Design And Test Of Dislocation Belt Clamping Cotton Stalk Puller

In order to reduce the missing pulling rate and breaking rate of cotton straw during the whole plant harvest,aiming at the planting mode of machine picking cotton in Xinjiang,taking cotton straw as the research object,this paper carried out the research on the key technology of clamping cotton straw whole plant extraction,carried out the mechanical analysis and kinematic analysis of the key components,made the machine prototype and carried out the field experiment.The main work of this paper is as follows:(1)The relevant physical properties of cotton stalks were tested,and well-grown cotton stalks were randomly selected from the test area.The average tensile failure load of the first batch of cotton stalks is3415.25 N,and the average tensile failure load of the second batch of cotton stalks is 2078.24N;the average tensile strength of the first batch is 48.63 MPa,and the average tensile strength of the second batch is 35.26 MPa.Among them,the first batch of cotton stalks had the highest moisture content at 35.7%,and the second batch of cotton stalks had the lowest moisture content at 23.6%.The flexural strength of the second batch of cotton stalks is the largest,which is 264.3N,and the flexural strength of the third batch of cotton stalks is the smallest,which is 138.8N.The soil moisture content is 12.6%,the lifting capacity is more than400 N,and the cotton stalk lifting capacity is large;when the soil moisture content is 13.8%,the cotton stalk pulling force is mainly between 300-550 N,and the cotton stalk pulling force is small;When the water content is 15.9%,most soil water content is below 500 N.The tensile strength of cotton stalks is positively correlated with water content.The research on the physical properties of cotton stalk provides important parameters for the design of cotton stalk extraction device,and lays a foundation for the design of cotton stalk extraction device.(2)In order to realize the whole selection of Cotton Straw,solve the problem of Straw shortage and high rate of broken plant,and realize the recovery and utilization of Cotton Straw,according to the way of cotton seed collection in Xinjiang,a kind of cotton Straw clamping transportation and seed drawing machine was designed.The stalk pulling device is designed,the movement of the stalk pulling device and cotton stalk is analyzed,and the speed and force analysis are carried out.The optimal angle range of the stalk pulling device is obtained.It is determined that the height of the divider on the ground is no more than300 mm,the width K of the divider is 350 mm,and the included angle of the sharp part of the divider is 35 °,which provides a basis for the manufacture and test of subsequent prototypes.(3)In this paper,the field experiment of clamping cotton pole puller is carried out.Through the pre-test,it can be seen that the forward speed,drawbar angle and driving wheel speed have a great impact on the performance index.The single factor test is carried out,and the forward speed,drawbar angle and driving roller speed are determined as the influencing factors.The field test is carried out.The three factor and three-level quadratic regression test is carried out with the vehicle speed,stalk pulling out angle and driving wheel speed as the influencing factors and the leakage rate and pulling out rate as the evaluation indexes.The experimental results showed that the influence of various factors on the cotton stalk pulling out rate was significant,and the order was driving wheel speed > pulling rod angle > forward speed;The significant order of the influence of each factor on the cotton stalk pull-out rate is forward speed > driving wheel speed > stalk pull-out angle.The optimized working parameter combination is: the forward speed is2.0km/h,the pull-out angle is 38.99 °,and the driving wheel speed is 281.24r/min.When the rotation speed of the machine is 280 r / min,the pull-out rate is 8.02%,and the pull-out rate is 280r/min.The pull-out rate and missing pull-out rate of clip type rod puller are low,the theoretical value is in good agreement with the experimental value,the relative error is less than 5%,and the parameter optimization model is reasonable.