Design and test of cutting film and removal impurities device based on negative pressure conveying of water pump
To solve the technical problem that it is difficult to separate and recover the machine-collected film and impurities due to intertwining.According to the differences of suspension characteristics,shape size and shearing characteristics of the main components of the machine-collected film and impurities,a new method of separating and removing the miscellaneous material by swirl settlement,cutting film filtration and removing impurities under the negative pressure of the water pump was proposed,and the device of cutting film and removal impurities was innovatively designed.The mechanical characteristics of the device were analyzed theoretically,and a test device was built.The orthogonal test of three-factor,three-level quadratic regression was carried out,and a multi-objective response surface regression model was established,which was optimized and verified by experiments.The results show that the order of primary and secondary factors influencing the pass rate of broken film is:rotational speed of movable knife,gap width of fixed knife and radius of movable knife wall.The order of primary and secondary factors influencing the crushed film rate is:rotational speed of movable cutter,radius of movable cutter wall and width of gap of fixed cutter.For crushed film impurity rate:rotational speed of movable cutter,width of gap of fixed cutter and radius of movable cutter wall.When the rotating speed of movable cutter is 954 r/min,the width of gap of fixed cutter is 2.8 mm and radius of movable cutter wall is 80 mm,the crushed film rate is 88.80％and the crushed film impurity rate is 7.51％.The relative error between the optimized test result and the predicted value of model is less than 5％.The main conclusions can be used as reference for the study of cutting and separating methods and equipment of the machine-collected film and impurities.
agricultural machinemachine-collected film and impuritiescutting and separatingnegative pressure conveyingfiltration and removal impurities
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维普
