Wear Mechanism of Curved-Surface Subsoiler Based on Discrete Element Method

Abstract

The subsoiling technique in conservation tillage can effectively break the bottom plow layer and improve the tillage structure. But the wear problem of subsoiler is an important obstacle to the popularization of subsoiling. In this paper, the surface of the subsoiler is defined, and the subsoiling process of the curved-surface subsoiler with different speeds is simulate by discrete element method. By comparing with the actual subsoiler that wears heavily, the results shows that the main wear surfaces of the subsoiler are the upper surface and the front surface of the subsoiler tip, the front surface of the subsoiler-surface and the front surface of the subsoiler handle; the wear degree of subsoilers has a positive correlation with the work speed, wherein subsoiler handle has the greatest correlated with the speed.