Material Property Study on Graphene Infused Porous Polyimide Bearing Cage
DENG Kaiwen1, NIU Rongjun1, SUN Xiaobo2, GUO Junli3, DENG Sier1,4,5,*
1 College of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471003,Henan, China 2 Luoyang Bearing Research Institute Co., Ltd., Luoyang 471039,Henan, China 3 Institute of Applied Physics, Jiangxi Academy of Sciences, Nanchang 330012, China 4 National United Engineering Laboratory for Advanced Bearing Tribology, Luoyang 471023,Henan, China 5 Collaborative Innovation Center of Major Machine Manufacturing in Liaoning, Dalian 116024, Liaoning, China
Abstract: Porous polyimide composite has become the first choice of the material of aerospace bearing cages due to its good self-lubricating property. However, its poor thermal conductivity and wear resistance can lead to the shortened bearing service life and seriously affect the reliability of the control system of the aerospace vehicle. By mechanically mixing the graphene-modified porous polyimide composite, this work studied the microstructure, tribological properties and thermal conductivity of the material. The results show that the modified porous polyimide composite has excellent tribological properties and thermal conductivity. When the content of graphene is 1.0wt%, the thermal conductivity and the wear rate of material is 0.41 W/(m·K) and 43.25×10-5 mm3/(N·m), respectively, increasing by 36.9% and 27.3% over those of the unmodified composite material. As such, the modified composite cage has potential applications for prolonging the service life of aerospace bearings.
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2022, Vol. 36 
