Results 41 to 50 of about 629,952 (70)
This study investigated the impact of different load distribution ratios between two rotors on the unsteady performance of dual-stage pump-jet propulsors using Computational Fluid Dynamics (CFDs) and experimental methods. The Shear Stress Transport (SST)
Dazhuan Wu +6 more
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Vertical Turbine Pump Reliability Improvement [PDF]
, 2018 Case StudyThe subject pump was designed and installed when pipeline pressure was estimated high based on a higher production volume. The selected multistage vertical turbine-pumps are generically prone to vibration issues due to its flexible shaft design.
Zhao, Yve
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, 1992 Tutorialpg. 137The reliability and failure mechanisms of high energy pumps used in the utilities industry and the high suction specific speed pumps used in the hydrocarbon processing industry show surprising parallels as to root causes.
Nelson, William E.
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Investigating & Improving the Drooping Curve of A Two-Stage Feed Pump [PDF]
, 2018 TutorialsA two-stage between-bearing pump of the upgraded material was supplied to replace the existing machine. The pump utilized a higher number of impeller blades to obtain higher efficiency at its design point, but exhibited a drooping head-flow ...
Tzuu Bin, Ng, Bin Ng, Tzuu
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The potential value of the new type of vector propulsor in submarine movement has been confirmed. However, some key mechanical issues are not fully understood, especially the hydrodynamic characteristics during oblique motion.
Rennian Li +5 more
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Improving Mean Time Between Pump Failures [PDF]
, 2018 Discussion GroupMechanical/Metallurgical design requirements for pump components Design and installation for pump baseplates Proper hydraulic fit of pumps Mechanical alignment targets/procedures Pump repair ...
Bruck, Morg +3 more
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Under non-uniform wake conditions, the effects of Reynolds-number variation on the broadband-force response of a pump-jet propulsor remain unclear. In this study, an experimentally validated large-eddy simulation method is used to systematically examine ...
Haiting Yu +5 more
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This study investigates the unsteady forces and flow characteristics of a fully appended SUBOFF model combined with a pump-jet propulsor using a three-dimensional unsteady numerical simulation based on the SST k-omega turbulence model.
Li, Ning +10 more
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Base Plate Corrosion and Premature Bearing failure in RO Pump [PDF]
, 2018 Case StudiesOn 19th Aug 2017, abnormal noise noticed from RO (Reverse osmosis) Membrane Feed pump coupling area. Checked the vibration for pump & motor and found very high vibration at Pump Drive end. The vibration level at Pump DE Vertical recorded as 4.
Subramanian, Moorthy
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Centrifugal Pump Operation, Maintenance, and Reliability [PDF]
, 2018 Discussion GroupRepair Specs, use, in house repair specs Lube oil storage and usage Mechanical seals and bearings issues Pump monitoring how are we doing this and how do we want to do this Craft training precision maintenance Best practices for pump
Gottlieb, Adam +7 more
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