摘要
高速双驱动轴系目前的应用领域主要集中在航空发动机传动系统。在实际工况下,两个通过圆柱滚子轴承耦联的转轴要实现同向及反向的高速旋转,模态分析能够准确的预测耦联轴系的固有频率及临界转速,对避免发生共振具有重要意义。基于三维建模软件UG对轴承约束的耦联轴系进行实体建模,结合有限元仿真软件ANSYS Workbench对角接触轴承外圈施加一个轴向力,模拟角接触轴承在受预紧力状态下钢球和内外圈滚道的接触情况,分别对单轴系和耦联轴系进行预应力模态分析,得到单轴系和耦联轴系前四阶横振固有频率及模态振型,并通过锤击实验进行了验证。在耦联轴系有限元分析的基础上,通过改变三组支撑轴承及一组耦联轴承的参数来探究其对耦联轴系固有频率的影响,通过研究发现通过改变四组轴承的一些参数,能够实现对耦联轴系不同阶次的固有频率的微调。
High-speed dual-drive shaft of the current application areas are mainly concentrated in the aero- engine drive system. Under the actual conditions, the two shafts coupled by cylindrical roller bearings to achieve high- speed rotation in the same direction and reverse direction, the modal analysis can accurately predict the natural frequency and critical speed coupling system, to avoid resonance Has important significance. In this paper, based on the three-dimensional modeling software UG, the coupling shaft system of the bearing constraint is modeled, and an axial force is applied to the outer ring of the angular contact bearing with the finite element simulation softwm＇e ANSYS Workbench to simulate the angular eontact bearing under the preload state The single-rotor system and the eoupled shaft system are pre-stressed modal analysis, the natural frequeney and modal shape of the first four-order transverse vibration of single-rotor system and coupling shaft system are obtained, And verified by hammering test. On the basis of finite element analysis of coupled shafting system, the influence of three sets of supporting bearing and a group of coupling bearing on the natural frequency of coupling shaft was studied. By changing some of the four groups of bearing Parameters, can be achieved on the coupling shaft different order of the natural frequency of fine-tuning.
出处
《机械设计与研究》
CSCD
北大核心
2017年第5期26-31,共6页
Machine Design And Research
基金
国家自然科学基金资助项目(51375148)
河南省产学研合作项目(2015HNCXY001)
河南省高校科技创新团队(15IRTSTHN008)
关键词
耦联轴系
固有频率
横振模态
有限元
刚度
Coupling shaft system
Natural frequency
Transverse vibration mode
Finite element
Stiffness
