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眉縣常見液壓密封件的種類與選用

發布時間:2021-12-08 11:35:53 人氣(qi):139464 來源(yuan):

  常見液(ye)壓(ya)密封(feng)(feng)(feng)件(jian)的種(zhong)類與選用:液(ye)壓(ya)缸常用的液(ye)壓(ya)密封(feng)(feng)(feng)件(jian)主要有(you)O型(xing)密封(feng)(feng)(feng)圈,唇形密封(feng)(feng)(feng)件(jian)和組合密封(feng)(feng)(feng)件(jian)。


  一、O型密(mi)封圈(quan)(O型圈(quan))


  O型密(mi)封圈截面(mian)為(wei)O型,形狀簡單,材質為(wei)橡膠,耐(nai)磨性能(neng)不如聚氨(an)酯(zhi),所以在液壓系統(tong)中主要用于靜密(mi)封。


  二、唇形密封件


  U型(xing)密封(feng)圈(quan):U型(xing)密封(feng)圈(quan)的密封(feng)性能較好(hao),但單獨(du)使用(yong)(yong)是易翻滾,U型(xing)密封(feng)圈(quan)摩擦阻力較大并隨工作壓(ya)力的升高而增大。因此U型(xing)密封(feng)圈(quan)僅(jin)適宜(yi)于(yu)工作壓(ya)力較低或(huo)運動速度(du)較低的液(ye)壓(ya)缸采用(yong)(yong)。


  V型(xing)(xing)(xing)(xing)密(mi)封(feng)圈(quan)(quan)(quan):V型(xing)(xing)(xing)(xing)密(mi)封(feng)圈(quan)(quan)(quan)須配(pei)合(he)支承環(huan)和壓(ya)環(huan)使(shi)用,V型(xing)(xing)(xing)(xing)密(mi)封(feng)圈(quan)(quan)(quan)的(de)密(mi)封(feng)性能較(jiao)好,可根(gen)據(ju)工作(zuo)壓(ya)力(li)的(de)大(da)小來確定所(suo)用密(mi)封(feng)圈(quan)(quan)(quan)的(de)數(shu)目,通過(guo)壓(ya)環(huan)調整可以補償密(mi)封(feng)圈(quan)(quan)(quan)的(de)磨損,V型(xing)(xing)(xing)(xing)密(mi)封(feng)圈(quan)(quan)(quan)缺點是結(jie)構(gou)復雜,其摩擦阻力(li)較(jiao)大(da)。因此V型(xing)(xing)(xing)(xing)密(mi)封(feng)圈(quan)(quan)(quan)僅適宜于運動速度較(jiao)低而工作(zuo)壓(ya)力(li)較(jiao)高的(de)液壓(ya)缸采用。


  YX型密(mi)封(feng)(feng)圈(quan)(quan)(quan)(quan):YX型密(mi)封(feng)(feng)圈(quan)(quan)(quan)(quan)是截面(mian)寬度(du)與之(zhi)高(gao)度(du)比大于(yu)(yu)2,并且基于(yu)(yu)對使用(yong)(yong)穩定性的要求(qiu),YX型密(mi)封(feng)(feng)圈(quan)(quan)(quan)(quan)的工(gong)作唇短(duan)于(yu)(yu)非工(gong)作唇,由此分為孔用(yong)(yong)YX型密(mi)封(feng)(feng)圈(quan)(quan)(quan)(quan)和軸用(yong)(yong)YX型密(mi)封(feng)(feng)圈(quan)(quan)(quan)(quan),YX型密(mi)封(feng)(feng)圈(quan)(quan)(quan)(quan)使用(yong)(yong)時不會(hui)翻滾,所以YX型密(mi)封(feng)(feng)圈(quan)(quan)(quan)(quan)適宜于(yu)(yu)高(gao)壓、高(gao)速的液(ye)壓缸(gang)選用(yong)(yong)。

