基于CFD的桃形腔偶合器流场分析及结构优化  

Flow Field Analysis and Structure Optimization of Peach Shaped Chamber Hydrodynamic Coupling Based on CFD

作　　者：张德生[1] 赵继云[1] 刘立宝[1] 陆文程[1] 

机构地区：[1]中国矿业大学机电工程学院,江苏徐州221116

出　　处：《中国矿业大学学报》2010年第5期687-692,共6页Journal of China University of Mining & Technology

基　　金："十一五"国家科技支撑计划项目(2008BAB36B04);江苏省研究生科研创新计划项目(CX09B_112Z)

摘　　要：为开发具有高运行效率和优良限矩性能的偶合器,满足大功率刮板输送机软启动要求,利用流体动力学(CFD)FLUENT软件对桃形腔偶合器满充状态流场进行了仿真分析,并对其传递扭矩进行了预测.采用运动参考系模型(MRF)处理泵轮和涡轮之间相对转差关系;运用多边形网格来改善网格质量,通过与参考模型试验力矩系数值的对比验证了CFD方法的有效性.扭矩预测值表明标准桃形流道过载系数达到了6.65,无法满足刮板输送机使用要求,基于流场分析提出了挡流板、低叶片及其组合结构3种涡轮型式.结果表明:低叶片和挡流板组合结构型式的桃形腔偶合器可以在降低过载系数至4.5的前提下保持较高工作效率,较好满足大功率刮板输送机使用要求.In order to develop hydrodynamic couplings with high running efficiency and excellent torque-limiting performance to satisfy the soft-start demand of large power armoured face conveyor（AFC）, the flow field of peach shaped chamber hydrodynamic coupling with full-filled status was analyzed and the transmission torque was forecasted using a FLUENT computational fluid dynamic（CFD） software. The moving reference frame （MRF） model was applied to simulate the relative motion between pump wheel and turbo wheel. The polyhedra mesh was used to improve the mesh quality. The CFD method was proved valid through comparing the moment coefficients between reference hydrodynamic coupling and simulation model. The simulating result of moments shows that the overload coefficient of standard peach shaped chamber reaches 6.65 which is too large to satisfy the demand of lager power AFC. Three kinds of turbo wheel which are flow-blocking plate type, low blade type and their combination type are proposed based on the flow filed analysis. The results show that the combination type can reduce the overload coefficient to 4.5, and can keep high working efficiency and meet the requirements of large power AFC well.

关 键 词：偶合器 CFD 桃形腔 流场分析 结构优化 

分 类 号：TH137.331[机械工程—机械制造及自动化] TD528[矿业工程—矿山机电]