sleeve bearing diagnostics r1 - vibrationvibration.org/presentation/may 2008/sleeve bearing...
TRANSCRIPT
![Page 1: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/1.jpg)
Charles Phelps
Field Engineer
GE Energy
312 Thompson Ave
Lehigh Acres, FL 33972
Sleeve Bearing Diagnostics UsingProximity Probes
![Page 2: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/2.jpg)
Basic Concepts of Rotor Dynamics
![Page 3: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/3.jpg)
RELATIVE PHASE
Relative Phase
ONE CYCLESignal A (Y)
Signal B (X)
Am
plit
ud
e
Time
ONE CYCLE
1. Two Signals
2. Same Frequency
3. Same Units
4. Either Signal May Be Reference
5. Relative Phase is0 to 180 degreesLeading or Lagging
![Page 4: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/4.jpg)
0°
0°
-V
-V
Once Per Turn Reference Pulse
ONE REVOLUTION
ONE REVOLUTION
![Page 5: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/5.jpg)
Shaft Balancing
Shaft Crack Detection
Shaft / Structural Resonance Detection
Shaft Mode Shape
Direction of Precession
Location of Fluid-Induced Instability Source
![Page 6: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/6.jpg)
0.2 2.0
TimeAmplitude Time
Volts/div.
ms/ div.
Timebase Vibration Characteristics
1. Vibration Amplitude2. Vibration Frequency3. Phase4. rpm5. Direction of Precession6. Signal Shape 7. Gap
(from proximity probe)
Y
X
X to Y (counterclockwise)
![Page 7: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/7.jpg)
Y
X
Y
X
Direction of Precession
Given X to Y Precession (ccw) and (ccw) Rotation: Precession = Forward
![Page 8: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/8.jpg)
1. Vibration Amplitude (X & Y)2. Absolute Phase (X & Y)3. Relative Phase4. Relative Frequency (X & Y)
vs Running SpeedX vs Y
5. Direction of Precession
6. Shape
Amplitude
Orbit Vibration Characteristics
YX
X = Y =5.6 mils pp 5.4 mils pp
![Page 9: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/9.jpg)
Amplitude
Orbit Vibration Characteristics
Given X to Y (ccw) Rotation:
Forward Precession
1. Vibration Amplitude (X & Y)2. Absolute Phase (X & Y)3. Relative Phase4. Relative Frequency (X & Y)
vs Running SpeedX vs Y
5. Direction of Precession
6. Shape
![Page 10: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/10.jpg)
A B C D E F
Shaft Deflection Shape
Different Bearings, Same Speed with Keyphasor® Marker.
![Page 11: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/11.jpg)
**
***
**
6.0
4.0
2.0
0.0-2.0 0.0 2.0
07:26:407:26:1
07:24:5
07:23:307:19:2
07:17:1
07:15:0
TRAIN: 115 MW TG 45 deg Ref: -9.76 voltsPoint ID: BRG #1 VERT 315 deg Ref: -9.28 voltsPoint ID: BRG #1 HORIZ Var: PROBE GAP TRANSIENT FILE30 SEP 88 07:02:52 to 30 SEP 88 07:42:15
AVERAGE SHAFT CENTERLINE POSITION
AMPLITUDE 0.20 mils/div X to Y (CCW) ROTATION
UP
Average Shaft Centerline Position
![Page 12: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/12.jpg)
0.5X 1X 2X
Oscilloscope Spectrum Analyzer
1/2X Vibration
![Page 13: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/13.jpg)
Vibration Signal
TIME
COMPLEX WAVEFORM
1X3X
6X8X
![Page 14: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/14.jpg)
+ + + + +
+ + + + +
+ + + + +
+ + + + +
+ + + + +
Y
X
-1X
0 1X
2.5
2.0
0
2xB
2xA
A
A
B
B
A
B
1.5
1.0
0.5
UP POINT: Bearing 1 Vibration vertical
POINT: Bearing 1 Vibration horizontal
2.0 mil/div X to Y (CCW) Rotation 5.00 ms/div 4935 rpm
Full Spectrum
Am
plit
ud
e:
(mil
pp
/div
)A
B
B
A
A
B
ReverseVibration
ForwardVibration
1.0 mil/div X to Y (CCW) RotationFrequency(Orders)
![Page 15: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/15.jpg)
. .. . . .. . .
