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Resolving High Vibration On a Vertical Pump
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
High vibration were observed on the motor, pump,structure for more than 2 years with 1X dominant motor vibration. Assuming that the issue is of complete structural issue even though this motor was running well in the past, ...
Vertical Turbine Pump Reliability Improvement
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
The 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 ...
Use of Motion Amplified Video to Diagnose Pump Vibration
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Use of Operating Deflection Shapes (ODS) has become an accepted method for understanding and diagnosing pump and other turbomachinery vibration problems. However, data acquisition can take a long period of time, and requires ...
Up-thrust and Seal Failures on a Vertical Can Pump
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Pine Bend, MN, 12x10, 9 stage vertical can pump, 600 hp, 1780 rpm
A new smaller, higher efficiency motor was installed to replace the old motor and shortly after numerous mechanical seal failures occurred. The motor ...
Improvement of Rotating Equipment Reliability Using Optical Metrology
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Extreme thermal piping displacements were thought to be the root cause for the observed failures at a large refinery, namely 9 mechanical seal failures in 3 months. Optical Metrology methods were used to identify failure ...
NPSHR (NPSH3) Improvement of a Low Pressure Safety Injection Pump
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
This case study discusses the rerate of a set of vertically-mounted single-stage end-suction centrifugal pumps used for low pressure safety injection (LPSI) in a nuclear power plant. The original LPSI pumps were supplied ...
A Case Study of Vibration in Positive Displacement Pump Systems
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Positive displacement pump systems can experience high piping vibrations. System vibration can have many root causes- including underdamped fluid pulsations, mechanical resonance, and poor skid design. This case study shows ...
Fugitive Emissions Containment using a Dual Pressurized Seal and API Plan 53B
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Fluids that require limited emissions are often sealed using dual pressurized mechanical seals and sealing systems. API Plan 53B systems use a bladder accumulator to provide the pressure for the barrier fluid to isolate ...
Investigating & Improving the Drooping Curve of a Two-Stage Feed Pump
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
A two-stage feed pump exhibited a drooping head-flow characteristic during its shop test. Impeller reworks were done to improve the drooping curve. CFD study was performed to examine the pump flow behaviour and a more ...
Correction of High Vibration on a Vertical Turbine Deep Well Pump with a Dynamic Vibration Absorber
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
A 100 horsepower, 180 foot deep vertical turbine pump called #12 Well Pump had a history of reoccurring high vibration despite multiple pump rebuilds and motor replacements. The problem was identified as a structural ...