Design and experiment of side row cotton straw returning and residual film recovery combined machine

In order to meet the needs of 'containing increments' of residual film pollution control in Xinjiang cotton areas，and improve the problems of high power consumption，large dust，low residual film recovery rate，short unloading distance and poor separation effect of membrane stalk in the residual film recovery machine after autumn，a combined operation machine of side row cotton straw returning and residual film recovery was designed. At the same time，many operations were completed such as crushing cotton straw side returning，picking residual film，separating membrane miscellaneous，collecting and compressing，unloading and accumulation . The crushed cotton straw were transmitted to the membrane junction line by spiral stirrer. The depth limit roller was used to imitate the ground to ensure the stability of the stubble height and achieve the stability of the depth of the residual film pickup spring tooth into the soil. In the process of picking up residual films，wind cleaning was used to realize secondary cleaning in the process of picking up residual film and reduce the impurity rate of residual film after recycling. The recovered residual film was compacted by conveying device to improve the loading capacity. The main working parts were designed and analyzed，the functional principle of picking，unloading and compressing residual film were expounded，and the structure and working parameters of the main parts were determined. The response surface test of three factors and three levels was designed by using Design-Expert software. The results showed that the optimum operating parameters of the machine were as follows：the operating speed of the machine was 1.09 m/s，the stubble height was 9.37 cm，the depth of the spring-tooth into the soil was 4.07 cm，and the of cotton straw crushing qualified rate，the film picking up rate and the residual film impurity rate were 96.20%，88.48% and 12.00%，respectively. The rounded operation parameters were used for experimental verification. The test results showed that the cotton straw crushing qualified rate was 94.83%，the film picking up rate was 87.26%，and the residual film impurity rate was 12.23%. The test results showed that the error between the cotton straw crushing qualified rate，the film picking up rate and the residual film impurity rate and the theoretical optimization value was 1.4%， 0.3% and 1.9%respectively. The research methods and results can provide reference for the research of related equipment. © 2023 Editorial Board of Jilin University. All rights reserved.