Failure analysis of an MVR (mechanical vapor recompressor) Impeller

被引：37

作者：

Alexander, Keith ^{[1
]}

Donohue, Brian ^{[1
]}

Feese, Troy ^{[2
]}

Vanderlinden, Gordon ^{[3
]}

Kral, Milo ^{[1
]}

机构：

[1] Univ Canterbury, Dept Mech Engn, Christchurch 1, New Zealand

[2] Engn Dynam Inc, San Antonio, TX USA

[3] Opus Int Consultants, Christchurch 8140, New Zealand

来源：

ENGINEERING FAILURE ANALYSIS | 2010年 / 17卷 / 06期

关键词：

Impeller failures; Fatigue; Torsional vibration; Variable speed drive;

D O I：

10.1016/j.engfailanal.2010.03.009

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This article describes the root cause failure analysis of a mechanical vapor recompressor (MVR) impeller used in a dairy processing plant. An impeller blade was thrown during commissioning after approximately 150 h of service. Visual examination of the blade's fracture surface indicated that the crack growth mechanism was fatigue and this was confirmed by scanning electron microscope (SEM) examinations. A detailed investigation was commissioned to determine the source of the oscillatory stresses that must have been present to cause fatigue. A vibration analysis indicated large torsional oscillatory stresses, leading to fatigue, were induced by excitation of the 1st and 2nd torsional vibration modes of the MVR impeller and motor system. The excitation was induced by the control system for the motor variable speed drive (VSD). (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1345 / 1358

页数：14

共 11 条

[1]

*ANSI API, 2005, API 684 STAND PAR RO

[2]

Feese T., 2008, PROC 37 TURBOMACH S, P45, DOI DOI 10.21423/R1VM07

[3]

Feese T., 2009, Proceedings of the 38th Turbomachinery Symposium. Texas AM University, September, Houston, TX, P213

[4] Failure analysis of MVR (machinery vapor recompressor) impeller blade [J].

Kim, TG ;

Lee, HC .

ENGINEERING FAILURE ANALYSIS, 2003, 10 (03) :307-315

[5]

Mitchell J.S., 1993, INTRO MACHINERY ANAL

[6]

Mobley R.K., 1999, PLANT ENGN MAINT SER

[7] Experimental and computational failure analysis of drillstrings [J].

Moradi, S. ;

Ranjbar, K. .

ENGINEERING FAILURE ANALYSIS, 2009, 16 (03) :923-933

[8]

Nestorides E.J., 1958, HDB TORSIONAL VIBRAT

[9]

PETERSON JE, 1997, PETERSONS STRESS CON

[10] TORSIONAL VIBRATION RESULTING FROM ADJUSTABLE-FREQUENCY AC DRIVES [J].

SHEPPARD, DJ .

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, 1988, 24 (05) :812-817

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