Study on the influence of electric erosion on the early lubrication state of rolling bearings 核心 · 已核验

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This study investigates the influence of electrical erosion on the early lubrication state of rolling bearings. Using a bearing test rig, the friction torque and outer ring temperature of 6204 deep groove ball bearings were measured under an electric field environment. Post-test analysis of the bearing surface was conducted using Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS). Additionally, the lubricant film thickness and friction coefficient under the electric field environment were measured using an optical elastohydrodynamic lubrication (EHL) film test rig. The results indicate that in the initial stages of electrical erosion, a direct current (DC) electric field leads to a reduction in film thickness and COF. Discharges within the lubricant film create electrical erosion pits on the bearing surface, inducing material transfer and oxide formation in the contact pairs. The higher speed, the greater the extent of damage to the bearing surface caused by discharges. The primary reasons for the rise in bearing temperature are the localized high temperatures caused by discharges and Joule heating generated when current passes through the contact area. The localized thermal effect caused by Joule heating leads to the formation of microbubbles, which is the main reason for the reduction in oil film thickness. When the voltage in the contact area is sufficiently high, destructive discharges can occur near the contact area, and the occurrence of such discharge phenomena is related to the presence of microbubbles.

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落地页

https://doi.org/10.57760/sciencedb.39277

许可证

CC-BY-NC-ND-4.0 (置信:verified_official)

国内可访问性

国内直连:直连超时(慢或不稳定,非封锁证据) (2026-07-11 检测) 非直连:可达 (2026-07-11 检测)
「直连超时」表示检测窗口内未完成,系慢或不稳定证据,不构成封锁证据。

设备类型

rolling_bearing

运行工况