为了研究切纵流联合收获机脱粒分离装置的最佳结构参数和运动参数,对履带式切纵流联合收获田间试验机进行结构改进、载荷测试系统的构建和水稻田间试验,研究切流滚筒、纵轴流滚筒间隙和切流滚筒、纵轴流滚筒转速对脱粒总功耗、切流滚筒...为了研究切纵流联合收获机脱粒分离装置的最佳结构参数和运动参数,对履带式切纵流联合收获田间试验机进行结构改进、载荷测试系统的构建和水稻田间试验,研究切流滚筒、纵轴流滚筒间隙和切流滚筒、纵轴流滚筒转速对脱粒总功耗、切流滚筒功耗、纵轴流滚筒功耗和夹带损失率等性能的影响。并对总功耗和夹带损失率的数据进行二次多项式回归分析和复合型优化分析得到最佳参数配置:切流滚筒间隙为30.99 mm,纵轴流滚筒间隙为14mm,切流滚筒和纵轴流滚筒转速为892.95、848.95 r/min。试验表明,该参数组合下,脱粒总功耗39.03 k W,切流滚筒功耗11.72 k W,纵轴流滚筒功耗27.31 k W,夹带损失率0.50%。对切流滚筒和纵轴流滚筒下方脱出混合物分布进行了研究,为清选装置的设计与优化提供了依据。展开更多
The drum shearer and high pressure water jet combined cutting system is an effective technology to cut hard coal-rock, but one problem of the technology is the choice of pick and nozzle location parameters. In order t...The drum shearer and high pressure water jet combined cutting system is an effective technology to cut hard coal-rock, but one problem of the technology is the choice of pick and nozzle location parameters. In order to solve the problem, the process and mechanism of combined cutting arc studied and mining seepage catastrophe theory is used to construct the mathematic and physical model of combined cutting hard coal-rock. Based on the model and detailed analysis of combined cutting mechanism, the single pick and nozzle combined cutting test-bed is built to test the main pick and nozzle location parameters of drum shearer and water jet combined cutting system. Test results show that the best vertical distance between the pick-tip and nozzle center point is the sum of cutting thickness and proper target distance in the Y axial direction; the best horizontal distance is the length between pick-tip point and coal-rock surface bursting crack point in the X axial direction. The best incident angle of water jet should be the same as the bursting crack line＇s angle in theory, but considering other important factors comprehensively, it is more reasonable when the incident angle of water jet is 90°.展开更多
文摘为了研究切纵流联合收获机脱粒分离装置的最佳结构参数和运动参数,对履带式切纵流联合收获田间试验机进行结构改进、载荷测试系统的构建和水稻田间试验,研究切流滚筒、纵轴流滚筒间隙和切流滚筒、纵轴流滚筒转速对脱粒总功耗、切流滚筒功耗、纵轴流滚筒功耗和夹带损失率等性能的影响。并对总功耗和夹带损失率的数据进行二次多项式回归分析和复合型优化分析得到最佳参数配置:切流滚筒间隙为30.99 mm,纵轴流滚筒间隙为14mm,切流滚筒和纵轴流滚筒转速为892.95、848.95 r/min。试验表明,该参数组合下,脱粒总功耗39.03 k W,切流滚筒功耗11.72 k W,纵轴流滚筒功耗27.31 k W,夹带损失率0.50%。对切流滚筒和纵轴流滚筒下方脱出混合物分布进行了研究,为清选装置的设计与优化提供了依据。
基金Project(2012AA062104) supported by the National High Technology Research and Development Program of ChinaProject(201104583) supported by the Postdoctoral Special Funded Projects,China
文摘The drum shearer and high pressure water jet combined cutting system is an effective technology to cut hard coal-rock, but one problem of the technology is the choice of pick and nozzle location parameters. In order to solve the problem, the process and mechanism of combined cutting arc studied and mining seepage catastrophe theory is used to construct the mathematic and physical model of combined cutting hard coal-rock. Based on the model and detailed analysis of combined cutting mechanism, the single pick and nozzle combined cutting test-bed is built to test the main pick and nozzle location parameters of drum shearer and water jet combined cutting system. Test results show that the best vertical distance between the pick-tip and nozzle center point is the sum of cutting thickness and proper target distance in the Y axial direction; the best horizontal distance is the length between pick-tip point and coal-rock surface bursting crack point in the X axial direction. The best incident angle of water jet should be the same as the bursting crack line＇s angle in theory, but considering other important factors comprehensively, it is more reasonable when the incident angle of water jet is 90°.
