Tribological behavior and thermoelastic instability demonstrated in ball-bearing -like specimens operating in dry contacts and with grease lubrication

Han, Chang Fu; Chu, Hung‐Kuo; Kuo, Po Chun; Liao, Neng Tung; Hwang, Yih-Chyun; Chiu, Yueh Lin; Lin, Jen Fin

doi:10.1016/j.triboint.2016.11.008

Cited by 4 publications

(1 citation statement)

References 18 publications

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“…Currently, the majority of research studies in the area of local hot spots are mainly focused on rotating parts such as brakes, clutches, and bearings. [22][23][24] However, only a few investigations have been performed so far to study the sealing aspect. It is worth noting that the sealing ring in the transmission can be made of different materials such as composite, metal, and powder metallurgical materials.…”

Section: Introductionmentioning

confidence: 99%

Investigation of local hot spots in sealing rings with different sealing materials

Gong

Xu³

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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The local high temperature in the sealing pair is prone to cause local wear, which easily leads to seal failure. In this paper, a numerical method based on the finite element method is proposed to investigate the local high-temperature hot spot in a sealing ring with different sealing materials. The distribution of hot spots on the sealing surface is visualized by numerical computations. The critical speeds of the hot spot for the metal, composite, and powder metallurgical sealing materials are obtained under different friction coefficients. Based on the obtained results, the quantitative correlation between the critical speed of the hot spot and elastic modulus, thermal conductivity, specific heat capacity, thermal expansion coefficient, and seal sizes is determined. Then, a test method is designed to evaluate the thermal instability of the sealing ring. Scanning electron microscopy is utilized to examine the surface morphology of the sealing rings after the hot spots appear. The results of the present study demonstrate that the proposed method is consistent with the experiment. It indicates the effectiveness of the simulation method for investigating local hot spots in the sealing ring.

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Section: Introductionmentioning

confidence: 99%