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限制径向唇形密封使用范围的主要问题是橡胶密封件的耐磨性、由于在高压下密封唇径向力的增加所引起热负荷的增加、以及密封唇型面的稳定性.为了解决上述问题,应减小因密封压力所引起的唇部径向负荷的增加.密封唇接触区的温度分析表明,用密封压力和线速度的乘积来近似表示热负荷是合适的.径向负荷受密封唇几何形状的影响.测量值和计算值的比较完全一致.试验结果表明无压力场合下的标准设计的经向唇密封,其径向负荷和摩擦力矩比使用新概念的压力下使用的径向唇封要大得多.而且,密封唇压力的测量表明通用的径向唇封断面,在低压下就发生严重弯曲变形,而新设计的耐压径向唇断面,超过规定的压力范围仍保持稳定.
The main problems that limit the range of use of radial lip seals are the wear resistance of the rubber seal, the increase in thermal load due to the increase of the radial force of the sealing lip under high pressure, and the stability of the lip profile.In order to solve the above problems Problem, the increase of the radial load on the lip due to the sealing pressure should be reduced.The temperature analysis of the contact area of the sealing lip indicates that it is appropriate to approximate the thermal load by the product of the sealing pressure and the linear velocity. Lip geometry The results of the measurements and the calculated values are exactly the same.The experimental results show that the standard design of the meridian lip seal without pressure conditions has a higher radial and friction moment ratio than the radial The lip seal is much larger and the seal lip pressure measurement shows that the common radial lip seal section undergoes severe bending deformation at low pressure while the newly designed pressure resistant lip lip section remains above the specified pressure range stable.