论文部分内容阅读
旋转运动的密封装置一般有油封、机械密封和迷宫式密封等,其中以结构简单、使用方便、成本低廉的油封应用最广泛。经研究表明:油封的摩擦特性决定流体的润滑特性,即滑动时油封唇口的前缘和轴之间会形成粘性油膜,正是这种油膜保护了滑动面,避免了油封唇口和轴直接接触所引起的擦伤和磨损,保持油封工作稳定。因此,形成这种油膜是有必要的,但油膜层不宜过厚,以免发生油的泄漏。为了防止漏油必须保持此种油膜的连续性,如果油膜中断则工作稳定性就被破坏,为了保证油封的密封性能,有必要使防止油的泄漏和生成滑动面油膜
Rotary sealing devices generally have oil seals, mechanical seals and labyrinth seals, etc., of which the simple structure, easy to use, low cost oil seal the most widely used. The study shows that: the friction characteristics of the oil seal fluid lubrication characteristics, that is, when the lip seal sliding lips and viscous oil film between the front, it is this film to protect the sliding surface, to avoid the oil seal lip and shaft directly Contact caused by abrasions and wear, keep the oil seal stable. Therefore, the formation of such oil film is necessary, but the oil film should not be too thick, so as to avoid oil leakage. In order to prevent oil leakage must maintain the continuity of the film, if the oil film is interrupted the stability of the work was destroyed, in order to ensure the sealing performance of the oil seal, it is necessary to prevent the oil from leaking and generate sliding surface oil film