Influence of the Axial Movement of Misaligned Journal on Lubrication Performance of Journal Bearing with Rough Surface

doi:10.3901/JME.2019.21.088

Abstract

Abstract: At present, the axial movement of journal which moves along the axis direction of journal bearing under the combined action of various factors is ignored in the lubrication analysis of journal bearing, which has a big difference from the actual working condition of bearing in the shaft-bearing system. The shaft-bearing system is taken as the research object. With a comprehensive consideration of the axial movement of journal, the surface topography and the misaligned journal, a new lubrication model of journal bearing is established based on average Reynolds equation. The influence of the axial movement of journal on the lubrication characteristics of misaligned journal bearing with a rough surface is analyzed mainly. The results show that the axial movement of misaligned journal has a significant effect on lubrication characteristics of journal bearing. Comparing by, the influence of axial movement on lubrication characteristics of bearing is reduced when the rough surface of sliding surface is considered. The smaller the axial velocity of journal, the greater the influence of surface roughness on the maximum oil film pressure, load-carrying capacity, and overturning moment of journal bearing. The smaller the axial velocity, the more significant the influence of Peklenik parameter on lubrication characteristics. Therefore, it is necessary to consider the influence of the axial movement of journal in the lubrication analysis of misaligned journal bearings with a rough surface.

Key words: misaligned journal, axial movement, surface topography, journal bearing, lubrication

CLC Number:

TH133

LI Biao, SUN Jun, ZHU Shaoyu, FU Yangyang, MIAO Enming, REN Yanping, ZHU Guixiang. Influence of the Axial Movement of Misaligned Journal on Lubrication Performance of Journal Bearing with Rough Surface[J]. Journal of Mechanical Engineering, 2019, 55(21): 88-97.

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