Angular Contact Ball Bearing Modelling with Flexible Cage PDF Download
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Author: Karine Petuya Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
Angular Contact Ball Bearings are widely used in aerospace industry because of their ability to work at high-speed and to support important loads. Depending on operating conditions, kinematic and dynamic behaviours are complex and bearing design optimisation is essential. That is why this study aims at continuing Leblanc and Nelias' quasi-static model with balls and rings. Difficulty of this model lies in the fact that up to four ball-race contact points are considered. As well, all balls degrees of freedom are calculated without making any kinematic assumption. Then, one of the purpose of this thesis is to improve computation of friction forces, EHD lubrication and kinematics at each point of contact ellipse. The model is also harmonized in order to get a single system of equations that better deals with numerical discontinuities due to contact changes. Solutions are proposed to extend operating conditions at lower speeds and higher radial loads or misalignments. Besides, aeronautical industry is currently developing ball bearings with cages made of lighter but softer materials. Such bearings experience cage deformation and stress concentration due to ball-to-pocket impacts. These are produced during acceleration and deceleration phases or during cruise when operating with combined thrust and radial load. That is why this study aims, in a second time, at adding cage into the quasi-static model. Ball-to-pocket and cage-race interactions are considered as well as global and local cage elasticity in three dimensions. Finally, the whole system is transposed in dynamics in order to be solved over time and to consider acceleration components. For various operating conditions, ball kinematics, ball-race interactions, cage center motion, cage local and global deformations are analysed. Model validation is done by comparison with existing models or with experimental results found in literature.
Author: Karine Petuya Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
Angular Contact Ball Bearings are widely used in aerospace industry because of their ability to work at high-speed and to support important loads. Depending on operating conditions, kinematic and dynamic behaviours are complex and bearing design optimisation is essential. That is why this study aims at continuing Leblanc and Nelias' quasi-static model with balls and rings. Difficulty of this model lies in the fact that up to four ball-race contact points are considered. As well, all balls degrees of freedom are calculated without making any kinematic assumption. Then, one of the purpose of this thesis is to improve computation of friction forces, EHD lubrication and kinematics at each point of contact ellipse. The model is also harmonized in order to get a single system of equations that better deals with numerical discontinuities due to contact changes. Solutions are proposed to extend operating conditions at lower speeds and higher radial loads or misalignments. Besides, aeronautical industry is currently developing ball bearings with cages made of lighter but softer materials. Such bearings experience cage deformation and stress concentration due to ball-to-pocket impacts. These are produced during acceleration and deceleration phases or during cruise when operating with combined thrust and radial load. That is why this study aims, in a second time, at adding cage into the quasi-static model. Ball-to-pocket and cage-race interactions are considered as well as global and local cage elasticity in three dimensions. Finally, the whole system is transposed in dynamics in order to be solved over time and to consider acceleration components. For various operating conditions, ball kinematics, ball-race interactions, cage center motion, cage local and global deformations are analysed. Model validation is done by comparison with existing models or with experimental results found in literature.
Author: Jianrong Tan Publisher: Springer Nature ISBN: 9811673810 Category : Technology & Engineering Languages : en Pages : 2373
Book Description
This book focus on innovation, main objectives are to bring the community of researchers in the fields of mechanical design together; to exchange and discuss the most recent investigations, challenging problems and new trends; and to encourage the wider implementation of the advanced design technologies and tools in the world, particularly throughout China. The theme of 2021 ICMD is “Interdisciplinary and Design Innovation” and this conference is expected to provide an excellent forum for cross-fertilization of ideas so that more general, intelligent, robust and computationally economical mechanical design methods are created for multi-disciplinary applications.
Author: Peter Childs Publisher: Elsevier ISBN: 0443220786 Category : Technology & Engineering Languages : en Pages : 882
Book Description
Mechanical Design Engineering Handbook, Third Edition discusses the mechanical engineering skills that are essential to power generation, production, and transportation. Machine elements such as bearings, shafts, gears, belts, chains, clutches and belts represent fundamental building blocks for a wide range of technology applications. The aim of this handbook is to present an overview of the design process and to introduce the technology and selection of specific machine elements that are fundamental to a wide range of mechanical engineering design applications. This book includes detailed worked examples for the design and application of machine elements and over 600 images, with line drawings complemented by solid model illustrations to aid understanding of the machine elements and assemblies concerned. The context for engineering and mechanical design is introduced in the first chapter, which also presents a blended design process, incorporating principles from systematic and holistic design, as well as practical project management. - Provides a comprehensive treatment of machine elements, including bearings, gears, shafts, clutches, brakes, belts, chains, springs, wire rope, hydraulics, and pneumatics - Presents the design and selection of flow charts - Includes over 600 illustrations, presenting the technologies and their implementation - Covers detailed, worked examples throughout
Author: Tedric A. Harris Publisher: CRC Press ISBN: 1420006592 Category : Technology & Engineering Languages : en Pages : 392
Book Description
Part of the fifth edition of the classic Rolling Bearing Analysis, this book builds a basic understanding of the fundamentals underlying the use, design, and performance of rolling bearings. It serves as a stand-alone introduction cutting across the array of disciplines necessary to evaluate and comprehend the performance and behavior of all types of rolling bearings. The authors derive the mathematics and theories underlying catalog values given by manufacturers and lead you from the various types of bearings through bearing geometry, applied loading, internal load distribution, deformation, functional performance, and structural materials. It makes an ideal introductory textbook as well as a practical field reference for professionals.
Author: Karine Petuya
Author: Karine Petuya
Author: Jianrong Tan
Author: Rajiv Tiwari
Author: Andrew D. Ball
Author: Tongtong Liu
Author: 
Author: Elizabeth S. Armstrong
Author: Peter Childs
Author: Tedric A. Harris
Author: Lester J. Nypan