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Now showing items 721-730 of 808
Design And Testing Of A Zero-Net Radial Taper, Radially Compliant Face Seal
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
Conventional seal designs, the net radial taper changes with operating conditions so that contact is not always maintained across their entire width and leakage can occur. The “zero-net” face seal combines two ideas to ...
Enhanced Mechanical Seal Performance Through Proper Selection And Application Of Enlarged-Bore Seal Chambers
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
Recent studies of enlarged-bore seal chambers document the influence of chamber design on seal performance. The studies utilize laser Doppler velocimetry (LDV), high speed videography, and computational fluid dynamics (CFD) ...
The Use Of Wavy Face Technology In Various Gas Seal Applications
(Texas A&M University. Turbomachinery Laboratories, 1998)
Wavy face technology in mechanical face seals is the use of circumferential waves manufactured into a seal face. This unique wavy shape is bidirectional, can be used in liquids, gases or combination, and incorporates a ...
An Innovative Upgrade And Performance Rerate Of Large, High Speed, High Temperature, Multistage Barrel Pumps
(Texas A&M University. Turbomachinery Laboratories, 1998)
High pressure hydrocracker charge is one of the most arduous services for multistage centrifugal pumps in the refining industry. Future plant capacity requirements of the hydrocracker unit at a United Kingdom site required ...
Sleeve Type Bearings And Their Lubrication Systems In Vertical Turbine Pumps, Mixed Flow And Axial Flow Pumps
(Texas A&M University. Turbomachinery Laboratories, 1998)
Shafting and different sleeve type bearing systems, and the associated lubrication arrangements to support these systems in vertical diffuser type pumps, are discussed.
Dry Running Tests Utilizing Silicon Carbide Bearings And Polymer Lubricating Strips With Conductive And Nonconductive Containment Shells In An ANSI Magnetic Drive Pump
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1995)
As users continue to turn to sealless pumps to solve their leakage (emission) problems they are demanding robust designs that are more tolerant of system upsets and have the ability to survive short periods of dry running. ...
Analyzing Unacceptable Seal Performance
(Texas A&M University. Turbomachinery Laboratories, 1998)
For many years, acceptable seal performance was defined as “minimal or no visible leakage.” During the last decade, these definitions have changed immensely as government and industry have combined in a massive effort to ...
Reliability Improvements To A High Pressure, High Temperature, Thirteen Stage Charge Pump
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1994)
Reliability of a high pressure charge pump has been a problem for over 20 years. Unplanned unit outages and sometimes fires accompany pump failures. This paper details the joint effort of the OEM and the user to resolve ...
Rotating Equipment Pump Reliability Upgrading Project
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1994)
In 1988, a general performance assessment was undertaken at Shell UK’s Stanlow Manufacturing Complex to review its competitive position in the market place. The review concluded there was a high level of maintenance ...
Continuous Monitoring Of Sealless Pumps - The Next Step
(Texas A&M University. Turbomachinery Laboratories, 1998)
All centrifugal sealless pumps, both canned motor and magnetic drive, should be monitored to determine mechanical condition. In sealless pumps, the pumped fluid is used as the cooling and lubricating medium for the pump ...