Face Gear Drive with Spur Involute Pinion: Geometry, Generation by a Worm, Stress Analysis PDF Download
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Author: Publisher: ISBN: Category : Languages : en Pages : 52
Book Description
A face gear drive with a spur involute pinion is considered. The generation of the face gear is based on application of a grinding or cutting worm whereas the conventional method of generation is based on application of an involute shaper. An analytical approach for determination of: (1) the worm thread surface, (2) avoidance of singularities of the worm thread surface, (3) dressing of the worm, and (4) determination of stresses of the face-gear drive, is proposed. A computer program for simulation of meshing and contact of the pinion and face-gear has been developed. Correction of machine-tool settings is proposed for reduction of the shift of the bearing contact caused by misalignment. An automatic development of the model of five contacting teeth has been proposed for stress analysis. Numerical examples for illustration of the developed theory are provided.
Author: Publisher: ISBN: Category : Languages : en Pages : 52
Book Description
A face gear drive with a spur involute pinion is considered. The generation of the face gear is based on application of a grinding or cutting worm whereas the conventional method of generation is based on application of an involute shaper. An analytical approach for determination of: (1) the worm thread surface, (2) avoidance of singularities of the worm thread surface, (3) dressing of the worm, and (4) determination of stresses of the face-gear drive, is proposed. A computer program for simulation of meshing and contact of the pinion and face-gear has been developed. Correction of machine-tool settings is proposed for reduction of the shift of the bearing contact caused by misalignment. An automatic development of the model of five contacting teeth has been proposed for stress analysis. Numerical examples for illustration of the developed theory are provided.
Author: National Aeronautics and Space Administration (NASA) Publisher: Createspace Independent Publishing Platform ISBN: 9781720521433 Category : Languages : en Pages : 62
Book Description
A new type of face-gear drive with intersected axes of rotation formed by a helical involute pinion and conjugated face-gear has been investigated. Generation of face-gears by a shaper free of undercutting and pointing has been investigated. A new method of grinding or cutting of face-gears by a worm of special shape has been developed. A computerized design procedure has been developed to avoid undercutting and pointing by a shaper or by a generating worm. Also, a method to determine the limitations of the helix angle magnitude has been developed. The method provides a localization of the bearing contact to reduce the shift of bearing contact caused by misalignment. The analytical method provides a simulation of the meshing and contact of misaligned gear drives. An automatic mesh generation method has been developed and used to conduct a 3D contact stress analysis of several teeth. The theory developed is illustrated with several examples.Litvin, Faydor L. and Fuentes, Alfonso and Gonzalez-Perez, Ignacio and Piscopo, Alessandro and Ruzziconi, PaoloGlenn Research CenterSHAPERS; GEAR TEETH; TRANSMISSIONS (MACHINE ELEMENTS); STRESS ANALYSIS; SINGULARITY (MATHEMATICS); HELICES; MECHANICAL ENGINEERING; AXES OF ROTATION; COMPUTER SYSTEMS DESIGN; CONJUGATION; MISALIGNMENT; POSITION (LOCATION); MECHANICAL DRIVES; HELICOPTERS; GRID GENERATION (MATHEMATICS)
Author: Faydor L. Litvin Publisher: ISBN: Category : Gearing Languages : en Pages : 108
Book Description
The use of face gears in power transmission and drive systems has a significant number of benefits. Face gears allow a variety of new transmission arrangements as well as high reduction ratio capability. This leads to drive system weight reduction and improvements in performance. In this work, basic information about the design and analysis of face gear drives is presented. The work considers face gears in mesh with spur involute pinions for both intersecting axes and offset drives. Tooth geometry, kinematics, generation of face gears with localized bearing contact by cutting and grinding, avoidance of tooth undercutting, avoidance of tooth pointing, tooth contact analysis, and algorithms for the simulation of meshing and contact are all topics which are discussed. In addition, applications of face gear drives are presented. Included are design uses in aerospace applications such as helicopter transmissions, split-torque face gear arrangements, comparisons of face gears with bevel gears, and general design considerations.
Author: Publisher: ISBN: Category : Languages : en Pages : 46
Book Description
New geometry of face worm gear drives with conical and cylindrical worms is proposed. The generation of the face worm-gear is based on application of a tilted head-cutter (grinding tool) instead of application of a hob applied at present. The generation of a conjugated worm is based on application of a tilted head-cutter (grinding tool) as well. The bearing contact of the gear drive is localized and is oriented longitudinally. A predesigned parabolic function of transmission errors for reduction of noise and vibration is provided. The stress analysis of the gear drive is performed using a three-dimensional finite element analysis. The contacting model is automatically generated. The developed theory is illustrated with numerical examples.
