Design And Research Of In-Situ Tilling Plow Based On Facility Agriculture

Facility agriculture is a modern mode of agricultural production which has been developing vigorously in recent years.In view of the fact that rotation tillage method is not available in most tillage practices in facility agriculture,the lateral rifting characteristics of deep soil plough make a furrow always be left after tillage.Furrow will greatly affect the flatness of facility agriculture and even endanger the stability of greenhouses.Therefore,it is necessary to design an in situ soil plough without side drift in order to realize deep tipping without ditching.In this project,the invention and innovation design theory combined with the design method of reverse engineering and plough has been used to complete the overall design of the plough in place.The design theory of the body surface of the plough in place has been summarized and discussed,and the traction resistance of the plough in place has been studied.Based on TRIZ theory,the traditional plough was innovatively designed.The ploughing condition of the plough was analyzed by using TRIZ analysis tool.The reason for the lateral displacement of the mound caused by the mound plough wall was found to be the side pushing and buckling of the mound.The specific design scheme of “symmetric variation of the plow wall” is obtained by the substance-field model and the standard solution system.The three-dimensional data of the main body of a bt-25 plough-share plough were collected by an optical 3d scanner,and the Geomagic Wrap carried out point cloud processing to get the optimized respectable slice data of the plough.Using Geomagic Design X to reverse the design of the ploughing plow body,obtaining a smooth plow surface,designing the working parts such as the in-situ ploughing plow,the plow and the plunging side slab,and completing the three-dimensional model of the in-situ ploughing plough set up.Geomagic Design X was used to reverse design the plough body of the plough,and the smooth plough surface was obtained.The working parts such as plough holder,plough column and plough side plate were designed,and the three-dimensional model of the plough was established.In this paper,the prototype of the model was printed by 3D printing technology and the soil flume test was carried out.By analyzing the turning principle of the in-situ ploughing plough,combined with the shovel plow body surface design method,the design method of the in-situ ploughing plow body surface is established,that is,the soil turning method.This paper introduces the three main factors that need to be determined in the design of turning curved element method: the guiding curve,the changing law of element line angle and the changing law of turning curves.This paper briefly describes the five main steps of modeling the surface of the plough body with the method of turning the soil: drawing the ploughshare,determining the guide curve,drawing the contour line of the surface of the main plough body,drawing the curve line of turning the soil,forming the three-dimensional model.The traction resistance of the plough can be divided into two parts: the soil lifting resistance and the soil turning resistance.Based on the dynamic analysis of ANSYS/ LSDYNA,the change rule of traction resistance in the process of surplowing in situ is obtained:the traction resistance is gradually stable after the furrow breaking and the cutting plate reaching the local peak value.By analyzing the traction power consumption caused by different combinations of plowshares design parameters,the optimal combination of plowshares design parameters is obtained.