Authors

Abstract

Through the mechanical analysis of air-pressure subsoiler, it is found that the main factors affecting its tractive resistance are the air pressure injected into the soil, the soil cohesion, the length and width of the shovel surface, the soil disturbance coefficient, and moving speed of the subsoiler. The traditional air-pressure subsoiler was redesigned to solve the problem of large tractive resistance. In the soil trench experiment, the subsoiling shovel’s shape, the air pressure, and the position of air hole were used as test factors, and the ratio of the traction resistance of the shovel to the soil disturbance, namely SDF (Specific Draft Force), was used as the evaluation index. By the response surface test method and analyzing the soil disturbance and the tractive resistance, it is determined that rectangular subsoiling shovel with the air hole in the upper part of the shovel is the optimal under the pressure of 1.2 MPa.

Abstract in Chinese

针对气吹式深松铲阻力大的问题，通过对气压式深松铲力学分析，确定影响牵引阻力的因素主要有，注入土壤内部的气压大小、土壤的内聚力、铲面的长度与宽度、土壤扰动系数以及深松铲行进速度。重新设计气压式深松铲，在土槽实验室中以深松铲铲形，气压大小，与气孔位置为试验因素，以深松铲牵引阻力与深松土壤扰动量的比值即比阻SDF为评价指标，使用响应面试验方法，综合深松土壤的扰动量与深松铲的牵引阻力进行优化分析，最终确定凿式深松铲加压1.2Mpa气孔位置在上部时为相对最优的深松铲。