【作者】 毛建军；

【导师】 黄建龙；

【作者基本信息】 兰州理工大学 ， 机械制造及其自动化， 2010， 硕士

【摘要】 本文来源于兰州理工大学和金川公司联合开发的阴极铜自动包装生产线,目前该生产线已经在金川公司成功运行,但铜包装线所使用的升降平台在工作过程中存在构件变形大、机身振动大、液压系统压力值大等缺点。本文针对这些缺点,以剪叉式液压升降平台为研究对象,对升降平台机械-液压综合系统进行静态、动态分析,并对液压缸的位置参数进行优化。本文主要进行了以下工作：首先,利用ANSYS软件对升降平台液压缸进行了静态分析,并对受载后液压油体积变化量和液压缸有效容积变化量进行计算,得到了升降平台液压系统的等效刚度。其次,在ANSYS中建立升降平台机械-液压综合系统的有限元模型,对其进行静态分析,得到了升降平台承载条件下各构件的变形云图。再次,对升降平台机械-液压综合系统的有限元模型进行动态分析。通过模态分析和谐响应分析得到了升降平台的前10阶固有频率、主振型图及谐响应曲线图；通过瞬态动力学分析,得到了受冲击载荷时升降平台的位移曲线、速度曲线、加速度曲线。最后,考虑到液压系统工作压力的大小对升降平台的综合性能有着重要影响,其值取决于升降平台上升过程中活塞的最大推力。本文利用C语言编制了优化程序,对液压缸位置参数进行了优化。优化后升降平台液压系统所需的工作压力减小了25.23%,活塞工作过程中的推力趋于平稳,这将在很大程度上改善液压升降平台的工作性能。通过本文的工作可以为后续同类设备的设计、开发提供一定的理论参考。更多还原

【Abstract】 "JNMC copper cathode plate automatic packing production line" is developed by Lanzhou University of Technology with JNMC. Currently, the system has been successfully run in JNMC. But the hydraulic lifting platform of copper cathode plate automatic packing production line suffers from many problems mainly including great deformation of components, serious fuselage vibration, high pressure level of hydraulic system. Address these shortcomings, static and dynamic analysis of the hydraulic scissor lift platform-hydraulic combination and the hydraulic jar’s position parameters optimization is carried out in this paper. The main work of this thesis are as follows:First, ANSYS finite-element software is used to static and dynamic analysis of the hydraulic lifting platform, the variation of the volume of hydraulic oil and the effective volume of hydraulic cylinders is calculated, the equivalent stiffness of Hydraulic lift platform is obtained.Secondly,ANSYS finite-element software is used to build the finite element model of the scissors hydraulic lift platform mechanical-hydraulic integrated system, followed by the system’s static analysis.By static analysis, the deformation cloud of deformation of the each component of lifting platform under certain loads is obtained.Thirdly,the dynamic analysis of the finite element model is done,by modal analysis and harmonic response analysis, the first ten rank of inherent frequency、main vibration mode diagram and harmonic response characteristic curve is developed. By transient dynamic analysis, curves of displacement、velocity、acceleration under impact loads are carried out.Finally,the hydraulic system’s working pressure of the hydraulic system has significant influence on its performance. The pressure value depends on the maximum push pressure of the piston during the lifting. C language is used to build optimization program, and the position parameters of the hydraulic jar is optimized. After the optimization, the working pressure of the lifting platform hydraulic system is reduced by 25.23%, and the pressure level is more stable, which indicates the certain extend of reduction of vibration during the lifting.Through this work, some theoretical reference will Provide for the design and development of Similar equipment in the future.更多还原