Experimental Study on the Lubricated Oil Film Pressure of the Connecting-Rod Big End Bearing in the Experimental Device
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Abstract
This paper presents the experimental study of the lubricating oil film pressure of the connecting-rod big end bearing in the special device for the lubricating condition of the connecting-rod big end bearing. A connecting-rod model of photoelastic material is subjected to simulated load as in an engine. The oil film pressure is measured at different positions in the circumferential direction and the mid-section in length by a pressure sensor located on the shaft. The measured results show that the oil film pressure corresponds to the load acting on the connecting-rod. At the position 0° of the bearing, the oil film pressure reaches a maximum value around the 360° of crank angle, the zone of the explosion, and the oil pressure is at minimum at 720° (0°) angle of the crankshaft, corresponding to the minimum load zone to the connecting-rod. In the opposite position, at the 180° of the housing bearing, the oil film pressure is at minimum when an explosion occurs and is at maximum in the neighborhoods of 0° of the crank angle. At the other position of the connecting-rod, the oil film pressure is also corresponding to the load acting on the connecting-rod. The maximum value of oil film pressure decreases when the rotational speed of the crankshaft increases, the minimum pressure of the oil film slightly varies.
Keywords
oil film pressure, connecting-rod, lubrication
Article Details
References
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[2] Rosenberg R.C., 1973, A Method for Determining the Influence of Multigrade Oils on Journal Bearing Performance, SAE TRANS. Paper 730483, Vol. 82.
[3] Goodwin G., Holmes R., 1975, Determination of the Oil Film Thickness in a Crankshaft Main Bearing, The Journal of Automotive Engineering, Instn, Mech, Engrs., 1975.
[4] Bates T.W., Evans P.G., 1985, Effect of Oil Rheology on Journal Bearing Performance: Part 1 Instrumentation of the Big-End Bearing of a Fired Engine, Proc. of the JSLE International Tribology Conference, 8-10 July, Tokyo, Japan, 1985.
[5] Bates T.W., Benwell S., Evans P.G., 1987, Effect of Oil Rheology on Journal Bearing Performance: Part 2 Oil Film Thickness in the Big-End Bearing of an Operating Engine, Proc. 4th SAE Int. Pacific Conference on Automotive Engineering, Melbourne, Australia, Paper No. 8712728.
[6] Bates T.W., Benwell S., 1988, Effect of Oil Rheology on Journal Bearing Performance: Part 2- Newtonian Oils in the Connecting-Rod Bearing of an Operating Engine, SAE Paper No. 880679.
[7] Pierre-Eugène J., Contribution à l’étude de la Déformation Élastique d’un Coussin de Tête de Bielle en Fonctionnement Hydrodynamique Permanent, Thèse de Doctorat de l’Université de Poitiers.
[8] Optasanu V., 2002, Modélisation Expérimentale et Numérique de la Lubrification des Paliers Compliants sous Charge Dynamique, Thèse de Doctorat de l’Université de Poitiers.
[9] Hoang L.V., 2002, Modélisation Expérimentale de la Lubrification Thermo-Élastohydrodynamique des Paliers de Tête de Bielle. Comparaison entre les Résultats Théoriques et Expérimentaux, Thèse de Doctorat de l’Université de Poitiers.
[10] Nguyễn Đăng Tân, 2018, Nghiên cứu mô phỏng số bôi trơn thủy động ở đầu to thanh truyền của động cơ đốt trong, Luận án tiến sĩ, Trường Đại học Bách Khoa Hà Nội.
[11] Trần Thị Thanh Hải, 2018, Giải pháp tạo tải mô phỏng tác dụng lên thanh truyền trong thiết bị thực nghiệm bôi trơn ở đầu to thanh truyền, Tạp chí Khoa học và Công nghệ các trường Đại học, số 129, năm 2018.