大型贯流泵水润滑导轴承数值模拟

摘要

利用Fluent软件对某大型贯流泵水润滑导轴承内部流场进行数值模拟,研究了不同转速下轴承水膜压力场分布情况,并分析了相关参数对轴承润滑水量及其静态性能的影响.结果表明:轴承水膜在高低转速下压力分布差异较大；动压效应显著时,轴承内部会产生倒流现象从而降低润滑水量；降低半径间隙、增大转速及供水压力能提高轴承承载力及刚度；降低转速、增大供水压力及半径间隙能提高轴承润滑水量.%A numerical simulation for flow field in water-lubricated guide bearing of large tubular pump is conducted by software Fluent, which shows the pressure distribution of water film with different rotating speeds and the rule of the influence of relevant parameters on the amount of lubricating water, dynamic and static characteristics of guide bearing. The result shows that the pressure distributions of water film at low and high speeds are very different, and with the obvious dynamic pressure effect, the bearing inner can be in a state of reflux and the water-lubricated amount and clearance are reduced. The load capacity and stiffness of guide bearing are increased along with the speed and water pressure increase meanwhile the amount of water is increased along with the speed lowering and the water pressure and clearance increase.