Fundamental Research on Gear Lubrication : 4th Report, Analysis on the Formation of Oil Film and Its Dynamic Phenomena in Mating Gears

概要

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Oil film state in mating gears is considered to be quite a dynamic phenomenon, and it has become very important to analyze the dynamic performance of oil film between mating gearteeth. The hydrodynamic squeeze-effect and the tooth deflection were introduced into the lubrication theory, and the variation of oil film thickness between mating teeth was calculated. Experimentally, the variation of oil film thickness was measured by the electrical resistance method from the beginning to the ending of a tooth mating, using specially manufactured test gears which do not form a parallel resistance circuit even in mating of two pairs of teeth. The theoretical result is in good agreement with the experimental results particularly at the beginning part of mating. It is clarified that the principle of oil film formation on mating tooth surfaces can be fundamentally explained by the dynamic lubrication theory which is introduced in this paper.
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