Three-directional Adjustable V-type Soil-covered Roller Design And Research On Anti-sticky Technology

The cold farming area in the northeastern coldland is too long due to the cultivation time of the cultivated land,and the farming mode makes the soil disturbance large.Cultivated land faces serious degradation,soil water shortage and other problems.Resulting in a serious decline in the quality of sowing operations.The principle of no-tillage and straw-splitting precision seeding technique using the lateral throwing of straw.Under the premise of less soil disturbance.Once entering the ground,it can complete many operations such as clear straw straw,fine seeding,lateral deep fertilization,overburden cracking,and chemical spraying.Among them,the cracking of soil is the key technical link in this planting mode.In this paper,the problem of overburden cracking in the no-tillage and straw-seeding technique of the original land.An angle three-way adjustable V-type soil-covering roller compactor is designed to match the original no-tillage straw planter.At the same time,in order to solve the problem of soil adhesion during the work of overburden and roller compactor under no-tillage soil.Through the design of anti-adhesive structure and the use of surface anti-stick coating two technical approaches.To solve the problem of the influence of clay on the no-tillage and soiling of the clay straw in the northeast.The main research work is as follows.?1?Design of a three-way adjustable V-Type soil-covered roller:According to the relevant technical requirements of the 2BMFJ series of original no-tillage straw precision planter and the design requirements of the soil-removing device in the agricultural machinery design manual.An angle three-way adjustable V-type soil-covering roller is designed.The overall structural design scheme of V-type soil-covering roller is proposed.Analyze its working principle,requirements for major components and key work components are given design and calculation of structural parameters of the key working parts covered with soil pressure discs.?2?Analysis of soil adhesion process and ABAQUS finite element virtual analysis:According to the theory of modern agricultural mechanics and soil adhesion mechanics.The interaction between the soil-retaining disc and the soil and the process of soil adhesion and the causes of the soil compaction of the overburden pressure reducer are analyzed.Using ABAQUS finite element analysis to analyze the interaction between soft soil overburden and soil contact movement process.The simulated value of soil compaction during the work of the soil-filled roller is about 34.6⁴1.5kPa.Satisfying the agronomic effect of the soil compaction device on the compaction of the soil after ditching.The stress,strain and displacement values of the soil model after compaction of the soil by the soil compacting disc of the roller compactor are calculated.?3?Design of UHMWPE anti-adhesive structure for three-way adjustable V-type soil-covering roller:Based on modern bionics research results and UHMWPE anti-adhesive material properties.Designing a set of anti-clay structures on the soil surface of the soil-pressing roller,to achieve reasonable anti-sticking technology by changing the way of structural distribution.Hybrid orthogonal optimization,The number of soil sand and anti-adhesive structures in different soil types,soil moisture,load and operating speed are the influencing factors.Response function as soil thickness,soil adhesion and soil compaction,five-factor three-level hybrid orthogonal test.Exploring the impact of various factors on indicators and the primary and secondary order of impact on comprehensive indicators.Optimization results indicate:When the number of anti-adhesive structures is 12,soil water content less than or equal to 25%,load less than or equal to 800N,speed less than or equal to 7.2 km?h^-1,in the north black clay loam environment,The amount of soil adhesion of the soil-retaining roller with anti-adhesive structure is42.9 g,the average soil compaction is 40.5 kPa.Compared with metal disc roller,the viscosity reduction performance is improved by 49.8%.In a simulated sandy loam environment,the soil compaction is 38.7 kPa,can meet the suppreerformance requirements..?4?Study on anti-clay technology of polytetrafluoroethylene?PTFE?coating:Trial and spray curing by coating formulation,manufactured a soiled roller with a release coating.In the same environment as the UHMWPE material anti-adhesive earth pressure device.A very significant factor in obtaining the amount of soil adhesion affecting the coating anti-sticking roller is the soil moisture content.A very significant factor affecting the soil compaction of a coated anti-sticker is the load.Comprehensive consideration of soil adhesion and soil compaction index.The order of the optimal parameters combination and the impact of the comprehensive index is soil water content less than or equal to 25%,speed less than or equal to 7.2 km?h^-1,load less than or equal to 800N.?5?Comparative experimental study on anti-adhesive technology of three-way adjustable V-type overburden roller:Under the conditions of two soil types is clay and clay loam,soil moisture content as a test factor.Compare three kinds of soil-reducing devices under two soil types.Comprehensive performance of covering,repressing and anti-sticking of each roller.For different soil conditions,the reference of the soil-removing device and the anti-adhesive technology after no-tillage straw sowing is provided.