水田叶轮单轮叶动力性能的试验研究

Experiment Research on the Dynamic Performance of a Single Lug

通过对水田叶轮单轮叶动力性能的大量测试结果,分析了轮叶产生的推进力、支承力和驱动效率受轮叶倾角、陷深、滑转率的影响和随轮叶转角位置的变化规律。轮叶产生最大推进力和支承力所对应的转角分别在90°和75°附近,支承力由正值变为零为零所对应的转角在100°左右。在95°轮叶转角附近轮叶的驱动效率最高,在80°至110°转角范围内有较高的驱动效率。但作旋轮线轨迹运动的单个轮叶,在滑转率10％～15％时最高驱动效率达75％,随着陷深和滑转率的增大驱动效率的平均值明显下降。

An octangonal transducer was designed to measured the normal and tangential forces on a single lug with various lug angle, slip and sinkage. The driving torque on the powered shaft of the model lugged wheel was also measured. The normal pull and lift forces and driving efficiency, the effects of lug angle, sinkage and slip on the forces and efficiency were analysed. A single lug had the highest efficiency at 15% slip. Lug forces increased obviously as the lug sinkage increased, but the average lug efficiency was lower as the sinkage increased The lug rotation angle of attaining the peak pull force was about 90?degree and increased with the increase of slip and lug angle. The lift force and the lug efficiency attained their peak value at about 75 and 95-100 degree rotation angle respectively at all slips and lug angles.