Chapter 1Introduction to Rice Harvesting
1.1Introduction for Rice Harvesting
1.1.1Developing of rice harvesting
1.1.2Chinese combine harvester of rice
1.2Field Growth Status of Rice at Maturity
1.3Rice Grain Properties and Modeling
1.3.1Morphological structure of rice grain
1.3.2Mechanical properties of rice grains
1.4Rice Stem Properties and Modeling
1.4.1Morphological structure of rice stem
1.4.2Mechanical properties of rice stems
1.4.3Breaking force distribution and breaking mode
1.5Rice Leaves Properties and Modeling
1.5.1Rice leaves and tensile test property
1.5.2Threepoint stretching of blades
1.5.3Tensile performance at different temperatures
1.5.4Moisture content law at different temperatures
1.5.5Tensile properties of multiple blades
1.6Control Method for Rice Plant Break Property
1.6.1Rice stem breaking force
1.6.2Rice leaves breaking force
1.6.3Changing of rice microstructure
Chapter 2Rice Stem Cutting and Conveying Equipment
2.1Introduction to Cutting and Conveying
2.1.1Structure of front header
2.1.2Structure of pentagon reel
2.1.3Structure of cutting bar
2.1.4Structure of combine auger
2.1.5Structure of assembly of front header
2.2Static Analysis of Front Header
2.2.1ANSYS simulation of front header
2.2.2Experiment mode of front header
2.3Stems Cutting Situation and Property in Field
2.3.1Rice stems cutting property
2.3.2Stems cutting situation in the field
2.4Dynamic Property during Cutting Process
2.4.1Vibration test method of front header
2.4.2Frame vibration of front header
2.4.3Cutting table rack vibration on land
Chapter 3Rice Threshing and Separation Method
3.1Threshing and Separate Model of Rice Grain
3.1.1Grain threshing and separation model
3.1.2Threshing and separation test of model
3.2Rice Stalk Movement during Rice Threshing
3.2.1Numerical model of threshing unit
3.2.2Straw movement speed and trajectory
3.2.3Eccentric load in threshing process
3.3Design and Optimization of Threshing Cylinder
3.3.1Negative pressure spiral feeding device
3.3.2Design of threshing cylinder cover
3.3.3Length optimization of threshing cylinder
3.3.4Design of transverse and longitudinal combined
3.3.5Design of transverse threshing multicylinders
3.4Threshing Results with Different Mature States
3.4.1Different mature states of rice
3.4.2Threshing and separation performance
3.5Parameters Prediction and Control of Rice Threshing
3.5.1Threshing torque and force of drum
3.5.2Methods of optimal parameter prediction
3.5.3Threshing cylinder parameter control
Chapter 4Damage of Rice in Threshing Process
4.1Threshing Force of Cylinder Threshing Bar
4.1.1Threshing force test method of threshing bar
4.1.2Threshing force of cylinder acting on stem
4.2Damage Property of Rice with Threshing Force
4.2.1Possibility of rice stalk damage
4.2.2Breaking property with combined force on stem
4.2.3Breaking property of rice leaves undergoing
4.3Microstructure of Rice Stalk after Threshing
4.4Grain Damage in Threshing Process
4.4.1Grain damage model undergoing threshing
4.4.2Mechanical characteristic parameters of rice grains
4.4.3Damage model of rice internal damage
4.4.4Internal damage of grain by threshing bars
Chapter 5Cleaning Device and Conveying Process
5.1Mixture Property of Rice after Threshing
5.1.1Floating speed test method of cleaning materials
5.1.2Floating speed of cleaning materials
5.2Influence of Air Flow in Cleaning Device
5.2.1Airandscreen cleaning device
5.2.2Air velocity test in the cleaning room
5.2.3Floating distribution state of mixture
5.3Theories of Rice Grain Cleaning Process
5.3.1Vibration screening motion theory
5.3.2Grains group separating theory
5.3.3Cleaning capability of queuing model
5.4Airandscreen Cleaning under Multiparameter
5.4.1CFD simulation of airflow field
5.4.2Fluidsolid coupling in cleaning room
5.4.3Distribution and loss rate of cleaned grain
Chapter 6HumanMachine Interface Chassis Platform
6.1HumanMachine Driving Operation Platform
6.1.1Rice combine harvester cab
6.1.2Cab maneuvering space layout
6.2Crawler Chassis Structure of Combine Harvester
6.2.1Overall structure of crawler chassis
6.2.2Main variable of crawler chassis
6.3Development of Crawler Steering Gearbox in Field
6.3.1Unilateral brake steering gearbox
6.3.2Positive and negative steering gearbox
6.3.3Tracks and trajectory of steering gearbox
6.4Design of Chassis Frame and Threshing Frame
6.4.1Structural design of chassis frame
6.4.2Structural design of threshing frame
6.5Bearing Capacity Analysis for Crawler Chassis
6.5.1Chassis frame structure load and stress state
6.5.2Analysis of carrying capacity of chassis frame
6.5.3Test of carrying capacity of chassis frame
Chapter 7Dynamic Load during Rice harvesting
7.1Integrated Status of Combine Harvester
7.1.1Component of combine harvester
7.1.2Combine harvester integration
7.2Dynamic Load of Rice Harvesting
