摘要
为了研究流固耦合场对罗茨机械增压器转子强度的影响,文章以Fluent-Ansys为平台,对罗茨机械增压器内部流动进行三维数值模拟,将流场的计算结果作为初始边界条件加载,采用单向流固耦合方法对转子进行仿真计算,获得了不同工况下转子的等效应力及变形情况,分析了转子应力和变形影响因素。结果表明:离心力对转子强度影响较小,转子的应力和变形主要由温度载荷引起,最大等效应力出现在轴承与轴肩连接部位,最大总变形发生在转子排气口的叶轮端面位置;额定工况时,转子最大等效应力为287.22MPa,远小于材料的疲劳极限,最大变形为0.072 9mm,对转子啮合间隙影响较大。
In order to study the impact of fluid-structure coupling field on the strength of the Roots mechanical supercharger rotors,the three-dimensional flow field in Roots mechanical supercharger was numerically simulated based on Fluent-Ansys.The calculation results of the flow field were loaded as the initial boundary conditions and the rotors were simulated by the one-way fluid-structure interaction method.The equivalent stress and deformation values under different operating conditions were obtained,and the factors affecting the stress and deformation of the rotors were analyzed.The research results show that the centrifugal force has little effect on the strength of the rotors,and the stress and deformation of rotors are mainly caused by the thermal load.The maximum equivalent stress value occurs at the bearing and the shaft shoulder joints and the maximum total deformation occurs at the impeller end face of the exhaust port.Under rated operating conditions,the maximum equivalent stress value is 287.22MPa,which is far less than the fatigue limit of the material.The maximum deformation is 0.072 9mm,which has great effect on the meshing clearance of the rotors.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第5期525-529,595,共6页
Journal of Hefei University of Technology：Natural Science
基金
长沙市科技局重点资助项目(K1001017-11)
湖南省散装水泥办公室专项资助项目(201021)
关键词
罗茨机械增压器
转子
流固耦合
数值模拟
强度
Roots mechanical supercharger
rotor
fluid-structure interaction
numerical simulation
strength
