Development of an Ultra-High-Speed Passive Self-Levitating Permanent Magnet Support System for Hydrogen Environments

Hydrogen, as a distinctive energy carrier, offers significant advantages in clean energy transition yet faces numerous technical challenges. To address limitations in ultra-high-speed rotating machinery applications in hydrogen environments, this study proposes a passive self-levitating permanent magnet support system (PPMSS). A comprehensive simulation model was established to analyze structural integrity and magnetic levitation force, integrated with Design of Experiments (DoE) methodology to develop a data prediction model for permanent magnet rotor structural strength with maximum deviation below 2.19%, significantly enhancing design efficiency. Optimization yielded optimal PPMSS parameters, achieving 15.917N support force with merely 0.917N initial comprehensive axial force. Finally, the magnetic force simulation results were validated through quasi-static experimental measurements, while the structural performance at 88,000 RPM was verified via theoretical thin-walled ring analysis. Full-assembly high-speed rotor-dynamic stability has not yet been experimentally demonstrated and is reserved for future work. The PPMSS employs magnetic forces for rotor suspension without external energy input or medium intervention, fundamentally eliminating mechanical friction and wear while featuring maintenance-free operation and extended service life, demonstrating promising applications in hydrogen energy industry development.