沙柳材在人造板制造中存在嫩梢切断困难,功率不匹配、削片质量不佳等问题。结合沙柳的特性,设计并生产了沙柳试验削片机切削机构,寻找适合沙柳削片的最佳切削参数。通过计算沙柳切削阻力矩,设计驱动电动机功率为22 k W,降低了功耗;采用...沙柳材在人造板制造中存在嫩梢切断困难,功率不匹配、削片质量不佳等问题。结合沙柳的特性,设计并生产了沙柳试验削片机切削机构,寻找适合沙柳削片的最佳切削参数。通过计算沙柳切削阻力矩,设计驱动电动机功率为22 k W,降低了功耗;采用鼓式削片机铣削方式削片,对刀辊进行飞轮设计,使生产能力达到5 m3/h,提高了生产效率;采用单因子试验方法计算6种切削角度下的削片合格率,确定了当切削角度为45°时削片合格率较高,合格率可达72.45%,提升了削片质量。不仅验证了机器设计的性能,也为后期切削速度、进料速度的测定试验和新型沙柳削片机的设计提供了理论依据。展开更多
The article considers the impact of forestry machines on the soil of the cutting areas and presents the results of the impact of harvesters of different classes(middlesmall,middle and heavy)and configurations of wheel...The article considers the impact of forestry machines on the soil of the cutting areas and presents the results of the impact of harvesters of different classes(middlesmall,middle and heavy)and configurations of wheeled equipment and additional equipment on the soil of the cutting areas in the conditions of Kronoberg County(South of Sweden).Methods to reduce negative impact of wheeled harvesters on the soil of forests are proposed.The aim of the research is to assess the effect of the structural parameters of the wheel harvesters of different class on the soil of the cutting areas.Wheeled harvesters were loaded with 60 kN force.The results of experimental studies of the impact of wheeled harvesters on the forest soil are presented.Recommendations on the possibility of testing the results of research in the conditions of the rental base of the Western part of the North-Western Federal District of the Russian Federation are given.展开更多
林区道路崎岖,沟壑极多,壕沟是其中一种极限工况,跨越壕沟能力的高低反映了集材机通过性能的强弱。利用Solidworks和Recur Dyn软件对集材机虚拟样机及其可更换三角形履带行动装置进行建模,用Recur Dyn软件对集材机在不同预张紧力、速度...林区道路崎岖,沟壑极多,壕沟是其中一种极限工况,跨越壕沟能力的高低反映了集材机通过性能的强弱。利用Solidworks和Recur Dyn软件对集材机虚拟样机及其可更换三角形履带行动装置进行建模,用Recur Dyn软件对集材机在不同预张紧力、速度及工作状态(空载、装车和集材)下的跨越壕沟能力进行动力学仿真分析。研究结果表明:以预张紧力为24 k N(车重50%)跨越壕沟时,集材机运行更为稳定;预张紧力过大(38.4 k N)或过小(14.4 k N)均会导致履带断链。集材机在跨越壕沟时,速度不应低于14 rad/s,适当地提高速度有助于集材机跨越更宽的壕沟,但速度越大对履带性能要求也越高。多功能集材机空载时跨越的壕沟宽度不应超过900mm,装车时不应超过800 mm,集材时不应超过1 100 mm。展开更多
文摘沙柳材在人造板制造中存在嫩梢切断困难,功率不匹配、削片质量不佳等问题。结合沙柳的特性,设计并生产了沙柳试验削片机切削机构,寻找适合沙柳削片的最佳切削参数。通过计算沙柳切削阻力矩,设计驱动电动机功率为22 k W,降低了功耗;采用鼓式削片机铣削方式削片,对刀辊进行飞轮设计,使生产能力达到5 m3/h,提高了生产效率;采用单因子试验方法计算6种切削角度下的削片合格率,确定了当切削角度为45°时削片合格率较高,合格率可达72.45%,提升了削片质量。不仅验证了机器设计的性能,也为后期切削速度、进料速度的测定试验和新型沙柳削片机的设计提供了理论依据。
文摘The article considers the impact of forestry machines on the soil of the cutting areas and presents the results of the impact of harvesters of different classes(middlesmall,middle and heavy)and configurations of wheeled equipment and additional equipment on the soil of the cutting areas in the conditions of Kronoberg County(South of Sweden).Methods to reduce negative impact of wheeled harvesters on the soil of forests are proposed.The aim of the research is to assess the effect of the structural parameters of the wheel harvesters of different class on the soil of the cutting areas.Wheeled harvesters were loaded with 60 kN force.The results of experimental studies of the impact of wheeled harvesters on the forest soil are presented.Recommendations on the possibility of testing the results of research in the conditions of the rental base of the Western part of the North-Western Federal District of the Russian Federation are given.
文摘林区道路崎岖,沟壑极多,壕沟是其中一种极限工况,跨越壕沟能力的高低反映了集材机通过性能的强弱。利用Solidworks和Recur Dyn软件对集材机虚拟样机及其可更换三角形履带行动装置进行建模,用Recur Dyn软件对集材机在不同预张紧力、速度及工作状态(空载、装车和集材)下的跨越壕沟能力进行动力学仿真分析。研究结果表明:以预张紧力为24 k N(车重50%)跨越壕沟时,集材机运行更为稳定;预张紧力过大(38.4 k N)或过小(14.4 k N)均会导致履带断链。集材机在跨越壕沟时,速度不应低于14 rad/s,适当地提高速度有助于集材机跨越更宽的壕沟,但速度越大对履带性能要求也越高。多功能集材机空载时跨越的壕沟宽度不应超过900mm,装车时不应超过800 mm,集材时不应超过1 100 mm。
