| Round bale balers are one of the machines for harvesting crop straw,but most of the round bale balers on the market are traction type,which have problems such as incompact structure,inconvenient operation and invariable diameter of round straw bales.Aiming at the above problems,this paper designs a self-propelled round bale baler,which uses a cab instead of a traction tool,and realizes the variable diameter of the round bale,which improves the adaptability,safety and reliability of the baler during operation.reliability.First,a variety of schemes for feeding and baling devices of the baler were innovatively designed using TRIZ theory,and the best scheme was determined after evaluation.Complete the selection of key components such as hydraulic motors and hydraulic pumps,carry out parameter design and structural arrangement for key devices of the baler,and complete the overall structural design of the baler.Secondly,use ANSYS Workbench to perform static analysis on the baler’s feeder plate,frame,steel roller and other components,and compare the simulation results to select better performance feeder plate,frame and steel roller;The modal harmonic response analysis was carried out to find out the frequency and position of the frame prone to failure;the fatigue analysis of the embedded steel roll was carried out to verify that the strength of the steel roll could meet the working requirements.Then,the process of forming the straw core in the baling chamber is analyzed,and it is found that the main driving force for the straw core forming is the friction force of the steel roller on the straw and the thrust of the subsequent straw,and the resistance is mainly the straw’s own gravity.The linear speed of the end point of the machine,the linear speed of the end point of the feeding plate and the linear speed of the edge of the steel roll;the dynamic analysis of the whole machine was carried out by Adams,and it was found that the linear speed of each end point was basically the same as the calculated linear speed,which verifies the correctness of the calculation and this part feasibility of the design.Finally,the dynamic analysis of the picking and feeding device is carried out,and it is concluded that when the speed of the picking device is constant,the smaller the forward speed of the baler,the lower the picking loss rate;when the forward speed of the baler is constant,the higher the speed of the picking device,The higher the pick-up loss rate;Adams and discrete element software were used to conduct coupled analysis to simulate the actual operation of the baler in the field,and the factors affecting the pick-up loss rate were the same as the dynamic analysis.The kinematics analysis of the variable diameter device and the unloading device was carried out respectively.After calculation,it was concluded that the displacement of the steel roller along the waist hole was basically the same as the design;the maximum horizontal and vertical displacement of the Marker point when the rear bale chamber was opened Both are larger than the maximum diameter of the straw bale,and the maximum force of the frame when unloading the bale is less than the allowable stress of the material,both of which meet the design requirements.Figure [76] Table [19] References [95]... |
