Upload
abdul-abbasi
View
518
Download
23
Tags:
Embed Size (px)
DESCRIPTION
Steam Turbine, Condition Monitoring, Maintenance
Citation preview
Condition Monitoring for Steam Turbines
Presented by
Engr. Dr. Abdul Rehman AbbasiEmail: [email protected]
June 26, 2014
Motivation to Learn About this Topic
• Early (Just-In-time) Detection of Faults/Abnormalities
• Corrective Action in Time to Save Valuable Assets and Avoid Production Losses
What we are going to discuss here:
1. (Steam) Turbine Operation-A Reminder2. Identify the Monitoring Methods3. Identify the Failure Modes
What does a turbine actually do?• Steam in and Steam Out…..• The steam comes in under a certain set of
pressure, temperature, and flow conditions; and goes out under another set of pressure temperature and flow conditions
• The change in steam conditions occurs because we are using some of the energy in the steam to rotate the turbine rotor
Condition Monitoring Methods
• Some common methods are:– Steam Conditions and Flow Rates– Vibration– Lubrication Conditions– Bearing Condition– Rotor Speed– Noise Level– Auxiliary System Operation
Operating Limit is the Key
Selection of Vibration Measurement Points
Vibration Analysis: Standards
Probable Failure Modes• Bearing failures from:
• Loss of lubrication• Lubrication contamination• Excessive load
• Overspeed protection
• Blade failures:• Foreign object damage• Erosion• Fatigue
• Valve failures:• Solid particle damage• Erosion• Fatigue
• Steam seal failures:• Wear• Erosion• Corrosion
• Governor/Regulation failure
• Insulation failure
• Coupling failures
• Hydraulic system failure • Alignment Changes
Failure Modes
Failure Modes
Conclusion
• Condition monitoring of steam turbine is critical to identify faults and provide remedies
• Condition monitoring methods are there to ascertain equipment condition
• Failure modes could be prevented by appropriate condition monitoring and preventive measures