基于流固耦合的压缩机舌簧排气阀数值研究  

Numerical study of compressor discharge reed valve based on fluid-structure interaction

作　　者：罗凡博 江斌 张弘强 卢佳乐 张锐 Luo Fanbo;Jiang Bin;Zhang Hongqiang;Lu Jiale;Zhang Rui(School of Automotive and Transportation Engineering,Hefei University of Technology,Hefei 230009,China;Hefei Anxin Reed Valve Precision Manufacturing Co.Ltd.,Hefei 230061,China)

机构地区：[1]合肥工业大学汽车与交通工程学院,合肥230009 [2]合肥安信瑞德精密制造有限公司,合肥230061

出　　处：《低温与超导》2022年第11期85-92,共8页Cryogenics and Superconductivity

基　　金：合肥工业大学产学研校企合作项目(W2020JSKF0097)资助。

摘　　要：针对带升程限制器的变转速活塞式压缩机排气阀,利用ANSYS软件流固耦合模块(fluid-structure interaction,FSI)建立了压缩机排气的三维流固耦合模型,得到了排气过程中流体在各个曲轴转角时的压力场、速度场和阀片位移变化曲线。研究表明:气缸内部速度和压力分布不均,阀口处变化程度最大;较小的转速会导致阀片震颤,提高转速后会减小气体波动但会增加压力损失导致阀片延迟开启和关闭,甚至过大的转速会造成排气回流降低压缩机的制冷性能;不同制冷剂对压缩机性能会产生影响。最后,结合对阀片的模态分析得出了该压缩机最佳的运行转速范围,并根据不同制冷剂下阀片的不同状态提出了解决方法。Aiming at the discharge valve of variable speed piston compressor with lift limiter,a 3 D fluid-structure interaction model of compressor discharge was established by using the fluid-structure interaction(FSI)module of ANSYS software.The pressure field,velocity field and valve displacement curve of fluid at each crank angle during the discharge process were obtained.The result shows that the velocity and pressure distribution inside the cylinder are uneven,and the change degree at the valve port is the largest.The smaller rotational speed will cause reed valve to vibrate,and the increase of rotational speed will reduce the gas fluctuation but increase the pressure loss,leading to the delayed opening and closing of reed valve,and even the excessive rotational speed will cause the discharge back flow to reduce the refrigeration performance of the compressor.Different refrigerants will affect the compressor performance.Finally,the optimal operating speed range of the compressor was obtained by modal analysis of reedvalve,and the solutions were proposed according to the different states of reedvalve under different refrigerants.

关 键 词：变转速压缩机 升程限制器 舌簧排气阀 流固耦合 动态特性 

分 类 号：TH457[机械工程—机械制造及自动化]