Oil-bleeding dynamic model to predict permeability characteristics of lubricating grease

Camousseigt, Léa; Galfré, Aurélie; Couenne, Françoise; Oumahi, Camella; Muller, Sandrine; Tayakout‐Fayolle, Mélaz

doi:10.1016/j.triboint.2023.108418

Cited by 6 publications

(1 citation statement)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Grease is mainly composed of base oil, thickener and additives. The thickener has a three-dimensional network structure, and the base oil is a semifluid material 9 , 10 . The degradation of the grease performance during service is one of the key factors contributing to bearing failure.…”

Section: Introductionmentioning

confidence: 99%

Study of the changes in the microstructures and properties of grease using ball milling to simulate a bearing shear zone on grease

Ren,

Cai,

Zhao

et al. 2024

Sci Rep

View full text Add to dashboard Cite

The effects of shear degradation on the microstructures and properties of grease were investigated using a planetary ball mill to simulate a bearing shear zone on grease. The microstructure, cone penetration, colloidal stability, rheological properties noise properties, water washout characteristics and low-temperature torque of lithium grease were characterized. The microstructure of the initial lithium grease is a three-dimensional network structure formed by the uniform fibers. The entanglement level is high. As the ball milling shear time increases, the network structure of lithium grease is destroyed and the fibers are sheared to become short. Eventually all of them become short fibers. The performance test of lithium grease reveal that the cone penetration increases, colloidal stability, structural strength, noise properties, water washout characteristics of lithium grease gradually decreased with the increase of ball milling shear time. Additionally, the low-temperature starting torque and running torque of the grease gradually decrease. This phenomenon occurs due to changes in the microstructure of lithium grease. The shear degradation of lithium grease was mainly divided into two stages: the rapid stage was the destruction of the thickener network structure and the fibers being shortened by shearing. The slow stage was the process in which short fibers were sheared into shorter fibers.

show abstract

Section: Introductionmentioning

confidence: 99%