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Computerized Generation And Simulation Of Meshing And Contact Of New Type Of Novikov Wildhaber Helical Gears
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781720450054 Total Pages :56 pages Book Rating :4.4/5 (5 download)
Book Synopsis Computerized Generation and Simulation of Meshing and Contact of New Type of Novikov-Wildhaber Helical Gears by : National Aeronautics and Space Administration (NASA)
Download or read book Computerized Generation and Simulation of Meshing and Contact of New Type of Novikov-Wildhaber Helical Gears written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-29 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this report, we propose a new geometry for low-noise, increased-strength helical gears of the Novikov-Wildhaber type. Contact stresses are reduced as a result of their convex-concave gear tooth surfaces. The gear tooth surfaces are crowned in the profile direction to localize bearing contact and in the longitudinal direction to obtain a parabolic function of transmission errors. Such a function results in the reduction of noise and vibrations. Methods for the generation of the proposed gear tooth surfaces by grinding and hobbing are considered, and a tooth contact analysis (TCA) computer program to simulate meshing and contact is applied. The report also investigates the influence of misalignment on transmission errors and shift of bearing contact. Numerical examples to illustrate the developed approaches are proposed. The proposed geometry was patented by Ford/UIC (Serial Number 09-340-824, pending) on June 28, 1999.Litvin, Faydor L. and Feng, Pin-Hao and Lagutin, Sergei A.Glenn Research CenterCOMPUTERIZED SIMULATION; GEAR TEETH; GEARS; GEOMETRY; TECHNOLOGY UTILIZATION; NOISE REDUCTION; VIBRATION DAMPING
Book Synopsis Computerized Generation and Simulation of Meshing and Contact of New Type of Novikov-Wildhaber Helical Gears by :
Download or read book Computerized Generation and Simulation of Meshing and Contact of New Type of Novikov-Wildhaber Helical Gears written by and published by . This book was released on 2000 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this report, we propose a new geometry for low-noise, increased-strength helical gears of the Novikov- Wildhaber type. Contact stresses are reduced as a result of their convex-concave gear tooth surfaces. The gear tooth surfaces are crowned in the profile direction to localize bearing contact and in the longitudinal direction to obtain a parabolic function of transmission errors. Such a function results in the reduction of noise and vibrations. Methods for the generation of the proposed gear tooth surfaces by grinding and hobbing are considered, and a tooth contact analysis (TCA) computer program to simulate meshing and contact is applied. The report also investigates the influence of misalignment on transmission errors and shift of bearing contact. Numerical examples to illustrate the developed approaches are proposed.
Book Synopsis Novikov/Conformal Gearing by : Stephen P. Radzevich
Download or read book Novikov/Conformal Gearing written by Stephen P. Radzevich and published by Springer Nature. This book was released on 2022-11-14 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the latest accomplishments in Novikov/conformal gearing as well as high-conformal gearing. It is focused primarily on strength calculation of gear teeth and the manufacturing of gears for Novikov/conformal and high-conformal gearing along with a brief discussion of achievements in the modern theory of gearing. The modern theory of gearing is the foundation of all optimal designs of gears, gear-sets, and transmissions of all known designs, as well as, of all those to be developed in the future. As even a small improvement in efficiency on a single gear can represent a significant cost saving, given the millions of gears used in industry every year, this volume provides the design and manufacturing engineer in invaluable resource.
Book Synopsis Computerized Generation and Simulation of Meshing of Modified Spur and Helical Gears Manufactured by Shaving by :
Download or read book Computerized Generation and Simulation of Meshing of Modified Spur and Helical Gears Manufactured by Shaving written by and published by . This book was released on 2001 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modification of geometry of spur and helical gears with parallel axes and helical gears with crossed axes is proposed. The finishing process of gear generation is shaving. The purposes of modification of the gear geometry are to localize and stabilize the bearing contact, and to reduce noise and vibration. The goals mentioned above are achieved by using profile crowning and plunging the shaver by a prescribed motion during pinion generation. The pinion becomes double crowned. The gear member is generated as a conventional involute gear. A tooth contact analysis (TCA) program for simulation of meshing and contact was developed and the analysis is illustrated with TCA results for spur and helical gears.
