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星(xing)型(xing)(xing)(xing)密封(feng)(feng)(feng)圈(quan)是(shi)(shi)液(ye)壓缸中最常用的(de)(de)密封(feng)(feng)(feng)件,它是(shi)(shi)一種典型(xing)(xing)(xing)的(de)(de)唇口密封(feng)(feng)(feng)件,無(wu)論用于活塞或是(shi)(shi)活塞桿都能獲得良(liang)(liang)好的(de)(de)密封(feng)(feng)(feng)效果,U型(xing)(xing)(xing)圈(quan)在(zai)低壓情況下,只靠唇部的(de)(de)過(guo)盈(ying)變(bian)形(xing)產生(sheng)密封(feng)(feng)(feng)。因(yin)接(jie)觸(chu)面(mian)積小,磨擦力(li)相對較低,隨著(zhu)壓力(li)升高(gao),唇口彈性(xing)變(bian)形(xing)量增加,拉伸,壓縮及彎曲應(ying)力(li)增加,U型(xing)(xing)(xing)圈(quan)徑向壓緊力(li)自動變(bian)大,與密封(feng)(feng)(feng)面(mian)接(jie)觸(chu)的(de)(de)長(chang)度不斷增加,直(zhi)到U型(xing)(xing)(xing)圈(quan)整(zheng)個(ge)軸(zhou)向長(chang)度與密封(feng)(feng)(feng)面(mian)接(jie)觸(chu),從而保證高(gao)壓狀(zhuang)態下具有良(liang)(liang)好的(de)(de)密封(feng)(feng)(feng)性(xing)。 星(xing)型(xing)(xing)(xing)密封(feng)(feng)(feng)圈(quan)是(shi)(shi)自身具有彈性(xing)
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