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  三、組合密封件


  蕾形(xing)圈(quan):蕾形(xing)圈(quan)是由合成橡膠質(zhi)的(de)(de)O型密(mi)封(feng)(feng)圈(quan)與夾布橡膠質(zhi)的(de)(de)Y型密(mi)封(feng)(feng)圈(quan)的(de)(de)疊加構成的(de)(de),依靠自(zi)身(shen)的(de)(de)變形(xing)對密(mi)封(feng)(feng)表面產生較高(gao)的(de)(de)初始(shi)接(jie)觸應力(li),阻止無(wu)壓(ya)(ya)力(li)液體的(de)(de)泄漏。液壓(ya)(ya)缸工作(zuo)時,壓(ya)(ya)力(li)油(you)使(shi)O型密(mi)封(feng)(feng)圈(quan)的(de)(de)彈性變形(xing),始(shi)終(zhong)擠壓(ya)(ya)和撐開Y型密(mi)封(feng)(feng)圈(quan)的(de)(de)密(mi)封(feng)(feng)唇部,使(shi)之緊貼(tie)密(mi)封(feng)(feng)表面,并與初始(shi)接(jie)觸應力(li)一起共同阻止壓(ya)(ya)力(li)油(you)的(de)(de)泄漏。


  格(ge)萊圈(quan)(quan):格(ge)萊圈(quan)(quan)是(shi)由O型(xing)橡膠密(mi)封(feng)(feng)圈(quan)(quan)與填(tian)充聚四氟乙烯質的方型(xing)密(mi)封(feng)(feng)圈(quan)(quan)的疊加(jia)使(shi)用構(gou)成(cheng)的,格(ge)來(lai)圈(quan)(quan)可分為孔用格(ge)來(lai)圈(quan)(quan)和(he)軸(zhou)用格(ge)來(lai)圈(quan)(quan),但它們(men)的密(mi)封(feng)(feng)機理是(shi)一樣的,依其(qi)本身的變形對密(mi)封(feng)(feng)表面(mian)產生較高的初(chu)始接(jie)(jie)觸應(ying)(ying)力,阻止無壓(ya)力液(ye)體的泄(xie)漏。液(ye)壓(ya)缸工(gong)作時(shi),壓(ya)力油(you)使(shi)O型(xing)密(mi)封(feng)(feng)圈(quan)(quan)的彈性變形擠壓(ya)方型(xing)密(mi)封(feng)(feng)圈(quan)(quan),使(shi)之緊貼密(mi)封(feng)(feng)表面(mian),并與初(chu)始接(jie)(jie)觸應(ying)(ying)力一起共(gong)同阻止壓(ya)力油(you)的泄(xie)漏。


  斯特(te)(te)(te)封(feng)(feng)(feng)(feng)(feng):斯特(te)(te)(te)封(feng)(feng)(feng)(feng)(feng)結構與(yu)(yu)格(ge)來圈(quan)(quan)相似,也(ye)是(shi)由O型橡(xiang)膠密(mi)封(feng)(feng)(feng)(feng)(feng)圈(quan)(quan)與(yu)(yu)填充聚四氟乙烯質的(de)特(te)(te)(te)殊形(xing)(xing)狀矩形(xing)(xing)或梯形(xing)(xing)的(de)密(mi)封(feng)(feng)(feng)(feng)(feng)圈(quan)(quan)所(suo)組成(cheng)的(de),斯特(te)(te)(te)封(feng)(feng)(feng)(feng)(feng)與(yu)(yu)格(ge)來圈(quan)(quan)一樣(yang)可(ke)分為(wei)孔用斯特(te)(te)(te)封(feng)(feng)(feng)(feng)(feng)和軸(zhou)用斯特(te)(te)(te)封(feng)(feng)(feng)(feng)(feng),斯特(te)(te)(te)封(feng)(feng)(feng)(feng)(feng)的(de)密(mi)封(feng)(feng)(feng)(feng)(feng)作用及(ji)密(mi)封(feng)(feng)(feng)(feng)(feng)機(ji)理與(yu)(yu)格(ge)來圈(quan)(quan)一樣(yang),但斯特(te)(te)(te)封(feng)(feng)(feng)(feng)(feng)只具有單向密(mi)封(feng)(feng)(feng)(feng)(feng)作用。斯特(te)(te)(te)封(feng)(feng)(feng)(feng)(feng)和格(ge)來圈(quan)(quan)共(gong)同特(te)(te)(te)點是(shi)填充聚四氟乙烯質材質,摩擦力小,無爬行(xing),壽命長(chang)。