Analysis of transient elastohydrodynamic lubrication of point contact subjected to sinusoidal dynamic loads

International Conference on Design, Energy, Materials and Manufacture

能源学;材料科学

Cupu, D.R.P.^1^2 ; Stratmann, A.^2 ; Jacobs, G.^2

Department of Mechanical Engineering, University of Riau, Pekanbaru, Riau

28293, Indonesia^1

Institut für Maschinenelemente und Systementwicklung, RWTH Aachen University, Aachen

52062, Germany^2

关键词: Contact radius;    Contacting surfaces;    Machine element;    Pressure profiles;    Sinusoidal dynamics;    Surface velocity;    Transient elastohydrodynamic lubrication;    Vibration effect;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/539/1/012030/pdf
DOI  :  10.1088/1757-899X/539/1/012030

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Vibration is inevitable from all machine elements operations since the load, surface velocities or contact radii change in time. In the case of a ball bearing application, the load changes as the ball elements rotate around the track. This change will be more rapidly when the external load changes. The vibrations induce a sinusoidal dynamic load working on the contact. On the other hand, the imperfect waviness on the contacting surfaces causes the vibration effects on the film thickness to become more pronounced. This paper numerically investigates the influence of the sinusoidal varying loads due to vibrations on the film thickness and pressure profile of the isothermal, elastohydrodynamically lubricated point contact with a wavy surface. For that purpose, a single contact between ball element and inner raceway is modeled as a contact between a spherical ball and a flat plate. The results reveal that the external sinusoidal dynamic load induces the modulations on the film thickness and pressure profile. The waviness on one contacting surface causes the changes in the EHL behaviors to become more pronounced.