摘要
铅铋轴承是新一代核电站二回路主循环系统重要组成部分,用于支撑整个转轴系统。针对轴承存在的动力学特性和润滑机制尚不清晰等问题,建立铅铋轴承流体动力学模型,研究间隙、转速、偏心率和有无环形导流槽对铅铋轴承液膜流体动力学特性的影响,揭示压力峰值与转速、偏心率和间隙的变化关系,探明间隙对动压效应形成规律的影响。研究结果显示环形导流槽对承载力和摩擦因数的影响远小于无环形导流槽,最大压力随着转速、偏心率的增大而增大,随着间隙的增大而减小,最小压力与最大压力结果相反。研究结果为新型高温液态金属润滑轴承设计研发及国产化提供了理论依据。
Lead-Bismuth bearing is the significant part of the main loop system of the two-circuit of the new generation nuclear power plant,which is applied to prop up the entire shaft system.Considering the dynamic characteristics and lubrication mechanism is not clear,the hydrodynamic model of lead bismuth bearing was established and the influences of clearance,rotatory velocity,eccentricity ratio and annular groove on hydrodynamic characteristics of liquid film of lead bismuth bearing were investigated.The relationship between peak pressure and rotating speed,eccentricity and clearance was revealed,and the influence of clearance on the formation law of dynamic pressure effect was explored.The results show that the influence of the annular guiding groove on the load-bearing capacity and the dimensionless coefficient of friction is much less than that of without annular guiding groove.In addition,the maximum pressure is positive correlation with rotation speed and eccentricity ratio,and is negative correlation with clearance.Besides that,the minimum pressure is opposite to the maximum pressure.The research results provide firm theoretical basis for the design,development and localization of novel high-temperature liquid metal lubricated bearings.
作者
解忠良
焦见
杨康
符江锋
何涛
XIE Zhongliang;JIAO Jian;YANG Kang;FU Jiangfeng;HE Tao(Department of Engineering Mechanics,Northwestern Polytechnical University,Xi’an Shaanxi 710072,China;School of Mechanical-Electric Engineering,Xidian University,Xi’an Shaanxi 710071,China;Institute for Performance and Reliability of Propulsion Control Systems(IPRPCS),School of Power and Energy,Northwestern Polytechnical University,Xi’an Shaanxi 710072,China;Wuhan Second Ship Design Institute,Wuhan Hubei 430205,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2023年第4期1-12,共12页
Lubrication Engineering
基金
国家自然科学基金项目(52105205)
中国-中东欧国家高校联合教育项目(2021101)。
关键词
铅铋轴承
二回路主循环系统
流体动力学特性
润滑机制
核主泵系统
PbBi bearing
two-circuit main loop system
hydrodynamic characteristics
lubrication mechanism
nuclear main pump system
