Authors

Abstract

In view of the problem of plant entanglement threshing roller in the process of mechanized flax harvesting, a comb-brush air-suction composite flax capsule harvesting test stand was designed based on the harvesting method of harvesting capsules independently and then breaking the capsules to thresh them. The following four parameters were selected as experimental factors: the shape of comb tooth cross-section, the rotational speed of comb roller, the relative speed of machine travel and the air volume of centrifugal fan. The following four indicators were chosen as the experimental indicators: capsule removal rate, capsule breakage rate, capsule collection rate and plant winding rate. A four-factor and three-level orthogonal test was conducted. The results showed that the optimal combination of test factors was as follows: the shape of comb tooth cross-section was rectangular, the rotational speed of the brush roller was 90 rad/min, the speed of machine travel relative to the plant was 80 mm/s and the air volume of centrifugal fan was 6000 m3/h. Under the condition of better experiment parameters combination, the capsule removal rate was 96.45%, capsule shell breaking rate was 98.79%, capsule collection rate was 95.65% and flax plants winding rate was 2.52%. The comb-brush air-suction composite flax capsule harvesting test bench provided the feasibility scheme for the problem of plant winding thresher roller and capsule collection.

Abstract in Chinese

针对亚麻（胡麻）机械化收获过程中植株缠绕脱粒滚筒问题，基于先独立收获蒴果、再对蒴果破壳脱粒的收获方式，设计了一种梳刷气吸复合式亚麻（胡麻）蒴果收获试验台。以梳齿截面形状、梳刷滚筒转速、机具行进相对速度、离心式通风机风量为试验因素，以蒴果脱尽率、破壳率、收集率、植株缠绕率为试验指标，进行四因素三水平正交试验。正交试验结果表明：较优试验因素组合梳齿截面形状为矩形、梳刷滚筒转速为90 rpm、机具相对植株行进速度为80 mm/s、离心风机风量为6000 m3/h；在较优试验因素组合作业条件下，蒴果脱尽率为96.46%、蒴果破壳率为98.91%、蒴果收集率为95.66%、植株缠绕率为2.52%。梳刷气吸复合式亚麻（胡麻）蒴果收获试验台提供了解决亚麻（胡麻）植株缠绕滚筒和亚麻（胡麻）蒴果收集问题的可行性方案。