摘 要
液压传动技术是机械设备中发展最快的技术之一，特别是近年来与微电子、计算机技术相结合，使液压技术进入了一个新的发展阶段。由于液压技术具有传递效率高、系统结构简单、动作实现容易等突出优点，液压传动在工程机械中得到了广泛的应用。
本文首先对组合机床动力滑台液压系统进行工况分析，通过分析计算，绘制速度、负载循环图，初步选定液压缸工作压力，并计算液压缸尺寸以及各阶段流经液压缸的流量；其次根据液压系统供油方式、调速方式、速度换接方式来拟定液压系统图，并且对系统工作状态进行分析；再次通过对流经各元件的流量的计算，合理选择液压元件；最后通过对系统效率、发热和升温的验算，对液压系统进行性能分析。所设计的液压系统除了满足上述要求外，还必须符合体积小、重量轻、成本低、效率高、结构简单、工作可靠、使用和维修方便等一些公认的普遍设计原则。
关键词: 动力滑台；工况分析；液压系统；液压缸
Design of combination machine tool hydraulic pressure system
The hydraulic drive technology is one of the fastest-growing technologies in the mechanical equipment. Especially in recent years, hydraulic technology with microelectronics and computer technology combined, make the hydraulic technology has entered into a new stage of development. Hydraulic technology has high transfer efficiency, simple structure, action to achieve easy outstanding advantages. Hydraulic transmission has been widely applied in construction machinery.
Firstly this paper analyzes the working conditions of the hydraulic system of power sliding table in modular machine tools. The rendering speed and the graph of load circulation are obtained by the analysis and calculation, as well as the working pressure of hydraulic cylinders. Calculation for hydraulic cylinders is to get suitable cylinder size and the each stage flow of the hydraulic cylinder; Secondly protocolling the circuit diagram for hydraulic system is based on its oil mode, speed mode and the access mode of speed and analysis for the working conditions of hydraulic system. Calculation for the flow of hydraulic cylinders again is to choose the rational components; Finally analyzing for hydraulic system performance is to check the efficient and temperature of this system. In addition the above requirements should be met, the system must meet the principles including the small size, light weight .low cost, high efficiency, simple structure, reliable operation, convenient use, which are recognized as rational design principles.
Key words: power sliding; working conditions; hydraulic system; hydraulic cylinder
目 录
摘 要
Design of combination machine tool hydraulic pressure system
1 绪 论
1.1 液压传动的发展历史及发展前景
1.2 液压传动的优缺点
1.2.1 液压传动的优点
1.2.2 液压传动的缺点
1.2.3 液压传动的应用
2 组合机床动力滑台液压系统的工况分析
2.1 技术要求和设计参数
2.2 分析系统工况
2.2.1 工作负载
2.2.2 惯性负载
2.2.3 阻力负载
2.3 负载循环图和速度循环图的绘制
2.4 液压缸的设计
2.4.1 确定液压缸的主要尺寸
2.4.2 计算液压缸工作循环各阶段的压力、流量和功率
3 拟定液压系统原理图
3.1 液压传动系统的类型
3.2 速度控制回路的选择
3.3 换向回路和速度换接回路的选择
3.4 油源的选择和能耗控制
3.5 压力控制回路的选择
3.6 拟定液压系统原理图
4 液压元件的选择
4.1 确定液压泵和电机规格
4.2 阀类元件和辅助元件的选择
4.3 油管的选择
4.4 油箱的设计
5 液压系统性能的验算
5.1 估算系统的效率
5.2 系统发热和温升验算
6 液压元件的清洗、传动装置的总体设计及常见故障
6.1 液压元件的清洗
6.2 液压传动装置的总体设计
6.2.1 液压装置的总体布置
6.2.2 液压元件的配置方式
6.2.3 常见故障及排除方法
结 论
致 谢
参考文献
