机械密封端面摩擦特性参数及其测试技术

机械密封端面摩擦特性是决定机械密封工作寿命和密封性能好坏的关键因素,机械密封端面摩擦特性参数的测试是机械密封试验研究和产品质量评价中的关键技术。分析了表征机械密封端面摩擦特性的常用性能参数,介绍了端面摩擦扭矩、端面磨损量、端面温度、端面流体膜厚及端面流体膜压的测试技术,探讨了常用测试方法的优缺点及难点。指出了消除测试过程中外部较大的干扰信号是提高测试精度和可靠性的关键,而基于传感技术的计算机数据采集与处理是机械密封端面摩擦特性参数测试技术的发展趋势。

Face Friction Property Parameter and Test Technique of Mechanical Seals

The face friction property of mechanical seal is the key factor that can decide seal operating life and its capability.And mechanical seal friction property parameter is the key technology for seal testing study and its quality evaluation.The performance parameters of mechanical seal that are often used in operation were analyzed,face friction torque,wear quantum,face temperature,fluid film thickness and test technique of fluid film pressure distribution were introduced.The advantage,shortcoming and difficulty of testing method were probed,and it was pointed out that interferential signal elimination in the course of testing is the key point of test precision improvement and its reliability,computer data collection and transaction on the basis of transduction technique is the development direction for mechanical seal face friction property parameter test technique.