One Day Seminar: Troubleshooting Vibration Problems in Industry

Seminar Objective

This seminar provides practical vibration information and methods that the presenter has used during his 40 years in industry.

At the end of this accelerated one day seminar the participants will have an understanding on the type vibration problems existing in industry and what other companies have done to prevent these type problems from occurring or re-occurring.

This seminar is intended for engineers and all plant personnel responsible for equipment reliability.

Outline

1. Vibration and when do you know you have a problem

a. Extensive wear  
b. Fatigue cracks and broken components
c. Looseness
d. Excessive noise

2. Methods to measure vibration: Advantages and Disadvantages

a. Displacement  
b. Velocity
c. Acceleration
d. SPM
e. Vibration of Piping
f. Feel

3. Sources of Vibration

a. Unbalance Causes and Allowable Unbalance  
__- Normal
__- Missing parts
__- Shaft bow
__- Fouling
__- Product
b. Misalignment Causes and Allowable Misalignment  
__- Mechanical
__- Thermal
c. Damaged Components  
__- Bearings
__- Couplings
d. Pressure Pulsations  
__- Normal
__- Abnormal
e. Local Resonances  
__- Structures
__- Foundations

4. Determining Allowable Vibration Limits

a. Baseline data  
b. Vibration limits  
__- On case or housing
__- On shaft
__- On piping

5. Class Worked Troubleshooting Exercise

6. Other Common Causes and Remedies of Vibration Problems

a. Pumps  
__- NPSH
__- Off-design conditions
b. Centrifugal Compressors  
__- Instabilities
__- Oil to gas seal conversions
c. Gearbox  
__- Spline distress
__- Damaged teeth
d. Fans  
__- Instabilities
e. Motors  
__- Electrical
__- Mechanical
__- Soft-foot
f. Rotary Screw Compressor Case History  
__- Vibrating skid
g. Heat Exchanger Vibration Problems and Prevention  
__- Tube vortex vibration
__- Other types of vibration
__- Preventative methods
h. Piping  
__- Resonance and bracing
__- Acoustical
__- Hydraulic hammer

7. Torsional Vibration

a. What it is and why it is different  
b. Why it is important to understand on new designs
c. Engine-gearbox-propeller torsional case history