Book Synopsis Gear Geometry and Applied Theory by : Faydor L. Litvin
Download or read book Gear Geometry and Applied Theory written by Faydor L. Litvin and published by Cambridge University Press. This book was released on 2004-09-06 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt: This revised, expanded, edition covers the theory, design, geometry and manufacture of all types of gears and gear drives. This is an invaluable reference for designers, theoreticians, students, and manufacturers. This edition includes advances in gear theory, gear manufacturing, and computer simulation. Among the new topics are: 1. New geometry for modified spur and helical gears, face-gear drives, and cycloidal pumps. 2. New design approaches for one stage planetary gear trains and spiral bevel gear drives. 3. An enhanced approach for stress analysis of gear drives with FEM. 4. New methods of grinding face gear drives, generating double crowned pinions, and improved helical gear shaving. 5. Broad application of simulation of meshing and TCA. 6. New theories on the simulation of meshing for multi-body systems, detection of cases wherein the contact line on generating surfaces may have its own envelope, and detection and avoidance of singularities of generated surfaces.
Book Synopsis High-Conformal Gearing by : Stephen Radzevich
Download or read book High-Conformal Gearing written by Stephen Radzevich and published by Elsevier. This book was released on 2020-07-04 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: The new edition of High-Conformal Gearing continues to address the kinematics and the geometry of conformal (Novikov) gearing and high-conformal gearing. The book deals with gears that feature convex-to-concave contact of the tooth flanks of a gear and a mating pinion. Gears of this type are commonly referred to as conformal gearings. Novikov gearing is the most widely known example of conformal gearing. The helical gearing by Wildhaber, Bramley-Moore (otherwise known as the Vivkers, Bostock, and Bramley gearing, or just V.B.B.-gearing), are well-known designs of gearing that are loosely referred to as conformal gearing. The principal differences between conformal gearing as well as high-conformal gearing and Wildhaber helical gearing are outlined. It also shows that Wildhaber helical gearing from one side, and Novikov gearing from another side, are two completely different gear systems that cannot be combined into a common gear system. This book aids mechanical, automotive, and robotics engineers specializing in gear design with successfully transmitting a rotation. It also serves as a resource for graduate students taking advanced courses in gear design. Discusses the kinematics and geometry of conformal and high-conformal gearing Provides a specific set of conditions which need to be met when designing conformal and high-conformal gears Outlines the principal differences between conformal, high-conformal and Wildhaber helical gearing
Book Synopsis Theory and Practice of Gearing and Transmissions by : Veniamin Goldfarb
Download or read book Theory and Practice of Gearing and Transmissions written by Veniamin Goldfarb and published by Springer. This book was released on 2015-08-26 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together papers from all spheres of mechanical engineering related to gears and transmissions, from fundamentals to advanced applications, from academic results in numerical and experimental research, to new approaches to gear design and aspects of their optimization synthesis and to the latest developments in manufacturing. Furthermore, this volume honours the work of Faydor L. Litvin on the 100th anniversary of this birth. He is acknowledged as the founder of the modern theory of gearing. An exhaustive list of his contributions and achievements and a biography are included.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722416652 Total Pages :76 pages Book Rating :4.4/5 (166 download)
Book Synopsis Generation and Computerized Simulation of Meshing and Contact of Modified Involute Helical Gears by : National Aeronautics and Space Administration (NASA)
Download or read book Generation and Computerized Simulation of Meshing and Contact of Modified Involute Helical Gears written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-07 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design and generation of modified involute helical gears that have a localized and stable bearing contact, and reduced noise and vibration characteristics are described. The localization of the bearing contact is achieved by the mismatch of the two generating surfaces that are used for generation of the pinion and the gear. The reduction of noise and vibration will be achieved by application of a parabolic function of transmission errors that is able to absorb the almost linear function of transmission errors caused by gear misalignment. The meshing and contact of misaligned gear drives can be analyzed by application of computer programs that have been developed. The computations confirmed the effectiveness of the proposed modification of the gear geometry. A numerical example that illustrates the developed theory is provided. Litvin, Faydor L. and Chen, Ningxin and Lu, Jian Unspecified Center...
Book Synopsis Computerized Design, Generation, and Simulation of Meshing and Contact of Face-Milled Formate Cut Spiral Bevel Gears by :
Download or read book Computerized Design, Generation, and Simulation of Meshing and Contact of Face-Milled Formate Cut Spiral Bevel Gears written by and published by . This book was released on 2001 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new approach for design, generation, and computerized simulation of meshing and contact of face-milled, formate cut spiral bevel gears is presented. The purpose is to develop a low noise, stabilized bearing contact for this type of gear drives. The approach proposed is based on application of three procedures that permit in sequence, to provide a longitudinally directed bearing contact, a predesigned parabolic function of transmission errors and limit the shift of bearing contact caused by errors of alignment. The theory developed is illustrated with an example of design and computation.
