基于Flow Simulation的高风压离心式风机设计

Design of Centrifugal Blower with Hight Wind Pressure Based on Flow Simulation

离心式风机的风压与其径向尺寸有着紧密的联系,设计时如果要求结构尺寸紧凑又要达到比较大的风压时会很难兼顾。设计过程尝试了从改进叶轮结构形状和叶片的安装角度来解决这一问题。通过气动力计算得到了叶片安装的入口和出口角度及相关尺寸,最终采用了前向型叶轮结构。依据计算的几何参数借助Solidworks三维设计软件建立了风机的几何模型。最后利用软件的Flow Simulation模块对风机进行了风压和流速的数值模拟分析,分析结果显示选用的前向型叶片满足了设计要求。

There is a close connection between the wind pressure and the radial size of the centrifugal blower. It is difficult to design a blower with larger wind pressure when it requires a compact structure. We try to solve this problem by improving impeller shape and the installation angle of blade during this design. The inlet angle, outlet angle and relative dimensions of the blade installation are obtained through aerodynamic calculation, and finally the forward impeller structure is adopted. According to the geometric parameters calculated, the geometric model of the blower is established in the 3D design software of Solidworks. Finally, the wind pressure and flow velocity are simulated and analyzed in the Flow Simulation module of the software. The results show that the forward blade selected meets the design requirements.