The Design And Key Parts Optimization Of The Self-propelled Baler

As biomass energy,crop stalks recycling is an important trend involving environmental issues.At present,traction balers used widely,however,they are not suitable for small plots in southern China,because of their excessive turning radius.Therefore,it is necessary to develop crawler self-propelled balers with a small turning radius and low ground pressure ratio.For the development of crawler self-propelled balers,the layout of transmission and mechanism of the whole machine is proposed.Intelligent algorithm is adopted to optimize the design of pick-up mechanism and screw conveyor.Simulation analysis and design are carried out on key mechanisms such as chain scraper conveyor,feeding mechanism and baling piston.Research contents include:Firstly,for the development of crawler self-propelled balers,the design principle of the machine is established.the spatial layout of the crawler self-propelled balers was proposed according to the technological process of each mechanism.The transmission scheme and transmission distribution of the machine are designed,and safety check on each drive shaft is carried out.Secondly,The influencing factors,the Optimization target and related constraints are determined after the structural analysis of the pick-up mechanism and screw conveyor.The intelligent algorithm is used to optimize the related parameters and get the best design parameters.Then the rationality of structural optimization is verified by simulation analysis.After optimization,compared with the traditional theoretical optimization,the blow-by rate of this pick-up mechanism is reduced by 57.4%,Material and spring contact speed is reduced by 6%.The conveying efficiency of screw conveyor is increased by 12.1% at least compared with the mainstream models on the market.the research provides new idea for the optimization of agricultural mechanism components.Once again,the structural design of chain conveyor,feeding mechanism and bundling piston mechanism is carried out.Structurally,the anti-winding device for chain conveyor is designed in an innovative way.The movement state of the feeding mechanism in each time period is analyzed according to the velocity and displacement curves of the feeding mechanism obtained by simulation analysis.The rationality of structure design is analyzed according to the verification of the minimum transmission angle of the baling piston mechanism,and the velocity and displacement curves of the piston,which were obtained by simulation analysis.It provides theoretical basis for subsequent optimization.Finally,the structure of the frame is determined according to the load and space layout of the machine.the maximum stress and deformation of the frame are solved through static analysis.The results show that the maximum stress is 91.53 Mpa,the maximum deformation is 1.6mm,which meets the design requirements.The whole machine is modeled and assembled according to the size of each mechanism,which means the rationality of the whole machine layout is verified.Based on the research above,the machine takes 1.05 hour per hectare with 350 bales are bundled when it works,the Ground pressure ratio is 14.8Kpa,and the minimum turning radius is 1.2m.In short,the picking up conveying performance and baling efficiency of the whole machine have been improved significantly,the ground pressure ratio and the turning radius are smaller,which can be well adapt to small plot operation.The research of this paper provides a reference for the development of the self-propelled baler and plays an important role in improving the operation efficiency in the small plots.