Vibration Analysis Case Studies - Ahmed Nagib€¦ · Vibration Analysis Case Studies By Eng/ Akram...
Transcript of Vibration Analysis Case Studies - Ahmed Nagib€¦ · Vibration Analysis Case Studies By Eng/ Akram...
Vibration Analysis Case Studies By Eng/ Akram Abdelhamid
Case Study - 1 Cooling Tower Fan
!Machine(Data:(
Power:!110!kW!Current: 164!A!
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Shaft Speed Bearing type
Motor 1490 6316 C3 (SKF) 6317 C3 (SKF)
G.B Input 1490 32313-B (FAG) G.B
Intermediate 472.44 32315 BJ2/QCL7C (SKF) 32315-A (FAG)
G.B Output 123.24
NJ 222 ECJ/C3 (SKF) SL 182932 (FAG) = NCF 2932 CV (SKF) 81220-72/W1114
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Machine(Layout(
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Initial reading
Final reading
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M/C$ Br.No$ A$ V$ H$ G1H$
Motor$ M1# 1.8$ 1.6$ 2.2$ 1.9$
All!measurements!in!mm/s! ! ! !
M/C$ Br.No$ A$ V$ H$ G1H$
Motor$ M1# 1.7$ 1.4$ 1.9$ 2.25$
All!measurements!in!mm/s! ! ! !
Motor G.Box
Initial Reading on Gearbox!
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!!!!!" !UREA!COOLING!TOWER!FAN388K001!C!"G1
Analyze!ACorr(Wf)!!!!!!!22"Mar"12!!07:44:18!!
!!RMS!=!!.0954!!!!LOAD!=!!!!.0!!!!!RPM!=!60.!(1.00!Hz)!!
!!PK(+)!=!.7282!!!!!!!PK(" )!=!.3719!!!!!!!CRESTF=!7.63!!!!!!
0 100 200 300 400 500 600 700
"1.0
"0.5
0!
0.5
1.0
Time!in!mSecs
Correlation!Factor
!!!!!" !UREA!COOLING!TOWER!FAN
388K001!C!"G1
Analyze!ACorr(Wf)!!!!!
!!22"Mar"12!!07:56:20!!
!!RMS!=!!.0947!!
!!LOAD!=!!!!.0!!!
!!RPM!=!1450.!(24.16!Hz)!!
!!PK(+)!=!.7482!!!!!
!!PK(" )!=!.3773!!!!!
!!CRESTF=!7.90!!!!!!
0 30 60 90 120 150 180
"1.0
"0.5
0!
0.5
1.0
Time!in!mSecs
Correlation!Factor
Final Reading after change broken gear!
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!!!!!" !UREA!COOLING!TOWER!FAN388K001!C!"G1H
Analyze!ACorr(Wf)!!!!!!!23"Oct"13!!10:09:07!!
!!RMS!=!!.1897!!!!LOAD!=!!!!.0!!!!!RPM!=!1423.!(23.72!Hz)!!
!!PK(+)!=!.5688!!!!!!!PK(" )!=!.4347!!!!!!!CRESTF=!3.00!!!!!!
0 30 60 90 120 150 180
"1.0
"0.5
0!
0.5
1.0
Time!in!mSecs
Correlation!Factor
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Comparison between initial spectrum and after change broken gear
Initial reading.
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After Repair
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Comparison between initial Time wave form and after change broken gear
Initial reading.
After Repair
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!!!!!" !UREA!COOLING!TOWER!FAN388K001!C!"G1
Analyze!ACorr(Wf)!!!!!!!22"Mar"12!!07:44:18!!
!!RMS!=!!.0954!!!!LOAD!=!!!!.0!!!!!RPM!=!60.!(1.00!Hz)!!
!!PK(+)!=!.7282!!!!!!!PK(" )!=!.3719!!!!!!!CRESTF=!7.63!!!!!!
0 100 200 300 400 500 600 700
"1.0
"0.5
0!
0.5
1.0
Time!in!mSecs
Correlation!Factor
!!!!!" !UREA!COOLING!TOWER!FAN388K001!C!"G1H
Analyze!ACorr(Wf)!!!!!!!23"Oct"13!!10:09:07!!
!!RMS!=!!.1897!!!!LOAD!=!!!!.0!!!!!RPM!=!1423.!(23.72!Hz)!!
!!PK(+)!=!.5688!!!!!!!PK(" )!=!.4347!!!!!!!CRESTF=!3.00!!!!!!
0 30 60 90 120 150 180
"1.0
"0.5
0!
0.5
1.0
Time!in!mSecs
Correlation!Factor
Machine photos:
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Case Study – 1 Diagnosis
Gearbox teeth Defect
Case Study - 2
Sprayer Air Fan !
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((((((((Machine(Data:(Speed: 2990!rpm!Power 1100!kW!Design!volume!flow!rate:45!Km3/h!Current: 85!A!Flap Opening 100!%!Motor Br. No 6022C3!(SKF)!Motor Br. No NU 1022 M!(SKF)!
Initial reading
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Final reading
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M/C$ Br.No$ A$ V$ H$
Motor$ M1# 2.7$ 7.6$ 4$
M/C$ Br.No$ A$ V$ H$
Motor$ M1# 0.98$ 1.4$ 0.7$
BASE#FRAM#
Motor#Blower#
M#B1#B2#
Initial Reading at 28-9-2014
Final Reading After Change Motor Bearings at 2-10-2015
!!!!!" !DEDUSTING!FAN335K002!!!"M1A
Analyze!Spectrum!!!!!!!!02"Oct"14!!15:04:23!!
!!RMS!=!!.9801!!!!LOAD!=!!!!.0!!!!!RPM!=!2993.!(49.88!Hz)!!
0 1000 2000 3000 4000 5000
0!
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
Frequency!in!Hz
RMS!Velocity!in!mm/Sec
23.26
47.5049.88
224.79
226.42
229.41
479.12
499.08
501.47
2395.0
2495.1
2595.2
Bearings#Defect#Frequency#
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Case Study – 2 Diagnosis
Motor Bearing defect
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Case Study - 3 !
Boiler Combustion Air Fan
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Machine(Data:(Speed: 1494!rpm!Power 560!kW!Current: 50.9!A!Flap Opening 36.5!%!Br.1 No 22226!EC3(SKF)!Br.2 No 22226!EC3(SKF)!
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Machine(Layout(
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Initial reading
M/C$ Br.No$ A$ V$ H$
Motor$ M1# 2.9$ 2.3$ 3.6$
Fan$B1# 1.8$ 5$ 1.4$
B2# 4$ 2.5$ 3.5$!
Final reading
M/C$ Br.No$ A$ V$ H$
Motor$ M1# 1.1$ 2$ 1.4$
Fan$B1# 1.9$ 1.4$ 1.5$
B2# 1.7$ 1.2$ 1.4$All!measurements!in!mm/s! ! !
Motor Fan
M1 B1 B2
Initial Reading at 7-7-2014
At 23-8-2014 After adjust alignment
Comparison between initial spectrum and after Alignment correction Initial reading.
After Alignment
At 24-8-2014
After washed blower blades.
At 24-8-2014
After balance blower blades.
Spectrum comparison before and after balancing process
After washed blower blades.
After balance blower blades.
Balance Sheet
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Case 3 Diagnosis
Misalignment and unbalance for !