螺杆压缩机转子过盈装配应力对机组运行寿命的影响分析

发布时间：2018-06-03 13:38

本文选题：螺杆压缩机 + ABAQUS　；参考：《化工设备与管道》2016年06期

【摘要】：螺杆转子是螺杆压缩机的核心部件。转子直径大于500 mm的转子,光轴与螺旋齿部分采用热套工艺进行装配,若装配不合理,将会对螺杆机组的整体寿命产生不良影响。由于螺杆压缩机工作中,径向受力上阴转子比阳转子大,且阴转子齿面较薄,因此文章针对更易发生疲劳损坏的阴转子进行分析研究;由于齿面结构不规则,无法采用传统的计算公式,因此借鉴用有限元软件ABAQUS/CAE对某型号阴转子进行的有限元分析结果,探讨分析过盈装配应力对机组运行寿命的影响,分析表明阴转子空心齿内的最大应力达到226 MPa,同时齿面最薄处的应力达150 MPa;在保证正常装配的情况下,将φ250 mm圆柱面连接处的过盈量减小,空心齿内的最大应力减小为198 MPa,同时齿面最薄处的应力减小为135 MPa,提高了抗疲劳强度,给实际加工生产或者检维修工作,选取适当的装配过盈量提供了参考性意见。
[Abstract]:Screw rotor is the core component of screw compressor. When the diameter of rotor is more than 500 mm, the optical shaft and spiral tooth are assembled by hot sleeve technology. If the assembly is not reasonable, the whole life of screw unit will be adversely affected. In the work of screw compressor, the upper negative rotor with radial force is larger than the positive rotor, and the tooth surface of the yin rotor is thinner, so the paper analyzes and studies the overcast rotor which is more prone to fatigue damage, because the tooth surface structure is irregular, The traditional calculation formula can not be adopted, so the influence of interference assembly stress on the operation life of a certain type of rotor is analyzed by using the finite element analysis result of finite element software ABAQUS/CAE. The analysis shows that the maximum stress in hollow teeth of the rotor is 226 MPA and the stress at the thinnest part of the tooth surface is 150 MPA. Under the condition of normal assembly, the interference at the junction of 蠁 250mm cylindrical surface is reduced. The maximum stress in the hollow tooth is reduced to 198 MPA, and the stress at the thinnest part of the tooth surface is reduced to 135 MPA, which improves the fatigue strength and provides a reference for the actual processing, production, inspection and maintenance, and the selection of appropriate assembly interference.
【作者单位】：陕西延长中煤榆林能源化工有限公司;
【分类号】：TH45

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