DESIGN AND TESTING OF A WINGED SUBSOILER SHOVEL FOR STRIP MINIMUM-TILLAGE DEEP LOOSENING FERTILISER MACHINE

Résumé fourni par la source

To address issues such as soil compaction, plough layer damage, and hardpan formation caused by long-term use of rotary tillage and conventional ploughing, a winged subsoiler shovel was designed based on the soil characteristics of the black soil region in Northeast China. A mechanical contact model between the subsoiler shovel and soil was established to identify the design factors affecting the operational quality of the shovel. Using discrete element simulation technology, a shovel-soil interaction model was constructed. Through a quadratic regression rotational orthogonal design test, the effects of shovel structural parameters on soil disturbance area were determined. Taking the maximization of soil disturbance area as the objective, the shovel parameters were optimized. The optimal parameter combination was obtained as follows: shovel tip entry angle of 21°, wing inclination angle of 28°, and wing width of 104 mm, resulting in a maximum soil disturbance area of 1699.80 cm². A bench verification test was subsequently conducted, showing an actual soil disturbance area of 1666.08 cm². The test results were consistent with the simulation optimization results, confirming that the optimal parameter combination meets operational requirements and satisfies agronomic needs for deep loosening.

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