Sealing isolation structure of compression expander supported by electromagnetic bearing

The utility model relates to the technical field of compression expanders, in particular to a compression expander sealing isolation structure supported by an electromagnetic bearing. A sealing isolation structure of a compressor-expander supported by an electromagnetic bearing comprises a sealing shell assembly, a floating sealing ring assembly, a labyrinth sealing ring and a rotating shaft. The sealing device has the advantages that the sealing mode of combining labyrinth sealing and improved floating ring sealing is adopted, the advantages of the two sealing modes are fully utilized, the sealing device is more suitable for high-pressure working media, and the leakage amount of the working media is reduced to the maximum extent. 本实用新型涉及压缩膨胀机技术领域，尤其涉及一种电磁轴承支撑压缩膨胀机密封隔离结构。一种电磁轴承支撑压缩膨胀机密封隔离结构，包括：密封壳组件、浮动密封环组件、迷宫密封环、转轴。本实用新型的有益效果是：采用迷宫密封和改进型浮环密封相结合的密封方式，充分利用两种密封形式的优点，更适合较高压力工作介质，最大限度减少工作介质的泄漏量。