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

制作了一种将雪吹入管道的射雪机，通过高速气流将雪输送到管道中。射手是由一个圆柱形的外壳，旋转板和螺旋钻，以尽量减少气流速度的下降。盘是把雪送进管子的，螺旋钻是把雪块磨成均匀的小尺寸，以避免雪块堆积在管子里。枪手在户外进行了测试，其特征几乎与预期一致。对管内雪块进行了录像，并对雪块的速度和轨迹进行了分析。弯曲管处的速度会暂时减小，这种减小会使叠垛容易发生。在短长度弯曲管似乎有一个曲率半径最小的减少。并对雪块在路口的行为进行了分析。为了使管内的空气高速流动，主动力装置最好使用鼓风机，增压装置最好使用空压机等高压空气发生器。为了延长雪的运输长度，增加助推器比增加鼓风机的功率更好。由管道、鼓风机、压缩机和射雪器组成，是高速气流输雪的基本单元。将各基本单元连接在一起，可以在住宅密集地区的街道或屋顶上清除积雪的除雪机将成为现实。

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.