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小型電動割草機刀盤變形試驗分析與仿真
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Simulation of Minitype Grass Trimmer’s Cutter Deformation
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    摘要:

    割草機刀盤的旋轉(zhuǎn)變形是導致其產(chǎn)生機械振動噪聲的主要因素之一,。利用高速數(shù)碼攝像機分別拍攝了割草機刀盤在無保護端蓋和有保護端蓋狀態(tài)下的旋轉(zhuǎn)變形圖像,，獲得了刀盤的高速旋轉(zhuǎn)變形曲線,，分析了產(chǎn)生變形的原因,；并在試驗的基礎上建立了刀盤的有限元模型,，通過ANSYS分析軟件,，模擬了刀盤的徑向變形情況，分析了徑向變形與刀盤結構和電動機轉(zhuǎn)速之間的關系,。減小刀盤大孔面積能使刀盤最大徑向位移減小(在12.000r/min時,，減小約30%)；維持電動機轉(zhuǎn)速在8.000r/min左右,，可使最大徑向位移不超過0.2mm,，刀盤運轉(zhuǎn)平穩(wěn),。

    Abstract:

    The cutter’s rotating deformation plays an important role which caused the vibration noise of grass trimmer. Highspeed video camera was applied to get the deformation images of grass trimmer’s cutter with protecting cover and without it. The tendencies and reasons of deformation were proposed. The finite element model of cutter based on experiment was established, the radial deformation was simulated by ANSYS, and the relations of the radial deformation between the cutter structure and rotational speed were analyzed. Reducing the area of big hole in the cutter could decrease the maximum radial deformation (in 12.000r/min, the value decreased by about 30%); Maintaining the motor speed at 8.000r/min around could control the maximum radial deformation below 0.2mm and keep a smooth moving. 

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單春賢,邵 霞,劉 濤,楊敏官.小型電動割草機刀盤變形試驗分析與仿真[J].農(nóng)業(yè)機械學報,2010,41(12):80-. Shan Chunxian, Shao Xia, Liu Tao, Yang Minguan. Simulation of Minitype Grass Trimmer’s Cutter Deformation[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(12):80-.

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