Hydraulic Removal of Keyed Hubs The ASME paper describes the principle of the hydraulic removal, in a theoretical and practical format, outlining the hydraulic system components and requirements. Several equations are given for calculation of the force capacity of the hydraulic cylinder, and correlation of theoretical and test data. This paper also contains the basic equations for the design of hydraulic removal system. Joseph Zilberman and Rob Munyon ASME 1989
Developments in Continuous Torquemonitoring Couplings Paper discusses the benefits of torque monitoring couplings for Ethylene plants and compares and contrasts the different varieties of torquemeter couplings commercially available. Also, it discusses recent advancements in the technology of torque monitoring couplings. Bill Meier and Dave Edeson 2006 Ethylene Producers' Conference - AIChE Spring Meeting - Orlando April 2006
New pump coupling reduces effects of torque, misalignment and unbalance As a result of innovative technology, advanced material and computerization, elastomer coupling are able to attain lower stress at high misalignment, reduced moment loads on bearing due to coupling, reduce loads due to unbalance and highly reliable couplings. The patented dual flexible element elastomer couplings for pumps is designed for lower life cycle cost of the system (not just couplings). Matt McGinnity and Jon Mancuso World Pumps May 2005
Mission-critical couplings Couplings are critical part of the turbomachinery train. Article addresses what Turbomachinery users should know in terms of correct operation, selection and maintenance of couplings based on the 2004 Turbomachinery Symposium discussion session on couplings and alignment. Joe Corcoran Turbomachinery International Magazine January/February 2005
What are the differences in high performance flexible couplings for turbomachinery? Although any high performance special purpose coupling can be designed for most applications, there are some times one type fits better than the other. Choosing the best design can ensure more reliably operating turbomachinery. Paper discusses difference between flexible disc, flexible diaphragm, gear and hybrid resilient couplings. Jon Mancuso and Joe Corcoran Turbomachinery Symposium September 2003
And you thought all flexible couplings are the same. Paper presents several couplings used on pump applications with comparative data table, on criterion based on survey of pump users, on each coupling with advantages they offer. Kop-Flex' new Odyssey coupling stands above all the other pump couplings. Jon Mancuso World Pumps April 2004
Kop-Flex Plant Blossoms in Slovakia. Editorial from Turbomachinery Magazine editor based on his visit to Kop-Flex' state of the art turbomachinery coupling plant in Nove Mesto, Slovakia. The plant in Slovakia is to support widest variety of Kop-Flex high performance turbmachinery couplings (disc, diaphragm, gear couplings and Powerlign torque monitoring system) for the European, Middle East and Asian markets. Turbomachinery Editors Turbomachinery International Magazine March/April 2004
What is an Acceptable Coupling Lateral Critical Speed? A case study and guidelines used to evaluate the lateral critical speed (LCS) of high performance couplings for turbomachinery. J.P. Corcoran Turbomachinery International Magazine May/June 2003
Coupling's Interface Connection In rotating equipment, torque is usually transmitted from shafts to coupling hubs through keys, friction or a combination of these. Several issues to consider in selecting interface connection: Ease of assembly/disassembly, reliability of connection, how much torque can be transmitted and field conditions.
 		 Mancuso, Jones Turbomachinery Symposium 2001
Improving The Reliability and Performance of a Melt Pump Application in a Petro-chemical Plant with Block Style Universal Joints Case study on a melt pump in petrochemical plant: replacing gear spindles with highly reliable and maintenance free Maxxus universal joints. Increased uptime and reduced parts as well direct and indirect material cost.
 		 Amin, McGinnity, Hudson International Pump User Symposium 18th 2001
Engineered mill spindles and bearings Patented ground gearing (CGG) technology applied in hot strip mill to improve its operating performance as well as specialty low maintenance bearings is discussed.