7.2.1Transmission of combine harvester
7.2.2Dynamic load test method in field
7.2.3Affordability load of rice harvesting
7.3Dynamic Load of Crawler Drive Shaft
7.3.1Structure and stress of drive shaft
7.3.2Dynamic load test method of drive shaft
7.3.3Dynamic load undergoing different condition
7.4Reliability and Fatigue of Chassis Gearbox
7.4.1Structure principles of tracked gearbox
7.4.2Gear strength of tracked gearbox
7.4.3Chassis gearbox fatigue test
Chapter 8Dynamic Response Undergoing Harvesting
8.1Component Vibration of Combine Harvester
8.1.1Frame vibration of front header
8.1.2Unbalanced vibration of threshing cylinder
8.1.3Vibration response of harvester chassis frame
8.2Vibration Modal of Whole Combine Harvester
8.2.1Frame vibration model under multisource excitation
8.2.2Vibration response with field excitation
8.2.3Unbalance vibration modeling of grading chain drive
8.3Mutual Interference and Coupling Response
8.3.1Coframe multicylinder test bench in rice threshing
8.3.2Modal response under multisource excitation
8.4Dynamic Simulation Model of Combine Harvester
8.4.1Multisource excitation forces of rice combine harvester
8.4.2Comparison of simulation results and test results
Chapter 9Rice Straw Harvester in Field
9.1Straw Treatment after Rice Harvesting
9.2Method for Straw Picking and Baling Harvester
9.2.1Conceptual model of picking and baling machine
9.2.2Design method of picking and baling harvester
9.2.3Structural model of picking and baling machine
9.3Vibration Property during Picking and Baling
9.3.1Inertial vibration of crank slider
9.3.2Crank linkage structure dynamics
9.3.3Natural frequency and modal of piston
9.3.4Vibration property during machine running
9.4Straw Picking and Baling after Harvesting in Field
9.4.1Bundling capacity of machine
9.4.2Baling performance in field
9.5Harvesting and Bundling Integrated Harvester
9.5.1Harvesting and bundling combine harvester
9.5.2Straw bundling of integrated combine harvester
References
內容試閱:
Rice is the main staple food for half of the population all over the world. As a modern rice harvesting machine,combine harvester can complete the processes of harvesting,threshing and cleaning at one time. In China,crawler rice combine harvester is a mainstream harvester,because in southern China,there are many small and mediumsized fields. During the rice harvest season,the soil in a small area is also relatively wet and soft. There were many factors that influence soil compaction apart from soil properties,mechanical pressure,soil layer,the time of compaction and so on. Crawler rice combine harvester can effectively reduce mechanical compaction on the wet soil. However,there are few books about theory,modeling,and design of crawler rice combine harvester. This is also detrimental to the promotion and the development of crawler rice combine harvester in China.
This book is about the
theory,modeling,and design of crawler rice combine harvester. The theory,modeling,and design of this book are the results of the author and his teams research on crawler rice combine harvester for more than 10 years. There are nine chapters in this book. The first chapter is introduction to rice harvesting. In this chapter,rice maturity and properties are introduced. Readers can learn about the attributes of rice stalks,rice leaves and grains as well as the characteristics of the threshing process. From chapter 2 to 5,rice stems cutting and conveying,rice threshing and separation,grain cleaning device and conveying process are introduced. In these chapters,readers can learn about the
theory,modeling,and design of crawler rice combine harvester. For chapter 6,chapter 7,and chapter 8,humanmachine interface chassis platform is designed. When the cutting,conveying,threshing,separating equipment were integrated on chassis platform,the dynamic load and vibration during rice harvesting were analyzed. The last chapter,the rice straw harvesting method and equipment are introduced. There is a wealth of knowledge contents and new knowledge of crawler rice combine harvester in this book. These research results are of important theoretical value to the design and research of crawler rice combine harvester.
Given its engineering content based on the authors practice,this book is also recommended for other courses in Agricultural Engineering that emphasize functional analysis,design,and research in field machinery. This book is also designed to be both introductory and comprehensive for a twocourse sequence for undergraduate and graduate students,respectively. In regard to the theory,analytical techniques,engineering design expertise,and software use,this book also serves as a useful reference tool for scientists and practicing engineering professionals in academia and industry around the world.
Zhong Tang2021Jan.21