Graduation Design (Thesis) of Wuhan University of Technology

Design of gearbox in wind power generator

(School): International education college

Specialty amp; Class: Vehicle gj1303 class

Student name: Jipeng GAN

Tutor: Xinghui HAN

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ABSTRACT

The deteriorating ecological environment and the ever-decreasing non-renewable resources is an alert signal, which leads countries pay an increasing number of attention on new energy for power generation technology. This trend has directly promoted the dramatic development of wind power generation.Gearbox, as the core component of wind turbines, assumes the role of changing the input speed and transmission torque, so that it matches the generator. Due to the high failure rate of wind turbine gearbox, the key technology of wind turbine gear box design and manufacture has been an important factor that plagues the development of wind power in China and the world.

This paper is based on SOLIDWORKS software and ANSYS finite element analysis software for the design and analysis of megawatt-class wind turbine gearbox.

1. According to the conditions of its structural design, through theoretical calculation to select the appropriate parameters.

2. According to the design conditions of the gearbox components of the parameters as well as the use of Solidworks in accordance with the design data to draw the parts map, and then in the pro / E software assembly interface to assemble the parts together. After the drawing of the parts is completed, the important parts are imported into the ANSYS software for contact, stress and deformation analysis. Simultaneously, conduct modal analysis in order to obtain their frequency characteristics and vibration mode. After analyzing the frequency characteristics, make sure our design meets the requirements.

Key Words：Wind power; Gearbox; Solidworks; ANSYS; Modal analysis

Contents

Chapter 1 Introduction 1

1.1 Project Background 1

1.2 Overview of Wind Power Generation Development 2

1.2.1 Development of Wind Power Generation Abroad 2

1.2.1 Overview of Domestic Development of Wind Power 4

1.3 Purpose of Research 5

Chapter 2 Design of Gearbox for Wind Power Generation System 7

2.1 Gearbox Drive Design 7

2.1.1 Basic Gearbox Design Requirements and Design Steps 9

2.1.2 Transmission and Motion Schematics 10

2.2 Gear parameter Design 11

2.2.1 The Design of The Pinion Gear and Its Assembly Condition 11

2.2.2 Design of Cylindrical Helical Gear of Second Level Parallel Shafts. 15

2.2.3 Design of Cylindrical Helical Gear of Third Level Parallel Shafts. 16

2.2.4 Determination of the concrete structure of planetary gears 17

2.3 Material Selection and Strength Check 18

2.3.1 Material Selection 18

2.3.2 Strength Check of Planetary Systems 19

2.3.3 Strength Check of The Second Stage Cylindrical Helical Gear 23

2.3.4 Strength Check of The Third Stage Cylindrical Helical Gear 26

2.4 Design of The Axle 28

2.4.1 Design and Calculation of The Axis of The Planetary Wheel 29

2.4.2 Design of Input Shaft 30

2.4.3 Design of Low-speed Shaft 30

2.4.4 Design of Medium-speed Shaft 31

2.4.5 Design of High-speed Shaft 32

2.5 Transmission Gearbox Housing Design 33

2.6 The Sealing, Lubrication and Cooling of The Gear Box 33

2.6.1 Seal of The Gear Box 33

2.6.2 Lubrication and Cooling of Gearbox 34

2.7 The Summary of This Chapter 35

Chapter 3 Dimensional Modeling of Transmission 36

3.1 Introduction of Solid Works Software 36

3.1 Introduction of The Function of Solid Works Software 36

3.3 Parametric Modeling of Gearbox 37

Chapter 4 Finite Element Analysis Based on Ansys 40

4.1 Modal Analysis of Low Speed Shaft 40

4.2 Modal Analysis of Medium Speed Shaft 42

4.3 Modal Analysis of High Speed Shaft 44