高速双驱动耦联轴系横振模态分析及实验

发布时间：2018-09-15 19:21

【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。
[Abstract]:The application of high-speed double-drive shafting is mainly focused on the aero-engine transmission system. In the actual working condition, in order to realize the high speed rotation in the same direction and reverse direction, the modal analysis can accurately predict the natural frequency and critical speed of the coupling shaft system, which is of great significance to avoid resonance. Based on the 3D modeling software UG, the coupling shaft system with bearing constraints is modeled. Combined with the finite element simulation software ANSYS Workbench, an axial force is applied to the outer ring of the diagonal contact bearing. In order to simulate the contact between steel ball and inner and outer ring raceway under pretension, the prestressing mode analysis of single shaft system and coupling shaft system is carried out, and the natural frequencies and modal modes of the first four order transverse vibration of single shaft system and coupling shaft system are obtained. It is verified by hammering experiment. Based on the finite element analysis of coupling shaft system, the influence of three groups of supporting bearings and one group of coupling bearing parameters on the natural frequency of coupling shaft system is explored by changing some parameters of four groups of bearings. It can realize the fine tuning of the natural frequency of the coupling shafting with different order.
【作者单位】：河南科技大学机电工程学院;河南省机械设计及传动系统重点实验室;洛阳LYC轴承有限公司航空精密轴承国家重点实验室;
【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)
【分类号】：TH132

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