Surface durability of steel rollers lubricated by fresh and used engine oils in comparison with gear oil

• Autorzy: Ishibashi A. , Sonoda K. , Sunagawa Y. , Shoji R.
• Konferencja: Third International Tribology Conference ITC 2004
• Języki publikacji: EN

Abstrakty

EN

The lubricating oil used for the gasoline engine of passenger cars has been exchanged for a fresh oil after running a distance in the range of 3.000 to 10.000km, in Japan, in most cases. In the present investigation, used engine-oils were obtained by two different methods; (1) the oils were gathered at a car service centre, or (2) produced using test cars and fresh engine oils. The fresh and used engine-oils were chemically analysed and the amounts of nine elements (S, Cl, P, Zn, Pb, Mo, Fe, Al, Ca) in the oils were compared with those of a gear lubricating oil. Using a four ball tester, scoring load for the test oils were measured and then surface durability tests were conducted using a two roller testing machine. Many pits occurred at a Hertzian contact pressure of 1.000MPa on the steel rollers with a hardness of 180HB when a fresh engine-oil or the gear oil was used for lubricating the rollers. However, not a single pit occurred at the same contact pressure up to 10 million rotations when the used engine-oil was used. The reason for the higher surface durability was explained using the results of the chemical analyses and scoring tests.

Słowa kluczowe

EN

engine oil; used engine oil; gear oil; pitting; EP additives; surface failure

PL

wytrzymałość materiałów; olej silnikowy; uszkodzenie powierzchni; olej przekładniowy

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2004
• Tom: Vol. 9, no spec.
• Strony: 79--85
• Opis fizyczny: Bibliogr. 8 poz., rys., tab., wykr.

Twórcy

autor

Ishibashi A.

• Department of Mechanical Engineering, Sojo University, Kumamoto, JAPAN

autor

Sonoda K.

• Department of Mechanical Engineering, Sojo University, Kumamoto, JAPAN

autor

Sunagawa Y.

• Department of Mechanical Engineering, Sojo University, Kumamoto, JAPAN

autor

Shoji R.

• Department of Mechanical Engineering, Sojo University, Kumamoto, JAPAN

Bibliografia

• [1] Dowson D. and Higginson G.R. (1977): Elasto-Hydrodynamic Lubrication. - Oxford: Pergamon Press.
• [2] Ishibashi A. and Yokote T. (1970): Effect of surface roughness and running-in upon pitting fatigue in rolling contact surface. - Bulletin of JSME, vol.13, No.59, pp.707-718.
• [3] Ishibashi A. and Matsumoto S. (1972): Effects of surface roughness and form factor on rolling contact fatigue. - Bulletin of JSME, vol.15, No.89, pp.1434-1447.
• [4] Ishibashi A. and Yokote T. (1974): Limits of contact stress allowable on rollers made of carbon and alloy steel and changes in contact surface. - Bulletin of JSME, vol. 17, No.l 12, pp. 1224-1232.
• [5] Ishibashi A. et al. (1978): Appreciable increase in pitting limit of contact surface under rolling and sliding conditions. - Trans. ASME, Jour. Mech. Des., vol. 100, No.3, pp.440-450.
• [6] Ishibashi A. and Hoyashita S. (1987): Effect of difference in roller hardness on rolling contact fatigue. - JSME Int. J., vol.30, No.269, pp.1826-1832.
• [7] Ishibashi A. et al. (1989): Testing machine used to analyze speed ratio and efficiency of planetary traction drive and thrir application. - Trans, of JSME., vol.55, No.519, pp.2849-2855.
• [8] Ishibashi A. and Sonoda K. (1992): Mirrorlike finishing of precision rollers and changes on the roller surface caused by loaded running. - JSME Int. J., Series 3, vol.35, No.2, pp.286-293.