Author: Publisher: ISBN: Category : Languages : en Pages : 38
Book Description
A new type of face gear drive for application in transmissions, particularly in helicopters, has been developed. The new geometty differs from the existing geometry by application of asymmetric profiles and double-crowned pinion of the face gear mesh. The paper describes the computerized design, simulation of meshing and contact, and stress analysis by finite element method. Special purpose computer codes have been developed to conduct the analysis. The analysis of this new type of face gear is illustrated with a numerical example.
Author: National Aeronautics and Space Administration (NASA) Publisher: Createspace Independent Publishing Platform ISBN: 9781721088621 Category : Languages : en Pages : 106
Book Description
The use of face gears in power transmission and drive systems has a significant number of benefits. Face gears allow a variety of new transmission arrangements as well as high reduction ratio capability. This leads to drive system weight reduction and improvements in performance. In this work, basic information about the design and analysis of face gear drives is presented. The work considers face gears in mesh with spur involute pinions for both intersecting axes and offset drives. Tooth geometry, kinematics, generation of face gears with localized bearing contact by cutting and grinding, avoidance of tooth undercutting, avoidance of tooth pointing, tooth contact analysis, and algorithms for the simulation of meshing and contact arc all topics which are discussed. In addition, applications of face gear drives are presented. Included are design uses in aerospace applications such as helicopter transmissions, split-torque face gear arrangements, comparisons of face gears with bevel gears, and general design considerations. Litvin, F. L. and Egelja, A. and Tan, J. and Chen, D. Y.-D. and Heath, G. Glenn Research Center NCC3-356; RTOP 581-30-13; DA Proj. 1L1-62211-A4-7A
Author: National Aeronautics and Space Adm Nasa Publisher: Independently Published ISBN: 9781723864988 Category : Science Languages : en Pages : 46
Book Description
New geometry of face worm gear drives with conical and cylindrical worms is proposed. The generation of the face worm-gear is based on application of a tilted head-cutter (grinding tool) instead of application of a hob applied at present. The generation of a conjugated worm is based on application of a tilted head-cutter (grinding tool) as well. The bearing contact of the gear drive is localized and is oriented longitudinally. A predesigned parabolic function of transmission errors for reduction of noise and vibration is provided. The stress analysis of the gear drive is performed using a three-dimensional finite element analysis. The contacting model is automatically generated. The developed theory is illustrated with numerical examples.Litvin, Faydor L. and Nava, Alessandro and Fan, Qi and Fuentes, AlfonsoGlenn Research CenterMECHANICAL DRIVES; GEARS; FABRICATION; STRESS ANALYSIS; SIMULATION; FINITE ELEMENT METHOD; VIBRATION DAMPING; NOISE REDUCTION
Author: Faydor L. Litvin Publisher: Cambridge University Press ISBN: 9780521815178 Category : Technology & Engineering Languages : en Pages : 818
Book Description
This revised, expanded edition covers the theory, design, geometry, and manufacture of all types of gears and gear drives. An invaluable reference for designers, theoreticians, students, and manufacturers, the second edition includes advances in gear theory, gear manufacturing, and computer simulation. Among the new topics are: new geometry for gears and pumps; new design approaches for planetary gear trains and bevel gear drives; an enhanced approach for stress analysis; new methods of grinding and gear shaving; and new theory on the simulation and its application. First Edition published by Pearson Education Hb (1994): 0-132-11095-4
Author: Ze Yong Yin Publisher: Trans Tech Publications Ltd ISBN: 3038135461 Category : Technology & Engineering Languages : en Pages : 945
Book Description
Volume is indexed by Thomson Reuters CPCI-S (WoS). This volume comprises a selection of 202 papers covering all of the latest advances and developments in design, modeling and analysis, materials manufacturing and testing, and their engineering applications in power transmission systems. It will provide readers with a broad overview of recent progress and achievements in the field of power transmission.
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Author: National Aeronautics and Space Administration (NASA)
Author: Faydor L. Litvin
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Author: National Aeronautics and Space Administration (NASA)
Author: National Aeronautics and Space Adm Nasa
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Author: Faydor L. Litvin
Author: Ze Yong Yin