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<p>The Variable Stator Vane (VSV) mechanism serves as a critical component in high-pressure compressors for airflow direction control, where the dynamic behavior of vanes directly determines service performance. This study develops a spatial clearance modeling approach for VSV vane-bushing pairs, establishing analytical formulations for both axial and radial minimum clearances while identifying ten distinct spatial contact modes. The implemented dynamic model successfully captures clearance effects in VSV mechanisms. Results demonstrate that despite inducing deviations in vane’s centroid position, velocity, and acceleration profiles, the vane-bushing pair maintains stable three-point contact (contact mode 7) for over 95% of the operational cycle. Clearance dimensions significantly influence dynamic characteristics and stability, with radial clearance exhibiting particularly strong positive correlation with attitude angle deviations. These findings elucidate fundamental dynamics of clearance-affected VSV systems and provide essential foundations for subsequent wear evolution studies.</p>

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Dynamic characteristics of the Variable Stator Vane mechanism: spatial motion and clearance effects

  • 期刊论文

  • 发表日期：

    2026年1月13日

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  • Ke He,
  • Kaiyi Huang,
  • Zhen Li,
  • Shuhui Hu,
  • Zhinan Zhang

摘要

The Variable Stator Vane (VSV) mechanism serves as a critical component in high-pressure compressors for airflow direction control, where the dynamic behavior of vanes directly determines service performance. This study develops a spatial clearance modeling approach for VSV vane-bushing pairs, establishing analytical formulations for both axial and radial minimum clearances while identifying ten distinct spatial contact modes. The implemented dynamic model successfully captures clearance effects in VSV mechanisms. Results demonstrate that despite inducing deviations in vane’s centroid position, velocity, and acceleration profiles, the vane-bushing pair maintains stable three-point contact (contact mode 7) for over 95% of the operational cycle. Clearance dimensions significantly influence dynamic characteristics and stability, with radial clearance exhibiting particularly strong positive correlation with attitude angle deviations. These findings elucidate fundamental dynamics of clearance-affected VSV systems and provide essential foundations for subsequent wear evolution studies.