论文部分内容阅读
工程机械底盘中低压往复运动的零部件,常采用由活塞、活塞座、唇形密封环组成的封闭腔体结构,如图1所示。在正常情况下,压力油进入唇形密封环内腔。在油压的作用下,密封环外唇贴紧活塞座,内唇贴紧活塞,这样活塞、唇形密封环和活塞座三者便可形成密闭腔体,起到密封作用,如图2所示。这种结构的密封环在工作温度较低时,受材
Construction machinery chassis reciprocating low pressure parts, often used by the piston, piston seat, lip seal ring composed of closed cavity structure, shown in Figure 1. Under normal circumstances, the pressure oil into the lip seal ring cavity. Under the action of the oil pressure, the outer lip of the seal ring is tightly attached to the piston seat, the inner lip is close to the piston, so that the piston, the lip seal ring and the piston seat can form a closed cavity and play a sealing role as shown in Figure 2 Show. This structure of the seal ring at lower operating temperatures, the acceptance