Design On 4SY-1.8 Rape Windrower

Rapeseed is grown in China in an area of 110 million mu, almost the third of the world's area, however the harvesting mechanization is still less than 10%, which dramatically impact the development in rapeseed industry. The research now is focused on the windrower to solve the problem. Recently it is considered to be an important part in studying the harvesting mechanization for rapeseed in China.To realize the goal of the harvesting mechanization for rapeseed, a windrower is developed in this study, the general design of the machine, theoretical analysis and computer simulation of the main components were investigated, and accordingly, the research was conducted as follow:(1) The rape windrower used in the study was designed based on the findings of the previous researches carried out in China and abroad, the working principles, working process and basic structure were then identified, the basic parameters, structure parameters and performance parameters were also calculated.(2) The sub sectional cutting system was designed using the dynamic and kinematic analysis and computer simulation considering the cutting characteristics and stem requirements, a match model was used to calculate the rape cutting area and the height of the cutting zone for the rape stalks. The cutting figure stubble height 3D graphics were built bye editing the M files through the drawing function of MATLAB software, accordingly, two models were established to demonstrate the differences between the cutting area and the stubble height. The results from the parameters combination exposed a reduction in the ratio of overlapping and leakage in relation to the cutting area which reduced by 6.47% whereas the stubble height was consistency improved.(3) The conveyor system was designed using a vertical rolling assemble, telescopic platen assemble and conveyor belt assemble, the single integrated design for the vertical and horizontal pattern was relatively changed. Combining the different conveying systems and the operational parameters with physical properties of the rape stem, the conveyor systems were proved to realize the conveying requirements for the rape stalks during the field experiments.(4) The Pro/E software was used for modeling the 3D graphics and interference simulation analysis, which had an effective guidance in determining and optimizing the initial parameters of the design. The analysis from the finite element method for the frame of the rape windrower was also very useful in obtaining the frontal six orders, natural frequency values and different strikeout forms for the frame which revealed the steadiness of the rape windrower due to the nonexistence of the echo phenomena.(5) The findings from experiments conducted for the 4SY-1.8 windrower highlighted that the design could fulfill the requirements of the rape stalks based on the best cutting, conveying and placement.