Slot-entry herringbone grooved hybrid conical bearings under piezo-viscous lubrication
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Date
2025
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Abstract
This study investigates the effect of herringbone groove geometry and piezoviscous shear-thinning fluid (PVSTF) behavior on the performance of slot-entry hybrid conical journal bearings (SHCJBs). Using a modified Reynolds equation solved via finite element analysis and the Gauss–Seidel method, the influence of groove angles (30°, 60°, and 90°), semi-cone angles, and lubricant type on key tribological parameters is examined. The results indicate that a 30° groove angle in combination with PVSTF yields the highest stiffness coefficients and stability margins, while also reducing frictional torque compared to non-grooved designs and Newtonian lubricants. These findings provide design guidance for optimizing bearing geometry and lubricant selection, with applicability to high-performance rotating machinery.
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Keywords
Conical bearings, Slot-entry, Herringbone groove, Piezo-viscous (PV), Shear-thinning, Finite element analysis