Kalsi型密封结构及其密封接触压力研究

Kalsi型密封是一种新型动压密封,主要用于多磨砺、高压、高频冲击及振动等密封环境。在对标准Kalsi密封结构研究的基础上,运用大型有限元软件Solidworks及与之配套的COSMOSFloW orks对其进行有限元计算,获得了内接触面压力分布规律。结果表明:Kalsi密封结构的“唇部”构造,使密封具备密封压力高、磨损低、扭矩稳定和润滑好等特点;Kalsi密封内接触面从流体动力密封边界一端向外缘,轴向压力呈递增趋势,在“唇部”的波峰(谷)位置应力发生突变至最大值,说明“唇部”动压密封是Kalsi密封的主要表现形式;在相同工况下,Kalsi密封最大密封压力是普通O形密封压力的1.88倍,并具有较强的抗变形能力和优越的物理性能。

Study on Structure and Sealing Performance of Kalsi Seal

As a new hydrodynamic seal,Kalsi seal is mainly used in the conditions such as environmental abrasives,high differential pressure,and high levels of shock and vibration.On the basis of research on structure of standard Kalsi seal,the finite element calculation was carried out by the software Solidworks and its matched software COSMOSFloWorks.The distribution of pressure on inner contact interface was obtained.Results show that Kalsi seal has good characteristics such as high sealing pressure,low wear,steady torque and fine lubrication because of its lip structure;from its hydrodynamic boundary to outside of inner contact interface,pressure along axes shows a trend of increase by degrees and reaches to the maximum at wave crest or trough,which indicates that hydrodynamic seal of lips is the main sealing fashion;under the same condition,Kalsi seal's maximum sealing pressure is 1.88 times as much as O-type seal's,and it also has stronger distortion resist ability and more predominant physical capability.