机械科学与技术2011，Vol.30Issue(12)：2146-2151,2156,7.
大型往复压缩机振动故障分析与消解策略研究
Analysis of Failure Causes and Study of Countermeasures for a Large-scale Reciprocating Compressor Vibration
许增金 1王世杰1
作者信息
- 1. 沈阳工业大学机械工程学院,沈阳110870
- 折叠
摘要
Abstract
The crankshaft of a 6 crank reciprocating compressor frequently cracks and often scuffs because of torsional vibration. Such problems are solved by connecting the interference hot assembling two plate flanges. With the help of ANSYS software, finite the 1^st and 2^nd crank bearing 2^nd and 3^rd shaft by means of element analysis model is set up for pre-and-aft modification of crankshaft. Modal analysis and dynamic response calculation of crankshaft for different modification plans are performed, and the results show that the frequency ratio r between sevenfold rotating speed of initial crankshaft and the first order torsional vibration natural frequency is 1. 016, which makes the initial crankshaft resonates. With the rotating inertia-mass of modified crankshaft enlarged, to 1. 064, and resonance is eliminated. The rotating vibration displacement of initi the frequency ratio r increases al crankshaft at the first crank pin is far bigger than that of the 6^th, which is the main reason of crank bearing scuff. The inertia-mass of initial crankshaft results in additional stress at resonance, which is the main reason of crank cracking.关键词
往复压缩机/故障成因/动态响应分析/轴系扭转共振Key words
reciprocating compressor/failure causes/dynamic analysis of crankshaft/crankshaft torsional vibration分类
通用工业技术引用本文复制引用
许增金,王世杰..大型往复压缩机振动故障分析与消解策略研究[J].机械科学与技术,2011,30(12):2146-2151,2156,7.
