Design And Test Of The Clamping,Conveying And Buffering Bundle Device Of The Crawler Self-propelled Reed Harvester

Reed is a kind of tall and upright grass which has been aquatic or wet for many years.Reed is fine in texture and rich in cellulose.It can not only be used as industrial raw materials such as paper making,building materials,artificial fiber,etc.,but also can be woven into various crafts after processing.It has high economic and practical value.At present,the main harvesting methods of wet reed in China are manual and mechanical harvesting.The manual harvest takes time and effort,and the production efficiency is low;Compared with foreign countries,the mechanical harvest level is much behind,especially in the integration of whole stalk harvesting technology,especially in the integration of whole stalk harvesting technology far from that of foreign countries.In order to improve the mechanical harvest level of reed,this paper aims to develop a crawler self walking reed whole stalk harvesting and binding machine.Aiming at the characteristics of high stalks,low density and thick stalks of southern reeds,this paper designs and tests the clamping and conveying device and buffering collection device of the crawler self-propelled reed harvesting and bundling integrated machine.The specific research content includes the following aspects :(1)Study on physical and cutting mechanical properties of reed stemIn order to provide basic data support for the follow-up mechanism design and simulation experiment,the center of gravity displacement characteristics,friction characteristics and extrusion deformation characteristics of reed stem were tested by using the wild reed along the Yangtze River in Jingkou District,Zhenjiang City,Jiangsu Province as the experimental object;in order to study the mechanical characteristics of reed stem cutting,the swing cutting test bench was used to cut the reed stem.(2)Design of clamping conveying device and buffer collecting deviceAccording to the characteristics of reed stalks,a double belt flexible clamping device is designed to transport the cut reed from the front header to the rear strapping device with low loss and high efficiency;a double crank rocker mechanism is designed for the buffering and bundling device to collect the reed at the end of the conveying in an orderly and efficient way to facilitate the subsequent knotting work.(3)Numerical simulation of key parts of reed harvesterANSYS Workbench simulation method was used to analyze the main body of the clamping conveying frame.Structural statics analysis shows that the maximum value of deformation is 1.3mm,and the maximum value of stress is 136.6Mpa.The modal analysis shows that the first eight natural frequencies avoid the external excitation frequency.The lightness and rigidity of the structure meet the working requirements,and no resonance occurs.ADAMS software is used to analyze the kinematics of the buffer bundling mechanism,the motion path of the end of the executive arm is achieved,which verifies the feasibility of the mechanism;The curves of displacement,velocity and acceleration are obtained by further analysis,which verify the correctness of the mechanism.(4)Bench test of clamping conveyorThe completion of the drawing of all engineering drawings of the clamping and conveying device and the trial production and testing of the test bench further proved the correctness of the designed mechanism.In the bench test,the loss rate and the lodging failure rate of the clamping conveyor belt are taken as the test indexes.The optimization experiment was carried out for three factors: the speed of conveyor belt,the clamping gap and the angle of clamping conveyor.The results show that: when the speed of clamping conveyor belt is 1m/s,the clamping gap is 15 mm,and the angle of clamping conveyor belt is 25 °,the effect is the best.