Balancing Specialist

Subject:

 Basic Balancing (4 hours):

•          Mechanism of Balancing
•          Causes of Mass Unbalance
•          Definitions
•          Terminology
•          Force of Mass Unbalance
•          Pre-balancing Checks
•          Measurements
•          Run Out Subtraction
•          Critical Speed
•          Simple Vector Method
•          Trial Weight Selection
•          Natural Frequencies and Modes
•          Phase Relationships
•          Phase Measurement
•          Balancing Pitfalls

 Vibration Testing and Analysis (4 hours):

•          Period, Frequency, Amplitude, Phase
•          Harmonic/Periodic Motion
•          Vibration Measures
•          Analysis
•          Resonance, Critical Speeds

o   Misalignment

o   Bent Shaft

o   Flow Noise

o   Defective Bearings

o   Excessive Clearance

o   Looseness

o   Electrical Faults

•          Transient Testing

o   Bode Plot

o   Polar Plot

•          Critical Speed Testing
•          Lag Angle Testing

 Balancing Techniques (16 hours):

•          Single-plane Vector Method (one-shot Method)
•          Balance Sensitivity and Phase Lag Calculation
•          Four Run Method
•          Weight Splitting and Consolidation
•          Two Plane Method

 Balance Limits (2 hours):

•          Vibration (Seismic, Shaft)
•          ISO 1940, ANSI S2.19
•          API

 Field Balancing (4 hours):

•          Fans
•          Motors
•          Turbine-Generators
•          Rolls

 Shop Balancing (1 hour):

•          Techniques
•          Balancing Machines

 Safety (1 hour):

•          Lock-out
•          Trial Weight Size
•          Trial Weight Attachment
•          Trial Weight Location
•          Equipment and Clothing