Influence of Currents from Electrostatic Charges on WEC Formation in Rolling Bearings
| Autor: | Joerg Loos, Iris Bergmann, Matthias Goss |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Electrical polarity
Materials science Bearing (mechanical) business.industry Mechanical Engineering Direct current Metallurgy 02 engineering and technology Surfaces and Interfaces Structural engineering 021001 nanoscience & nanotechnology Surfaces Coatings and Films Cathodic protection law.invention 020303 mechanical engineering & transports Electrical current 0203 mechanical engineering Mechanics of Materials law Ball (bearing) 0210 nano-technology business |
| Zdroj: | Tribology Transactions. 59:865-875 |
| ISSN: | 1547-397X 1040-2004 |
| Popis: | 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 (pHz). 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|