为解决隧道掘进机主驱动高压密封技术难题，指导高压工况下密封系统参数设计，通过搭建5 m级主驱动密封试验台，采用静态试验与动态试验相结合的方法，验证密封试验台的可行性，并深入研究转速、承压状态与冷却水流量对唇形密封与聚氨酯密封2种高压密封系统运行温度的影响。结果表明： 1）静态试验下，高压密封系统逐级加压至2 MPa可保持稳定，验证了2种密封系统的高承压能力； 2）唇形密封与聚氨酯密封的动态试验显示，高转速会降低承压密封的稳定性，在高压下影响显著增强； 3）转速对密封系统温度有较大影响，与密封系统温升呈正相关，并且承压越高，密封系统温升越大； 4）2种密封系统在转速1.5 r/min附近可均衡系统稳定性与发热量要求，聚氨酯密封结构的冷却水流量控制在50 L/min较优。

To solve the technical problems of the main drive highpressure sealing of tunnel boring machines and provide guidance for the parameter design of the sealing system under highpressure conditions, a 5 m main drive sealing test platform is established. Then, the feasibility of the sealing test platform is validated using a combination of static and dynamic tests. Moreover, the influences of rotating speed, pressure, and cooling water flow on the temperature rise of two highpressure sealing systems of lipshape and polyurethane seals are investigated. The results indicate the following: (1) In the static test, the highpressure sealing system is pressurized sequentially to 2 MPa and then becomes stable, validating the highpressure bearing capability of the two sealing systems. (2) The dynamic experiment results of the lipshape and polyurethane sealing systems indicate that a high rotating speed will reduce the stability of seal pressure, and the influence is more significant under high pressure. (3) The rotating speed significantly influences seal temperature; moreover, there is a positive correlation with seal temperature rise. The higher the seal pressure, the greater the seal temperature rise. (4)  A rotating speed of 1.5 r/min can balance the requirement of stability and calorific values of the two sealing systems. The cooling water flow of the polyurethane seal system is better controlled at 50 L/min.