流固耦合的多层搅拌反应器振动特性研究

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (14) : 133-137.

论文

流固耦合的多层搅拌反应器振动特性研究

胡效东，王灏，王世飞，张景坡，曾庆良

作者信息 +

Analysis of the Multiple-impeller in fluid-structure interaction and vibration characteristics

HU Xiaodong,WANG Hao,ZHANG Jingpo,ZENG Qingliang

Author information +

文章历史 +

摘要

针对某型号搅拌反应器搅拌主轴因振动断裂的问题，基于流固耦合理论，采用CFD和FEM相结合的单向耦合稳态的数值模拟以及经验公式计算方法。在考虑流场作用的条件下分析多种方法得出搅拌器的临界转速结果。分析主轴断裂的原因及影响搅拌器的固有频率的流体因素，并对主轴结构进行改进。得出结论：主轴驱动电机转速大于主轴的最低设计转速是主轴产生振动断裂的主要原因；搅拌介质的流体力和阻尼作用对搅拌器的固有频率均有影响；可以将主轴适当加粗以提高其临界转速，从而远离共振范围并有效解决振动问题；采用流固耦合的方法能够考虑搅拌器转动、流体载荷和搅拌桨叶的影响。其计算结果比经验公式更接近实际情况。

Abstract

For a chemical machinery company of a certain type of mixing reactor stirring spindle due to vibration fault, based on the theory of fluid solid coupling by one-way coupled homeostasis combination of CFD and FEM numerical simulation and empirical formula calculation method. In the condition of considering the effect of the flow field, the critical speed of the mixer was analyzed. The causes of the spindle fracture and the effect of the fluid factors to the frequency mixer was analyzed while the structure of the spindle was improved. Conclusions are as follows: The spindle drive motor speed was greater than the minimum design spindle speed is the main reason for the vibration generated by the main shaft fracture; The effect of fluid force and damping on the natural frequency of the mixer is obvious; Enlargement of diameter could increase the critical speed, which was far away from the resonance range and solved the problem of vibration effectively; The method of fluid solid coupling could be used to consider the influence of the rotation form the agitator, the load of the fluid and the mixing blades. It is more close to the actual situation than the empirical formula.

导出引用

胡效东，王灏，王世飞，张景坡，曾庆良. 流固耦合的多层搅拌反应器振动特性研究[J]. 振动与冲击, 2017, 36(14): 133-137

HU Xiaodong,WANG Hao,ZHANG Jingpo,ZENG Qingliang. Analysis of the Multiple-impeller in fluid-structure interaction and vibration characteristics[J]. Journal of Vibration and Shock, 2017, 36(14): 133-137

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