Authors

Abstract

To address the challenges of high tillage resistance, high energy consumption, and suboptimal subsoiling performance associated with soil compaction management and conventional subsoiling operations, this study integrates gas-liquid two-phase jet soil-breaking technology with ultrasonic vibration drag reduction technology to design and develop an ultrasonic vibration-assisted gas-liquid two-phase jet subsoiler. With a subsoiling depth of 30 cm and an operating speed of 3 km/h selected as standard test conditions, a systematic investigation of the subsoiler’s operational performance was conducted using simulation modeling, soil bin tests, and field experiments. The study examined the variations in tillage resistance, soil disturbance area, and soil porosity. Experimental results indicate that, compared with conventional mechanical subsoiling, the combined application of ultrasonic vibration and gas-liquid two-phase jet reduces tillage resistance by 17.5% and increases the soil disturbance area by 7563.3 mm2. At a soil depth of 30 cm and a horizontal width of 30 cm, the maximum increase in soil porosity reaches 0.115 mm. Comprehensive analysis demonstrates that the ultrasonic vibration-assisted gas-liquid two-phase jet subsoiling technology significantly reduces tillage resistance, enhances soil disturbance, and improves soil pore structure, thereby offering a new technological solution for low-drag, high-efficiency subsoiling operations.

Abstract in Chinese

针对土壤压实治理与传统深松作业存在的耕作阻力大、作业能耗高、深松效果欠佳等问题，本研究融合气液两相射流破土与超声波激振减阻技术，设计并搭建了一款超声波激振气液两相射流深松机。选取深松深度30 cm、作业速度3 km/h为标准试验工况，采用仿真模拟、土槽台架试验与田间实地试验相结合的方法，系统测试并分析该深松机的作业性能，探究其耕作阻力、土壤扰动面积及土壤孔隙度的变化规律。试验结果表明，相较于传统机械深松方式，超声波激振与气液两相射流的组合深松技术，可使耕作阻力降低17.5%，土壤扰动面积增大7563.3 mm2。在土层深度30 cm、水平宽度30 cm处，土壤孔隙度最大提升量达0.115mm。综合分析表明，超声波激振气液两相射流复合深松技术能够显著削减耕作阻力、优化土壤扰动效果、改善土壤孔隙结构，为低阻高效土壤深松作业提供了新的技术方案。