矿用离心风机关键部件有限元分析

Finite Element Analysis of Key Components of Mining Centrifugal Fans

针对矿用离心风机关键部件受力特性复杂时常发生叶轮故障,影响矿井安全开采作业。以G4-73No.8D型离心风机作为分析对象,研究了离心式通风机结构组成和工作原理,采用数值模拟分析法搭建了离心风机物理模型,并在Fluent流体软件中对离心风机叶轮进行有限元仿真,结果表明,风机在不同截面上的动压是呈现出逐渐升高的趋势,沿风机气流方向流场趋于复杂化,当风机的流量较低时的压力较小,并且飞机容易进入不稳定工作区。在软件中设定增大叶轮的外径和出口宽度,对叶轮进行优化后仿真,优化后的风机叶轮在全流量作用下的全压和效率都明显提高,全压平均提高了3.8%,效率提高了1.7%,取得了满意的优化效果,研究结论对于后期提高风机性能的研究奠定基础和参考。

The key components of mining centrifugal fan have complex force characteristics and impeller failure often occurs,which affects the safe mining operations in mines.G4-73No.8D centrifugal fan as an analytical object,the study of centrifugal ventilator structure composition and working principle,using numerical simulation analysis method to build a centrifugal fan physical model,and in Fluent fluid sofware for centrifugal fan impeller finite element simulation,the results show that the fan in different cross-section of the dynamic pressure is to present a trend of gradual increase in the direction of the airflow along the fan flow field tends to be Complexity,when the flow rate of the fan is lower when the pressure is smaller,and the aircraft is easy to enter the unstable work area.In the software set to increase the outer diameter of the impeller and outlet width,the impeller optimization simulation,optimized fan impeller in the full flow under the role of the full pressure and efficiency are significantly improved,the full pressure increased by an average of 3.8%,the efficiency increased by 1.7%,a satisfactory optimization effect,the conclusions of the study for the later to improve the performance of the fan to lay the foundation for the study and reference.