超大型海上风电齿轮箱的高性能唇封数值仿真

Numerical Simulation of High-performance Lip Seal for Ultra Large Offshore Wind Power Equipment

以海上风电齿轮箱的高性能长寿命唇形密封界面为研究对象,结合其应用工况及自身结构,考虑密封系统由装配误差和零部件公差造成的静偏心现象,建立综合考虑密封系统实际服役状态下界面流体力学、宏观固体力学、表面微观接触力学等多物理场耦合的数值仿真分析模型,并用径向力测试仪验证了有限元仿真模型的合理性,以危险截面的泄漏率及摩擦力矩等为评定指标,研究了恶劣海况下风电“主传动链”静偏心对旋转油封性能的影响规律。结果表明,静偏心会改变唇口的接触状态,对密封性能造成较大影响,该研究对超大型海上风电装备的密封及防泄漏设计和应用有指导意义。

Taking the high performance and long lifespan lip sealing interface of offshore wind power gearbox as the research object,combined with its application conditions and its own structure,the static eccentricity caused by assembly errors and component tolerances of the sealing system is considered.A numerical simulation analysis model is established which comprehensively considers the coupling of multiple physical fields such as interface fluid mechanics,macroscopic solid mechanics and surface microscopic contact mechanics under the actual service condition of the sealing system.The rationality of the finite element simulation model is verified by using a radial force tester.The leakage rate of dangerous cross section and friction torque are taken as evaluation indexes.The influence of static eccentricity of the wind-electric "main drive chain" on the performance of rotary oil seal under bad sea conditions is studied.The results show that the static eccentricity can change the contact state of the lip,which has a great impact on the sealing performance.The study has a guiding significance for the sealing and antileakage design and application of ultra-large offshore wind power equipment.