Now showing items 275-285 of 285

    • Bidaut, Yves (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2022)
      During the commissioning of a Main Air Compressor in an Air Separation Unit, the rotor showed increased radial vibrations at the Non-Drive End probe. The RCA revealed: The vibration resulted from the excitation ...
    • Boccadamo, Gianluca; Maragioglio, Gaspare (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      This case study deals with a 24MW turbo-compressor unit composed of a gas turbine, a speed reduction gearbox with a lube oil pump mounted on its low speed shaft and two compressors in series. The unit was subject to high ...
    • Nakano, Takuya (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      In regarding to the large vertical mixed flow pump for seawater supply pump, the authors experienced the strange excessive vibration: the vibration level intermittently changed and the peak frequency was the blade passing ...
    • Abdel Fatah, Amr; Lofty, Mohamed; Hassan, Mohammed; Dimitri, Antoine (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Condition based maintenance (CBM) is a very useful technique built around the concept of monitoring the operation of assets. This allows performing diagnostics, troubleshooting and determining the proper maintenance ...
    • Xu, Jack (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Technical Brief 3: Flexible couplings are a critical component in turbo-machinery train. It is a challenge and very important for coupling designers to select suitable materials for special turbo-machinery applications. ...
    • de Guarda Matos, Danilo; Silva de Matos, Wiriton (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      This paper describes the investigation of whether the vibration shock limits were exceeded on the transportation of 2 gas turbines. This investigation was requested due to an improper suspension type of the carriage used ...
    • Jun, Ker Pin; Sing, Ng Wei (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2022)
      A special purpose steam turbine has started to experience intermittent radial vibration spikes. The turbine is used to drive a Hydrogen Recycle Gas Compressor in Aromatics unit. No abnormality observed on the compressor ...
    • Schiavello, Bruno; Cicatelli, Giancarlo (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
      Case Study 20: Several pumps of same design exhibited field vibrations above API limits, dominated by Vane Passage Frequency (VPF). Root cause analysis included both experimental and theoretical paths. Experimental ...
    • Wright, Gary; Peton, Nicolas; Drygin, Sergey; Yu, John; Davies, Dave (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2022)
      “Part 1 of the case history for this return to service follows on from the 2021 ATPS “ presentation which covered off the Expander related issue (labyrinth seal rubs) preventing the NAP 2 plant from successfully re ...
    • Zhang, Matthew (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2022)
      A wet screw refrigeration compressor had three failures and all failures were related to male rotor High- High axial displacement. The failure was concluded to be due to liquid propane formation at compressor suction, ...
    • Watanabe, Takuya (Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
      Dry gas seal is applied to refrigeration compressor. Some of configurations for dry gas seal system are shown in API 617 and 614, however those systems are designed with condition that leak gas from dry gas seal is released ...