Research on Oil Cavity Lubrication Characteristics of Sliding Bearings for Wind Turbines With Strong Sudden Change and Heavy Load

ABSTRACT To analyze the oil cavity lubrication characteristics of wind turbines sliding bearings with discontinuous flow in mixed lubrication wear caused by strong sudden changes and heavy loads, this paper aims to improve a method to analyze the pressure and temperature of different oil cavity shapes with different condition to enhance the lubrication reliability. This proposed method combining CFD simulation based on the Finite Volume Method with RNG k – ε model is demonstrated to analyze effectively the oil cavity lubrication characteristics with mixed lubrication wear. The different oil cavity shapes—circular cavity, sector cavity, and cross‐shaped cavity, and different conditions including eccentricity, input pressure, temperature‐viscosity, and surface roughness were analyzed to explore the effects on the maximum pressure, bearing capacity, and temperature. The study accurately evaluates the load‐bearing support performance, temperature rise characteristics with different cavity shapes and different conditions. The results provide valuable references for optimizing lubrication reliability for wind power sliding bearing.