Performance of Oil Rings (1st report)

Abstract

We have carried out a series of experiments to find out the amount of liquid supplied by an oil ring. Two kinds of rings with trapezoidal cross section, 1.025 cm and 0.696 cm in the equivalent diameter d, have been used for the experiments, where d=wetted perimeter/π. The results are : (1) When the submerged depth exceeds a certain critical value, the total oil-carrying capacity is independent of the submerged depth and the diameter of rings.(2) And also the total oil-carrying capacity depends on the kinematic viscosity of liquid, the equivalent diameter of rings, the velocity of rings and the acceleration of gravity. (eq. 12)(3) The critical submerged depth is determined by the kinematic viscosity, the inner width of rings and the acceleration of gravity.(eq. 4)(4) We have specified the ratio of the amount of adhering on the inner surface of the rings to the total oil-carrying capacity, (illustrated in Fig. 13)