This book includes 12 chapters describing the latest technology for diagnosing a wide variety of gear problems including how each cycle of gearmesh frequency is generated, how to distinguish between pitch-line runout and tooth transition problems, and how to identify phase modulation. Review questions can be found at the end of chapter.
Chapter 1 - Introduction to Gear Analysis
Introduction
gear problems
gear quality specifications
required tools & vibration data
identified problems
chart information
signal processing
empirical data
Chapter 2 - Data Acquisition
introduction
how to take data
transducer selection
transducer polarity and the effect on phase
Chapter 3 - Gear Analysis Tools
a gear analysis program
a signal analysis program
single flank testing
Chapter 4 - Gear Physics and Specifications
evaluation of gear ratios
gear specifications
gear life expectancy
Chapter 5 - Gear Vibration Theory
generation of each cycle of gearmesh frequency
gearmesh frequency
“ghost” frequencies
amplitude modulation
frequency and phase modulation
amplitude measurements
Chapter 6 - Fractional Gearmesh Frequency
gear problems that cause one-half and one and one-half gearmesh frequency
other fractional gearmesh frequencies
Chapter 7 - Gear Problems that Generate Harmonics of Gearmesh Frequency
backlash problems and oscillating gears
misaligned gears and lead runout
flats and hob marks
Chapter 8 - Bent Shaft; Broken, Cracked or Chipped Teeth; Cracked or Broken Gears; and Looseness
gears mounted on a bent shaft
broken, cracked or chipped teeth and cracked or broken gears
looseness
Chapter 9 - The Calculation of Gear Frequencies
calculation of gearmesh frequency
calculation of GMF and speeds for planetary gears
application of planetary gear formulas
hunting tooth frequency
Chapter 10 - Analysis Techniques
basic analysis steps
case history of planetary gears
case history of gears mounted on parallel shafts
case history to explain the effects of looseness
Chapter 11 - Gear Problems and Causes
Case history discussions
Chapter 12 - Conclusion
Appendix
Works cited
Glossary
Index
