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The lubrication characteristics of the vane tip under inlet pressure boundary conditions for an oil hydraulic vane pump |
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| Authors: | Ihn-Sung Cho Seok-Hyung Oh Jae-Youn Jung |
| Affiliation: | 1. Division of Mechanical & Aerospace System Engineering, Chonbuk National University, #664-14, 1 Ga, Jeonbuk 561-756, Duckjin-dong, Duckjin-ku, Jeonju, Korea 2. Faculty of Mechanical Engineering, Kunsan National University, san 68, Miryong-dong, Jeonbuk 573-701, Kunsan, Korea 3. Division of Mechanical & Aerospace System Engineering and RCIT, Chonbuk National University, #664-14, 1 Ga, Duckjin-dong, Duckjin-ku, Jeonbuk 561-756, Jeonju, Korea |
| Abstract: | The lubrication modes of line contact between the vane and the camring in an oil hydraulic vane pump have been investigated. First, variations of the radial acting force of a vane were calculated from previously measured results of the dynamic internal pressure in four chambers surrounding a vane. Next, distinctions of the lubrication modes were made using Hooke’s chart, which represents an improvement over Johnson’s chart. Finally, the influence of boundary conditions in the lubrication region on fluid film lubrication was examined by calculating film pressure distributions. The results show that the lubrication modes of the vane tip are a rigidvariable viscosity region. This region discharges pressure higher than 7 MPa, and exerts a great influence on oil film pressure in the large arc section due to the Piezo-viscous effect. |
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