Dynamic Characteristics of Crankshafts in Reciprocating Compressor

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Dynamic Characteristics of Crankshafts in Reciprocating Compressor

更新时间：2025-05-01

- Dynamic Characteristics of Crankshafts in Reciprocating Compressor
- Vol. 44, Issue 3, Pages: 100-104(2010)
- 作者机构：
  
  1. 沈阳工业大学机械工程学院,沈阳,110870
  2. 沈阳鼓风机集团有限公司技术中心,沈阳,110869
- 作者简介：
- 基金信息：
- DOI：
  CLC： TH123;TB123
- Online First：10 March 2010，
  
  Published：2010
- 稿件说明：
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Dynamic Characteristics of Crankshafts in Reciprocating Compressor[J]. 2010, 44(3): 100-104.
DOI：

Dynamic Characteristics of Crankshafts in Reciprocating Compressor[J]. 2010, 44(3): 100-104. DOI：

摘要

某6列往复压缩机出现非预期断轴现象

曲轴主轴直径加粗后

机组却出现强烈振动及第1、2列连杆瓦连续烧瓦问题.利用ANSYS软件对曲轴加粗前后的轴系进行了模态和动态响应数值分析

确定了断裂和烧瓦主要是由于扭转共振及其成倍加剧的疲劳破坏所致.为了避开共振区

轴系第2、3列之间由一体结构改为热装2个连接盘进行对接

提高了轴系的转动惯量

调整了压缩机主轴转速与固有频率的比值

使共振消失

彻底解决了故障问题.

Abstract

The unexpected cracking of the crankshafts in a six-crank reciprocating compressor occurred frequently. The severe vibration of the compressor and the scuffing of the 1st and 2nd crank bearings existed after the diameter of the main shaft was magnified. In this paper

modal and dynamic response of the initial crankshaft and the crankshaft with the diameter magnified are analyzed with ANSYS finite element analysis software. The results show that the cracking of crankshafts results from fatigue damage and torsional vibration. Given the diameter of the main shaft magnified

if two plate flanges connecting the 2nd shaft and the 3rd shaft are integrated by hot assembling

the rotating inertia-mass of the modified crankshafts will be enlarged and the frequency ratio r will increase

leading to disappearance of the sympathetic vibration.

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references

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