氦气体轴承透平膨胀机研制  

Evelopment of Helium Gas Bearing Turbo Expander

作　　者：祝勇仁[1] 张炜[1] 韩澎 

机构地区：[1]浙江机电职业技术学院,浙江杭州310053 [2]杭州新亚低温科技有限公司,浙江杭州310053

出　　处：《机械研究与应用》2014年第5期124-126,共3页Mechanical Research & Application

基　　金：浙江省科技厅公益技术研究工业项目(编号:2014C31157)

摘　　要：根据氦制冷系统的要求设计氦透平膨胀机,按透平膨胀机的整体热力性能及机械性能进行多目标优化方法设计,对氦透平膨胀机的结构形式、热力性能进行优化设计。对传统的Riccati传递矩阵法改进推导进行临界转速求解,提出一种切向进气的静压气体轴承结构形式,通过设置回气孔和轴向排气孔,提高主轴的失稳转速。通过现场氦气试车,氦透平膨胀机运转平稳,热力性能优异,表现出良好的整机性能,完全达到了氦制冷系统的设计要求。According to the requirements of helium refrigeration system, helium turbo expander was designed. A multi-objec-tive optimization method was presented to design the helium turbo expander in consideration of the overall thermal performanceand mechanical performance of turbine expander. The traditional Riccati transfer matrix method for critical speed was derived.It also proposed a tangential inlet of the static pressure gas bearing structure with the blowhole and axial back vent, which im-proved the spindle speed of instability. Through the helium test on the spot, the helium turbo expander operates smoothly withexcellent thermal and overall performance. It fully meets the design requirements of the helium refrigeration system.

关 键 词：氦透平膨胀机 热力性能 机械性能 临界转速 气体轴承 

分 类 号：TB653[一般工业技术—制冷工程]