 		 Amin, Vilardi Steel Technology Asia 2001
Just How Flexible Is Your Flexible Coupling in Reality? Alignment of equipment can greatly dictate the coupling life and hence it has become a critical issue, however new flexible couplings can accommodate 1-3 degree misalignment. The main reason one needs to align equipment better is due the axial and radial load on the connected shafts, seals and bearings causing them to wear or fail prematurely.
 		 Jon Mancuso World Pump 2000
A New Development in Continuous Torque Monitoring Couplings The use of continuous torque monitoring couplings is quickly becoming an integral part of many predictive maintenance programs in petrochemical, process and pipeline industries. Discussed are the theories of operation and how they work, in addition, accuracy measurement and types of torquemeters available in the market today.
 		 Corcoran, D'Ercole ASME DETC2000/PTG-14455 2000
Improving reliability and Performance of bar mill rolling stand spindles - a cooperative partnership Shifting technology from high maintenance to low maintenance in a bar mill case study is presented with details of Maxxus universal joints replaced existing gear spindles and the tremendous cost savings and less noise and environmental pollution is discussed.
 		 Amin, D'Angelo, Maguire AISE Conference and Steel Show 1999
Discovering, The Hard Way, How a High Performance Coupling Influenced the Critical Speeds and Bearing Loading of an Overhung Radial Compressor - A Case History
 		 Adding weight to coupling to solve rotor dynamics compressor problem at IMC Kalium in Canada. Corcoran, Rea, Cornejo, Leonhard Turbomachinery Symposium 1997
Lets Try to Really Understand Coupling Balance Discussed are the basics of coupling balance, why a coupling is balanced, what contributes to unbalance in a coupling, how to bring a coupling into balance, when to balance a coupling, what level, coupling balance limits, arbitrary balance criteria, and values.
 		 Mancuso, Jon ASME 1996
Is The Dry Coupling Really Causing Your Vibration Problem Coupling vibration and sometimes damage can be a symptom of other problems in the train. What these vibrations mean is addressed as related to the coupling and vibration signature. Field cases are presented where suspected coupling problems turned out to be something entirely different - resonance condition in feedback loop or pipe strain induced misalignment.
 		 Corcoran, Coenejo, Chen Turbomachinery Symposium 1995
The Baffling and Temperature Prediction of Coupling Enclosures Case study on coupling enclosure temperature on actual applications at the Marathon Oil Refinery and at Elliott Company's facilities and in other field installations to correlate test data with predictive temperatures using existing formulas/programs.
 		 Corcoran, Carter, Garvey Turbomachinery Symposium 1994
Flexible-element couplings: How safe is safe Guidelines to help evaluate disc and diaphragm designs for Turbomachinery. There are several service factors to consider: Endurance, Yield, Maximum continuous rating, Peak rating, Maximum momentary rating.
 		 Mancuso, Zilberman, Corcoran, D'Ercole Hydrocarbon Processing 1994
General Purpose vs. Special Purpose Couplings Definition of general vs. special as defined by API. Also details on how and what types of general purpose coupling and special purpose couplings. How to select and dos and don'ts in selection of coupling.
 		 Mancuso, Jon Turbo-Machinery Tutorial  1994
Pump Couplings Various types of couplings used in pump application is discussed. API 610 is one of the few specifications in the industry, besides AGMA and API 671 that have specific requirements for couplings - API 610 is for pump applications.
 		 Mancuso, Jon Pumps and Systems Magazine 1994
Retrofitting Turbo-machinery with High Performance Flexible Dry Coupling When retrofitting gear with dry couplings, it is important to understand the implications. Besides size selection, must consider weight, center of gravity, torsional stiffness, axial frequency and other criterion are discussed.
 		 Wolford, Christian Turbomachinery Symposium 1990
Flexible Couplings for Gas Turbines Applications Comparison of characteristics between diaphragm and gear coupling used in industrial gas turbine applications including turbine to generator, turbine to mechanical drives (compressor, pumps and gearboxes), and coupling between turbine and accessory gear box.
