Solving tribology problems in rotating machines

Author(s)

• Prashad, Har

Bibliographic Information

Solving tribology problems in rotating machines

H. Prashad

（Woodhead Publishing in mechanical engineering）

CRC Press , Woodhead Pub, 2006

• : uk
• : us

Note

Includes bibliographical references and index

Description and Table of Contents

Volume

: us ISBN 9780849392092

Description

Bearings are widely used in rotating machines. Understanding the factors affecting their reliability and service life is essential in ensuring good machine design and performance. Solving Tribology Problems in Rotating Machines reviews these factors and their implications for improved machine performance. The first two chapters review ways of assessing the performance and reliability of rolling-element bearings. The author then goes on to discuss key performance problems and the factors affecting bearing reliability. There are chapters on cage and roller slip, and particular types of failure in equipment such as alternators, condensers and pumps. The author also reviews the effects of such factors as localised electrical currents, seating, clearance, grades of lubricant, axial forces, vibration on performance and service life. The book concludes by reviewing ways of improving bearing design. Solving Tribology Problems in Rotating Machines will be an essential reference for engineers involved in the design and operation of rotating machines in such sectors as power generation, electrical and automotive engineering.

Table of Contents

Reliability Analysis of Rolling-Element Bearings A General Review Introduction Detection of Bearing Malfunction and Determination of Defect Frequencies Resonant Frequencies Experimental Procedure Instrumentation Details and Techniques Determination of Defect Frequencies and Energy Levels Results and Discussion Conclusions and Recommendations References Nomenclature Functional Performance of Rolling-Element Bearings for Acceptance in Routine Applications A General Review Introduction Bearing Test Philosophy Bearing Test Machine Experimental Procedure Data Deduction Results and Discussion Overall Vibration levels of Bearings Predicted Life of Bearings Comparison of Performance of Bearings Conclusions and Recommendation References Cage and Roller Slip of Rolling-Element Bearings A General Review Introduction Characteristic Defect Frequencies Experimental Procedure Spectral Analysis Technique Determination of Defect Frequencies and Energy Levels Results and Discussion Comparison of Bearings Conclusions References Appendix Nomenclature Diagnosis and Cause Analysis of Rolling-Elements Bearings Failure in Electric Power Equipments A General Review Introduction Bearing Arrangement and Nature of Bearing Failure Investigations, Observation of Failures and Data Collection Results and Discussion Conclusions References Localized Electrical Current in Rolling-Element Bearings A General Review Introduction Bearing Arrangement and Nature of Bearing Failure Investigations, Observations and Data Collection Theoretical Model and Approach to Determine the Flow of Localized Current in a Bearing Field Strength on Track Surfaces of Races and Rolling-Elements Magnetic Flux Density Determination of Time Span for the Appearance of Flutes on Track Surfaces Data deduction Results and Discussion Conclusions References Nomenclature Response and Performance of a Rolling - Element Bearing Under the Influence of Electric Current A General Review Introduction Behaviour of Greases in Non-Insulated Bearings Effect of Current on Formation of Corrugated Pattern on Roller Track of Races of Roller Bearings The Effect of Current Leakage on Electro Adhesion Forces in Rolling Friction and Magnetic Flux Density Distribution on Bearing Surfaces Effect of Operating Parameters on the Threshold Voltages and Impedance Response of Non-Insulated Rolling-Element Bearings Impedance, Capacitance and Charge Accumulation on Roller Bearings Contact Temperature, Contact Stresses and Slip Bands Initiation on Roller Track of Races Effects of Instantaneous Charge Leakage on Roller Tracks of Roller Bearings Lubricated with High Resistivity Lubricants Capacitive Effects of Roller Bearings on Repeated Starts and Stops of a Machine Mechanism of Bearing Failures Conclusion References Nomenclature The Effect of Oil Grades and Clearance Ratios on Reliability of Cylindrical Hydrodynamic Bearings A General Review Introduction Background Theoretical Evaluation of Viscosity Coefficients Determination of Viscosity Integral Assessment of Bearing Performance Effect of Oil Grades on Temperature-Rise and Safe Load-Carrying Capacity of Bearings Bearing Turbulence and Transition Speed Results and Discussion Conclusions and Recommendation References Nomenclature Spherical Seating of Hydrodynamic Journal Bearings A General Review Introduction Theoretical Basis of the Simplified Design Methodology Evaluation of Minimum Values of Constant of Moment of Friction and Optimum Values of the Design Parameters of Spherical Seating Functional Nomographs for Evaluation of Optimum Values of Design Parameters of Spherical Seating Guidelines for Choosing the Optimum Values of Design Parameters of Spherical Seating Conclusions and Recommendation References Nomenclature Life Estimation of Turbine Oils -- A Methodology and Criterion for Their Acceptance / Rejection A General Review Introduction Experimental Investigations Data deduction Results and Discussion Conclusions and Recommendation References Annexure-1 Axial Force on Motor Bearings - A Tool for Performance Evaluation A General Review Introduction Axial force Measurement Technique Experimental Determination of Axial Force Results and Discussion Conclusions and Future Studies Bibliography An Analysis of the Progressive Increase in Vibration of a Large Synchronous Electric Motor A General Review Introduction Possible Sources of Vibrations Diagnosis of Causes of Vibrations System design, Bearing Assembly and Characteristic Features of the Synchronous Motor Under Investigation Investigations and Analysis Results and Discussion Conclusions and Recommendation References A Study of the Causes of Failure of Rolling Element Bearings in Alternators A general review Introduction Design Features of the Alternators Nature of Bearing Failure Data collection and Investigations Causes of Shaft Voltages and Flow of Current Through Bearings Results and Discussions Conclusions and Recommendation References The Diagnosis of the Cause of Bearing Problem in a Synchronous Condenser A general review Introduction Technical Details of Synchronous Condenser Experimental Procedure Measurement Obtained Theoretical Comparison of Theoretical and Experimental Data Results and Discussion Conclusions References Nomenclature The Cause of Noise at the Top Bearings of Vertical Pump - Motor Sets Introduction Sump Layout and Construction System Layout System Behavior Factors Causing the Unusual System Behavior Vibration Spectra and Analysis Data deduction and Discussions Design of Bearing Used and Its Significance Explanation of the Cause of Noise at the Motor Top Bearing Conclusions and Recommendations Bibliography Modifications to the Design and Bearings of Horizontal - Axis Windmills Used for Pumping Water, to Achieve Trouble Free Reliable Operation A general review Introduction Design Features Operational Philosophy Transmission System The Bearings and the Performance of the Reciprocating Pump Recommendations Conclusions References Magnetic Suspension Bearings for A.C. Energy Meters A General Review Introduction Design Consideration Mechanical Requirements Typical Construction Frictional Torque Studies Conclusions and Discussion Bibliography A New-Generation of Rolling Element Bearing with an Outline of its Performance Advantages A General Review Introduction Basic Concept and Principle of Operation of DDHPB Theoretical Analysis Theory Behind Performance Evaluation of Bearings Design and Test Conditions of the DDHPB Bearing Test Set-Up and Experimental Details for Testing DDHPB Vis -a -Vis Conventional Bearings Data Deduction Results and Discussion Brief Summary of the Published Papers on DDHPB Conclusions References Nomenclature

