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A Powerful Application And Troubleshooting Method For Mechanical Seals
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1985)
Understanding the possible thermodynamic paths that a sealed fluid can follow as it goes from stuffingbox conditions, across the seal faces, and then exits to the atmosphere is a basic, but often overlooked, aspect of seal ...
Screw Pumps Of One, Two And Three Screw Design
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1985)
Some fluid solutions utilized throughout the world have proven to be difficult to move, using “conventional” pumps. These included gas-liquid, Newtonian and non-Newtonian fluids. The screw pump, with its inherent slow ...
Critical Speed Analysis Of An Eight-Stage Centrifugal Pump
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1985)
A critical speed and unbalance response analysis of an eight-stage centrifugal pump was performed, considering the variation of stiffness and damping coefficients with speed for both the oil firm bearings and the fluid ...
Experimental Study Of The Influence Of Backflow Control On Pump Hydraulic-Mechanical Interaction
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1985)
A series of right-angle pump intakes, incorporating minimum axial depths and decelerating flows, has been experimentally evaluated using an air flow test procedure. Performance was measured, internal flow fields observed ...
Table of Contents for the Proceedings of the 2nd International Pump Symposium
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1985)
Modern Cavitation Criteria For Centrifugal Pumps
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1985)
It is well known that the performance of a rotordynamic pump deteriorates when the suction pressure is reduced below a certain value. The suction pressure is usually qualified in relation to the vapor pressure at the suction ...
Flow Patterns Causing Instabilities In The Performance Curves Of Centrifugal Pumps With Vaned Diffusers
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1985)
It is well known that backflow regimes at the impeller inlet can lead to performance instabilities for centrifugal pumps at flowrates smaller than about 65 percent of the impeller inlet design flowrate. Performance curve ...
Forces On Centrifugal Pump Impellers
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1985)
Forces are exerted on a centrifugal pump impeller, due to the asymmetry of the flow caused by the volute or diffuser, and to the motion of the center of the impeller whenever the shaft whirls. Recent work in the measurement ...
Reverse Indicator Cold Alignment With Graphical Plotting
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1985)
An update and a demonstration of the reverse indicator alignment method with graphical plotting are presented. Hot alignment methods are not covered, but it should be clear that heat rises (falls) can be plotted directly ...
Reliability Improvement In Mechanical Seals - Analysis Of Design Considerations
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1985)
The differences between mechanical and shaft seal devices intended for high reliability and seals which were designed without reliability as the foremost consideration are examined and explained. Highlighted are such ...