基于AMESim的拖拉机液压提升系统压力冲击研究  

Research on pressure impact of tractor hydraulic lifting system based on AMESim

作　　者：王加攀 吴仁智[1] 秦磊 王昂 薛志飞[2] 史金钟[2] Wang Jiapan;Wu Renzhi;Qin Lei;Wang Ang;Xue Zhifei;Shi Jinzhong(School of Mechanical Engineering,Tongji University,Shanghai,201804,China;State Key Laboratory of Power System of Tractor,Luoyang Research Institute Co.,Ltd.,Luoyang,471039,China)

机构地区：[1]同济大学机械与能源工程学院,上海市201804 [2]洛阳拖拉机研究所有限公司,拖拉机动力系统国家重点实验室,河南洛阳471039

出　　处：《中国农机化学报》2021年第2期128-133,共6页Journal of Chinese Agricultural Mechanization

基　　金：拖拉机动力系统国家重点实验室开放课题资助项目(SKT2018001)。

摘　　要：为研究某款东方红拖拉机带辅助油缸的液压提升系统压力冲击特性,以其液压提升系统和悬挂机构作为研究对象,建立农具提升和降落时系统的物理、数学模型,利用AMESim软件建立液压系统的仿真模型,并对拖拉机样机进行测试验证模型的有效性。研究结果表明:农具提升时三组油缸无杆腔压力冲击仅为4.72 MPa,整个提升过程压力平稳;农具降落时强压油缸的压力冲击较大,有杆腔压力突增至23 MPa,若农具突然着地强压油缸有杆腔产生的压力冲击与农具重量成正比,回油管路内合适的的背压可有效避免农具降落过快。该方法对研究拖拉机带辅助油缸的液压提升系统性能具有指导意义,为进一步优化设计提供一种思路。In order to study the pressure impact characteristics of the hydraulic lifting system with auxiliary cylinder in a Dongfanghong tractor,taking the hydraulic lifting system and hitch mechanism as the research objects,the physical and mathematical models of the system during the lifting and dropping of farm tool are established.The simulation model of hydraulic system is established by AMESim software.The validity of the model is verified by testing the tractor prototype.The results show that the pressure impact of the three groups of oil cylinders without rod cavity is only 4.72 MPa when the farm tool is lifted,and the pressure in the whole lifting process is stable;when the farm tool is dropped,the pressure impact of the strong pressure oil cylinder is large,the pressure in the rod cavity suddenly increases to 23 MPa.If the farm tool suddenly lands on the ground,the pressure impact produced by the rod cavity of the strong pressure cylinder is directly proportional to the weight of the farm tool.Proper back pressure in the oil return pipeline can effectively prevent the tool from falling too fast.This method has guiding significance for studying the performance of the hydraulic lifting system with auxiliary cylinders and provides a way of thinking for further optimization design.

关 键 词：拖拉机 液压提升系统 悬挂机构 压力冲击 AMESIM 

分 类 号：S219[农业科学—农业机械化工程]