Indoor Environment Simulation And Experiment Study On A Novel Removable North Wall Greenhouse

Planting patterns of the crop in Hilly region is different from the northern plains region,especially in the hilly orchard area,because the terrain of hilly mountain is up and down,crops are planted relatively intensive,resulting in normal operation equipment and large transporter inaccessible,the manpower has become the main mode of operation,so how to design a small conveyor provided with high power,high stability,small conveyor become major problem.Currently the researches on hilly orchard conveyor are poor,this paper proposes a hilly orchard transporter with special layout,which can meet the above requirements.The technical route of this study is based on the hilly mountain orchard transportation present situation and existing problems,this paper proposes many technical problems which hilly orchard conveyor need overcome,designing target parameter of the transporter,the machine layout?power system,transmission system combined with the technical problems.In addition,this paper analyzes the driving stability of the machine,comprehensive performance test of prototype with Recurdyn multi-body dynamics software.The main results were as follows:1.After finishing measurement of gardening parameters,and get the result that the line spacing of hilly mountain orchard fruit trees are 6m,planting distance are 2m or so,most slopes Angle are 12°,height of trees are about 3m,as a result of gardening parameters,large transport aircraft can't work here,so I need a miniaturization for the traditional large transporter.Taking into account the size of the high-power engine and the engine placed in the right side of the front,the transmission system placed in front of the bias,the bias type of special layout for this engine can normally work in the small tracked vehicles in the hilly-intensive orchard.2.After finishing the special layout of the transporter,the offset of the center of gravity is large,the third chapter introduce a national standard method on measuring center of gravity and find the position of the center of gravity is on the right of the transporter,the specific gravity offset is that longitudinal offset machine ?y=36.2 cm,lateral offset?x=9.6cm,center of gravity height h=47.6cm.Because the machine is a transport machine,which can carry the relevant equipment,through the theoretical research focus on the law on adjusting gravity,it can place the gravity closer to the center of transporter to a greater extent by adjusting the placement of the operating equipment,founding that center of gravity offset for the transporter with lift is that longitudinal offset machine y=34.0cm,lateral offset x=9.1cm,center of gravity height h=30.1cm,the gravity offset is significantly reduced when compared to the transporter with no load,and the height of the center of gravity is also significantly reduced.3.By analyzing the stability of the prototype performance with the simulation of Recurdyn software and have finished tilting test.Simulation analysis concluded that the following results:the ground reaction force on the left side of the track is greater than on the right track for the transporter in the process of linear drive;The transporter can work steadily in 20° ascent stage;when transporter drive in 20° lifting,the transient peak tilting angle may be 36°;On 20° slope lateral road transporter can keep stable.After finishing the measurement of static tilting angle,the finding is that longitudinal limit tilting angle is 25.3°,transverse limit tilting angle is more than 30°.4.The comprehensive performance test of the prototype is designed.The following results of test is that it was shifted to the right after measuring the linear travel stability of the prototype,the offset of the straight line 35m is 2.83m,it cannot meet the requirements of hilly orchard run skew,after the lift is placed,gravity tends to be at the center of the prototype.At this time,the offset of the straight line is 35m,the linear travel offset is 1.1m,meet the work requirements;the slip rate of prototype is 1.55%when diving on the soil which moisture content is 24.79%,meeting the best slip rate of about 1%for the crawler walking system;when the prototype turns left to the utmost,minimum steering radius on the flat ground is 105.4cm,when turning right it is 102.5cm,and the minimum of working radius is 2.01m,it meet the whole target design parameters;The steering path is elliptical when the prototype fully turned on a 15°slope,when the prototype turns left on 15° slope,the minimum of long axis locus is 384.2cm,short axis is 302.7cm,when the prototype turns right on 15° slope,the minimum of long axis locus is 380.2cm,short axis is 299.0cm.Finally,the prototype do the test on a hillau orchard field,including the determination of soil absolute moisture content,the slope speed of the prototype slope,the test of the prototype,the test of the prototype slope,the cumulative working time of the prototype.After the field test,the results meet the prototype of the basic operating speed and design values,the prototype is in both load and load condition,in the orchard in the ditch ability between the trees are remarkble,in the slope on the horizontal movement is relatively stable without tipping phenomenon,just show a certain degree of side slip phenomenon.