4MKJ残膜回收机液压系统的优化研究

Research on Optimization of Hydraulic System of 4MKJ Plastic Film Recycling Recovery Machine

为了解决4MKJ残膜回收机作业后农膜的边膜残留量大的问题,并满足成捆率要求,优化改进了4MKJ残膜回收机液压系统。在茎秆粉碎装置两侧安装起膜盘用来提高残膜回收率,通过5组对称安装在机具两侧的油缸,实现茎秆粉碎装置、耙齿收膜装置和起膜盘的高度调整、卷膜板开合动作及卷膜皮带的调整;通过在打捆装置调节油缸进油路将先导式溢流阀和直动式溢流阀串联,使打捆装置调节油缸能够柔性补偿膜捆直径的扩张量并使用AutoCAD 2020软件绘制了液压系统原理图。在田间进行了打捆和残膜回收试验,对配套液压系统的4MKJ残膜回收机作业的成捆率和残膜拾净率进行统计分析,通过对比安装起膜盘与未安装起膜盘时的残膜回收率来评价边膜回收效果,并根据GB/T 14290-2008选择了成捆率作为评价打捆情况的指标。田间试验表明:成捆率可达96%,残膜拾净率可达94.2%,符合使用要求。使用起膜盘有效减少了边膜残留并提高残膜拾净率,4MKJ残膜回收机打捆装置的液压系统可保证膜捆的成捆率。

In order to solve the problem of large amount of side film of agricultural film after the operation of 4MKJ plastic film recovery machine,and to meet the requirements of baling success rate,optimize the hydraulic system of 4MKJ plastic film recovery machine.The disc used to dig film is installed on both sides of the stem crushing device to improve the recovery rate of residual film.The height adjustment of the stem crushing device,the raking tooth film collecting device and the disc used to dig film,the opening and closing action of the film rolling plate and the film rolling belt are realized through five sets of oil cylinders symmetrically installed on both sides of the machine.By connecting the pilot relief valve and the direct acting relief valve in series in the oil inlet of the regulating cylinder of the baling device,the regulating cylinder of the baling device can flexibly compensate the expansion of the diameter of the film baling.Using AutoCAD 2020 software to draw the hydraulic system schematic diagram.The baling and residual film recovery tests were carried out in the field.The baling success rate and residual film picking rate of the 4MKJ plastic film recycling recovery machine supporting the hydraulic system were statistically analyzed.The side film recovery effect was evaluated by comparing the residual film recovery rate when the disc used to dig film was installed with that when the disc used to dig film was not installed.According to GB/T 14290-2008,the baling success rate was selected as the index to evaluate the baling situation.Field experiment showed that the baling success rate was 96%and the residual film picking rate was 94.2%,which met the application requirements.The use of the disc used to dig film can effectively reduce the side film residual and improve the residual film picking rate.The hydraulic system of baling device of 4MKJ plastic film recycling recovery machine can ensure the baling success rate of film baling.