一种移动车载式大吸力离心风机设计  

Design of a Large Suction Centrifugal Fan Mounted on Moving Vehicles

作　　者：詹晓华 ZHAN Xiao-hua(Minxi Vocational&Technical College,Longyan Fujian 364021,China)

机构地区：[1]闽西职业技术学院,福建龙岩364021

出　　处：《兰州工业学院学报》2020年第4期62-66,共5页Journal of Lanzhou Institute of Technology

基　　金：2019年度福建省教育厅中青年教师教育科研项目(科技类)项目(JAT191536)。

摘　　要：为解决传统离心风机存在吸力弱、负压失衡,维修复杂等问题,提出一种移动车载式大吸力离心风机设计.通过分析离心风机不同进风口的风道流动场和温度场,重新设计离心风机的风道形式;利用CFD软件模拟移动车载式大吸力离心风机风道内部流场三维数值,对其获取的参数进行优化,以优化离心机风道;在理论计算模型指导有限元建模和简化参数基础上,建立车载式大吸力离心风机三维模型;利用模态分析与和谐响应分析进行整机性能分析;采取微元体分析法,利用离心风机轴承箱内的负压平衡轴承旋转产生离心力.结果表明:设计的移动车载式大吸力离心风机吸力较强,负压较为平衡,具有一定的可行性.In order to solve the problems of weak suction, unbalanced negative pressure and complex maintenance of traditional centrifugal fan, a design of centrifugal fan with large suction mounted on mobile vehicle is presented. By analyzing the flow field and temperature field of different air inlets of the centrifugal fan, the air duct form of the centrifugal fan is redesigned. The three-dimensional numerical value of the flow field inside the air duct of the mobile centrifugal fan with large suction is simulated by CFD software, and the parameters obtained are optimized to optimize the air duct of the centrifugal fan. On the basis of the theoretical calculation model guiding the finite element modeling and simplifying the parameters, the three-dimensional model of the vehicle mounted centrifugal fan with large suction is established. The modal analysis and harmonic response of the whole machine performance are used, and the micro element analysis method is adopted, the negative pressure in the bearing box of the centrifugal fan is used to balance the rotation of the bearing to generate the centrifugal force. The experimental results show that the mobile centrifugal fan designed in this paper has strong suction and relatively balanced negative pressure, which is feasible.

关 键 词：离心机 风道 三维模型 密封流体力学 风机轴承 

分 类 号：TH113[机械工程—机械设计及理论]