柑橘园仿形割草机切割器的设计与试验
Design and test of the orange garden profile mower cutter

针对山地柑橘园地形地貌复杂、一般刀盘难以作业的问题，设计了一种柑橘园仿形割草机切割器，该切割器采用让刀设计，具有避障功能，可降低障碍物对刀片的损害。通过理论分析和优化设计，建立甩刀对数螺线函数模型。通过台架试验和综合评分法分析得出切割器的最佳组合参数为：刀盘转速为1 900 r/min、刀刃长度为72 mm、刀片数量为4。试验结果显示，与正交试验组中最优值相比，切割器峰值扭矩降低0.38%，一次切割整齐率上升5.43%，所设计的柑橘园仿形割草机切割器满足山地柑橘果园的除草要求。
In view of the complex terrain of the mountain orangery and the difficulty of working on the cutterhead,an orange garden profile mower cutter was designed. The cutter adopted a free swinging knife design and had an obstacle avoidance function to reduce the damage which the knife is injured by the obstacle of orange garden. The logarithmic spiral function model of the file blade was established by theoretical analyses and optimization design. The multi factor test analysis of the cutter was carried out with bench test. The optimal combination of parameters including the cutter disk speed of 1 900 r/min,the blade length of 72 mm,the blades number of 4 were obtained with comprehensive scoring method. The verification test was carried out to verify the rationality and effectiveness of the test. Compared with the optimal value in the orthogonal test group,the peak torque decreased by 0.38%,and the uniformity of one cut increased by 5.43%. The test achieved the expected results and met the requirements for weeding in mountain citrus orchards