. .. . . .. . .
. .. . . .. . .
. .. . . .. . .
. .. . . .. . .
. .. . . .. . .
. .. . . .. . .
. .. . . .. . .
. .. . . .. . .
40
30
20
10
0-4000 -2000 0 2000 4000
Reverse Vibration Components
Forward Vibration Components
FREQUENCY: 200 cpm/div X to Y (CCW) Rotation
POINT: PT BRG 4 VERT 0°POINT: PT BRG 4 VERT 90°14 SEP 93 13:17:44 4890 rpm
POINT: Dual Vibr OB VERT
POINT: Dual Vibr OB HORIZ
10 mils/div DIRECT
X to Y (CCW) Rotation
5.00 ms / div 4890 rpm
Full Spectrum
Up
1X
AM
PL
ITU
DE
: 1
0.0
mils
/div
![Page 16: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/16.jpg)
Full Waterfall Plot
![Page 17: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/17.jpg)
HOW TO MAKE PHASE MEASUREMENTS
![Page 18: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/18.jpg)
RELATIVE PHASE
Relative Phase
ONE CYCLESignal A (Y)
Signal B (X)
Am
plit
ud
e
Time
ONE CYCLE
1. Two Signals
2. Same Frequency
3. Same Units
4. Either Signal May Be Reference
5. Relative Phase is0 to 180 degreesLeading or Lagging
![Page 19: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/19.jpg)
Deflection Shape
A
B
![Page 20: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/20.jpg)
0°
0°
-V
-V
Once Per Turn Reference Pulse
ONE REVOLUTION
ONE REVOLUTION
![Page 21: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/21.jpg)
0° 360°
Absolute Phase Measurements
Timing (in degrees) between two (2) points on a vibration signal, the Keyphasor® pulse and positive peak in vibration.
Vibration Signal
Time
Phase Lag
Keyphasor ®
SignalDegrees of
Rotation
NOTE: Frequency must be the same or harmonically related.
![Page 22: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/22.jpg)
HOW TO INTERPRET STEADY STATE DATA FORMATS
![Page 23: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/23.jpg)
0.2 2.0
Timebase Vibration Characteristics
TimeAmplitude Time
1. Vibration Amplitude2. Vibration Frequency3. Phase4. rpm5. Direction of Precession6. Signal Shape 7. Gap
(from proximity probe)
Volts/div.
ms/ div.
![Page 24: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/24.jpg)
0.2 2.0
TimeAmplitude Time
Volts/div.
ms/ div.
Timebase Vibration Characteristics
1. Vibration Amplitude2. Vibration Frequency3. Phase4. rpm5. Direction of Precession6. Signal Shape 7. Gap
(from proximity probe)
Y
X
X to Y (counterclockwise)
![Page 25: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/25.jpg)
Y
X
Y
X
Direction of Precession
Given X to Y Precession (ccw) and (ccw) Rotation: Precession = Forward
![Page 26: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/26.jpg)
0.2 2.0
TimeAmplitude Time
Volts/div.
ms/ div.
