Authors

Abstract

Small, handheld furrow openers using rotary blades usually have limited power, making it necessary to minimise their operating power consumption, which mainly occurs with the soil throwing and movement of rotary blades. To this end, it is necessary to investigate the power consumption of such tillage implements, particularly the relationship between their power consumption and operating conditions based on soil movement patterns. In this study, we performed a field test of a furrow-opening rotary blade using round, physical tracers to monitor soil movement. The total power consumption of the rotary blade was positively related to the operating depth of the blade but was not related to the soil movement distance. The total power consumption peaked at 6.677 kW at a forward speed of 0.3 m/s, which was negatively related to the forward speed, but positively related to the soil movement distance. At a blade rotational speed of 340 rpm, the total power consumption peaked at 4.385 kW and was positively related to the blade rotational speed and soil movement distance. Therefore, it was concluded that by decreasing the rotary blade rotational speed and operating depth and increasing the forward speed, the power consumption of the unit working length can be reduced.

Abstract in Chinese

小型手扶式开沟机对所使用的旋转式开沟刀具有动力限制，因此需要减小开沟刀作业过程中抛撒与移动土壤的阻力，为了达到减小作业阻力的目的，对开沟刀作业过程中的土壤移动规律与开沟功耗进行研究。通过圆形示踪颗粒代替土壤，通过追踪示踪颗粒达到测定土壤移动规律的目的，再此过程中同时测定作业功耗，得到土壤移动规律与旋转式开沟刀作业功耗之间关系。通过试验可知，开沟刀作业功耗和开工深度呈正相关，与土壤移动距离无关。开沟刀在作业速度0.3 m/s时，作业功耗最大为6.677 kW；开沟刀在作业速度340 rpm时，作业功耗最大为4.385 kW。通过试验结果可知，当减小开沟刀旋转速度和开沟深度，增加开沟刀前进速度时，可使单位工作距离下，旋转式开沟刀作业阻力最小。