高速离心式压缩机轴向力自平衡装置研究  

Research of Axial Force Self-Balancing Device in a High-Speed Centrifugal Compressor

作　　者：张鹏飞[1] 段文龙[1] 王志恒[1] 席光[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《工程热物理学报》2015年第11期2366-2370,共5页Journal of Engineering Thermophysics

基　　金：高等学校博士学科点专项基金资助项目(No.200110201110061)

摘　　要：为解决电磁轴承在高速压缩机中遇到高负载、高发热等问题,设计研究了一种轴向力自平衡装置,以减小电磁轴承的负载,减少发热量。通过数值模拟方法,从性能方面对本设计进行了研究。研究结果表明,自平衡装置在各工况点都可以较明显的减小压缩机整机的轴向力,并且可以在一定的工况范围内实现自平衡。在间隙变大时,压缩机级的等熵效率仅下降1%,在可以接受的范围,而总压比和轴功率基本保持不变;在间隙变小时,压缩机级的等熵效率上升2%,是期望见到的,总压比和轴功率变化很小。由此,证明本轴向力自平衡装置的设计足合理的、可行的,对减小电磁轴承的轴向负载有重要意义。To solve the high load,serious heating and other problems of electromagnetic bearings in high-speed compressor,a device was designed to study the self-balancing axial force to reduce the load and the heat of electromagnetic bearings.Based on numerical simulation,this design is verified from the performance aspect.Verification results show that the self-balancing device at each operating point can obviously reduce the total axial force of the compressor,and can achieve self-balancing within a certain range of operating conditions.When the gap becomes large,the isentropic efficiency of the compressor stage decreases by only 1%,in the acceptable range,while the shaft power and the total pressure ratio substantially unchanged.When the gap becomes small,the isentropic efficiency of the compressor stage rises 2% as it is expected,and the total pressure ratio and shaft power changes little.Thus,it proves that the design of axial force self-balancing device is reasonable and feasible to reduce the axial load of magnetic bearings.

关 键 词：高速离心式压缩机 轴向力自平衡 电磁轴承 

分 类 号：TK121[动力工程及工程热物理—工程热物理]