Timebase Vibration Characteristics
1. Vibration Amplitude2. Vibration Frequency3. Phase4. rpm5. Direction of Precession6. Signal Shape7. Gap
(from proximity probe)
Sinusoidal
![Page 27: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/27.jpg)
Relative Vibration Frequency
A B
1/2X 2X
![Page 28: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/28.jpg)
Amplitude
Orbit Vibration Characteristics
1. Vibration Amplitude (X & Y)2. Absolute Phase (X & Y)3. Relative Phase4. Relative Frequency (X & Y)
vs Running SpeedX vs Y
5. Direction of Precession
6. Shape
![Page 29: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/29.jpg)
1. Vibration Amplitude (X & Y)2. Absolute Phase (X & Y)3. Relative Phase4. Relative Frequency (X & Y)
vs Running SpeedX vs Y
5. Direction of Precession
6. Shape
Amplitude
Orbit Vibration Characteristics
YX
X = Y =5.6 mils pp 5.4 mils pp
![Page 30: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/30.jpg)
Amplitude
Orbit Vibration Characteristics
X = Y =180° 270°
1. Vibration Amplitude (X & Y)2. Absolute Phase (X & Y)3. Relative Phase4. Relative Frequency (X & Y)
vs Running SpeedX vs Y
5. Direction of Precession
6. Shape
![Page 31: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/31.jpg)
Amplitude
Orbit Vibration Characteristics
X leads Y by 90°
1. Vibration Amplitude (X & Y)2. Absolute Phase (X & Y)3. Relative Phase4. Relative Frequency (X & Y)
vs Running SpeedX vs Y
5. Direction of Precession
6. Shape
![Page 32: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/32.jpg)
Amplitude
Orbit Vibration Characteristics
1X
1. Vibration Amplitude (X & Y)2. Absolute Phase (X & Y)3. Relative Phase4. Relative Frequency (X & Y)
vs Running SpeedX vs Y
5. Direction of Precession
6. Shape
![Page 33: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/33.jpg)
Amplitude
Orbit Vibration Characteristics
Given X to Y (ccw) Rotation:
Forward Precession
1. Vibration Amplitude (X & Y)2. Absolute Phase (X & Y)3. Relative Phase4. Relative Frequency (X & Y)
vs Running SpeedX vs Y
5. Direction of Precession
6. Shape
![Page 34: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/34.jpg)
Amplitude
Orbit Vibration Characteristics
Circular
1. Vibration Amplitude (X & Y)2. Absolute Phase (X & Y)3. Relative Phase4. Relative Frequency (X & Y)
vs Running SpeedX vs Y
5. Direction of Precession
6. Shape
![Page 35: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/35.jpg)
A B C D E F
Shaft Deflection Shape
Different Bearings, Same Speed with Keyphasor® Marker.
![Page 36: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/36.jpg)
Relative Phase
X leads Y by 10° - 15°
![Page 37: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/37.jpg)
Relative Phase
X leads Y by 170° - 175°
![Page 38: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/38.jpg)
Vibration Frequency vsRotative Speed
X = 1X, Y = 2X
![Page 39: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/39.jpg)
180° OF ORBITING360° OF ROTATION
Frequency Ratio Using Orbits
120° OF ORBITING360° OF ROTATION
120° ORB 1360° ROT 3
= = X
180° ORB 1360° ROT 2
= = X
240° OF ORBITING360° OF ROTATION
240° ORB 2360° ROT 3
= = X
![Page 40: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/40.jpg)
**
***
**
6.0
4.0
2.0
0.0-2.0 0.0 2.0
07:26:407:26:1
07:24:5
07:23:307:19:2
07:17:1
07:15:0
TRAIN: 115 MW TG 45 deg Ref: -9.76 voltsPoint ID: BRG #1 VERT 315 deg Ref: -9.28 voltsPoint ID: BRG #1 HORIZ Var: PROBE GAP TRANSIENT FILE30 SEP 88 07:02:52 to 30 SEP 88 07:42:15
AVERAGE SHAFT CENTERLINE POSITION
AMPLITUDE 0.20 mils/div X to Y (CCW) ROTATION
UP
Average Shaft Centerline Position
![Page 41: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/41.jpg)
0.5X 1X 2X
Oscilloscope Spectrum Analyzer
1/2X Vibration
![Page 42: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/42.jpg)
Vibration Signal
TIME
COMPLEX WAVEFORM
1X3X
6X8X
![Page 43: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/43.jpg)
+ + + + +
+ + + + +
+ + + + +
+ + + + +
+ + + + +
Y
X
-1X
0 1X
2.5
2.0
0
2xB
2xA
A
A
B
B
A
B
1.5
1.0
0.5
UP POINT: Bearing 1 Vibration vertical
POINT: Bearing 1 Vibration horizontal
2.0 mil/div X to Y (CCW) Rotation 5.00 ms/div 4935 rpm
Full Spectrum
Am
plit
ud
e:
(mil
pp
/div
)A
B
B
A
A
B
ReverseVibration
ForwardVibration
1.0 mil/div X to Y (CCW) RotationFrequency(Orders)
![Page 44: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/44.jpg)
. .. . . .. . .
. .. . . .. . .
. .. . . .. . .
. .. . . .. . .
