Power consumption analysis of the multi-edge toothed device for shredding the residual film and impurity mixture

• The mechanical characteristics of the mixture in different areas were analyzed. • The central group method and regression variance analysis was used. • The model between the key parameters and the power consumption is established; • The influence rule of key parameters on shredding power consumption was obtained. • Shredding test was used to verify the prediction accuracy of the theoretical model. The theoretical model for the power consumption of the device that shreds a mixture of residual mulch film and impurities was constructed using the theoretical method, and the key factors affecting shredder power consumption were obtained. Through a central composite design, regression analysis and analysis of variance, a relational model was constructed among the number of multi-edge toothed cutters, the clearance between multi-edge toothed cutters and between multi-edge toothed cutters and stationary blades, the speed of high-speed toothed rollers, the speed difference between high-speed and low-speed toothed rollers, and the shredding power consumption. Under the same key parameter values of the cutting device, the error between the predicted value of the shredding power consumption obtained from the model and the measured value of the verification test was 9.76 %, which proved that the established cutting power consumption model had good reliability. The research results can provide a theoretical basis for the research on the technology and equipment development for shredding the residual film and impurity mixture.