Effect of relative velocity between rough surfaces: hydrodynamic lubrication of rotary lip seal

• Autorzy: Lahjouji I. , El Gadari M. , El Fahime B. , Radouani M.

Identyfikatory

DOI

10.1515/ijame-2017-0019

• Języki publikacji: EN

Abstrakty

EN

Since the sixties, most of numerical studies that model the rotary lip seal lubrication have been restricted by assuming that one of the two opposing surfaces is smooth: either the lip or the shaft. This hypothesis, although it is verified only for a shaft roughness ten times smaller than that of the seal, is the best solution to avoid the transient term “∂h/∂t” in the deterministic approach. Thus, the subject of the present study is twofold. The first part validates the current hydrodynamic model with the international literature by assuming the asperities on the lip and shaft as a two-dimensional cosine function. In the second part the Reynolds equation for rough surfaces with relative motion is solved. The numerical results show that the relative motion between rough surfaces impacts significantly the load support and the leakage rate, but affects slightly the friction torque.

Słowa kluczowe

EN

hydrodynamic lubrication; roughness; relative velocity; Reynolds equation; finite differences

PL

smarowanie; chropowatość; prędkość względna; równanie Reynoldsa

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2017
• Tom: Vol. 22, no. 2
• Strony: 321--332
• Opis fizyczny: Bibliogr. 8 poz., wykr.

Twórcy

autor

Lahjouji I.

• Moulay Ismail University High School of Engineering ENSAM Meknes Research Laboratory in Mechanical, Mechatronic & Control – L2MC, MAROCCO

autor

El Gadari M.

• Moulay Ismail University High School of Engineering ENSAM Meknes Research Laboratory in Mechanical, Mechatronic & Control – L2MC, MAROCCO

autor

El Fahime B.

• Moulay Ismail University High School of Engineering ENSAM Meknes Research Laboratory in Mechanical, Mechatronic & Control – L2MC, MAROCCO

autor

Radouani M.

• Moulay Ismail University High School of Engineering ENSAM Meknes Research Laboratory in Mechanical, Mechatronic & Control – L2MC, MAROCCO

Bibliografia

• [1] Chen H., Wu Q., Xu C. and Zuo M. (2014): Research on cavitation regions of upstream pumping mechanical seal based on dynamic mesh technique. – Advances in Mechanical Engineering, vol.2014, Article ID 821058.
• [2] El Gadari M. (2013): Étude expérimentale et numérique du comportement des joints à lèvre. – Sustained at Hassan II University, Morocco.
• [3] Shen D. (2005): Deterministic modeling of a rotary lip seal with microasperities on the shaft surface. – Presented At the Academic University: Georgia Institute of Technology.
• [4] Maoui A., Hajjam M. and Bonneau D. (2008): Effect of 3D lip deformations on elastohydrodynamic lip seals behavior. – Science Direct, Tribology International, vpol.41, pp.901-907.
• [5] El Gadari M., Fatu A. and Hajjam M. (2015): Shaft roughness effect on elasto-hydrodynamic lubrication of rotary lip seals: Experimentation and numerical simulation. – Science Direct, Tribology International, vol.88, pp.218–227.
• [6] Kouatchou J. (): Finite Differences and Collocation Methods for the solution of two dimensional. – NASA Goddard Space Flight Center, Code 931, Greenbelt, MD 20771.
• [7] El Gadari M., Fatu A. and Hajjam M. (2016): Effect of grooved shaft on the rotary lip seal performance in transient condition: Elasto-hydrodynamic simulations. – Science Direct, Tribology International, vol.93, pp.411–418.
• [8] Gherca A. (2013): Modélisation de la lubrification des surfaces texturées : Application à la butée en régime hydrodynamique. – Sustained at POITIERS University.