为解决高压高速与介质腐蚀的耦合作用下旋转密封可靠性与寿命不足的技术难题，针对旋转唇形密封开展试验研究，设计搭建带压高速旋转唇形密封试验台，开展唇形密封泄漏与摩擦转矩特性试验，开展唇形密封仿真计算，并创新性地提出一种带有低摩擦涂层的新型密封件，开展传统密封和喷涂新型密封在不同转速下密封温升和扭矩对比试验。实验结果显示：唇口喷涂聚四氟乙烯（PTFE）材料可有效降低密封温升，转速每增加1 000 r/min，在达到热平衡温度后，喷涂唇形密封较传统唇形密封温升降低2.4 ℃，带压工况下，涂层唇形密封较传统唇形密封温度低约3.48 ℃，高转速且恶润滑条件，喷涂唇形密封较传统唇形密封温度降低约4.61 ℃，但密封扭矩增加约0.03 N·m。从密封温升与密封摩擦转矩两方面评价密封性能，为解决高参数旋转密封技术难题提供理论支撑。

In order to solve the technical problem of insufficient reliability and life of rotary seal under the coupling effect of high pressure and high speed and medium corrosion, experimental research on rotary lip seal was carried out, a high-speed rotary lip seal test bed with pressure was designed and built, leakage and friction torque characteristic tests of lip seal were carried out, simulation calculation of lip seal was carried out, and a new type of seal with low friction coating was innovatively proposed. The temperature rise and torque comparison test of traditional seal and spraying new seal at different speeds were carried out. The experimental results show that the lip spraying tetrafluoroethylene (PTFE) material can effectively reduce the temperature rise of the seal. When the rotational speed increases by 1 000 r/min, after reaching the heat balance temperature, the temperature rise of the spray lip seal is 2.4 ℃ lower than that of the traditional lip seal. Under the pressure condition, the temperature of the coated lip seal is about 3.48 ℃ lower than that of the traditional lip seal. Under the condition of high speed and poor lubrication, the temperature of the spray lip seal is about 4.61 ℃ lower than that of the traditional lip seal, but the sealing torque increases by about 0.03 N·m. The sealing performance is evaluated from two aspects of sealing temperature rise and sealing friction torque, which provides theoretical support for solving the technical problems of high parameter rotary seal.