自走式杂交构树收割机设计及试验

Design and Experiment of Self-propelled Hybrid Broussonetia papyrifera Harvester

对杂交构树(Broussonetiapapyrifera)树干下部的枝条进行切割特性试验,测得其木质部剪切强度(4.98±0.52)MPa,韧皮部剪切强度(15.99±4.47)MPa。研究了基于ANSYS/LS-DYNA模拟仿真锯片切割杂交构树枝条的动态过程,确定了3~5km/h作业行走速度下理论最佳切割线速度60m/s,开发了适合杂交构树低损平茬、工作割幅2m的双圆盘锯割台。为解决收割过程中杂交构树生物量不均匀引起的喂入负荷不均匀问题,设计开发了喂入负荷自动监控、行走作业速度自动匹配调控系统和智能控制装置。试验及性能测试表明,研制的自走式杂交构树收割机能满足作业速度根据喂入负荷自适应调控和低损平茬收割的要求。

Cutting characteristics of lower branches of hybrid Broussonetia papyrifera were tested.Shear strength of its xylem was measured to be about(4.98±0.52)MPa,and shear strength of its phloem reached(15.99±4.47)MPa.Dynamic process of cutting hy-brid Broussonetia papyrifera stems with a simulated saw blade based on ANSYS/LS-DYNA was studied,and theoretical optimal cutting line speed has been determined to be 60 m/s at a walking speed of 3 km/h to 5 km/h.A dual disk saw cutting table suitable for low loss stubble leveling of hybrid Broussonetia papyrifera with a working cutting pair of 2 meters was developed.In order to solve problem of uneven feeding load caused by uneven biomass of hybrid Broussonetia papyrifera,an automatic feeding load monitoring and walking speed matching control system and an intelligent control device were designed and developed.Through field experiments and perform-ance tests,self-propelled hybrid Broussonetia papyrifera harvester developed could meet requirements of adaptive control of operating speed based on feed load and low loss flat stubble harvesting.