铝锭转位全液压叉车及其位置控制系统的设计与研究

发布时间：2018-05-07 00:05

本文选题：液压叉车 + 液压马达　；参考：《兰州理工大学》2011年硕士论文

【摘要】：本课题以25t/h铝锭转位全液压叉车为研究对象,针对传统轮胎式人操作叉车转运过程存在的问题,在如何提高系统运行平稳性、零部件使用寿命、控制精度以及生产效率等方面进行了全面的分析。本文立足于满足转运叉车的运行平稳性,减少机器运行的故障,提高系统的响应速度和控制精度、便于维修,提高实际生产效率等要求。本文主要完成以下工作：首先根据铝锭转运全液压叉车的功能要求设计液压系统。以铝锭转运全液压叉车的工作状况及负载特性为依据,对整个系统进行运动学和动力学分析,根据实际工况的要求计算系统主要参数,对系统元件进行合理地选择。然后以铝锭连铸生产线液压叉车的叉车架体为研究对象,用三维软件Pro/E建立三维模型,将三维模型导入ANSYS建立有限元模型,对叉车架体进行线性静力分析和模态分析,分析叉车架体的变形及应力分布情况,找出变形及应力最大位置,提出叉车架体的改进方案,提高方案设计的可靠性。并且根据所建立的液压系统数学模型推导出系统的传递函数,并利用基于MATLAB的动态模型与系统仿真工具-SIMULINK对控制系统进行了动态特性分析和仿真实验。在对系统进行仿真过程中,充分考虑到系统在实际工作时的各种情况,设定仿真参数,进行仿真分析。最后对铝锭转运全液压叉车位置控制系统进行PLC方案设计,分别从系统主控制器的选择及铝锭转运叉车的定位控制方案两个方面进行设计。在本文中所提到的一些研究方法和结论将对今后铝锭转运全液压叉车产品的研制和开发提供理论参考。
[Abstract]:This subject takes 25t/h aluminum ingot transposition full hydraulic forklift as the research object, aiming at the problems existing in the transfer process of the traditional tire type man-operated forklift truck, how to improve the running stability of the system, and how to improve the service life of the parts and components. The control precision and production efficiency are analyzed comprehensively. This paper is based on the requirements of satisfying the smooth running of the forklift truck, reducing the faults of the machine running, improving the response speed and control precision of the system, facilitating the maintenance and improving the actual production efficiency. The main work of this paper is as follows: Firstly, the hydraulic system is designed according to the function requirement of aluminum ingot transfer full hydraulic forklift. Based on the working conditions and load characteristics of the fully hydraulic forklift truck for aluminum ingot transportation, the kinematics and dynamics of the whole system are analyzed, and the main parameters of the system are calculated according to the actual working conditions, and the system components are reasonably selected. Then taking the forklift frame of hydraulic forklift in aluminum ingot continuous casting production line as the research object, the three-dimensional model is established by using three-dimensional software Pro/E, and the three-dimensional model is introduced into ANSYS to establish the finite element model, and the linear static analysis and modal analysis of the forklift frame are carried out. This paper analyzes the deformation and stress distribution of forklift frame body, finds out the maximum position of deformation and stress, and puts forward an improved scheme for forklift frame body to improve the reliability of the scheme design. According to the established mathematical model of hydraulic system, the transfer function of the system is derived, and the dynamic characteristic analysis and simulation experiment of the control system are carried out by using the dynamic model based on MATLAB and the simulation tool of the system. In the simulation process of the system, the simulation parameters are set and the simulation analysis is carried out taking into account the various situations of the system in practice. Finally, the position control system of fully hydraulic forklift for aluminum ingot transfer is designed by PLC scheme, including the selection of the main controller of the system and the positioning control scheme of the forklift truck. Some research methods and conclusions mentioned in this paper will provide a theoretical reference for the research and development of fully hydraulic forklift truck products for aluminum ingot transfer in the future.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH242

【参考文献】