A novel hydrogen turbo-expander with active magnetic bearings and an eddy current brake

被引：1
|
作者：
Chen, J. Y. [1 ,2 ]
Li, X. M. [1 ,2 ]
Dong, X. B. [1 ,2 ]
Lv, C. [1 ]
Wu, J. H. [1 ,2 ]
机构：
[1] Chinese Acad Sci, Tech Inst Phys & Chem, State Key Lab Technol Space Cryogen Propellants, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
ADVANCES IN CRYOGENIC ENGINEERING | 2020年 / 755卷
关键词：
D O I：
10.1088/1757-899X/755/1/012033
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A cryogenic expander for hydrogen liquefier with active magnetic bearings (AMB) has been designed and will be made and tested. The shaft design and strength review are significant factors for the turbine since it affects the performance and safety of the expander significantly. In order to produce lower temperature hydrogen, the liquefier needs a very small and high-speed turbo-expander. However, there are few studies on expander with both active magnetic bearings and eddy current brakes. In this study, the speed of the turbine is up to 100000 rpm. Its cooling power is about 4kW. The inlet pressure is 1MPa, and the outlet pressure is 0.7MPa.Under this condition, the turbine is designed, and the simulation is done. An eddy current brake which can govern the rotational speed quickly is designed and studied as well.
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页数：8
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