Volume

: uk ISBN 9781845691103

Description

Bearings are widely used in rotating machines. Understanding the factors affecting their reliability and service life is essential in ensuring good machine design and performance. Solving tribology problems in rotating machines reviews these factors and their implications for improved machine performance.The first two chapters review ways of assessing the performance and reliability of rolling-element bearings. The author then goes on to discuss key performance problems and the factors affecting bearing reliability. There are chapters on cage and roller slip, and particular types of failure in equipment such as alternators, condensers and pumps. The author also reviews the effects of such factors as localised electrical currents, seating, clearance, grades of lubricant, axial forces, vibration on performance and service life. The book concludes by reviewing ways of improving bearing design.Solving tribology problems in rotating machines is an essential reference for engineers involved in the design and operation of rotating machines in such sectors as power generation, electrical and automotive engineering.

Table of Contents

• Reliability analysis of rolling-element bearings
• Functional performance of rolling-element bearings for acceptance in routine applications
• Cage and roller slip of rolling-element bearings
• Diagnosis and cause analysis of rolling-elements bearings failure in electric power equipments
• Localized electrical current in rolling-element bearings
• Response and performance of a rolling - element bearing under the influence of electric current
• The effect of oil grades and clearance ratios on reliability of cylindrical hydrodynamic bearings
• Spherical seating of hydrodynamic journal bearings
• Life estimation of turbine oils - a methodology and criterion for their acceptance / rejection
• Axial force on motor bearings - a tool for performance evaluation
• An analysis of the progressive increase in vibration of a large synchronous electric motor
• A study of the causes of failure of rolling element bearings in alternators
• The diagnosis of the cause of bearing problem in a synchronous condenser
• The cause of noise at the top bearings of vertical pump - motor sets
• Modifications to the design and bearings of horizontal - axis windmills used for pumping water, to achieve trouble free reliable operation
• Magnetic suspension bearings for A.C. energy meters
• A new-generation of rolling element bearing with an outline of its performance advantages.

by "Nielsen BookData"

Details

• NCID: BB01175317
• ISBN:
  • 9781845691103
  • 0849392098
• Country Code: us
• Title Language Code: eng
• Text Language Code: eng
• Place of Publication: Boca Raton, Fla,Cambridge, England
• Pages/Volumes: xvi, 247 p.
• Size: 25 cm
• Classification:
  • DC22 : 621.822
• Subject Headings:
  • LCSH : Tribology
  • LCSH : Bearings (Machinery)
  • LCSH : Lubrication and lubricants
• Parent Bibliography ID:
  • BA78367200