摘要
为了进一步提高中速磨煤机磨煤效率,以ZGM113型中速磨煤机为例,通过有限元法对中速磨煤机流场分析及结构优化进行了研究。研究发现,在磨盘的周边,流体呈逆时针方向转动,入口区域出现了少量涡流,抑制流体的旋转,在进风口的两侧与中心出现了低速区,在一定程度上对流体进行了阻挡;入口段与漩涡所在风环处的压力存在较大差异,压力差最高达到了5130 MPa,影响磨煤机出力,提高能耗水平,不利于磨煤机的运行。以此为基础,提出风室改造方案,并通过实践应用验证了改造方案显著提升了磨煤机效率,为磨煤机在火电厂运行提供技术支持。
To further enhance the grinding efficiency of medium-speed coal mills,this study employs the finite element method to analyze the flow field and optimize the structure of the ZGM113 medium-speed coal mill.The study revealed that fluid rotates counterclockwise around the periphery of the grinding disc.A small vortex appears in the inlet region,suppressing fluid rotation.Low-velocity zones form on both sides and at the center of the air inlet,partially obstructing fluid flow.Significant pressure dfferences exist between the inlet section and the vortex-affected air ring,with the maximum pressure differential reaching 5130 MPa.This affects the mil's output capacity,increases energy consumption,and adversely impacts operational performance.Based on these findings,an air chamber modification plan was proposed.Practical application validated the feasibility of this modification,significantly enhancing mill efficiency and supporting the mill's enhanced role in thermal power plant operations.
作者
李丰
Li Feng(Ewenke Power Plant,Inner Mongolia Mengdong Energy Co.,Ltd.,Inner Mongolia Electric Power Co.Ltd.,State Energy Group,Hulunbuir Inner Mongolia 021000,China)
出处
《机械管理开发》
2025年第10期184-186,共3页
Mechanical Management and Development
关键词
中速磨煤机
流场分析
风室
medium-speed coal mill
flow field analysis
air chamber
