【摘要】 本文从犁铧在土壤中运动时的受力分析着手,研究分析了犁铧的几何参数(安装情况、刃口状况等)对其入土性能的影响。根据犁铧的磨损规律提出犁铧刃口自磨锐(自磨刃)的原理,并对多层材料犁铧(以堆焊耐磨层的犁铧为例)作了详细的分析。在既考虑力学状况又考虑磨损规律的条件下,分析得出一个能保证获得良好自磨锐的关于犁铧耐磨层层厚、支承层层厚、各层的相对耐磨性系数和土壤条件等诸因素之间关系的新公式。本文还详细分析讨论了耐磨层在犁铧正面和背面的情况,提出了估价其使用寿命的公式。更多还原

【Abstract】 Based on the analysis of the forces exerted on the ploughshare as the share moves in the ground, the relations of the penetrability of the share to the geometrie factors (such as the angles applied in the mounting of the share, the states of the edge, etc. ) are discussed in the present paper. The principle of ,the self-sharpening of the share edge is presented from the law of abrasion. And the detailed study of the share made of the multilayer materials (for example,by the bead welding or the plasma-spraying) is carried out. From conditions of mechanice and the law of abrasion, a new formula is deduced to obtain the good self-sharpening. This formula indicates the correlations among the factors including the thickness of the layers made of the high abrasion-resisting materials and the bearing materials, the relative coefficients of the abrasion-resistance between layers,and conditions of the ground. Besides, other new formulas are proposed to calculate the relative service life under the conditions of the layers made of the high abrasion-resisting materials on the face or the back of the share.更多还原