Browsing by Author "Yu, John J."

Now showing items 1-6 of 6

    • Conversion of Influence Coefficients among Static-Couple and Multiplane Formats On Two-Plane Balancing 
      Yu, John J.; Péton, Nicolas (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station; Texas A & M University. Libraries; Texas A & M University. Libraries, 2021)
      The influence coefficient (IC) method is typically used in balancing, especially on-site. For a two-bearing machine, there are basically two approaches to apply this method. The first one is to treat it as a multiplane ...
    • Detection of Broken Blade on Compressor 
      Yu, John J.; Wang, Carl Feng; Yuan, Mingfeng; Peton, Nicolas; Guan, Xiaodong (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2022)
      A sudden step change in vibration was observed on a 7400 rpm compressor with direct amplitude from 43 um pp to over 62 um pp (trip level) at NDE, thus tripping the unit Vibration reached over 120 um pp at 4000 rpm, compared ...
    • ELECTROSTATIC  DISCHARGEâ€� STG  COMPRESSOR 
      Ponnanna, Bopanna Pudiyokada; Yu, John J.; Peton, Nicolas (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2022)
      Electrostatic discharge (ESD) can cause catastrophic mechanical damage and lower the life span of an asset if not detected early and rectified. Continuous discharge of static electricity can cause micro pitting of bearing ...
    • Power Turbine Field And Shop Balance Experience 
      Yu, John J.; Kirker, Michael; Peton, Nicolas (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station; Texas A & M University. Libraries, 2022)
      A power turbine (PT) experienced a high 1X vibration issue. Balancing was attempted at two accessible planes on the shaft section. However, the unit could only operate with vibration below the alarm level in steady-state ...
    • SILO EXHAUST FAN – STRUCTUAL VIBRATION  ODS AND MA 
      Ponnanna, Bopanna Pudiyokada; Yu, John J.; Drygin, Sergey; Peton, Nicolas; Schluter, Steven (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2022)
      This case study outlines how structural vibration was resolved using two different technologies and highlighting secondary issues that can arise due to continued vibration because of structural resonance. Continued high ...
    • Sub-Synchronous Vibration on Centrifugal Compressor with Tilt-Pad Bearings 
      Yu, John J.; Hanson, Nicholas (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      This presentation provides a success story that sub- synchronous vibration was eliminated on a centrifugal compressor. The sub-synchronous vibration originally occurred at high operational speed on this 5-stage hydrogen ...