Development of snow shooter and a method to extend snow-transport distance through tube with high-speed air flow.

本文介绍了一种利用高速气流将雪吹到输雪管道中的射雪机。该射手是由一个圆柱形的外壳，旋转板和螺旋，以尽量减少气流速度的下降。这些板是为了将雪送入管道，螺旋钻是为了将雪块研磨成均匀的更小的尺寸，以避免雪块在管道中堆积。在室外进行了射击试验，其性能与预期基本一致，并对管内雪块进行了录像，分析了雪块的运动速度和运动轨迹。弯管处的速度暂时降低，这种降低将使叠堆容易发生。短长度的弯曲管似乎具有使减小最小化的曲率半径。分析了雪块在连接处的受力情况，认为风机作为主动力装置使管内空气高速流动是最好的选择，而高压空气发生器如空气压缩机作为增压器是最好的选择。为了延长输雪长度，增加增压器比增加鼓风机功率更好，管道、鼓风机、压缩机和喷射器的组合是高速气流输雪的基本单元。通过将基本单元彼此连接，可以在房屋密集的区域管理街道或屋顶上的积雪的除雪机将用于实际用途。

A snow shooter blowing snow into the tubes of which snow is transported with high-speed air flow has been made. The shooter is consisted of a cylindrical casing, rotating plates and a auger, to minimize decreasing of the speed of the air flow. The plates are to send snow into the tube, and the auger is to grind snow blocks into uniformaly smaller size to avoid stacks of snow blocks in the tube. The shooter was tested out of doors, and the characteristics were almost as expected.Snow blocks in the tubes were video-taped, and both the velocity and the locus of these blocks were analyzed. The velocity at the bending tube decreased temporarily, and this decreasing would make the stacks be easy to happen. The bending tube in short length seemed to have a radius of curvature minimizing the decreasing. Also behaviors of snow blocks at junctions were analyzed.An air-blower is the best for main power unit to make high-speed air flow in the tube, and high-pressured air generator like an air compressor best for booster. For extending the length of snow transport, adding the boosters is better than increasing the power of an air-blower.The formation of the tube, an air-blower and a compressor/s and the shooter/s is a basic unit for snow transport with high-speed air flow. By joining the basic units with each others, a snow removal machine, which can manage snow on streets or roofs in the area crowded with houses, will be for practical use.