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March 1, 2026ProcessesOpen Access

Design Method and Performance Analysis of the Variable-Radius and Variable-Pitch Rotor for Screw Vacuum Pumps

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Authors

XYXunwang YangChinese Academy of SciencesYDYujie DuChinese Academy of SciencesZPZhongyu Piao

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Implication

Demonstrates improved screw vacuum pump performance with a new rotor design, suggesting better efficiency.

Key Points

  • The central aim is to enhance the performance of screw vacuum pumps through a new rotor design featuring variable radius and pitch.
  • Proposed a variable-radius and variable-pitch rotor design with a seven-segment smooth profile.
  • Developed a thermodynamic model simulating pump performance with four leakage channels.
  • Conducted systematic analysis on the impact of key parameters on geometric characteristics and performance.
  • Performed comparative studies against traditional constant cross-section rotors.
  • The design method enables quick generation of new 3D rotor models.
  • Clearance optimization confirms expected improvements in pump efficiency.
  • Proposed rotor design achieves a significantly higher internal volume ratio.
  • Shaft power is reduced by 52.9% when compared to equal-pitch rotors.
  • The variable-radius and pitch combination significantly enhances sealing and structural integrity.

Cite This Study

Yang et al. (2026) studied this question.

synapsesocial.com/papers/69a3d7ccec16d51705d2e238https://doi.org/10.3390/pr14050784
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Also Consider

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  5. 5Analysis of Flow Characteristics in a Hydrogen Circulation Pump Featuring a Variable Radius Circular Arc2025 · 1 citations