冲击刀具破碎机模态分析及其减振优化
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天津科技大学机械工程学院

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中图分类号:

TH113

基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目)


Modal analysis and vibration reduction optimization of impact tool crusher
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Affiliation:

College of Mechanical Engineering, Tianjin University of Science and Technology

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    冲击刀具破碎机在工作时会产生较大激振。为研究破碎机振动和固有频率之间的关系,避免共振现象的产生,以某冲击刀具破碎机为研究对象,运用有限元软件建模分析其计算模态,通过力锤敲击激励实验测试其实验模态,并将计算模态与实验模态进行对比。结果表明冲击刀具破碎机的前8阶固有频率集中在133.28Hz到272.18Hz之间,且主要变形部件集中在入料口、轴承座、储料箱后壁、主轴、反击板 5 个部件。对主轴进行动态分析以及外壳结构进行优化之后,破碎机的工作频率很好的避开了共振频率范围,为冲击刀具破碎机的减振改进设计提供了数值依据,也为破碎产品的减振优化提供了一种行之有效的方法。

    Abstract:

    The impact cutter crusher will produce large excitation during operation. In order to study the relationship between the vibration and natural frequency of the crusher and avoid the occurrence of resonance, the finite element software is used to analyze the calculation mode of the impact tool crusher, the experimental mode is tested through the hammer percussion excitation experiment to check the calculation mode. The results show that the first 8 natural frequencies of the impact tool crusher are concentrated between 133.28 Hz and 272.18 Hz, and the main deformation parts are concentrated in five parts: feed inlet, bearing seat, rear wall of storage box, main shaft and impact plate. After the dynamic analysis of the main shaft and the optimization of the shell structure, the working frequency of the crusher well avoids the resonance frequency range, which provides a numerical basis for improved design of vibration reduction of the impact tool crusher and an effective method for the optimization of vibration reduction of crushed products.

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引用本文

刘学哲,平学成. 冲击刀具破碎机模态分析及其减振优化[J]. 科学技术与工程, , ():

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历史
  • 收稿日期:2021-09-28
  • 最后修改日期:2022-04-23
  • 录用日期:2022-04-28
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