【摘要】 为解决整体式往复切割器收割垅作大豆时,因割茬高参差不齐引起割台谷物损失的问题,将全地形切割技术应用到往复式切割器中。开展了具有分段式往复切割器和双自由度仿形机构的全地形收割装置的研究,利用费马定律求解了仿形力的极值,建立了切割器一垅台仿形力的数学模型。在作业状态下对刀床对垅台压力的极大值和极小值进行了评价,进行了田间试验。实验结果表明,刀床对垅台压力的极大值和极小值分别为102.84 N和32.28 N,表明切割器始终能紧贴垅台作业,且对垅台的压强均小于垅台彼时的极限压强;大豆割后平均割茬为43.7 mm,割台总损失率为1.90%,达到了作业质量标准要求,平均割茬和割台总损失率均优于整体式切割器。更多还原

【Abstract】 In order to solve the problems of grain losses in integral type reciprocating cutterbar when reaping ridge culture soybean,after the analysis of all-terrain reaping unit equipped with sectional type reciprocating cutterbar and two degree of freedom profiling mechanism,cutterbar-ridges profiling force mathematical model was established. A method to solve extreme value of profiling force was presented to fermat theorem. The maximum and minimum ridge pressure were evaluated on band knife cutting machine under working condition. These were102. 84 N and 32. 28 N respectively. The experiment results show that the average cutting is 43. 7 mm,total losing factor of reaping apparatu is 1. 90%,which indicates that the working quality standard request has been reached,the average and total losing factor of sectional type reciprocating cutterbar are better than integral one.更多还原