Book Synopsis Generation and Computerized Simulation of Meshing and Contact of Modified Involute Helical Gears by : Faydor L. Litvin
Download or read book Generation and Computerized Simulation of Meshing and Contact of Modified Involute Helical Gears written by Faydor L. Litvin and published by . This book was released on 1995 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781720629924 Total Pages :68 pages Book Rating :4.6/5 (299 download)
Book Synopsis Modified Involute Helical Gears by : National Aeronautics and Space Administration (NASA)
Download or read book Modified Involute Helical Gears written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-03 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: The computerized design, methods for generation, simulation of meshing, and enhanced stress analysis of modified involute helical gears is presented. The approaches proposed for modification of conventional involute helical gears are based on conjugation of double-crowned pinion with a conventional helical involute gear. Double-crowning of the pinion means deviation of cross-profile from an involute one and deviation in longitudinal direction from a helicoid surface. Using the method developed, the pinion-gear tooth surfaces are in point-contact, the bearing contact is localized and oriented longitudinally, and edge contact is avoided. Also, the influence of errors of alignment on the shift of bearing contact, vibration, and noise are reduced substantially. The theory developed is illustrated with numerical examples that confirm the advantages of the gear drives of the modified geometry in comparison with conventional helical involute gears.Glenn Research CenterCOMPUTER AIDED DESIGN; GEARS; STRESS ANALYSIS; COMPUTERIZED SIMULATION; VIBRATION
Book Synopsis Computerized Design and Generation of Low-noise Gears with Localized Bearing Contact by :
Download or read book Computerized Design and Generation of Low-noise Gears with Localized Bearing Contact written by and published by . This book was released on 1995 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computerized Simulation of Meshing of Conventional Helical Involute Gears and Modification of Geometry by :
Download or read book Computerized Simulation of Meshing of Conventional Helical Involute Gears and Modification of Geometry written by and published by . This book was released on 1997 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: An approach is proposed for computerized simulation of meshing of aligned and misaligned involute helical gears. Algorithms for TCA (Tooth Contact Analysis) computer programs were developed. Influence of misalignment on the shift of the bearing contact and transmission errors has been investigated. Numerical examples that illustrate the developed theory are provided.
Book Synopsis Helical Gears with Circular Arc Teeth: Generation, Geometry, Precision and Adjustment to Errors, Computer Aided Simulation of Conditions of Meshing and Bearing Contact by : Faydor L. Litvin
Download or read book Helical Gears with Circular Arc Teeth: Generation, Geometry, Precision and Adjustment to Errors, Computer Aided Simulation of Conditions of Meshing and Bearing Contact written by Faydor L. Litvin and published by . This book was released on 1987 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors have proposed a method for generation of circular arc helical gears which is based on application of standard equipment, worked out all aspects of the geometry of gears, proposed methods for the computer aided simulation of conditions of meshing and bearing contact, investigated the influence of manufacturing and assembly errors, and proposed methods for the adjustment of gears to these errors. The results of computer aided solutions are illustrated with computer graphics.
Book Synopsis New Methods for Improved Double Circular-Arc Helical Gears by : Faydor L. Litvin
Download or read book New Methods for Improved Double Circular-Arc Helical Gears written by Faydor L. Litvin and published by . This book was released on 1997 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors have extended the application of double circular-arc helical gears for internal gear drives. The geometry of the pinion and gear tooth surfaces has been determined. The influence of errors of alignment on the transmission errors and the shift of the bearing contact have been investigated. Application of a predesigned parabolic function for the reduction of transmission errors was proposed. Methods of grinding of the pinion-gear tooth surfaces by a disk-shaped tool and a grinding worm were proposed.
Book Synopsis Computerized Design, Generation, Simulation of Meshing and Contact, and Stress Analysis of Formate Cut Spiral Bevel Gear Drives by :
Download or read book Computerized Design, Generation, Simulation of Meshing and Contact, and Stress Analysis of Formate Cut Spiral Bevel Gear Drives written by and published by . This book was released on 2003 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new approach for design, generation, computerized simulation of meshing and contact, and stress analysis of formate cut spiral bevel gear drives is reported. The approach proposed is based on application of four procedures that permit in sequence to provide a longitudinally directed bearing contact, a predesigned parabolic function of transmission errors, a limit to the shift of bearing contact caused by errors of alignment, and to automatically generate the finite element models for application of a general purpose finite element analysis computer program. A new computer program has been developed that provides optimized machine-tool settings for finishing of spiral bevel gears utilizing the "Formate" grinding process with minimized transmission errors. The new computer program is based on the four procedures mentioned above. The developed theory is illustrated with several examples of design and computations.
Book Synopsis Helical Gears with Circular Arc Teeth by : Faydor L. Litvin
Download or read book Helical Gears with Circular Arc Teeth written by Faydor L. Litvin and published by . This book was released on 1987 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
