| Inner Mongolia autonomous Region has a vast natural grassland and abundant herbage resources,but these resources have regional and seasonal imbalance,leading to a low utilization rate of herbage.The ability of storage and transportation can be improved by compressing loose herbage into bales.The traditional herbage baling press usually adopts the crank slider compression mechanism,which has simple movement characteristics,and its movement rules can not adapt to the herbage compression theory,which has the problems of high energy consumption and low efficiency.According to this,the cam-type compression mechanism was proposed to realize the variable-speed compression of herbage by taking advantage of the complex movement rules of the CAM mechanism.In order to study the advantages of CAM compression mechanism over traditional crank slider compression mechanism,the following aspects are studied in this paper.(1)On the basis of studying the research status of the compression mechanism of forage baler and herbage compression theory at home and abroad,a bias crank slider compression mechanism was designed according to the existing CAM compression mechanism,and the two were further compared.(2)The CAM type compression device was used for the physical test to detect the maximum compression force and the force on different positions of the blade during the compression process.The results showed that the force on the blade was gradually decreasing with the movement of the blade during the compression process.(3)The structure analysis and data collection of the existing CAM compression device are carried out to provide a theoretical basis for the design of the crank slider compression mechanism.The program design of the crank slider mechanism was carried out and the rationality of the design was verified.The kinematics and dynamics mathematical model of the crank slider mechanism was established,and the mathematical model was programmed and solved by MATLAB software.By analyzing the characteristics of kinematics and dynamics,relevant theoretical parameters are obtained to provide theoretical basis for the subsequent dimension design of components.(4)Analyze the working process of the mechanism and determine the assembly relationship of each component.Complete the dimension and structure design of each component,check the important parts to ensure the service life of the parts.UG software is used to complete the assembly of each component and carry out motion simulation to check the interference and collision between components.Complete the parts drawing and assembly drawing of the mechanism to prepare for the mechanism solid processing.(5)the use of virtual prototype technology to complete the CAM type compressor and offset slider-crank kinematics and dynamics characteristics of compression device,by comparing the results found that under the same working stroke CAM type compression mechanism compared with offset slider-crank institutions increased 20%compression time compression,the corresponding points under the most energetically is roughly same,CAM type to the largest power consumption for compression is far lower than the same type of offset slider-crank mechanism. |
PDF Full Text Request