CAJ | 학술논문

基于弹性流体动力润滑方程,重新推导球轴承点接触区油膜阻尼系数的计算模型.对比分析该模型方程与纯挤压情况下的拟稳态点接触弹流动力润滑方程,并依据模型方程解与考虑振动的弹流动力润滑方程解之间的关系,提出新的求解方法及过程,给出考虑热效应和球轴承点接触特点的修正计算模型,确定迭代边界条件并进行求解.结果表明,模型解与理论预测结果相符,证明该模型计算结果具有可信性.分析各因素对油膜阻尼黏度系数的影响,表明油膜黏度阻尼系数随接触面间润滑油卷吸速度、润滑油初始黏度的增大而减小,随接触区法向载荷的增大而增大.
기우탄성류체동력윤활방정,중신추도구축승점접촉구유막조니계수적계산모형.대비분석해모형방정여순제압정황하적의은태점접촉탄류동력윤활방정,병의거모형방정해여고필진동적탄류동력윤활방정해지간적관계,제출신적구해방법급과정,급출고필열효응화구축승점접촉특점적수정계산모형,학정질대변계조건병진행구해.결과표명,모형해여이론예측결과상부,증명해모형계산결과구유가신성.분석각인소대유막조니점도계수적영향,표명유막점도조니계수수접촉면간윤활유권흡속도、윤활유초시점도적증대이감소,수접촉구법향재하적증대이증대.
Based on point contact elastohydrodynamic lubrication (EHL)equation,the calculation model of oil-film damping on point contact area of ball bearing was re-deduced,and the model equation was compared with the point contact pure squeeze EHL equation. According to the relationship between this calculation model solution and EHL equation solu-tion,a new method for solving this model was proposed. A revise equation was deduced considering ball bearing contact characteristic and thermal effect,and the boundary conditions were given for calculation. The solutions of the damping cal-culation model correspond to the theoretical predict results,which shows the dependability of this model. The effects of lu-bricant entrainment velocity and initial viscosity,and the contact load on oil-film damping were analyzed. The results show that the oil-film damping is decreased with the increase of lubricant entrainment velocity or lubricant initial viscosity,and increased with the increase of contact load.