极端工况下机械密封的磨损性能

The wear performance of mechanical seals under extreme conditions

针对极端工况下机械密封的磨损性能进,对平衡式机械密封的设计原理和主要参数进行了阐述。同时,研究了动环材料9Cr18的耐高温性能和静环材料石墨随温度变化的磨损性能。研究结果表明:动环9Cr18和试验盘的摩擦系数随荷载的变化幅度较大,温度越大,摩擦系数变化幅度越明显;随着温度的逐渐增加,静环石墨材质的磨损量也逐渐增加。当温度增加到200℃时,静环石墨材质的磨损量达到0.8 g,是温度为50℃的4倍。基于超声波原理构建了润滑膜分布测量系统,分别对不同厚度(5、10和20μm)的润滑膜进行检测,结果表明单点误差仅为0.2~1.1μm,测量精度较高。

Aiming at the wear performance of mechanical seals under extreme conditions, described the design principles and main parameters of balanced mechanical seals. At the same time, studied the high temperature resistance of the moving ring material 9 Cr18 and the wear performance of the stationary ring material graphite with temperature changes. The research results showed that the friction coefficient of the moving ring 9 Cr18 and the test disc varies greatly with the load. The greater the temperature, the more obvious the friction coefficient changes, with the gradual increase of temperature, the wear of the graphite material of the stationary ring also gradually increases. When the temperature increased to 200 ℃, the wear amount of the graphite material of the stationary ring reached 0.8 g, which was 4 times the temperature of 50 ℃. A lubrication film distribution measurement system was constructed based on the ultrasonic principle, and the lubrication films of different thicknesses(5, 10 and 20 μm) were tested. The results showed that the single point error was only 0.2~1.1 μm, and the measurement accuracy was high.