Research on the Tribological Properties of WC-Co Coatings for Aircraft Engine Variable Stator Vane
The variable stator vanes(VSV)regulating the structure of an aircraft engine is an important component that affects the normal operation of the engine and flight safety.The wear of the shaft-sleeve friction pair during VSV angle ad-justment is a key factor affecting the angle adjustment accuracy.In order to improve the anti-wear performance of the shaft-sleeve friction pair in the VSV system,a WC-Co anti-wear coating based on atmospheric plasma spraying was prepared on the shaft surface.Self-developed friction and wear test machine was used to simulate the wear performance of the shaft-sleeve under working conditions.The results show that under simulated working conditions,the friction torque of the shaft-sleeve friction pair is most closely related to the load,and the friction torque increases with increasing load.The surface composition analysis and microscopic morphological observation of the worn surface can be concluded that the friction pair undergoes adhesive wear phenomenon at elevated temperature,which leads to increased wear and particle fracture.Under the same temperature conditions,the increase in load leads to an increase in contact stress and the contact surface is worn.The wear coefficient tends to decrease and then increase with the increase in temperature.The research results provide a reference basis for the design of shaft-sleeve in the VSV system.
NETL
NSTL
万方数据
