摘要:

The present work deals with the effects of instantaneous charge leakage on the rise of contact temperature between the journal and a hydrodynamic journal bearing lubricated with high resistivity oil under the influence of different levels of shaft voltages. An analysis is carried out for the rise of contact stresses by the instantaneous charge leakage, where stresses lead to the initiation of craters by the arcing effects, resulting in subsequent damage to the bearing liner. Charge leakage between high points of the journal and a bearing liner during momentary contact in the zone of load carrying oil film was used to establish heat generated and instantaneous temperature rise in each shaft rotation. Using this temperature rise, the contact stresses were determined and a reduction in bearing life compared to the bearing operating without the influence of shaft voltage was established. Subsequently, the safe limit of a shaft voltage has been assessed for the reliable operation of a bearing operating under the influence of shaft voltage.

ISSN:1040-2004    

DOI:10.1080/10402009108982080

出版商:Taylor & Francis Group    

年代:1991

数据来源: Taylor

摘要:

Dimensionless film-thickness equations are provided for four fluid-film lubrication regimes found for nonconformal surfaces. Side-leakage effects are present in the equations. These regimes are isoviscous-rigid; piezoviscous-rigid, isoviscous-elastic, or soft EHL; and piezoviscous-elastic, or hard EHL. The influence or lack of influence of elastic and viscous effects is a factor that distinguishes these regimes. The film-thickness equation for the respected regimes come from earlier theoretical studies. Results are presented as a map of the lubrication regimes, with film thickness contours on a log-log grid of the viscosity and elasticity parameters for four values of the ellipticity parameter.Presented as a Society of Tribologlsts and Lubrication Engineers paper at the ASME/STLE Tribology Conference In Toronto, Ontario, Canada, October 8–10, 1990

ISSN:1040-2004    

DOI:10.1080/10402009108982081

出版商:Taylor & Francis Group    

年代:1991

数据来源: Taylor