. .. . . .. . .
. .. . . .. . .
. .. . . .. . .
. .. . . .. . .
. .. . . .. . .
40
30
20
10
0-4000 -2000 0 2000 4000
Reverse Vibration Components
Forward Vibration Components
FREQUENCY: 200 cpm/div X to Y (CCW) Rotation
POINT: PT BRG 4 VERT 0°POINT: PT BRG 4 VERT 90°14 SEP 93 13:17:44 4890 rpm
POINT: Dual Vibr OB VERT
POINT: Dual Vibr OB HORIZ
10 mils/div DIRECT
X to Y (CCW) Rotation
5.00 ms / div 4890 rpm
Full Spectrum
Up
1X
AM
PL
ITU
DE
: 1
0.0
mils
/div
![Page 45: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/45.jpg)
Full Waterfall Plot
![Page 46: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/46.jpg)
HOW TO INTERPRET STARTUP AND SHUTDOWN PLOTS
![Page 47: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/47.jpg)
0 500 1000 1500 2000 2500 3000 3500 4000
4
3
2
1
0
180
240
300
360
60
120
180
240
Slow Roll Phase
Slow Roll Amplitude
1X Bode Plot
Slow Roll Vector
Amplitude: 1.0 mils pp
Phase: 225 Deg. Lag
Slow roll speed range (no dynamic data).rpm
![Page 48: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/48.jpg)
* **
***
**
****
******* * *
0°
90°
180°
270°2205 2250
2280
23702385
2400
2415
2310
2430
2445
24602475
25052685
277529853615300
1845
2145
2610
Uncompensated Polar Plot
4.0 mil pp Full Scale X to Y (CCW) Rotation
Slow Roll Vector
![Page 49: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/49.jpg)
0 500 1000 1500 2000 2500 3000 3500 4000
4
3
2
1
0
180
240
300
360
60
120
180
240
180°
1X Bode Plot
rpm
Uncompensated
Compensated
Plot of High Spot
Angle of Heavy Spot
Uncompensated
Compensated
Balance Resonance
![Page 50: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/50.jpg)
********
* *****
***
0°
90°
180°
270°90°
90°300
20702205 2250
2280
2310 2370
238524052415
2430
24452460
25052610
27753615
1X Compensated Polar Plot
Amplitude and Direction of Response at Balance Resonance
Amplitude and Direction of Response Above Balance Resonance
Direction of Mass Unbalance
4.0 mil pp Full Scale X to Y (CCW) Rotation
![Page 51: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/51.jpg)
180
240
300
360
60
120
180
10
8
6
4
2
00 1000 2000 3000 4000 5000 6000 7000
Vertical and Horizontal 1X Bode Plot
Split Critical
Inboard Horizontal
Inboard Vertical
Structural Resonances
rpm
Split Critical and Structural Resonances
![Page 52: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/52.jpg)
***
**
*
**
*****
***
***
**
0°
90°
180°
270°
22352295
2340
23852400
2415
24452460
247525052610
26852775
27453285
300 20552065 2400
2415
24452475
*
Polar Plot
Balancing EffectMu Before
BalancingMu After
Balancing
4.0 mil pp Full Scale X to Y (CCW) Rotation
![Page 53: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/53.jpg)
0°
90°
180°
270°
Frequently Observed Polar Plot
High Speed
![Page 54: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/54.jpg)
Two Mass Rotor System
Vertical Probe
Vertical Probe
Mass
![Page 55: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/55.jpg)
0° 0°
90°90°
180° 180°
270° 270°
Split Translational Resonance
INBOARD OUTBOARD
High Speed High Speed
![Page 56: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/56.jpg)
0° 0°
90°90°
180° 180°
270° 270°
Translational and Pivotal Resonance
High SpeedHigh Speed
INBOARD OUTBOARD
![Page 57: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/57.jpg)
Typical Flexible Rotor Mode ShapesP1 P2P3P4
Typical Rotor
P3
Cylindrical / Translational Mode P2
Pivot / Conical Mode
P1
P4Third Mode Node Locations are Affected by System Stiffness
![Page 58: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/58.jpg)
**
**
**
**
*
*
*
3.0
2.0
1.0
0.0 -1.0 0.0 1.0
9500
94009200
8700
8000
7600
5500
45001200
500
300
