Development And Experiment Of Combined Operation Machine For Split Deep Rotary Tillage And Soil Disinfection

In recent years,facility agriculture has developed rapidly,and the production area has been increasing.However,due to continuous cropping and environmental factors,various viral bacteria in the soil have accumulated year by year,affecting continuous soil cropping,which has caused great obstacles to the development of facility agriculture.In view of the current soil diseases and insect pests in facility agricultural production,domestic and foreign scholars have developed a variety of solutions.At present,disinfecting the soil during stubble is a more effective method to solve the obstacles of continuous cropping,which can greatly reduce the accumulated virus,Is conducive to improving crop yield and quality.These soil disinfection techniques can be roughly divided into three categories,namely physical disinfection techniques,chemical disinfection techniques and biological fumigation disinfection techniques.For various soil disinfection methods,the most commonly used vegetable farmers at present are the chemical disinfection method,which uses various chemical disinfection methods to disinfect the soil through spraying,irrigation,soil mixing and fumigation.The most obvious advantage of this method is low economic cost,simple method,suitable for large-scale use,but its biggest disadvantage is that various chemical agents are not friendly to the ecological environment.This paper proposes a method of joint operation of soil disinfection for deep rotary tillage in greenhouse.It also disinfects soil during rotary tillage to achieve complete and effective disinfection of deep soil,and designs and manufactures physical prototypes for field trials.Firstly,This paper designed a reasonable uniform test,taking the two quantitative factors of blade roller advancing speed and blade roller speed and the two qualitative factors of rotary tiller blade type and arrangement as independent variables,and the single blade roller advancing resistance and single blade roller cutting torque As a dependent variable,the virtual simulation test was conducted using the finite element analysis software ANSYS / LS-DYNA,and the post-processing software Ls-PrePost and the data analysis software SPSS were used to analyze the simulation results.Regression equations about the respective variables,so as to analyze the impact of the blade roller advance speed,blade roller speed,rotary blade shape and arrangement on the blade roller advance resistance and soil cutting power consumption during the cutting process of the vertical rotary tiller Obtain the optimal combination of the variables corresponding to the minimum advancing resistance and the cutting power consumption respectively.In this paper,based on the results of the virtual simulation test of vertical rotary tillage and cutting soil,a separate vertical rotary tillage soil disinfection combined working machine is designed from the perspective of reducing the power consumption of machine tools.It mainly includes the design of its transmission system,rotary tillage part and disinfection part,the design and verification of the main component transmission gear set of the gear commutator at all levels in the transmission system,the design of each axis in the gear box,and then the The rotary tiller roller is designed,and the original disinfection parts of the disinfection part are selected and arranged.On this basis,the modal analysis of the gears in all levels of gear commutators,gear commutators at all levels,rotary tiller blade rollers and rotary tiller disinfection combined working machines was carried out,and the first ten natural frequencies of the analyzed objects were obtained.As well as the vibration mode,the rationality of the design is verified.In this paper,the physical prototype of the rotary tillage and disinfection combined working machine was processed and verified,and its working effect was verified through field experiments.The rotary tillage depth,the stability of the depth of tillage and the uniformity of the combined operation machine disinfection were tested.The field test results showed that the average ploughing depth of the combined operation machine reached 330 mm,the plough depth stability coefficient reached 94.84%,and the disinfection uniformity coefficient was 64.23%.Compared with the traditional spraying method on the surface of the soil,the designed combined operation machine is used to carry out the combined disinfection of the soil surface and the inside of the soil to achieve a better disinfection effect.