关键词: 桉树, 人工林, 清林装置, 结构形式, 关键参数, 仿真分析, 实验验证

Abstract: In order to protect the commercial forest resources and forest ecological environment in the north, people expanded the cutting of southern Eucalyptus plantation. For better harvesting the plantation, it is necessary to clean up the forestland before harvesting. So this paper designed and studied a new type of clearing device for forestland. The woodland cleaning device was mainly composed of cutter shaft, cutter head, cutter, etc.. The working head structure of forest clearing device was determined through analyzing the measurement data of tree spacing, weed and shrub species, shrub diameter and shrub density in the study area. Using the measured data, this paper analyzed and determined the key parameters: dimension parameters of the tool shaft, cutter head and cutter, speed of tool shaft and power consumption; and built SolidWorks model of forest land cleaning device. By transient analysis function of ANSYS, this paper simulated and analyzed the cutting tool, and made clear that the instantaneous stress and strain of cutting tool in cutting shrubs were well. ANSYS and Adams were used to analyze the model and dynamic balance of tool shaft, proving that the design of speed and size of tool shaft was reasonable. The results of analyzing cutter deformation indicated that cutter design was reasonable and within the prescribed range. Finally, the dynamic balance test of the cutter shaft and shrub cutting experiment on the prototype were all carried out. The results showed that the maximum effective vibration speed of cutter shaft was 0.13 mm/s and the maximum noise was 87.7 dB. The prototype could successfully cut within 16 shrubs, meeting all relevant standards and design requirements. The simulation and experimental results proved that the key parameters were correct and designed clearing device could complete the scheduled clearing work.

Key words: Eucalyptus, plantation, woodland cleaning device, structural style, key parameters, simulation analysis, experimental verification