mi)封(feng)(feng),與O形(xing)圈(quan)等擠壓(ya)(ya)密(mi)(mi)封(feng)(feng)相比,往(wang)復動(dong)密(mi)(mi)封(feng)(feng)使(shi)用唇(chun)形(xing)密(mi)(mi)封(feng)(feng)圈(quan)具有(you)更好(hao)的綜合性能和更長的使(shi)用壽命。


  唇(chun)形(xing)(xing)密(mi)(mi)封(feng)(feng)圈(quan)的(de)(de)(de)(de)密(mi)(mi)封(feng)(feng)壓(ya)(ya)緊(jin)力(li)(li)(li)(li)是隨介質(zhi)(zhi)壓(ya)(ya)力(li)(li)(li)(li)的(de)(de)(de)(de)改變(bian)而變(bian)化的(de)(de)(de)(de),工作中始(shi)終應監控介質(zhi)(zhi)壓(ya)(ya)力(li)(li)(li)(li)的(de)(de)(de)(de)變(bian)化,即能保證足(zu)夠的(de)(de)(de)(de)密(mi)(mi)封(feng)(feng)壓(ya)(ya)緊(jin)力(li)(li)(li)(li),又(you)不至(zhi)于產生(sheng)(sheng)過(guo)(guo)大(da)(da)的(de)(de)(de)(de)摩擦力(li)(li)(li)(li),擠(ji)壓(ya)(ya)性密(mi)(mi)封(feng)(feng)主要靠預壓(ya)(ya)緊(jin)力(li)(li)(li)(li)產生(sheng)(sheng)密(mi)(mi)封(feng)(feng)力(li)(li)(li)(li),密(mi)(mi)封(feng)(feng)圈(quan)接觸壓(ya)(ya)力(li)(li)(li)(li)預先給定(ding),工作中不能根(gen)據介質(zhi)(zhi)壓(ya)(ya)力(li)(li)(li)(li)的(de)(de)(de)(de)改變(bian)而變(bian)化。大(da)(da)的(de)(de)(de)(de)預壓(ya)(ya)力(li)(li)(li)(li)會(hui)使(shi)密(mi)(mi)封(feng)(feng)圈(quan)與密(mi)(mi)封(feng)(feng)面接觸面積增大(da)(da),產生(sheng)(sheng)很大(da)(da)的(de)(de)(de)(de)摩擦阻力(li)(li)(li)(li),過(guo)(guo)大(da)(da)的(de)(de)(de)(de)摩擦力(li)(li)(li)(li)會(hui)造成密(mi)(mi)封(feng)(feng)圈(quan)的(de)(de)(de)(de)破損,在低(di)壓(ya)(ya)時造成啟動困(kun)難,或(huo)產生(sheng)(sheng)爬(pa)行現象,唇(chun)形(xing)(xing)密(mi)(mi)封(feng)(feng)圈(quan)可以通過(guo)(guo)唇(chun)部撐開,變(bian)形(xing)(xing)補償小的(de)(de)(de)(de)磨(mo)損量(liang),保證密(mi)(mi)封(feng)(feng)效果和密(mi)(mi)封(feng)(feng)壽命;而O形(xing)(xing)圈(quan)隨著摩擦余量(liang)的(de)(de)(de)(de)減少(shao),直接影(ying)響(xiang)其密(mi)(mi)封(feng)(feng)性。

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  2、液壓(ya)密封件之材(cai)料(liao)選(xuan)擇(ze)


  密(mi)(mi)(mi)封件(jian)形(xing)式(shi)和結構現在(zai)一(yi)般已(yi)經(jing)定(ding)型,各密(mi)(mi)(mi)封件(jian)質(zhi)量區別主(zhu)要(yao)在(zai)于(yu)制(zhi)作(zuo)(zuo)材(cai)(cai)(cai)料(liao)上。密(mi)(mi)(mi)封材(cai)(cai)(cai)料(liao)主(zhu)要(yao)使(shi)用(yong)(yong)橡膠和合成樹脂。由(you)于(yu)各種(zhong)材(cai)(cai)(cai)料(liao)性(xing)(xing)(xing)(xing)能(neng)(neng)特點不(bu)(bu)同(tong)(tong),性(xing)(xing)(xing)(xing)能(neng)(neng)特點不(bu)(bu)同(tong)(tong),用(yong)(yong)途也就(jiu)有(you)(you)(you)所不(bu)(bu)同(tong)(tong)。選用(yong)(yong)時需(xu)根據(ju)不(bu)(bu)同(tong)(tong)的(de)(de)(de)使(shi)用(yong)(yong)條件(jian)和不(bu)(bu)同(tong)(tong)的(de)(de)(de)使(shi)用(yong)(yong)條件(jian)作(zuo)(zuo)出合適(shi)的(de)(de)(de)選擇。另(ling)外,某一(yi)材(cai)(cai)(cai)質(zhi)的(de)(de)(de)密(mi)(mi)(mi)封對(dui)被密(mi)(mi)(mi)封的(de)(de)(de)某一(yi)工作(zuo)(zuo)介質(zhi)(如礦物油(you)等)表(biao)(biao)現較(jiao)好的(de)(de)(de)密(mi)(mi)(mi)封性(xing)(xing)(xing)(xing)能(neng)(neng),而對(dui)另(ling)一(yi)介質(zhi)表(biao)(biao)現極差,這就(jiu)是密(mi)(mi)(mi)封材(cai)(cai)(cai)料(liao)與液壓油(you)的(de)(de)(de)相容性(xing)(xing)(xing)(xing)。還有(you)(you)(you),各種(zhong)不(bu)(bu)同(tong)(tong)的(de)(de)(de)密(mi)(mi)(mi)封材(cai)(cai)(cai)料(liao)對(dui)你不(bu)(bu)同(tong)(tong)的(de)(de)(de)工作(zuo)(zuo)條件(jian)表(biao)(biao)現出不(bu)(bu)同(tong)(tong)的(de)(de)(de)性(xing)(xing)(xing)(xing)能(neng)(neng)。有(you)(you)(you)些(xie)(xie)(xie)耐(nai)熱(re),有(you)(you)(you)些(xie)(xie)(xie)不(bu)(bu)耐(nai)熱(re);有(you)(you)(you)些(xie)(xie)(xie)耐(nai)酸(suan),有(you)(you)(you)些(xie)(xie)(xie)耐(nai)堿,有(you)(you)(you)些(xie)(xie)(xie)耐(nai)水,有(you)(you)(you)些(xie)(xie)(xie)耐(nai)油(you);有(you)(you)(you)些(xie)(xie)(xie)抗(kang)熱(re),有(you)(you)(you)些(xie)(xie)(xie)耐(nai)低(di)溫(wen),有(you)(you)(you)些(xie)(xie)(xie)耐(nai)高溫(wen),等等。這些(xie)(xie)(xie)因素在(zai)考(kao)慮密(mi)(mi)(mi)封件(jian)材(cai)(cai)(cai)料(liao)的(de)(de)(de)時候需(xu)注意(yi)。