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Now showing items 131-140 of 157
BB1 Lateral Dynamic Analysis
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Customer has four 4x8x13 BB1 booster pumps for produced water injection. One pump was recently repaired and ran for only 4 months. Typically these pumps run about 16-18 months. Before shutting down the pump it had a high ...
Structural Natural Frequency Tuning on a Vertical Pump
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
This case study demonstrates the steps taken to solve a structural resonance issue on a VFD driven vertical pump installed in the field. Topics discussed include problem validation, steps taken to solve the issue, the ...
Unsteady Vibration Due to Cavitation in Mixed Flow Pumps
(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 ...
Blade Failures on an Axial Compressor by Unexpected Gas Compositions
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
A fifteen stage axial compressor including a bleed extraction was subject to a major overhaul after nearly 20 years of trouble free operation. Shortly after recommissioning and resumption of the production the compressor ...
Large Vibrations on Centrifugal Compressor Caused by Inappropriate Operation During Mechanical Running Test
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
During the mechanical test of a centrifugal compressor, the rotor experienced a sudden increase of the radial vibrations. After re-start, the compressor showed unacceptably high vibrations.
The RCA revealed: The vibrations ...
Accurate Estimation of Start-Up Pulsating Torque of Direct On Line Synchronous Motors Driving Compressor Trains
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
In a compressor train driven by fixed speed synchronous motor (>17MW) was discovered a potential torsional problem on the input shaft of the hydraulic variable speed gear during the start-up phase when only low speed shaft ...
Gear Box Bull Gear High Vibration due to Fluid Instability and Analytical Evaluation of New Bearing Design
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Three shaft Gear Box upgraded to meet Screw compressor model upgrade. Gear Box was installed, as a part of compressor upgrade project, with Bentley Nevada 3500 Shaft vibration protection facility and observed trip on ...
Unexpected Vibrations in Gearbox Caused by System Integration Issues
(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 ...
Failure, Repair and Overhaul of 5 MW Right Angle Reduction Gear Box
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
L-1403A &B are 5 MW Right Angle –Double reductions gearboxes installed between Turbine (TP-1403) and Cooling water Pump (P-1403). Both gearboxes reported high vibration after 15 months of continuous operation one after the ...
Rotordynamics Analyses of a Modified Hydraulic Power Recovery Turbine
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Problem Statement, Machine Information, Torsional Model & Assumption, Torsional Response & Results, Tuning Methods, Field Validation, Conclusion