一概述油封的主要功用是防止机器内部的介质(如润滑油等)泄漏出来,防止外部灰尘、杂质以及水份等侵入内部.初期的油封、除皮革之外找不到稳定性更好的其他材料.皮革在耐热、耐介质、密封性能、使用寿命等方面存在很多缺陷,因而不能得到令人满意的密封效果.第二次世界大战后,尤其是近二十年来随着高分子材料的迅速发展出现了各种耐油、耐介质、耐热、耐磨等性能较好的合成橡胶,如丁腈胶、丙烯酸酯橡胶、氟橡胶、硅橡胶等.因此,油封的应用范围不断扩大,成为工业部门中一种不可缺少的组成部分,其重要性也逐渐为人们所认识. An overview The main function of the oil seal is to prevent the media inside the machine (such as lubricating oil, etc.) from leaking out, to prevent external dust, impurities and water intrusion, etc. The initial oil seal, can not find the stability better than leather Other Materials Leather has many defects in terms of heat resistance, media resistance, sealing performance, service life, etc., so that satisfactory sealing effect can not be obtained. After the Second World War, especially in the past two decades, The rapid development of a variety of oil, media, heat, wear and other performance better synthetic rubber, such as nitrile rubber, acrylic rubber, fluorine rubber, silicone rubber, etc. Therefore, the application of the oil seal expanding, becoming An indispensable part of the industrial sector, its importance is also gradually recognized.