Dissertation > Excellent graduate degree dissertation topics show

Research and Analysis of Pitch Bearing in the Wind Turbine

Author: HuangWen
Tutor: DuJing
School: Chongqing University
Course: Mechanical Design and Theory
Keywords: Wind turbine Pitch system Pitch bearing GAP element Finite element method
CLC: TM315
Type: Master's thesis
Year: 2011
Downloads: 202
Quote: 0
Read: Download Dissertation

Abstract


Pitch bearing is one of the special bearings in the wind turbine, the performance and life of which can influnce the running and power generation efficiency of the wind turbine. Due to the pitch bearing’s large size,complex structure and loads, there is greater difficulty of design and production for the pitch bearing. The performance and fatigue life of wind turbine bearing produced in China are difficult to meet requirement. This paper analysed pitch bearing by using the modern design theorys and analysis methods,according to the Germanischer Lloyd Guideline for Certification of Wind Turbine and Euro Code.It can provide the reference for designing and producting to pitch bearing, and has theoretical and practical engineering value.Main researches covered in this paper are as follows:①The article analysed the strength of raceway of pitch bearing and area of gear contact, and described the results of analysis, meanwhile, provied the reference for the load distribution of pitch bearing.②Using the GAP element instead ball to simplify modeling for rolling bearing, comparing the results of FEA with theoretical results to confirm the correctness of simplified modeling. It provides an effective simplified modeling method for complex rolling bearing.③Analysing the fatigue life of pitch bearing’s point of maximum stress, setting the S-N curve for the meterial of pitch bearing according to the GL specification, making the conversion of fatigue load spectrum, and using the MSC.Fatigue software to calculate the total fatigue damage value of pitch bearing. This fatigue method provides a new way of thinking to calculate the bearing’life.④The article computed the strength and fatigue of the inner bolts of pitch bearing, and optimized the bolts of pitch bearing with the finite element method.The result illustrated that the strength and fatigue satisfied the requirement,the finite element method can reflect the stress distribution of bolts factually,and veritified the reasonable optimization for bolts.

Related Dissertations

  1. Research on the Structure and Characteristics of Permanent Magnetic Coupling,TH139
  2. Simulation Analysis on Temperature Stress of RCC Arch Dam and Its Construction Joints Design Research,TV642.2
  3. Grid-Side Converter Control and Wind Turbine Emulator in Direct Drive Wind Power System,TM46
  4. Stability Analysis of Roller Compacted Concrete Gravity Dam Based on Time-history Method,TV642.2
  5. Research on Intelligent Aerial Bomb for Forest Fire Fighting,S762
  6. Study of Modal Characteristics of a Car Body-in-White,U463.82
  7. Studies on Wind-induced Dynamic Response and Vibration Control of Guyed Cat-head Transmission Tower-line System,TM753
  8. Decision Design and Research on Moving-iron Linear Oscillatory Motor with Two Separated Stators,TM359.4
  9. Sensor-less Direct Torque Control of Doubly Fed Induction Wind Generator,TM315
  10. Sensitivity Analysis on Fatigue Reliability of a Turbine Disk Using Finite Element Method,V232.3
  11. Research narrower than the opening Kita highly optimized root,TU347
  12. Strength Analysis and Parameter Optimization of Single Channel Drum Dryer,TK173
  13. Structural Strength Analysis of Rotary Vane Dryer,TK173
  14. Study on Dynamic Space Structure of Groundwater on Land Use,P641.8
  15. Study on the Modification of Basalt Fiber Composites Used for Wind Turbine Blades,TB332
  16. Fatigue Analysis and Life Prediction of a Loader’s Drive Axle Housing,TH243
  17. Principle and Experiment Research of Road Simulation Test Stand for Vehicle Parts,U467.3
  18. The Fatigue Life Study of a Car Body Based on the Random Vibration,U463.82
  19. External Flow Field Numerical Simulation and Pneumatic Characteristic Analysis of Horizontal Axis Wind Turbine,TK83
  20. Fatigue Reliability Sensitivity Analysis of High Speed Rail Axle,U270.3
  21. Research on Car Frontal Impact Simulation and Crashworthiness Analysis,U467.14

CLC: > Industrial Technology > Electrotechnical > Motor > Generators, large the generator group ( Zonglun,) > Wind turbines
© 2012 www.DissertationTopic.Net  Mobile