Research on Friction Characteristics of Roller-bushing Based on Material Experiment

doi:10.3901/JME.260241

Abstract

Abstract: Axisymmetric vectoring exhaust nozzle for aero-engine is one of the key components for achieving thrust vectoring conversion capability due to its ability to achieve 360 ° vector deflection. At present, in nozzle design and dynamic research, most consider the joint friction coefficient to be constant. However, the friction coefficient often has a time-varying effect, which leads to problems such as joint wear or sticking in the actual working process of the mechanism due to dynamic changes in friction force and unreasonable design. Therefore, based on the measured data of material level friction experiments, a dynamic friction coefficient model considering time-varying effect is first proposed. Then, an Axisymmetric Vectoring Exhaust Nozzle dynamic model is established to obtain the load and motion boundary conditions of the key components of the roller-bushing. On this basis, the influence of time-varying effect on the friction characteristics of the roller-bushing. is analyzed. The results show that the time-varying effect of friction coefficient has a more significant impact on the friction force at the beginning of operation, and should be carefully considered in mechanism design.

Key words: axisymmetric vectoring exhaust nozzles, friction experiment, dynamic friction coefficient, friction characteristics

CLC Number:

YAO Sibo, LUO Zhong, ZHOU Shenghao, XU Chunyang, ZHANG Hongwei, ZHAO Jiang. Research on Friction Characteristics of Roller-bushing Based on Material Experiment[J]. Journal of Mechanical Engineering, 2026, 62(5): 244-252.

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http://www.cjmenet.com.cn/EN/Y2026/V62/I5/244

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