Study On The Chassis Of Hydraulic Driven Ratooning Rice Harvester With The Function Of Avoiding Piles

In the hilly region of southern China,the mechanization of the first season harvesting of ratooning rice is relatively low.Due to the terrace planting pattern,artificial harvesting is still used in some areas to harvest the first season ratooning rice,and the working efficiency is low.For the existing ratoon rice harvester,the biggest problem is that the whole machine is easy to sink during the harvest of the first season rice,and it is easy to crush the rice piles,so as to affect the yield of ratoon rice in the second season.To solve these problems,this paper puts forward the idea of avoiding rice piles,and design a kind of hydraulic chassis for harvesting ratooning rice that has the function of avoiding piles by regulating the wheel spacing of the drive wheel.It has the characteristics of large driving torque and good performance,and the chassis has the function of avoiding pile,which can reduce the rolling rate of rice pile to some extent.The thesis mainly studies from the following aspects:(1)By analyzing the design requirements for the chassis of a ratooning rice harvester with a avoid function,proposed a scheme of hydraulic driving wheeled harvester,combined with digital hydraulic cylinder and wheel hydraulic motor to realize ratooning rice harvester’s driving wheel rotation and lateral displacement function,and design the hydrostatic drive system.(2)The thesis carry out the dynamics analysis of ratooning rice harvester,and determine the working pressure of the hydraulic system.what’s more,the thesis calculate and select the key hydraulic components and their supporting power sources based on the load parameters analyzed.(3)Using AMESim to simulate and analyze the hydraulic driving system.By establishing the simulation model of hydraulic system,defining the working parameters of hydraulic components and running simulation,the feasibility of the designed hydraulic circuit and the rationality of the calculation are verified.(4)Using ANSYS to analyze the modal analysis of the designed chassis frame for ratooning rice harvester,and compare with the excitation frequency of the engine to avoid the occurrence of resonance phenomenon.Using ANSYS Workbench,static analysis design is carried out to ensure that the driving wheel coaxial line is designed to meet the requirements of work intensity.In addition,the key components such as sliding mechanism,cutting table and power input device of the unloading mechanism are calculated and designed.At last,using Solidworks software to complete the 3d modeling of the whole machine.(5)Through analyzing the surrounding environment of the rice pile,a mechanical detection device was designed to obtain the information of rice pile.In addition,the control system is built up by the design circuit of the same side displacement feedback device,signal processing device and the anti-pile action actuator.(6)By analyzing the relationship between the various signals transmitted in the avoiding pile control system,a theoretical mathematical model is established.And the thesis formulate the execution program flow of the avoiding pile control system.Finally,the rationality of the mathematical model and the feasibility of the control program are verified by the simulation test.