Design On Air-assisted Vineyard Sprayer

The grape eppo homework is an important link in the grape planting, and it’s homework stand or fall, which greatly affected the quality of the grape products. But The artificial work is still the mainly way in most of the grape area, and it brings intensity labor, poor quality work and serious pesticide waste pollution. In view of this situation, a kind of air-assisted sprayer for vineyard on a small four wheel tractor which provides power for the sprayer has an important significance.a kind of air-assisted mist for vineyard frame structure fences crown on a small four wheel tractor which provides power for the sprayer was presented in this paper on the basis of abundant investigation. It allows to changing the phenomenon of uneven allocation of traditional orchards Mist Sprayer on the tree canopy jet for vertical spray truss Centrifugal Mist. Centrifugal wind sent the Spray not only prevented the unit forward of spray drift, while the second atomized droplets, and increase the penetrability of the droplet. By calculation the fluid dynamics software FLUENT riser outlet parameters, simulating of the nozzle spray field to determine the impact of natural wind on the aircraft spray. The specific research work is as follows:According to the small four wheel tractor have or not the power output shaft, two kind of frames are designed. Meanwhile, designing width adjustable vertical truss in order to adapt to different vineyard spacing. The whole machine mainly composed by solution box, take force device, pump, flow control valve, spray liquid flow systems, centrifugal fan, blow-dryer, adjustable truss and gearing. Completed by calculating the various components of the selection, including medicine cabinet, pump, nozzles, centrifugal fan and so on. Use the3D design software Pro/ENGNEER drew each parts and the whole body of the machine in three-dimensional entity, and it can be seen more intuitionisticly. Used in the design process to optimize the Pro/MECHANICA on the frame design, key components of the stress and deformation analvsis, greatly reducing the design time and reduce costs. The internal flow field of hairdryer, the key components of the system is simulated and thus choosing relatively reasonable outlet structure, spacing, fan flow, outlet velocity and other parameters. To find the wind speed of natural influencing spray drift, the simulation of pressure-swirl-atomizer is done by FLUENT. By doing some laboratory experiment we tested the analog simulation and the secondary-atomization. From the air-assisted experiment, the position of the nozzles, the angle of the air and fog flow, the velocity magnitude of the air and the influence on spraying under the different wind speed. Test results show that the outlet wind speed, the30cm away from the outlet and coefficient of variation are all well. In the air-assisted experiment, we use Dc as the criteria. The systems anti-drift function is well evaluated. From the result, the pesticide drift are reduced, the deposition are increased. The VMD of the droplets are all above100,the DR of the droplets is above0.70,which meet the requirements.