スピードスプレーヤ送風性能の向上

抄録

There are two methods of spraying agricultural chemicals in the orchard fields:hand spraying and the use of speed sprayers. The latter is generally used in large scale orchard fields. Speed sprayers are specially designed cars equipped with axial blowers, power sprayers, chemical tanks and spraying nozzles. The mist of chemicals delivered from the power sprayers and nozzles is carried by a large amount of air from axial blowers and the chemicals are sprayed when the car runs in the field so that the whole area is filled with fungicides and pesticides. Sometimes the height of trees exceeds 5 meters, so it is important that the chemicals reach all leaves. It is therefore considered ideal that the chemicals reach a long distance without being affected by natural wind. In this study,quality engineering was used using an Ll8 to assign the elements in the axial blower as control factors. The blower inlet air speed was used as the input signal and the outlet air speed as the output. Two levels of natural wind were assigned as the noise factor and dynamic characteristic, these were used for S/N ratio calculation. Computer simulation was used in the analysis. The gain calculated under the optimum condition was well reproduced. An actual machine was produced for confirmation and its reproducibility was also confirmed.