氦气涡旋压缩机喷油冷却管振动分析

作为吉福特-麦克马洪(G-M)低温制冷机的核心动力部件,氦气涡旋压缩机的稳定运行对整机性能的影响至关重要。文章针对压缩机喷油冷却管路的振动现象,采用数值计算和实验方法,研究喷油管流体压力的脉动规律。仿真计算结果表明,相较于2.00 mm管径喷油管,5.00 mm管径喷油管内部流体压力的平均不均匀度降低了23.876%;管路振动实验测试数据表明,相较于2.00 mm管径喷油管,5.00 mm管径喷油管的振动位移值平均降幅达63.47%。文章研究结果表明,适量增大喷油管直径可有效减小管内流体的压力脉动以及管路的振动,从而提升压缩机的运行稳定性。

As the core power component of Gifford-McMahon(G-M) cryocoolers, the stable operation of the helium scroll compressor is crucial to the overall performance of the system. For the vibration phenomenon of the oil injection cooling pipeline of the compressor, this paper uses numerical calculation and experimental methods to study the fluid pressure pulsation of the oil injection pipe. Simulation calculation results show that the average unevenness of the internal fluid pressure of the 5.00 mm oil injection pipe is lower than that of the 2.00 mm pipe, which is reduced by 23.876%. Pipeline vibration test data indicate that the 5.00 mm oil injection pipe exhibits an average reduction of 63.47% in vibration displacement compared to the 2.00 mm pipe. An appropriate increase in the oil injection pipe diameter can effectively reduce the fluid pressure pulsation inside the pipe and the pipeline vibration, and improve the operation stability of the compressor.