油圧べーンポンプベーン先端部の潤滑特性の解析

概要

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The elastohydrodynamic lubrication characteristics of an oil hydraulic vane tip contact with a cam ring have been analyzed numerically under various conditions using a modified Houpert-Hamrock's calculation method provided in the previous paper. Results show that the minimum film thickness in the suction port section is differs little from that in the small arc section and the minimum film thickness in the large arc section is greater than that in the small arc section. Nevertheless the contact load in the suction port section is 2.5 times that in the small arc section for the case of an intravane type and the load in the large arc section is greater than that in the small arc section. The combination of inlet pressure and nonlinear piezoviscous effect causes the increase in oil film thickness in the large arc section. Therefore, it is suggested that the elevating discharge pressure will not cause any lubrication trouble if mineral oil is used as the hydraulic fluid ; the water-based hydraulic fluids present an extreme disadvantage to the vane tip lubrication.
1990-03-25