• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

机械工程学报 ›› 2016, Vol. 52 ›› Issue (20): 178-184.doi: 10.3901/JME.2016.20.178

• 交叉与前沿 • 上一篇    下一篇

扫码分享

超高压压缩机填料盘过盈配合过盈量设计方法

雷达1, 李雪红1, 李云1, 任希文2   

  1. 1. 西安交通大学化学工程与技术学院 西安 710049；
    2. 沈阳远大压缩机股份有限公司 沈阳 110027
  • 出版日期:2016-10-20 发布日期:2016-10-20
  • 作者简介:

    雷达，男，1990年出生，博士研究生。主要研究方向为流体机械及多相流传热传质。

    E-mail：sherlock.holmes@stu.xjtu.edu.cn

    李云(通信作者)，女，1968年出生，博士，教授，博士研究生导师。主要研究方向为化工流程机械设计与节能、危化品储运智能管理及应急救援技术、大规模粉煤低温热解装备设计。

    E-mail：yunli@mail.xjtu.edu.cn

Design Method of Interference Fit in Packing Cups
of Hypercompressors

LEI Da1, LI Xuehong1, LI Yun1, REN Xiwen2   

  1. 1. School of Chemical Engineering and Technology， Xi’an Jiaotong University， Xi’an 710049
    , 2. Shenyang Yuanda Compressor Co.， Ltd.， Shenyang 110027
  • Online:2016-10-20 Published:2016-10-20

PDF

215

摘要：

超高压压缩机是生产低密度聚乙烯的核心装置，其设计和制造还有待研究和完善。填料盘是其关键部件之一，填料盘过盈配合的过盈量是一个重要设计参数，国内还未见成熟的设计方法。为了研究如何确定过盈量，使内盘三向应力始终压缩和填料盘整体等效应力最小，建立填料盘理论模型，对填料盘的过盈量进行优化分析。理论分析可知填料盘内盘最大周向应力在排气压力下为压缩应力时，内盘即获得三向压缩应力状态;随着过盈量的增大，内盘的最大周向应力逐渐变小并由拉伸应力转变为压缩应力，而整体最大等效应力先减小再增大。对填料盘实际结构的有限元分析也得到相同的结论。理论分析推导得到排气压力下最大周向应力为零时的过盈量以及整体最大等效应力最小时的过盈量。分析认为过盈量的设计应当取和中较大的值就能满足内盘三向压缩应力状态以及整体最大等效应力最小的要求，填料盘的设计可以参考该结论。

关键词: 过盈量, 填料盘, 有限元分析, 超高压压缩机

Abstract:

A hypercompressor is essential part of low density polyethylene production. Designing and manufacturing hypercompressors requires further research and improvement. Packing cups are crucial components in hypercompressors. Design of interference fit of packing cups is of great importance and lacks a complete method in China. Interference fit is designed with two purpose which includes to obtain compressive state for the inner cup and to minimize the equivalent stress of overall packing cup. A simplified model of a packing cup is built for theoretical analysis to determine interference fit. In theoretical analysis, the inner cup can be in compressive state when its maximum circumferential stress becomes compressive; The maximum circumferential stress of the inner cup decreases and turns compressive stress from tensile stress as the interference fit increases, while the overall maximum equivalent stress goes up after decline with the rise of interference fit. Finite element analysis on a packing cup without structure simplification has the same conclusion with the theoretical analysis. In theoretical analysis, interference fit, that makes the maximum circumferential stress of inner cup turn compression, and, that obtains the minimum of overall maximum equivalent stress, are derived. The conclusion is that the design of interference fit should be the larger one between and. This conclusion can be a reference for designing packing cups for hypercompressors.

Key words: finite element analysis, interference fit, packing cup, hypercompressor

版权所有 © 2019 《机械工程学报》编辑部 | 京ICP备05055788号-30