A Dynamic Theory of Piston-Ring Lubrication : (4th Report, Load)

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  • ピストンリングの動的潤滑論 : (第4報, 荷 重)
  • ピストンリング ノ ドウテキ ジュンカツロン 4

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Abstract

In the previous reports of this series, it was assumed that the piston-ring was pushed out by the force of back pressure, and the experiments were carried out by the rubber tire method. In the actual condition, however, the pressures of gas act on the surfaces of the back and side of the ring and between the ring and the cylinder at the same time. In this report we have obtained the ratio of the pressure in the rubber tire to the pressure difference between the upper and lower sides of ring in order to equalize the lubricating properties in both cases, through the theoretical and experimental studies. This ratio is influenced by the shape and thickness of the oil-film and also by the moving direction of the piston-ring and etc., however, the approximate value is 0.5 for all conditions.

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