RELATION BETWEEN OIL-FILM-FORMATION AND VIBRATION-ACCELERATION.

To certify the effect of the dynamic load on the oil-film-formation under partial elastohydrodynamic condition in spur gears, the cross-correlation function R//x//y(+ZZ96) was measured between the insulating voltage of oil-film and the vibration-acceleration in circumferential direction of the gear. The measured cross-correlation functions show clearly that the breakdown of oil-film is likely to occur at the maximum of vibration-acceleration. Under a light tangential load, the coefficients of the correlation R//x//y(0) were minus and their absolute values were large corresponding to large fluctuations of dynamic load, compared with the case of a heavy tangential load. In the case of a pair of hobbed gears, R// x//y(0) had a higher absolute value than in the case of ground gears.