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<p>Eucommia ulmoides samara contains Eucommia rubber, and a critical step in its industrial production lies in efficient crushing. This study proposes a novel crushing mechanism designed for Eucommia samara, characterized by its simplicity, practicality, and low application cost. The mechanism employs a dual-crushing strategy using fixed blade saws and rotating blade saws, while a variable-pitch structure within the crushing chamber enhances overall crushing efficiency. Based on this design, the dynamic characteristics of the rotor system were analyzed, revealing that the critical speed of the rotor system significantly exceeds the operational speed of the machinery. Harmonic response analysis was conducted to evaluate unbalanced responses caused by manufacturing errors, demonstrating that the rotor’s vibration amplitude remains controllable under non-critical speeds. A discrete element simulation model of the Eucommia samara-crusher system was established to investigate the influence of key parameters on crushing performance. Response surface methodology was applied to optimize parameters, yielding an optimal parameter set under specified conditions. The simulation results showed a minimal deviation of 2.964 % from the predicted values, validating the reliability of the proposed design and analytical approach.</p>

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Dynamic characteristic analysis and parameter optimization of a DEM-based crushing and cutting device for Eucommia ulmoides samaras

  • 期刊论文

  • 发表日期：

    2026年5月11日

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  • Lei Wang,
  • Qifa Zhao,
  • Chen Zhang,
  • Guoqiang Liu,
  • Kairui Wang

摘要

Eucommia ulmoides samara contains Eucommia rubber, and a critical step in its industrial production lies in efficient crushing. This study proposes a novel crushing mechanism designed for Eucommia samara, characterized by its simplicity, practicality, and low application cost. The mechanism employs a dual-crushing strategy using fixed blade saws and rotating blade saws, while a variable-pitch structure within the crushing chamber enhances overall crushing efficiency. Based on this design, the dynamic characteristics of the rotor system were analyzed, revealing that the critical speed of the rotor system significantly exceeds the operational speed of the machinery. Harmonic response analysis was conducted to evaluate unbalanced responses caused by manufacturing errors, demonstrating that the rotor’s vibration amplitude remains controllable under non-critical speeds. A discrete element simulation model of the Eucommia samara-crusher system was established to investigate the influence of key parameters on crushing performance. Response surface methodology was applied to optimize parameters, yielding an optimal parameter set under specified conditions. The simulation results showed a minimal deviation of 2.964 % from the predicted values, validating the reliability of the proposed design and analytical approach.