Key Technology And Experimental Research Of 3WF-1000 Boom Sprayer

To solve the problems of spray boom,such as complex structure,high cost,relatively small span,spray balance mechanism and obstacle avoidance of complex mechanism,a spray boom lifting poor continuity and exhibition arm low degree of automation,spray uniformity and other issues,the structure design optimization of the key components of 3WF-1000 type boom sprayer,and factors of lifting and show the spray boom test,the main effect of overlapping uniformity test,The mist sprayer nozzle quantity uniformity,along the direction of the spray boom distribution uniformity test,the boom sprayer type 3WF-1000 type spraying machine has the advantages of simple structure,reliability,uniformity,further improve the economy.The research content of this paper is divided into the following 4 parts according to the research purpose:(1)Using Solid Works software design and assembly of the mechanical structure of spray boom,including spray rod spray boom balance mechanism,folding mechanism,a spray boom lifting mechanism and other parts,including: 1)adjusting mechanism design of spray boom frame height,the structure design of the lifting frame and slide force;2)analysis of the design of the spray boom rack balance buffer mechanism and working principle analysis,3)analysis on the middle;the spray rod frame finite element statics,ensures that the intermediate spray boom bracket strength to meet the requirements;4)the exhibition arm in the first paragraph of the spray boom frame structure design,connecting rod and pendulum rod length calculation,and the tail end of the spray boom obstacle avoidance mechanism design.(2)Through the lifting of the spray rod and the extension of the boom,the mechanical continuity and action time of the spray rod and the stack are obtained.(3)Using two quadratic regression orthogonal rotation center combination optimization test method,get a good combination of uniform spray parameters;experimental group compared to spray spraying pipe in the best combination of parameters,find out the best uniform spray pipeline packet;and then divided into 3 groups in the pipeline,along the direction of the spray rod spray distribution uniformity test,verify the optimum spray parameters combination.(4)The spray test of the sprayer,the variable spray at different speeds,the comparison of flow error and delay time,to find out the best working speed range and the flow error interval.The main conclusions of this study are as follows:1)through the structural optimization of the key components of 3WF-1000 type spray rod design,which has many advantages:(1)the lifting mechanism is more continuous and stable;(2)folding mechanism is simple and effective and high degree of automation;(3)with automatic suspension balance automatic balance mechanism with a plurality of connecting rods with each other can be realized multi direction adjusting buffer.2)Through the spray on the console,using two orthogonal rotation center combination optimization test method,get a good combination of uniform spray parameters: nozzle working pressure 0.4 MPa,nozzle height 500 mm,nozzle spacing of 500 mm spray uniformity is good.Through experimental study on line grouping showed that in the standard 0.4 MPa working pressure,the pipeline is divided into 2 groups for each nozzle spray liquid,the coefficient of variation was 6%;3 for liquid spray nozzle,the coefficient of variation was 2.4%;divided into 4groups for each nozzle spray liquid,the coefficient of variation was 2.1%,average meet the national standard,considering the economic and other factors,and ultimately determine the way of liquid feed into 3 groups for liquid.According to the national standard,the variation coefficient of the spray uniformity of the multiple nozzles along the direction of the spray rod reaches to4.7-4.9%,and the flow error is small and the delay time is shorter when 8-12 km/h is used in the variable spraying operation.