Transient lubrication analysis of UHMWPE bearings during start-up with vibration and shock

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (24) : 144-149.

XIE Yinong，WANG Youqiang，SONG Xiaoping，ZHAO Jingjing，ZHANG Ping

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Abstract

An elastohydrodynamic lubrication model of the ultra-high molecular weight polyethylene (UHMWPE) bearing during the start-up was established.The acceleration with vibration and shock coupled time-dependent effect was comprehensively considered.The lubrication condition of the UHMWPE bearing under different working conditions was numerically simulated for reference to ensure safe operation.The results show that the effect of impact on pressure is greater, and the vibration has a greater influence on film thickness.When the normal vibration of the shaft and the impact of the waves are in the same period and both changes are the same, there will be a synergetic effect of superposition, and vice versa.The effect of negative sinusoidal vibration on pressure and film thickness is even more pronounced.As the acceleration increases, the pressure decreases, the film thickness increases, and the effect of vibration on the pressure and film thickness becomes smaller.

Key words

ultra-hight molecular weight polyethylene(UHMWPE) bearing / start-up / shaft vibration / wave shock / coupled time-dependent effect / elastohydrodynamic lubrication

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XIE Yinong，WANG Youqiang，SONG Xiaoping，ZHAO Jingjing，ZHANG Ping. Transient lubrication analysis of UHMWPE bearings during start-up with vibration and shock[J]. Journal of Vibration and Shock, 2019, 38(24): 144-149

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