Average Shaft Centerline
Amplitude 0.20 mils / div X to Y (CCW) Rotation
(Not Orbit or Polar Plot)Top
![Page 59: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/59.jpg)
4000
3000
2000
1000
00 1000 2000 3000 4000 5000 6000 7000 8000
1X2X
3X
Half Cascade Plot
Frequency (cpm) Hanning Window
![Page 60: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/60.jpg)
Full Cascade Plot
![Page 61: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/61.jpg)
HOW TO EVALUATE PRELOADS (MISALIGNMENT) AND RADIAL POSITION MEASUREMENTS
![Page 62: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/62.jpg)
Direct MeasurementsVibration and Position
Rotor Speed
Bearing Temperature
Indirect DataProcess Data
Performance Data
![Page 63: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/63.jpg)
Radial Preloads
Gravitational
Fluidic Preloads
Bearing Preloads
Internal MisalignmentParallel and Angular Misalignment
Pipe Strain
Thermal Warping
![Page 64: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/64.jpg)
Axial PreloadsGravity (Vertical Machines)
Fluidic
Process Thrust Loads
Differential Expansion
![Page 65: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/65.jpg)
Orbit Plot Can Show Preloads
(Misalignment)(No Resonance Near Twice Rotative Speed)
Rare Common Rare
![Page 66: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/66.jpg)
Orbit Plot Can Show Preloads
(Misalignment)(Resonance Near Twice Rotative Speed)
Rare Common Rare
![Page 67: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/67.jpg)
Orbit and Position Indicators of Preload
Y X
Y = - 6.8 VdcX = - 7.2 Vdc
Normal Orbit and Position
BEARING
AVERAGE SHAFT CL
CL
Normal steady load downward, such as gravity.
RO
TN
![Page 68: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/68.jpg)
Orbit and Position Indicators of Preload
Y X
Y = - 6.2 VdcX = - 5.8 Vdc
AVERAGE SHAFT CL
BEARING CL
Abnormal Orbit and Position
RO
TN
![Page 69: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/69.jpg)
Gap Voltage Measurement
PROVIDES:Shaft Centerline PositionShaft Attitude AngleEccentricityShaft Trend PlotsAlignment Along Shaft
![Page 70: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/70.jpg)
Radial Position Calculation
Y
X
Y = - 10 VdcX = - 10 Vdc
Vertical Transducer 200 mV/mil
Horizontal Transducer 200 mV/mil
Diametral Clearance 10 mils
Rotor (Not to Scale)
Shaft Centerline
![Page 71: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/71.jpg)
Radial Position Calculation
Y
X
Y = - 9.6 VdcX = - 10.2 Vdc
Vertical Transducer 200 mV/mil
Horizontal Transducer 200 mV/mil
Diametral Clearance 10 mils
Rotor (Not to Scale)
Shaft Centerline
![Page 72: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/72.jpg)
Vertical Transducer200 mv/mil
to Scale)
Radial Position Calculation
Left 1 milUp 2 mils
Y = - 9.6 VdcX = - 10.2 Vdc
Horizontal Transducer 200 mV/mil
Shaft Centerline
Y
X
![Page 73: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/73.jpg)
**
**
**
**
*
*
*
3.0
2.0
1.0
0.0 -1.0 0.0 1.0
9500
94009200
8700
8000
7600
5500
45001200
500
300
Amplitude 0.20 mils / div X to Y (CCW) Rotation
Top
Average Shaft Centerline Position
![Page 74: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/74.jpg)
TurbineGenerator
Shaft Centerline Plot Can Show Misalignment
![Page 75: Sleeve Bearing Diagnostics R1 - Vibrationvibration.org/Presentation/May 2008/Sleeve Bearing Diagnostics R1.pdf · 1.5 1.0 0.5 UP POINT: Bearing 1 Vibration vertical POINT: Bearing](https://reader033.vdocuments.us/reader033/viewer/2022051605/60138f4565d089085f7d7b03/html5/thumbnails/75.jpg)
AXIAL (THRUST) POSITION
DIFFERENTIAL EXPANSION
Thrust Collar
12 Max
12 Max
Axial Position Measurements