惯性离心和热弹变形对大尺寸高速高压推力加载装置性能的影响
发布时间：2018-10-17 22:01
【摘要】：以某反应堆主泵推力滑动轴承试验台加载装置为研究对象,考虑惯性离心作用和润滑油粘温效应,基于N-S方程建立三维油膜热流固耦合有限元分析模型,研究惯性离心和热弹变形对原型大尺寸高速高压推力加载装置承载性能的影响,并对加载装置进行结构改进计算与试验,为实际大尺寸推力加载装置设计与应用提供重要依据和参考。结果表明:高转速惯性离心作用改变加载装置内部流动,增加入口油压可以有效提高承载能力;热弹变形对承载力有显著影响,考虑润滑油粘温效应使油膜承载力降低12.6%;当热弹变形量过大将导致油膜破裂,加载装置由液体润滑状态变为干摩擦状态,发生烧瓦停机现象;将原环形整体单腔结构改进成扇形三腔结构油膜承载力较初始结构提高了22.5%;改进装置加载试验验证了改进方案的可行性和数值模拟方法的适用性。
[Abstract]:Taking the loading device of thrust sliding bearing of a reactor main pump as the research object, considering the effect of inertial centrifugation and lubricant viscosity temperature, a three-dimensional finite element analysis model of oil-film heat fluid-solid coupling is established based on N-S equation. The influence of inertial centrifugation and thermoelastic deformation on the load-bearing performance of the prototype large-size high-speed high-pressure thrust loading device is studied, and the structural improvement calculation and test of the loading device are carried out. It provides important basis and reference for the design and application of practical large-scale thrust loading device. The results show that the high rotational speed inertial centrifugation can change the internal flow of the loading device, increase the inlet oil pressure can effectively improve the bearing capacity, and the thermoelastic deformation has a significant effect on the bearing capacity. Considering the viscous temperature effect of lubricating oil, the bearing capacity of oil film is reduced by 12.6%, when the amount of thermoelastic deformation is too large, it will lead to oil film rupture, the loading device will change from liquid lubrication state to dry friction state, and the phenomenon of burning tile will be stopped. The oil film bearing capacity of the original annular monolithic cavity is improved by 22.5% than that of the initial structure, and the feasibility of the improved scheme and the applicability of the numerical simulation method are verified by the loading test of the improved device.
【作者单位】： 湘潭大学机械工程学院;
【基金】：国家自然科学基金项目(51305377) 教育部留学回国人员科研启动基金(教外司留[2015]1098号)
【分类号】：TH133.31
本文编号：2278143
[Abstract]:Taking the loading device of thrust sliding bearing of a reactor main pump as the research object, considering the effect of inertial centrifugation and lubricant viscosity temperature, a three-dimensional finite element analysis model of oil-film heat fluid-solid coupling is established based on N-S equation. The influence of inertial centrifugation and thermoelastic deformation on the load-bearing performance of the prototype large-size high-speed high-pressure thrust loading device is studied, and the structural improvement calculation and test of the loading device are carried out. It provides important basis and reference for the design and application of practical large-scale thrust loading device. The results show that the high rotational speed inertial centrifugation can change the internal flow of the loading device, increase the inlet oil pressure can effectively improve the bearing capacity, and the thermoelastic deformation has a significant effect on the bearing capacity. Considering the viscous temperature effect of lubricating oil, the bearing capacity of oil film is reduced by 12.6%, when the amount of thermoelastic deformation is too large, it will lead to oil film rupture, the loading device will change from liquid lubrication state to dry friction state, and the phenomenon of burning tile will be stopped. The oil film bearing capacity of the original annular monolithic cavity is improved by 22.5% than that of the initial structure, and the feasibility of the improved scheme and the applicability of the numerical simulation method are verified by the loading test of the improved device.
【作者单位】： 湘潭大学机械工程学院;
【基金】：国家自然科学基金项目(51305377) 教育部留学回国人员科研启动基金(教外司留[2015]1098号)
【分类号】：TH133.31
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