 		 Mancuso, Jon ASME 89-GT-226 1989
The Application of Flexible Couplings for Turbo-machinery Details on Why use flexible coupling, functions of flexible coupling, classification of couplings, general purpose and high performance couplings, couplings effect on system, balance and retrofit of coupling is detailed.
 		 Mancuso, Munyon, Gibbons Turbo-Machinery Tutorial 1989
Retrofitting gear couplings with diaphragm couplings Retrofitting should be pre-planned when upgrading a system to. Retrofitting gear with non-lubricated diaphragm improves reliability and uptime. Criterions to consider include size, material, heat generation due to windage, axial natural frequency and other conditions.
 		 Mancuso, Jon Hydrocarbon Processing 1988
Diaphragm Couplings versus Gear Couplings for Marine Applications Benefits and limitations of both diaphragm and gear coupling in marine application is discussed. Application requirements, inherent characteristics, reaction forces on connected equipment, reliability, weight, noise, etc. is detailed.
 		 Mancuso, Jon-Paluh, James Marine Technology volume 25, #4 1988
Putting the Damper on Torsional Vibration Torsional vibration is a leading cause of rotational equipment breakdown. Paper details on how to analyze and control it.
 		 Wright, John Power Transmission Design 1988
Couplings as Part of a System Several steps in selection of a coupling: Determining requirements, selecting the right type, size, characteristics, analysis of system, review and success.
 		 Mancuso, Jon Vibration Institute Presentation 1987
Disc vs. Diaphragm Couplings Although disc and diaphragm are similar and non-lubricated dry coupling. Using the wrong one can raise havoc in equipment. Two important considerations for sizing: operating stresses and safety factor in flexible membrane.
 		 Mancuso, Jon Machine Design 1986
Friction Between High Speed Gear Coupling Teeth Results of exhaustive test program on measurement of friction forces between hub (male) and sleeve (female) gear coupling teeth, as a function of several variable: torque, axial velocity, misalignment and lubrication. Lubrication proved to have the largest contributing factor for wear.
 		 Calistrat ASME 80-C2/DET-5 1985
Design of Coupling Enclosure When couplings rotate at high speeds in oil-tight enclosures, they shear air, this shearing results in significant heat generation. Paper presents formulas and design guidelines, based on test results, on calculating enclosure temperature due to coupling and fabricating enclosures which operate at acceptable temperatures.
 		 Calistrat, Munyon Turbomachinery Symposium 1985
How Flexible is Your Coupling Decision Information required for coupling selection: shaft dimensions, load, speed, application, space limitations, misalignment and machine movement is discussed.
 		 Mancuso, Editor Strovick Power Transmission Design 1984
Custom Designed Couplings Custom designed are application specific coupling as opposed to generic or stock coupling available from shelf. Custom designed applications discussed are for rotating equipment for industrial gas turbine drives, steel mill drives and aircraft drives.
 		 Mancuso, Jon ASME 84-DET-195 1984
The Manufacturer's World of Coupling Potential Unbalance Discussed are the basics of coupling balance, why a coupling is balanced, what contributes to unbalance in a coupling, how to bring a coupling into balance, when to balance a coupling, what level, coupling balance limits, arbitrary balance criteria.
 		 Mancuso, Jon Turbo-Machinery Lecture 1984
Shaft-Coupling Lubrication Flexible shaft couplings like gear, grid, and chain require lubrication due sliding motion. Paper discusses why every type of grease or oil is not suitable for coupling lubrication. Criterion are established for selection of best lubricants as a function coupling type and application.
 		 Calistrat, M. M. Journal of the American Society of Lubrication Engineers 1980
Gear Coupling Lubrication Paper details how lubricants work inside the coupling and explains the particular motion between gear coupling teeth.
 		 Calistrat, M. M. Kop-Flex Paper 1980
Extend Gear Coupling Life Proper lubricant selection greatly increases the life of gear couplings. Principles of gear wear and lubricant is detailed.
 		 Calistrat, M Hydrocarbon Processing 1979
Extend Gear Coupling Life - Part II How adequate lubrication, reducing sludge accumulation and proper maintenance techniques can improve the service life of high speed coupling is discussed.
