After analyzing the working condition of the conventional diesel forklift,an energy recovery system in hybrid forklift is considered and its simulation model is built.Then,the control strategy for the proposed energy ...After analyzing the working condition of the conventional diesel forklift,an energy recovery system in hybrid forklift is considered and its simulation model is built.Then,the control strategy for the proposed energy recovery system is discussed,which is validated and evaluated by simulation.The simulation results show that the proposed control strategy can achieve balance of the power and keep the state of charge(SOC) of ultra capacitor in a reasonable range,and the fuel consumption can be reduced by about 20.8% compared with the conventional diesel forklift.Finally,the feasibility of the simulation results is experimentally verified based on the lifting energy recovery system.展开更多
电动叉车因符合绿色产业发展趋势,具有零排放、噪声小等特点,近年来受到普遍的重视。由于减速箱对电动叉车的低噪声性能影响十分重要,文中通过对叉车减速箱中高速传动齿轮的噪声测试识别与分析,确定初级传动误差对减速箱振动带来的影响...电动叉车因符合绿色产业发展趋势,具有零排放、噪声小等特点,近年来受到普遍的重视。由于减速箱对电动叉车的低噪声性能影响十分重要,文中通过对叉车减速箱中高速传动齿轮的噪声测试识别与分析,确定初级传动误差对减速箱振动带来的影响,并采用Romax软件建立系统虚拟样机,运用系统模态分析方法,综合考虑箱体变形、轴承游隙等因素的影响,对齿轮传动进行了的动态特性仿真研究,并进行齿面微观修形的准确分析与对比,结果表明,合理的修形减小了齿轮的传动误差和轴承处的振动响应,减速箱的噪声降低了1.5-2.0 d B,并通过样机试验得到验证,该设计流程方法为产品的研发大大缩短了周期。展开更多
基金Project(2013BAF07B02)supported by National Science and Technology Support Program of China
文摘After analyzing the working condition of the conventional diesel forklift,an energy recovery system in hybrid forklift is considered and its simulation model is built.Then,the control strategy for the proposed energy recovery system is discussed,which is validated and evaluated by simulation.The simulation results show that the proposed control strategy can achieve balance of the power and keep the state of charge(SOC) of ultra capacitor in a reasonable range,and the fuel consumption can be reduced by about 20.8% compared with the conventional diesel forklift.Finally,the feasibility of the simulation results is experimentally verified based on the lifting energy recovery system.
文摘考虑门架变形、轮胎刚度阻尼以及车体惯性质量等参数的影响,搭建了基于VL motion的纵向动力学模型,结合门架液压系统模型建立基于AMESim与VL motion的联合仿真分析平台,辨识负载高位抖动/晃动工况中惯性力矩的时变特征,根据零力矩点理论(Zero Moment Point,ZMP)分析了叉车纵向堆垛的稳定条件。针对叉车纵向堆垛过程中由于液压系统冲击引起的失稳问题,设计了一种组合式液压缓冲装置。仿真结果表明,由于组合式液压缓冲装置的节流与吸能作用,减轻了负载运动状态变化所引起的液压系统冲击问题,提高了叉车纵向堆垛稳定性。
文摘电动叉车因符合绿色产业发展趋势,具有零排放、噪声小等特点,近年来受到普遍的重视。由于减速箱对电动叉车的低噪声性能影响十分重要,文中通过对叉车减速箱中高速传动齿轮的噪声测试识别与分析,确定初级传动误差对减速箱振动带来的影响,并采用Romax软件建立系统虚拟样机,运用系统模态分析方法,综合考虑箱体变形、轴承游隙等因素的影响,对齿轮传动进行了的动态特性仿真研究,并进行齿面微观修形的准确分析与对比,结果表明,合理的修形减小了齿轮的传动误差和轴承处的振动响应,减速箱的噪声降低了1.5-2.0 d B,并通过样机试验得到验证,该设计流程方法为产品的研发大大缩短了周期。
