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Vibration Analysis and Ultrasound PdM
Presented by: Liane HarrisL3 Vibration Analyst & Diagnostician, L2 Ultrasonic Inspector
L1 Infrared Thermographer
2
www.ecs2group.com P: (905) [email protected]
How are you today, Mr. Motor?
Machines are industrial assets that need to be maintained regularly in order to work in the most efficient and most reliable way. Just like going to a dentist for your regular check up. Waiting when you have a toothache before going to the dentist would be more costly, frustrating (scheduling issues) and painful.
www.ecs2group.com P: (905) [email protected]
Machine Doctor (MD): Let’s check how you’re doing, okay.
Ultrasound PdM Vibration Analysis & Diagnostics
Just like people, different technologies should be employed to get a better idea on the health condition of any machinery. This could include ultrasound, vibration analysis, motor testing, oil analysis, and infrared.
www.ecs2group.com P: (905) [email protected]
Qué es Ultrasound PdM?
A technique that uses high frequency detectors to detect the high frequency signals that a friction energy produces as the rolling elements rotate inside a housing or raceways.
www.ecs2group.com P: (905) [email protected]
Ultrasonic PdM
Different brand of detectors, different models, same purpose. A trained inspector will know what to do.
www.ecs2group.com P: (905) [email protected]
Vibration Analysis
A technique used to understand the machine’s response to internal or external stimulus or force applied to it. Vibration analysis identifies the source of stimulus that makes the machine behave accordingly.
www.ecs2group.com P: (905) [email protected]
Vibration Analysis
Different analyzers with the same capabilities, sensors, and settings will give similar spectrum on the same location point of the same machine in the hands of a trained inspector.
www.ecs2group.com P: (905) [email protected]
Information
From Ultrasound
- Change in the level of Ultrasonic Energy since last inspection
- Comparison of Ultrasonic Energy level between similar machines operating at the same conditions.
- Sound quality (Subjective)
Common Uses of Ultrasound PdM
- Lubrication of bearings
- Condition Monitoring of rotating equipments
www.ecs2group.com P: (905) [email protected]
InformationFrom Vibration Analysis & Diagnostics
- Forcing frequencies relating to specific machine problem
- Diagnostics
- Severity of problem
- Condition based monitoring
Machine health conditions identified includes:
Rolling Element Bearing Problems
Journal Bearing Problems
Misalignment
Looseness
Resonance
Imbalance
Electrical Problems on AC and DC Motors
Gear Problems
Cavitations
Belt Drive Problems
www.ecs2group.com P: (905) [email protected]
Ultrasound Caution
1. Ultrasonic detector detects ultrasonic signal – does not differentiate source. Signal can be from a pump cavitation, bearing problem, under/over lubrication, etc.
2. Highly sensitive to changes in operating conditions, i.e., speed, load, flow, temperature, etc.
3. Proper and consistent technique and location spot is very important.
www.ecs2group.com P: (905) [email protected]
Vibration Caution
1. Correct machine information entered i.e., type of machine, rpm, teeth count, coupling, etc.
2. Proper sensor location and orientation.
3. Process changes can affect reading.
www.ecs2group.com P: (905) [email protected]
Cooling Water Pump
4/22/08 8/27/08 10/09/2008
M-Free 12 12 9
M-Drive 15 9 13
P-Drive End 54 35 32
P-Free End 61 54 36
Vibration Slight M-FE Slight M-FE Slight M-DE
Bearing and M-DE
www.ecs2group.com P: (905) [email protected]
Cooling Water PumpP-002
0
10
20
30
40
50
60
70
4/22/08 8/27/08 10/09/2008
Date
dB
M-Free
M-Drive
P-Drive End
P-Free End
ultrasound
www.ecs2group.com P: (905) [email protected]
Cooling Tower Motor Free End M-Free
0
2
4
6
8
10
12
14
4/22/08 8/27/08 10/09/2008
M-Free
Overall vibration readings may give some information but will not be enough for machine diagnostics.
www.ecs2group.com P: (905) [email protected]
Cooling Tower Motor Drive EndM-Drive
0
2
4
6
8
10
12
14
16
1 2 3
M-Drive
Overall vibration readings may give some information but will not be enough for machine diagnostics.
www.ecs2group.com P: (905) [email protected]
Cooling Tower Pump Drive EndP-Drive End
0
10
20
30
40
50
60
1 2 3
P-Drive End
www.ecs2group.com P: (905) [email protected]
Cooling Tower Pump Free EndP-Free End
0
10
20
30
40
50
60
70
1 2 3
P-Free End
Overall vibration readings may give some information but will not be enough for machine diagnostics.
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Vibration Analysis and Ultrasound PDM
Presented by: Liane HarrisL3 Vibration Analyst & Diagnostician,
L2 Ultrasonic Inspector, L1 Infrared Thermographer
ECS2 GroupEquipment Condition Sustainable Solutions
P: 905.593.2345