20英尺双叉式液压升降台液压部分毕业设计.doc

东海科学技术学院 毕 业 设 计（论文） 学 院：东海科学技术学院 学生姓名：陈晓军 班 级：C04机械(3)班 专 业：机械设计制造及其自动化 指导教师：史晓敏 2008年 6月 5日 20英尺双叉式液压升降台液压部分设计 陈晓军 (东海科学技术学院,浙江 舟山 316004) 摘 要 针对空港自动化仓储用20英尺液压升降台的市场需求和技术背景，并汲取国内外液压升降台好的设计经验;在设计中采用油缸斜置剪刀式升降台结构,并对双叉式液压升降台的设备总体的构成、液压驱动系统及机械传动系统的技术进行了分析。 其中,还介绍了液压升降台的背景，详细分析和比较了液压升降台的各种传动方式及其优缺点，探讨了液压升降台的发展方向与趋势，阐述了机电液一体化技术在升降台机械领域的应用前景。再对液压驱动单元中主要技术作了详细的分析和说明。对液压同步控制进行了分类与比较，并对液压同步闭环控制的原理与其在液压升降台中的应用作了论述。在实际计算说明过程中，对电液比例控制在系统中的功能和作用进行了说明，重点分析了采用电液比例同步控制系统的同步误差与阀控马达回路的动态特性，并讨论了液压系统性能参数与机械传动设计的关系。同时，对液压泵站的设计,包括液压油箱、液压泵装置及液压控制装置三大部分进行分析。并对液压升降台密封系统选择和设计。这样保证了设备的总体的稳定性，提高了设备的可靠性，得到了比较理想的结果。 关键词: 双叉式; 液压升降台；液压系统; 同步控制；液压泵站 Abstracts To meet airport automation warehousing with the hydraulic lift table developments tendency and the request, and derives the domestic and foreign hydraulic pressure lift table good design experience ;this design uses the cylinder to tilt the structure scissors type lift table.,and to the bifurcation type hydraulic pressure lift tables equipment overalls constitution, the hydraulic pressure driving system and the mechanical drive systems technology has carried on the analysis. Thereinto, the history facts of hydraulic pressure lift table were discussed. features of various stageswere compared; the developing trends of it and the utilization of hydraulic driving system were discussed.in the hydraulic unit,it put a detailed description of it. thetechnic of hydraulic synchronic loop control were discussed. in the calculating process, the function of liquid proportion control was discussed, especially to thesynchronic control system and the dynamic characrter of synchronic error and themotor circuit. it also discussed the relationship between the hydraulic systemparameter and the transmission system.At the same time, to the hydraulic pressure pumping stations design, including the hydraulic fluid tank, the hydraulic pressure pump-unit and the hydraulic control installs three major part carries on the analysis. and to hydraulic pressure