Dissertation > Excellent graduate degree dissertation topics show

Research on Cylindrical Roller Bearing Crown and Mechanical Property

Author: WangHaiLiang
Tutor: ChenGuanCi
School: Dalian University of Technology
Course: Mechanical and Electronic Engineering
Keywords: Cylindrical Roller Bearing Crowned Roller Contact Analysis MechanicalProperty
CLC: TH133.332
Type: Master's thesis
Year: 2013
Downloads: 58
Quote: 0
Read: Download Dissertation

Abstract


This work is supported by the National Natural Science Funds of China (Grant number.51005031).In general, the cylindrical roller bearing are used heavy-load and high-precision working condition. Failure is easily occurred in cylindrical roller bearing for excessive pressure peak at the end of rolling element, which is called’edge loading’. Therefore, the profile of the roller is designed. The crowned roller can improve stress concentrations and avoid bearing early failure. In this study, the crowned shape and size of cylindrical roller are accomplished based on contact analysis and mechanical property of the cylindrical crowned roller bearing is also researched.Firstly, a solution method for finite length cylinder contact is built with slice method. The deformable coordination of slice is established by influence coefficient method. Crowned size, contact stress and elastic approach of single roller with four common crowned profile are calculated by the mathematical model. The result is also verified by finite element method. Parameters of logarithmic profiles are optimized based on the model.Secondly, elastic approach between bearing rings and rollers with different crowned shape,size and external load are calculated. Single crowned roller’s load-elastic deformation function are got by nonlinear fitting using MATLAB software. Different crowned shape rollers’contact stiffness expression are derived based on the above function.Then, plug stiffness expressions into the bearing load distribution calculation procedure. Load distribution of the cylindrical roller bearing is got. The influence of crowned shape on load distribution of bearing with different radial clearance is analyzed, elastic approach between inner and outer ring of bearing with different crowned shape, size and external load are got. Bearing load-elastic approaching curve is drawn based on which the influence of crowned factors on bearing stiffness properties are analyzed.Finally, the contact model between tilted crowned roller and rings is established., which could be used to study influence of angle of inclination, roller profile and crowned shape on tilted contact. Dissymmetric roller profile is designed to eliminate eccentric load effect which is appeared on tilted contact and difficult to avoid. The crowned shape is made up of linear function eliminating eccentric load effect and exponential function avoiding edge loading. The contact stress distribution is improved when dissymmetric roller profile is used.

Related Dissertations

  1. Non-circular Planetary Gear Kinematics and Dynamics Simulation Based on ADAMS,TH132.41
  2. Loaded contact analysis NW planetary gear train gear modification research,TH132.41
  3. Research on Non-backlash Gear Transmission and Controllable Gear Pair,TH132.41
  4. Parameterized Design and Finite Element Analysis for Roller Beaings,TH133.33
  5. The Analysis for the Main Factor Affecting the Wear of Space Gear,TH132.41
  6. The Optimization Design and Finite Element Analysis of Cycloid Ball Planetary Reducer,TH132.46
  7. Study on Wheel/Rail Contact Problem of the High Power Locomotive,U211.5
  8. Meshing Theory and Analysis of Harmonic Transmission with 1/4 Short Flexspline for Humanoid Robot,TH132.43
  9. Contact Simulation and Experimental Study of the Wire Race Ball Bearing Based on the Nonlocal Friction,TH133.3
  10. Finite Element Analysis of Bending Stress of Face Gear Drive on the Basis of Hertz Contact Stress Distribution,TH132.41
  11. Generation of Tooth Surface and Meshing Characteristics Analysis of Helical Beveloid Gear with Parallel Axis,TH132.41
  12. Contact Analysis and Modification Research of Transimission Gear with Profile Error,TH132.41
  13. Study on the Dynamic Lubrication Characteristics of Water Lubricated Rubber Bearing,TH133.3
  14. Finite Element Analysis of Spiral Bevel Gear Based on Precise Tooth Surface Model,TH132.41
  15. Double circular spiral bevel gear tooth contact analysis,TH132.41
  16. 3D Automated Modeling and Simulation Study of Radial Honer Based on Pro/Engineer,TH132.41
  17. Research on Gear Tooth Modification and Engaging Load of Increasing Gearbox of Megawatt Wind Turbine,TH132.41
  18. Contact Mechanics Simulation and Static and Dynamic Analysis of Ball Screw,TG659
  19. Research on Load Distributions of a New Type Auxiliary Bearing,TH133.3
  20. Analysis on Engagement Characteristic and Stress of Non-orthogonal Face Gear Drive,TH132.41
  21. The Virtual Assembly and Dynamic Analysis of Planetary Reducer,TH132.46

CLC: >
© 2012 www.DissertationTopic.Net  Mobile