燃料电池用水润滑电动离心式空压机的研发

提出了一种以水润滑动静压轴承为支撑、永磁同步电机驱动的高速离心式空气压缩机解决方案.在结构上实现了水润滑与永磁电机的融合，满足了燃料电池系统对空压机无油、高效的要求.在对空压机转子系统进行动力学优化的基础上，研究了不同结构浅腔动静压轴承的水膜稳定性，进而研发出空压机原理样机，空压机样机在6×104r/min时可提供350kg/h，压力比为1.52的压缩空气，整体效率接近80%，实现了高速稳定运行，验证了设计方案的可行性. 

Development of the Motorized Centrifugal Air Compressor Using Water-Lubricated Bearings for Fuel Cells

A design programming was presented for a high speed centrifugal air compressor supported with water lubricated bearings and driven by permanent magnet synchronous motor (PMSM). In order to satisfy the oil-free and high efficiency requirements of the fuel cell system, the compressor was designed structurally combining water lubricated bearing with PMSM. A dynamic optimization was first conducted on the compressor rotor, then the stability performances of different kinds of water lubricated sallow multi-pocket bearing were investigated. Finally, a prototype of the compressor was developed and tested. The results show that the air compressor prototype can proride compressed air with 350kg/h, aressure ratio at 6×10⁴ r/min. Steady operations at high rotating speed were obtained, and the feasibility of the design was verified.