Abstract
The stability problem prevents the application of water lubricated journal bearing in high speeds conditions. To improve the bearing performance, the lobe pocket with Archimedes helix profile is designed in the water lubricated hydrostatic and hydrodynamic hybrid journal bearing. Bearing stiffness coefficients, damping coefficients and threshold speed are investigated with considering turbulence. Effects of radius clearance, pocket parameters, water supply pressure, restriction parameter and external load are analyzed. The results indicate that decreasing radius clearance and increasing pocket depth both improve the bearing stability, while there are optimal values for pocket widths. The water supply pressure and orifice diameter increase the threshold speed at low speeds. The results obtained provide useful information for designing high stability journal bearings.
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