TY - JOUR

T1 - Empirical formulae for the influence of real film thickness distribution on the capacitance of an EHL point contact and application to rolling bearings

AU - Schneider, Volker

AU - Liu, Haichao

AU - Bader, Norbert

AU - Furtmann, Alexander

AU - Poll, Gerhard

N1 - Funding Information: This work was executed at the Leibniz University Hannover, Germany. The authors would like to thank the “Otto von Guericke”-Research Association (AiF) for their financial support of the project (Grant No. 20496 N ). The authors also would like to thank the Flender GmbH for permission to publish this paper.

PY - 2021/2

Y1 - 2021/2

N2 - Electrical bearing capacitance plays an important role in the prediction of harmful bearing currents, which could lead to premature failure of the bearing and the entire drive system. The effect of rolling speed, force, and material parameters on the electrical capacitance of an elliptical contact in elastohydrodynamic lubrication has been studied numerically. An empirical equation that describes the relationship between the areas of central film thickness and minimum film thickness of the HERTZ'ian contact area has been derived. Additional, another formula to calculate the total capacitance of a rolling bearing, based only on the HERTZ'ian contact capacitance with the central film thickness as single parameter, has been developed. Finally, a comparison was made between the calculated capacities and measured values.

AB - Electrical bearing capacitance plays an important role in the prediction of harmful bearing currents, which could lead to premature failure of the bearing and the entire drive system. The effect of rolling speed, force, and material parameters on the electrical capacitance of an elliptical contact in elastohydrodynamic lubrication has been studied numerically. An empirical equation that describes the relationship between the areas of central film thickness and minimum film thickness of the HERTZ'ian contact area has been derived. Additional, another formula to calculate the total capacitance of a rolling bearing, based only on the HERTZ'ian contact capacitance with the central film thickness as single parameter, has been developed. Finally, a comparison was made between the calculated capacities and measured values.

KW - Bearing current

KW - Capacitance

KW - EHL

KW - Rolling bearing

UR - http://www.scopus.com/inward/record.url?scp=85093671265&partnerID=8YFLogxK

U2 - 10.15488/13258

DO - 10.15488/13258

M3 - Article

AN - SCOPUS:85093671265

VL - 154

JO - Tribology International

JF - Tribology International

SN - 0301-679X

M1 - 106714

ER -