Six water lubricated bearings with different clearance were designed to solve lubricating pro blems in high pressure pumps for seawater desalination. The models were built by three dimensional software Pro/E.Based on k-ε two equation turbulence model and SIMPLE algorithm, the interior flow field in different bearings clearances and the same bearing clearance at different eccentric distances were numerically simulated and analysed with Fluent software. The relationship of dynamic pressure distribution, bearing capacity, stiffness and bearing clearance were obtained. Simulation results show that the perfor mance of water lubricated bearing is the best at the clearance of 0.2 mm. Simulation results can predict the characteristics of water lubricated bearings， and provide the reference for optimization design and safe operation for high pressure pump.
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