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<p>To address the persistent issues of sealing leakage, low efficiency, and high vibration in traditional drive structures for sealed pressure systems, this paper, taking the NSR300 Roots steam compressor as a case study, proposes a novel isolated magnetic coupling device that combines a Halbach array with a slotted conductor disk. Through magnetic circuit analysis and finite element modeling, the magnetic field performance of four typical configurations (slotless-NS, slotted-NS, slotless-Halbach, and slotted-Halbach) was compared, followed by a multi-objective optimization using a fuzzy logic and sequential Taguchi method. The optimization results demonstrate that the device can achieve a wide speed range of 27–100%, possesses excellent axial force control, and maintains low eddy current loss. Furthermore, a multiphysics analysis reveals that the device utilizes 80&#xa0;°C waste steam from within the system to effectively cool the conductor disk, converting eddy current thermal losses generated by transmission slip into usable thermal energy, thereby achieving heat recovery. Consequently, when this recovered energy is considered, the device's overall efficiency reaches as high as 97.3%, while its structural stress remains far below the material limit. This proposed method of non-contact, flexible energy transmission provides a new solution for high-power energy transfer in sealed pressure systems operating under high-temperature, high-pressure environments, like Roots steam compressors, offering high power density, superior sealing integrity, and enhanced system efficiency.</p>

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Design and optimization of an isolated magnetic coupling device for high-temperature sealed power transmission

  • 期刊论文

  • 发表日期：

    2025年9月2日

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  • Feng Zhou,
  • BangShuo Du,
  • XinYuan Wang,
  • YanPing Liu,
  • Wei Wang

摘要

To address the persistent issues of sealing leakage, low efficiency, and high vibration in traditional drive structures for sealed pressure systems, this paper, taking the NSR300 Roots steam compressor as a case study, proposes a novel isolated magnetic coupling device that combines a Halbach array with a slotted conductor disk. Through magnetic circuit analysis and finite element modeling, the magnetic field performance of four typical configurations (slotless-NS, slotted-NS, slotless-Halbach, and slotted-Halbach) was compared, followed by a multi-objective optimization using a fuzzy logic and sequential Taguchi method. The optimization results demonstrate that the device can achieve a wide speed range of 27–100%, possesses excellent axial force control, and maintains low eddy current loss. Furthermore, a multiphysics analysis reveals that the device utilizes 80 °C waste steam from within the system to effectively cool the conductor disk, converting eddy current thermal losses generated by transmission slip into usable thermal energy, thereby achieving heat recovery. Consequently, when this recovered energy is considered, the device's overall efficiency reaches as high as 97.3%, while its structural stress remains far below the material limit. This proposed method of non-contact, flexible energy transmission provides a new solution for high-power energy transfer in sealed pressure systems operating under high-temperature, high-pressure environments, like Roots steam compressors, offering high power density, superior sealing integrity, and enhanced system efficiency.