基于流固耦合的充气量波动下的浮选机振动响应实验性研究

Experimental study on vibration response of flotation machine under inflating volume fluctuation based on the fluid-structure interaction

浮选机运转工况复杂,转速、气量以及给矿量均在实时变化,这些变化会对内部流场产生影响,并会造成浮选机叶轮的受力变化,进而影响浮选机运转部件的可靠性。为此,建立了能够模拟现场不同工况条件的流-固耦合实验平台,采用了嵌入式微型压力传感器和无线数据传输模块对浮选机叶轮叶片的压力变化情况进行了实时检测,以压力变化检测为手段,通过数据分析揭示了充气量波动条件下的叶轮叶片压力的变化规律,该研究对优化设计浮选机叶轮结构,具有一定的指导意义。

The operating condition of the flotation machine is complex,and the speed,gas volume and feeding are all changing in real time.These changes will have an impact on the internal flow field,and cause the change of the force on the flotation machine impeller,and then affect the reliability of the operating parts of the flotation machine.Therefore,established a fluid-solid coupling experimental platform which can simulate different working conditions on site.Embedded micro pressure sensor and wireless data transmission module are used to detect the pressure change on the impeller blade of the flotation machine in real time.The pressure change detection is used as a means to reveal the pressure change rule on the impeller blade under the condition of inflating volume fluctuation through data analysis.The research has certain guiding significance for optimizing the structure of flotation machine impeller.