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Study on seal improvement and rotor thrust control of centrifugal compressor

Study on seal improvement and rotor thrust control of centrifugal compressor
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摘要 Fluid pressure variations due to process fluctuations or balance drum seal degradation can result in rotor thrust increasing that may jeopardize thrust bearing and compressor’s reliability. Also, the leakage flow through balance drum seal can seriously affect the efficiency of compressor. A method that can improve both the efficiency and reliability of centrifugal compressor is presented. The method focused on rotor thrust control and balance drum seal upgrading. The low leakage feature of Dry-Gas-Seal(DGS), high reliability of labyrinth, and the feasibility of upgrading existing structure are taken into account at the same time to design a combined labyrinth-dry gas seal system on the balancing drum. Based on the combined seal system, a Fault Self-Recovering(FSR) system for the fault of rotor shaft displacement is introduced to assure the safety and reliability of centrifugal compressor. The modern Computational Fluid Dynamics(CFD) is used to validate this envision. The numerical result and relevant information indicate that the combined sealing system could improve the efficiency of the centrifugal compressor by about 4%.
出处 《High Technology Letters》 EI CAS 2007年第3期273-278,共6页 高技术通讯(英文版)
基金 Supported by the National Natural Science Foundation of China (No. 50575016 and No. 50375014)
关键词 centrifugal compressor EFFICIENCY dry gas seal rotor thrust FSR 离心压缩机 效率 干燥气体密封 转子
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