Objective  The wind turbine generator (WTG) yaw braking system has application in low-pressure yaw and high-pressure heavy load, and the friction performance between friction pairs is influenced by various parameters between the components of the yaw braking system.

  Method  Based on the friction test bench of disc brakes, this paper simulated the operation of the brakes under different working conditions of the WTG, studied the friction characteristics of organic composite materials under different pressures, velocities and temperatures for dual components of same and different materials, and revealed the influencing factors of different parameters on friction coefficient from the perspective of tribology.

  Result  The results show that under the same surface parameters, different dual component materials have a significant impact on the friction coefficient; The friction coefficient decreases with the increase of braking pressure and relative velocity of the friction pair and the braking pressure has a greater impact factor on the friction coefficient; The friction coefficient is greatly affected by temperature, and the higher the temperature between the friction pairs, the smaller the friction coefficient.

  Conclusion  The research results have important theoretical significance and practical value for the parameter selection and braking control logic of the wind turbine generator yaw braking system.