Test And Analysis Of The Binding Force Among Stalk,Ear,Sheath,Leaf And Other Parts Of Millet

During the harvest operation,because of the characteristics of "heavy twirling of fine spike" of millet,the winding between the leaves and leaves,grain code and grain code,grain and grain will occur between the leaves and leaves,grain code and grain code,and grain and grain,which will reduce the efficiency of grain harvest and increase the grain loss.In order to solve the problem of winding between millet,two foxtail millet species,Jingu 21 and Zhangza10,were choosed to test the tensile force in leaves,leaf sheaths and leaf collar.The change rules of tensile load,tensile strength,breaking power consumption and other mechanical indexes was analyzed,which provides data support for improving the harvest efficiency of the combine harvester.The main work and conclusions are as follows:(1)Tensile test of blade binding forceThe leaves of foxtail millet were divided into three parts: leaf sheath,leaf and leaf collar.The tensile test of the binding force of the three parts at different internode positions(lower,middle and upper)showed that the mechanical index of leaf sheath > leaf mechanical index > leaf ring mechanical index,the mechanical index of upper part of Foxtail Millet > the mechanical index of middle part of Foxtail Millet > the mechanical index of lower part of foxtail millet.The tensile test of millet stem shows that the tensile strength of Jingu 21 is more than twice that of zhangza 10,the breaking power consumption of lower part of Jingu 21 is three times that of Zhangza 10,the tensile strength of lower and upper part of Jingu 21 is less than that of Zhangza 10,but the tensile strength of middle part of Jingu 21 is greater than that of Zhangza 10The maximum tensile loads of leaf ring,leaf sheath and leaf of Jingu 21 were 38.09 N,130.56 N and 59.02 N,and the minimum values were 11.12 N,37.46 N and 19.8N,with the average values of 21.25 N,87.21 N and 42.4N.The tensile loads of Zhangza 10 ranged from 7.38 to 32.97 N,30.83 to 130.91 N and 14.79 to 61.88 N.The average tensile loads of leaf ring,leaf sheath and leaf of Zhangza 10 were 19.56 N,81.49 Nand 43.56 N.The results showed that the ring tensile load of Jingu 21 was higher than that of Zhangza 10,the sheath tensile load of Jingu 21 was higher than that of Zhangza 10,and the leaf tensile load of Jingu 21 was lower than that of Zhangza 10.The tensile strength of Jingu 21 ranged from 3.01 MPa to 5.77 MPa,the tensile strength of leaf sheath ranged from 10.27 MPa to 25.6 MPa,the tensile strength of leaf ranged from 7.32 MPa to 15.46 MPa,and the average tensile strength of leaf collar,leaf sheath and leaf were 4.44 MPa,15.31 MPa and 11.69 MPa.The average tensile strength of leaf collar,sheath and leaf of zhangza 10 was 4.48 MPa,14.23 MPa and 12.67 MPa.The tensile strength of Zhangza 10 leaf collar > Jingu 21 leaf collar,Jingu 21 leaf sheath > Zhangza 10 leaf sheath,and Jingu 21 leaf < zhangza 10 leaf sheath.The average breaking power consumption of leaf collar,leaf sheath and leaf of Jingu 21 was 16.74 m J,77.32 m J and 41.63 m J.The average breaking power consumption of leaf ring,leaf sheath and leaf of Zhangza 10 was 12.96 m J,46.2m J and 37.62 m J.The breaking power consumption of Jingu 21 is higher than that of Zhangza 10.Jingu 21 leaf collar and leaf tensile load have a linear function relationship with millet internode,Jingu 21 leaf sheath tensile load has a quadratic function relationship with millet internode,Zhangza 10 leaf collar and leaf sheath tensile load has a linear function relationship with millet internode,Zhangza 10 leaf tensile load has a quadratic function relationship with millet internode.The breaking power consumption of Jingu 21 and Zhangza 10 is a linear function of millet internode.(2)Tensile test of binding force of grain and yardThe maximum tensile load of binding force of Jingu 21 is 21.13 N,the minimum is 5.84 N,and the average tensile load of binding force of Jingu 21 is 12.44 N.The maximum tensile load of Zhangza 10 is 17.99 N,the minimum is 8.08 N,and the average tensile load of Zhangza 10 is 11.52 N.The binding force tensile load of Jingu 21 was higher than that of Zhangza 10.The binding strength of Jingu 21 varied from 33.82 MPa to 132.26 MPa,with an average of 74.52 MPa.The maximum bond strength of Zhangza 10 was 88.06 MPa,the minimum was 40.16 MPa,and the average bond strength was 56.36 MPa.The binding strength of Jingu 21 was higher than that of Zhangza 10.The minimum breaking power consumption is 0.21 m J,the maximum is 2.27 m J,and the average breaking power consumption is 0.99 m J.The breaking power consumption of Zhangza 10 Valley code ranges from 0.22 m J to 1.12 m J,and the average breaking power consumption is 0.49 m J.The breaking power consumption of Jingu 21 is higher than that of Zhangza 10 from the top to the bottom.The results show that the binding strength,tensile load and breaking power consumption of Jingu 21 millet yard are linear functions with one variable,and the binding strength of Jingu 21 millet yard is cubic functions with one variable.The results show that the binding force,tensile load and binding strength of Zhangza 10 are quadratic functions with one variable,and the breaking power consumption of Zhangza 10 is quadratic functions with one variable.(3)Tensile test on grain binding capacity of gumaThe average tensile load of upper,middle and lower grains of Jingu 21 was 0.66 N,0.65 N and 0.58 N,respectively.The tensile loads of the upper,middle and lower grains of Zhangza 10 were 0.47 N,0.49 N and 0.43 N.Jingu 21 showed a decreasing trend from top to bottom,while Zhangza 10 showed a decreasing trend from top to bottom.The binding strength of upper,middle and lower grains of Jingu 21 was 26.66 MPa,26.62 MPa and 23.38 MPa.The grain bonding strength of Zhangza 10 was 17.97 MPa,18.47 MPa and 19.25 MPa.The grain binding strength of Jingu 21 decreased from top to bottom.The grain bonding strength of Zhangza 10 increased from top to bottom.