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Generation And Computerized Simulation Of Meshing And Contact Of Modified Involute Helical Gears
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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 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 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 Modified Involute Helical Gears: Computerized Design, Simulation of Meshing and Stress Analysis by :
Download or read book Modified Involute Helical Gears: Computerized Design, Simulation of Meshing and Stress Analysis written by and published by . This book was released on 2003 with total page 66 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.
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.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722123307 Total Pages :24 pages Book Rating :4.1/5 (233 download)
Book Synopsis Computerized Simulation of Meshing of Conventional Helical Involute Gears and Modification of Geometry by : National Aeronautics and Space Administration (NASA)
Download or read book Computerized Simulation of Meshing of Conventional Helical Involute Gears and Modification of Geometry written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07 with total page 24 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. Litvin, F. L. and Lu, J. and Townsend, D. P. and Hawkins, M. Glenn Research Center NAG3-1822; RTOP 581-30-13; DA Proj. 1L1-62211-A-47-A...
Book Synopsis Computerized Design and Generation of Low-Noise Helical Gears with Modified Surface Topology by :
Download or read book Computerized Design and Generation of Low-Noise Helical Gears with Modified Surface Topology written by and published by . This book was released on 1994 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: An approach for design and generation of low-noise helical gears with localized bearing contact is proposed. The approach is applied to double circular arc helical gears and modified involute helical gears. The reduction of noise and vibration is achieved by application of a predesigned parabolic function of transmission errors that is able to absorb a discontinuous linear function of transmission errors caused by misalignment. The localization of the bearing contact is achieved by the mismatch of pinion-gear tooth surfaces. Computerized simulation of meshing and contact of the designed gears demonstrated that the proposed approach will produce a pair of gears that has a parabolic transmission error function even when misalignment is present. Numerical examples for illustration of the developed approach are given.
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 Computerized Simulation of Meshing of Conventional Helical Involute Gears and Modification of Geometry by : Faydor L. Litvin
Download or read book Computerized Simulation of Meshing of Conventional Helical Involute Gears and Modification of Geometry written by Faydor L. Litvin and published by . This book was released on 1997 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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 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... AD-A330099... APR. 7, 1998 by : United States. National Aeronautics and Space Administration
Download or read book COMPUTERIZED SIMULATION OF MESHING OF CONVENTIONAL HELICAL INVOLUTE GEARS AND MODIFICATION OF GEOMETRY... AD-A330099... APR. 7, 1998 written by United States. National Aeronautics and Space Administration and published by . This book was released on 1999* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781723822124 Total Pages :58 pages Book Rating :4.8/5 (221 download)
Book Synopsis Computerized Generation and Simulation of Meshing and Contact of New Type of Novikov-Wildhaber Helical Gears by : National Aeronautics and Space Adm 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 Adm Nasa and published by Independently Published. This book was released on 2018-09-19 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. 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 Simulation of Conditions of Meshing and Bearing Contact of Involute Helical Gears by : Jong Kil Lee
Download or read book Simulation of Conditions of Meshing and Bearing Contact of Involute Helical Gears written by Jong Kil Lee and published by . This book was released on 1984 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Topology of Modified Helical Gears and Tooth Contact Analysis (TCA) Program by : Faydor L. Litvin
Download or read book Topology of Modified Helical Gears and Tooth Contact Analysis (TCA) Program written by Faydor L. Litvin and published by . This book was released on 1989 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: The contents of ths report covers: (i) development of optimal geometry for crowned helical gears; (ii) method for their generation; (iii) tooth contact analysis (TCA) computer programs for the analysis of meshing and bearing contact and guarantee the favorable shape and low level of the transmission errors. Two new methods for generation of the crowned helical pinion surface have been proposed. One is based on application of the tool with a surface of revolution that slightly deviates from a regular cone surface. The tool can be used as a grinding wheel or as a shaver. The other is based on crowning pinion tooth surface with predesigned transmission errors. The pinion tooth surface can be generated by a computer controlled automatic grinding machine. The TCA program simulates the meshing and bearing contract of misaligned gears. The transmission errors are also determined. Keywords: Helical gears; Crowned gears; Gear geometry; Tooth contact analysis. (JES).
