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Nonlinear dynamic modeling and analysis of orbiting and fixed scroll pair in scroll compressors considering radial-axial clearance coupling.

Author(s) : YANG X-L., PENG B., QI X-Y., SHI J-F., LIAO Z-X., ZHANG Y-B.

Type of article: IJR article

Summary

Despite their energy efficiency, scroll compressors suffer from poorly understood noise and vibration issues caused by radial and axial clearances in the orbiting and fixed scroll pair (OFSP). Existing models cannot simultaneously model these coupled clearances, limiting insight into vibration mechanisms and instability thresholds. This study established a radial-axial coupled nonlinear dynamic model of OFSP, integrating time- varying meshing stiffness, meshing errors, friction, gas forces, centrifugal forces, and clearances. The multi- state vibrations and nonlinear dynamics under parameter variations are investigated using phase diagrams, bifurcation diagrams, and largest Lyapunov exponent. Four distinct vibration states are revealed under radial- axial clearance coupled effect. Axial separation or radial disengagement expands phase trajectories and am plifies vibrations. Axial vibration significantly exceeds radial meshing-induced vibration. Reducing load factor or increasing error fluctuation amplitude triggers bifurcation and chaos. Bifurcation induces dynamic instability, alters motion patterns, and causes scroll disengagement or separation, exacerbating vibrations. Bifurcation points reveal the parameter threshold for system dynamic instability, which should be avoided in engineering appli cations. This study proposes the first theoretical framework elucidating the nonlinear vibration mechanisms of OFSP under coupled clearances, providing essential guidelines for designing efficient, low-noise, and reliable scroll compressors and informing future vibration control strategies.

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Pages: 12 p.

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Details

  • Original title: Nonlinear dynamic modeling and analysis of orbiting and fixed scroll pair in scroll compressors considering radial-axial clearance coupling.
  • Record ID : 30034495
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 181
  • Publication date: 2026/01
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2025.10.002

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