流体机械

2008, No.437(11) 11-16

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往复式压缩机环状阀工作过程冲击应力分析
Analysis of Impact Load Stresses on the Working Process of the Ring Valve in Reciprocating Compressor

卢朝霞;王玉鹏;张增营;潘树林;梁景;孙建华;
LU Zhao-xia,WANG Yu-peng,ZHANG Zeng-ying,PAN Shu-lin,LIANG Jing,SUN Jian-hua(Guangxi University,Nanning 530004,China)

摘要(Abstract):

根据往复式压缩机;环状阀的结构和运动特点,应用大型有限元显式动力分析软件ANSYS/LS-DYNA分析了往复式压缩机环状阀阀片与阀座及升程限制器正碰撞与倾侧碰撞产生的冲击应力。结果表明:阀片倾侧碰撞产生的应力大于正碰撞产生的应力;倾侧碰撞产生的冲击应力正是阀片失效的主要原因。同时,阀片冲击应力随倾侧运动幅度的增大而增大;在相同碰撞速度及倾侧运动幅度的情况下,阀片冲击应力随阀片厚度的增大而增大。这为压缩机环状阀的结构改造和优化设计提供了参考和依据。
In view of the structure and locomotion character of the ring valve of compressor,the impact load stresses of the straight impact and the leaning impact of the valve plate against the valve seat and the valve guard on the working process of the ring valve in the reciprocating compressor are analyzed by means of ANSYS/LS-DYNA,which is a large-scale explicit dynamics finite element analysis software.The results show that the stress of the leaning impact is higher than that of the straight impact.The stress of the leaning impact is the main reason of the failure of the valve plate.The higher the amplitude of the leaning motion is,the higher the impact load stress of the valve plate is.And the thicker the valve plate is,the higher the impact load stress is at the same impact velocity and amplitude of the leaning motion.It gives the basis for the compressor ring valve structure modification and optimization design.

关键词(KeyWords): 往复式压缩机;环状阀;碰撞;冲击应力;有限元分析;ANSYS/LS-DYNA
reciprocating compressor;ring valve;impaction;impact load stresses;finite element analysis;ANSYS/LS-DYNA

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作者(Author): 卢朝霞;王玉鹏;张增营;潘树林;梁景;孙建华;
LU Zhao-xia,WANG Yu-peng,ZHANG Zeng-ying,PAN Shu-lin,LIANG Jing,SUN Jian-hua(Guangxi University,Nanning 530004,China)

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