论文部分内容阅读
一、概述自润滑组合式密封是一种新型结构的气动密封,它是在“O”形橡胶密封圈的基础上演化出来的。众所周知,“O”形圈的密封具有结构简单、密封可靠、安装空间小及在较大的流体压力作用下具有明显的自密封能力等优点,因而得到广泛应用。但是起动摩擦阻力大,是“O”形圈动密封的最大缺点。在“O”形圈正确安装的情况下,起动摩擦阻力约为运动摩擦阻力的3～4倍。特别是设备仃机时间较长时,在接触处压力的作用下,润滑油被挤出而可能出现轻度的物理和化学粘着,使起动摩擦阻力
First, an overview Self-lubricating modular seal is a new type of pneumatic seal, which is based on the “O” -shaped rubber seal evolved. As we all know, “O” ring seal has the advantages of simple structure, reliable sealing, small installation space and large self-sealing ability with large fluid pressure and other advantages, which are widely used. However, starting frictional resistance, is the “O” ring seal the biggest drawback. In the “O” ring is installed correctly, the starting frictional resistance is about 3 ~ 4 times the friction resistance. In particular, the equipment Ding machines longer time, under the action of the pressure at the contact, the lubricant is squeezed out and may be mild physical and chemical adhesion, the starting frictional resistance