Abstract
The Lubrication Mode of line contacts between the vane and the camring in an oil hydraulic vane pump has been investigated. First, the variations of the radial force of a vane were calculated from previous measurements of dynamic internal pressure in four chambers surrounding a vane. Next, the lubrication modes were distinguished with Hooke’s chart, which is an improvement over Johnson’s chart. Finally, the influence of the boundary conditions in the lubrication region on the fluid film lubrication was examined by calculating the film pressure distributions. The results showed that the lubrication mode of the vane tip exists in the rigidvariable-viscosity region, and that discharge pressure higher than 7 MPa greatly affects the oil film pressure in the small and the large arc section because of the Piezo-viscous effect.
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References
Cho, I. S., Oh, S. H. and Jung, J. Y., 2005, “The Lubrication Characteristics of the Vane Tip Under the Inlet Pressure Boundary Conditions for an Oil Hydraulic Vane Pump,”Journal of Mechanical Science and Technology, Vol. 19, No. 12, pp. 2179–2186.(Korea)
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Johnson, K. L., 1970, “Regimes of Elasto Hydrodynamic Lubrication,”J Mech. Eng. Sci., Vol. 12, No. 1, pp. 9.
Jung, J. Y. and Jung, S. H., 1998, “A Study on the Characteristics of Internal Dynamic Pressure of Vane Pump,”Journal of KSTLE, Vol. 14, No. 1, pp. 79–84. (Korea)
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Cho, IS., Oh, SH., Song, KK. et al. The Lubrication characteristics of the vane tip under pressure boundary condition of oil hydraulic vane pump. J Mech Sci Technol 20, 1716–1721 (2006). https://doi.org/10.1007/BF02916275
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DOI: https://doi.org/10.1007/BF02916275