This course provides attendees the training needed to extend their knowledge of machinery diagnostic techniques and rotor dynamics as applied to rotating machinery. In particular, they will learn the use of synchronous and non-synchronous perturbation testing to evaluate complex dynamic stiffness in rotor/bearing/seal systems, including its modal parameters, and see how to bring analytical model response predictions in closer agreement with actual machine data. The class also examines how rotor torsional modes are coupled with lateral modes, and how that information may be used for early detection of shaft crack.
By the end of this course, delegates will be able to:
- give an account of common strategies and methods to plan and perform machinery maintenance,
- give an account of common failures in primarily rotating machinery and how vibration analysis can detect failure,
- give an account of different types of transmitters and their properties when measuring mechanical vibrations,
- plan, perform and interpret the results of condition check with vibration measuring,
- assess a measured vibration result with the help of relevant norms,
- balance a rotor on the principle of single-plane balancing using appropriate instruments,
- outline some simple methods of lubrication analysis.
Day 1
- Introduction to Rotating Machinery Dynamics
- Steady-State and Startup/Shutdown Plot Review
- Basic Rotor Modeling
- Stiffness Concepts and Calculations
- Critical Speed Maps
- Modal Mass Definition and Calculation
- Model Rotor Kit and Predict Resonance Frequency
- Fundamental Synchronous Rotor Response
- Synchronous Dynamic Stiffness Testing
Day 2
- Workshop: Single-Plane Balancing
- How to Handle Anisotropic Systems
- Multi-Plane Balancing (Static and Coupled Balancing)
- Polar Plot Balancing
- Static and Couple Balancing
- Workshop: Multi-Plane Balancing
Day 3
- Preload Forces on Machinery
- Internal Preloads (including Gears and Pumps)
- External Preloads (including Misalignment)
- Dynamic Stiffness Parameters – No synchronous Perturbation
- Workshop: Identify Dynamic Stiffness Parameters Using
No synchronous Perturbation Data
Day 4
- Fluid-Induced Instabilities of Rotors: Whirl and Whip – Summary of Results Instability Source Location
- Workshop: Diagnose and Control Fluid-Induced Instabilities
- Rotor to Stationary Part Rubbing
- Case History: Steam Turbine Rub During Startup and Generator
Seal Rub Showing Slowly Changing Amplitude and Phase Lag
- Workshop: Diagnose and Identify Partial Radial Rotor-to-Stator Rubs
Day 5
- Detection of Cracked Shafts
- Case History: Reactor Recirculation Pump with a Shaft Crack
- Compressors – Mechanical and Aerodynamic Design Surge and
Stall Malfunctions
- Seminar Summary – Questions and Answers
- Engineers desiring to advance their machinery vibration diagnostics skills
- Engineers involved in the design, acceptance testing, and maintenance of rotating machinery
- Post-graduate engineering attendees
- Academic researchers and professors involved in rotor dynamics