Due to the arid climate,flat terrain,certain irrigation sources and high popularization of mechanical harvest in Hexi Irrigation Area of Gansu Province,the widely adopted half film-flat-mulching for corn cultivation f...Due to the arid climate,flat terrain,certain irrigation sources and high popularization of mechanical harvest in Hexi Irrigation Area of Gansu Province,the widely adopted half film-flat-mulching for corn cultivation faces serious adverse situations,such as high soil compactness,strong film-soil adhesion,significant straw stubble and thick covering accumulation on film.Therefore,a new kind of segmented combination upper-side-discharge straw-returning and bundle self-unloading integrated corn residual film recycling machine was proposed.The scheme was characterized by small volume,low resistance,low complexity and film-impurities twice separation.It is constructed based on the concept of module subsection combination.It was composed of film surface straw cleaning device and the followed residual film recycling machine,in terms of function,any usage requirements of separate and joint operations can be satisfied.The film surface straw cleaning device is responsible for the removal of vertical corn straw and ground covering beyond the film.Although its stubble cutter roller obtuse-angle Lshaped blades paired single-helix arrangement is simple,it runs smoothly and the straw crushing effect is good enough.The layout that upper-side-discharge straw-returning cross-range screw conveyor auger is back and beyond the stubble cutter roller,eliminates the common connecting transportation mechanism between crushing and straw-returning section,so that,the system structure can be optimized and the efficiency has been significantly improved.The integrated residual film recycling machine is composed of triangular pyramid arc two-stage wing(TPATSW)type film lifting shovel,rod-tooth-belt type film-impurities separation device and semi-enclosed shaftless bundle film collector.Among them,TPATSW type film lifting shovel has good corn root whisker cutting effect,low soil contact resistance and small soil congestion area,but its ability to lift film is strong,more importantly,the special segmented configuration of shovel handle and the bo展开更多
研究了某型电机分段式转子铁心导条楔紧要求,采用刚度增强系统增加分段式铁心的整体刚度,保证分段铁心两侧冲片不出现散片和变形等不良问题,从而使导条楔紧深度及范围符合要求。运用轴向推力工装对导条进行推力试验,评估导条楔紧质量。...研究了某型电机分段式转子铁心导条楔紧要求,采用刚度增强系统增加分段式铁心的整体刚度,保证分段铁心两侧冲片不出现散片和变形等不良问题,从而使导条楔紧深度及范围符合要求。运用轴向推力工装对导条进行推力试验,评估导条楔紧质量。利用DEF O R M-3D有限元软件对导条楔紧过程进行数值模拟,分析导条和铁心的受力和变形情况。试验和仿真结果表明,运用刚度增强系统进行导条楔紧作业,在要求的推力作用下,导条与铁心未发生位移,分段铁心未发生散片等不良情况,导条楔紧效果满足使用要求。展开更多
基金the support of the Gansu Educational Science and Technology Innovation Project(Grant No.2021CYZC-25)the Gansu Science and Technology Planning Project(Grant No.21CX6NA081)+1 种基金the National Natural Science Foundation of China(Grant No.52165028)the Key Scientific and Technological Program of Gansu Province(Grant No.22ZD6NA046).
文摘Due to the arid climate,flat terrain,certain irrigation sources and high popularization of mechanical harvest in Hexi Irrigation Area of Gansu Province,the widely adopted half film-flat-mulching for corn cultivation faces serious adverse situations,such as high soil compactness,strong film-soil adhesion,significant straw stubble and thick covering accumulation on film.Therefore,a new kind of segmented combination upper-side-discharge straw-returning and bundle self-unloading integrated corn residual film recycling machine was proposed.The scheme was characterized by small volume,low resistance,low complexity and film-impurities twice separation.It is constructed based on the concept of module subsection combination.It was composed of film surface straw cleaning device and the followed residual film recycling machine,in terms of function,any usage requirements of separate and joint operations can be satisfied.The film surface straw cleaning device is responsible for the removal of vertical corn straw and ground covering beyond the film.Although its stubble cutter roller obtuse-angle Lshaped blades paired single-helix arrangement is simple,it runs smoothly and the straw crushing effect is good enough.The layout that upper-side-discharge straw-returning cross-range screw conveyor auger is back and beyond the stubble cutter roller,eliminates the common connecting transportation mechanism between crushing and straw-returning section,so that,the system structure can be optimized and the efficiency has been significantly improved.The integrated residual film recycling machine is composed of triangular pyramid arc two-stage wing(TPATSW)type film lifting shovel,rod-tooth-belt type film-impurities separation device and semi-enclosed shaftless bundle film collector.Among them,TPATSW type film lifting shovel has good corn root whisker cutting effect,low soil contact resistance and small soil congestion area,but its ability to lift film is strong,more importantly,the special segmented configuration of shovel handle and the bo
文摘研究了某型电机分段式转子铁心导条楔紧要求,采用刚度增强系统增加分段式铁心的整体刚度,保证分段铁心两侧冲片不出现散片和变形等不良问题,从而使导条楔紧深度及范围符合要求。运用轴向推力工装对导条进行推力试验,评估导条楔紧质量。利用DEF O R M-3D有限元软件对导条楔紧过程进行数值模拟,分析导条和铁心的受力和变形情况。试验和仿真结果表明,运用刚度增强系统进行导条楔紧作业,在要求的推力作用下,导条与铁心未发生位移,分段铁心未发生散片等不良情况,导条楔紧效果满足使用要求。