 		 Calistrat, M. Hydrocarbon Processing 1979
Flexible Couplings for High Powers and Speeds - Verification of Metal Diaphragm Coupling Performance Data presented based on extensive test results of full size couplings under extreme conditions verified the operating limits derived through calculation. Mode of failure of profile diaphragm when stressed above endurance limit depends on angular misalignment and axial displacement.
 		 Calistrat, M. M. International Conference on Couplings 1977
Metal Diaphragm Coupling Performance Full scale tests conducted in the lab under a variety of extreme conditions confirmed the operating limits and provides a pictorial reference on diaphragm couplings. Various factors influence the endurance limit and on the consistency of endurance limit.
 		 Calistrat, M. M. Turbomachinery Symposium 1977
Shaft Coupling and the Cinderella Syndrome Shaft coupling controls the forces unleashed by drive systems and its dynamic forces. Paper examines the versatility of couplings in four drives: diesel-marine propulsion, turbo-compressor, steel rolling mill and synchronous motor.
 		 Wright, John ASME 77-DET-132 1977
Grease Separation Under Centrifugal Forces Grease in gear couplings under centrifugal forces tend to separate into oil and soap. Paper presents the characteristics of grease separation, under various "G" forces, based on test results.
 		 Calistrat, M. M. Form 3924 1976
What causes wear in gear-type couplings Paper examines some facts that may avoid coupling failures on critical rotating equipment machinery train due to wear of gear teeth. The wear rate is heavily influenced by lubrication and type of wear that occurs.
 		 Calistrat, M. M. Hydrocarbon Processing 1975
Hydraulically Fitted Hubs, Theory and Practice Transmission of torque between hub and shaft can be efficiently transmitted through the use of friction. Practice of hydraulic installation and removal is simple if: very good contact pattern at interface, cleanliness of the parts, accurate measurement of pressures and motions, and observance of safety rules.
 		 Calistrat, M.M. Turbomachinery Symposium 1975
Isolating Engine Vibration Husky engines, especially diesels, can easily induce destructive forces in driven machinery such as generators, pumps, or marine propulsion systems. Paper shows simple way to analyze a system and select a coupling to isolate these vibrations.
 		 Wright, John Machine Design 1975
Which shaft coupling is best lubricated or non-lubricated Discussion on advantages and disadvantages of lubricated gear type and dry disc or diaphragm type couplings. The discussion is categorized between low speed (pump type drives) and high speed (Turbomachinery drives).
 		 Wright, John Hydrocarbon Processing 1975
A Practical Solution to Transient Torsional Vibration in Synchronous Motor Drive System In synchronous motor drives, resonant torsional vibration can occur during start up. Calculation is presented for estimating peak transient vibratory torque. Various types of vibration damper and calculation method extended to permit the evaluation of the effects of employing a resilient coupling-damper in order to reduce vibratory torque amplitude.
 		 Wright, John ASME 75-DE-15 1975
Torsional Stiffness of Interference Fit Connections Mathematical model, confirmed by lab tests, to determine the torsional stiffness of an interference fit shaft connection is detailed to replace the traditional empherical rule. Interface connection is not constant, as generally thought, it is a function of transmitted torque and the rotating speed.
 		 Calistrat, Leaseburge ASME 77-PTG-37 1972 1975
Sludge Accumulation in Continuously Lubricated Couplings High speed coupling are commonly lubricated through a continuous oil flow which inherently causes sludge accumulation problem. Better understanding of the sludge accumulation and analyzing the current methods to alleviate the problem is discussed in this paper.
 		 Calistrat, Webb API Conference 1972
The Evolution Of Gear Spindles New processes for grinding carburized gear spindles to optimize tooth contact thereby increasing capacity and life by 30-75% over traditional design. Also the evolution of design, material, heat treatment and process in gear spindle technology is discussed.
 		 Mancuso, Zilberman ASME DETC2000/PTG14454 2000