【摘要】 设计一种整秆式甘蔗收割机断尾机构.以ADAMS为试验平台,将"桂林一号"甘蔗物理特性作为参考值,通过四因素三水平虚拟正交试验研究断尾轮中心轴之间的距离、上下断尾元件之间的交错角度、断尾元件的弹性模量、断尾轮的转速研究断尾效果及机构能耗的影响.综合考虑能量消耗、断尾效果和各部位承受应力,较优参数组合如下:断尾轮中心轴之间的距离330mm、上下断尾元件之间的交错角度10°、断尾元件的弹性模量3.92 MPa、断尾轮的转速232r/min.此时甘蔗尾部承受的最大应力为8.56 MPa,达到尾部破坏条件,且其余部位最大应力值均远低于其表皮抗破坏强度值.按照较优参数进行整秆式甘蔗收割机断尾机构物理样机验证性试验,结果表明:该断尾机构合理可行,断尾率达到92.5%,理想断尾率达到87.5%,上、下断尾轮的平均功率为187 W.更多还原

【Abstract】 A tail-breaking mechanism for the whole-stalk type sugarcane harvester was designed.Virtual orthogonal tests of four factors and three levels were performed based on simulation software called ADAMS and physical properties of"Guilin-1"were taken as the reference values.Four factors were introduced in order to evaluate the performance of tail-breaking and energy consumption,including the distance between the central axis of the tail-breaking wheels,interleaved angle between the tail-breaking element,the elastic modulus of the tail-breaking element,and the rotate speed of the tail-breaking wheel.According to the energy consumption,the performance of tail-breaking and stress of each part,the optimal parameters of the mechanism were presented:the distance between the central axis of the tail-breaking wheels was 330 mm,the interleaved angle between the tail-breaking element was 10°,the elastic modulus of the tail-breaking element was 3.92 MPa and the rotate speed of the tail-breaking wheel was 232r/min.The maximum stress on the sugarcanes tail was 8.56 MPa under this circumstances,reaching the destruction condition,while the maximum stress value of the rest parts of the sugarcane were much lower than their skin antibreaking strength values.Finally,validation experiment was carried out under the optimal parameters condition by the physical prototype testing.Results show that the tail-breaking rate reaches 92.5%,the ideal rate is 87.5%,and the average power of tail-breaking wheel is 187 W,which proves that the physical pro-totype is feasible.更多还原