Influence of Currents from Electrostatic Charges on WEC Formation in Rolling Bearings
Influence of Currents from Electrostatic Charges on WEC Formation in Rolling Bearings
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DOI：
10.1080/10402004.2015.1118582
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发表时间：
2016-01-01
影响因子：
2.1
通讯作者：
Goss, Matthias
中科院分区：
文献类型：
--
作者：
Loos, Joerg;Bergmann, Iris;Goss, Matthias
白色腐蚀裂纹（WEC）早期轴承失效发生在滚动接触除了纯滚动载荷（p（Hz））之外还受到所谓的附加载荷（例如流过轴承的电流）时。对滚动轴承的试验表明，低直流电（如静电荷引起的直流电）可导致油润滑滚子轴承和润滑球轴承中的WEC失效。试验中WEC的形成取决于电流、电极性、负载类型（旋转或静止环负载）和轴承负载。WEC关键轴承环的黑色氧化导致寿命显著增加。基于这些发现，建立了直流电引发WEC失效的阴极WEC疲劳失效假设。
White etching crack (WEC) early bearing failures occur when the rolling contact is subjected to a so-called additional load such as an electrical current flowing through the bearing, in addition to the pure rolling load (p(Hz)). Tests on rolling bearings showed that a low electrical direct current flow, such as that resulting from electrostatic charges, can lead to WEC failures in oil-lubricated roller bearings and greased ball bearings.The WEC formation in the performed tests was dependent on the current, electrical polarity, load type (rotating or stationary ring load), and bearing load. A black oxidation of the WEC critical bearing ring led to a significant increase in lifetime. Based on the findings, the failure hypothesis cathodic WEC fatigue for electrical direct current-initiated WEC failures was established.