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Denatured eccentric - non-circular interpolation Planetary institutional analysis , design and parameter optimization

Author: GaoLinDi
Tutor: ZhaoYun
School: Zhejiang University of Technology
Course: Mechanical Design and Theory
Keywords: Deformation of eccentric non-circular Gears transplanting mechanism Kinematic analysis Computer-aided analysis Optimization Dynamic Simulation
CLC: S223.91
Type: Master's thesis
Year: 2011
Downloads: 59
Quote: 2
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Abstract


Rice is the major food crops, sowning area 29962 thousands hectares, accounting for 27.6% of the sown area of grain, grainning yield 187.91 million tons, accounting for 40.7% of food production. China which is one of the the world origin of cultivated rice is the world’s oldest nationa to sown the rice, about seven thousand years. However, the level of mechanization of rice production is not high, the basic use of artificial seedlings, planting, harvesting is not efficiency, and the price along with the upgrading of human resources, this manual method shows more and more obvious shortcomings. The expansion of mechanized rice planting is good for improving area of rice cultivation, reducing the intensity of rice cultivation, reducing production costs and increasing efficiency of agriculture .The core components of the rice transplanter is transplanting mechanism, which will directly determine the transplanter machine level. Currently on the market of high-speed transplanting mechanism are generally developed by a Japanese eccentric gear transplanting mechanism or elliptical gears transplanting mechanism. These institutions generally only consider whether the seedling needle track achieving the requirements of planting, and the relative speed of the seeding needle (the relative speed of the needle seeding determines transplanting mechanism "injury seedling rate" in size) not be considered. To reduce the transplanting mechanism "injury seedling rate" for increasing rice production, we must design a new type transplanting mechanism to reduce the relative speed of needle seeding.This paper successfully design of the new proprietary transplanting mechanism which is deformation of eccentric non-circular Gears transplanting mechanism.the research contents are:(1) Researching on the Japanese high-speed rice transplanter rotary transplanting institutions and currently used crank-rocker mechanism transplanting mechanism, point out that the non-uniform transmission is the core technology of rotary transplanting institutions.(2) First proposed the deformation applied to the eccentric - non-circular gears, formate a new deformation of eccentric non-circular Gears and the gear section of the closed and convex and concave curve was validated. The new gears is applied to transplanting institutions and establish a deformation of eccentric non-circular Gears transplanting mechanism kinematics model, discusses the deformation of deformation of eccentric non-circular Gears transplanting mechanism working principle and structure characteristics.(3) To establish the mathematical model institutions of gear and deformation of eccentric non-circular Gears transplanting mechanism, developed the gear tooth profile generation software and deformation of eccentric non-circular Gears transplanting mechanism aided analysis and optimization software. And introduced the non-circular gear tooth profile generated by DEA principle and the basic functions of the two software modules, features.(4) According to Chinese agricultural requirements, proposing transplanting mechanism optimization goals and methods, analysising parameter’s effect on the kinematic characteristics, using self-developed software interactive optimization method to optimize the transplanting mechanism structural parameters, to meet job requirements of high-speed transplanter transplanting. Comparing deformation of eccentric non-circular Gears transplanting mechanism with the original transplanting mechanism to extrude the advantage of deformation of eccentric non-circular Gears transplanting mechanism.(5) In accordance with the optimized structure parameters, complete deformation of eccentric non-circular Gears transplanting mechanism overall design, discuss design issues that should be noted that, in the end accmplish assembly and each part of the design by AutoCAD2004 .(6) Create parts of the solid model by three-dimensional software UG, and complete its virtual assembly. Using ADAMS mechanical system simulation software for dynamic simulation of the structure. Dynamic simulation results obtained that the resulting three-dimensional dynamic simulation of seeding needle track highly consistent theory with VB software seedlings trajectory of the needle and proving deformation of eccentric non-circular Gears transplanting mechanism meeting the planting requirements, while another confirmed the theoretical model and simulation model is correct.Deformation of eccentric non-circular Gears transplanting mechanism patents pending, 2 computer software copyrights is accepted.

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CLC: > Agricultural Sciences > Agricultural Engineering > Agricultural machinery and implements > Planting machinery > Planting machine > Rice transplanter
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