300T液压机液压系统设计说明书.doc

300T液压机液压系统设计
摘要
液压机是一种以液体为工作介质,根据帕斯卡原理制成的用于传递能量以实现各种工艺的机器。液压机是一种锻压机械,它能完成调直、冷冲压、冷挤压等多种锻压工艺。液压机的结构形式很多,但通常由横梁、立柱、工作台、滑块和顶出机构等部件组成。本文为300T液压机液压系统设计,通过对液压机主缸及顶出缸进行工况分析,绘制其速度图和负载图。选择液压基本回路,拟定液压系统原理图,使主缸能完成快速下行、减速压制、保压延时、泄压回程、停止的基本工作循环,顶出缸能实现顶出、退回、浮动压边的动作,之后对液压系统控制过程进行分析。确定液压系统的主要参数,通过对压力、流量等参数的分析与计算,对泵、电机、控制阀等液压元件和辅助件进行了选择。本次设计采用了集成块,除去与泵或液压缸等的连接仍然采用管接头和管道以外,其它各元件之间的连接都通过集成块上的通道,其结构更为紧凑,体积也相对更小,重量也更轻,大大减少管件连接,从而消除了因油管、接头引起的泄漏、振动和噪声,并且液压系统安装、调试和维护方便,压力损失小,外形美观。另外对液压站进行了总体布局。通过液压系统压力损失和温升的验算,本文液压系统的设计可以满足液压机工作循环的动作要求,能够实现塑性材料的成型加工工艺。
关键词:液压机,液压系统,原理图,集成块,液压站
THE DESIGN OF 300T HYDRAULIC PRESS' HYDRAULIC SYSTEM
ABSTRACT
Hydraulic presses are machines that use liquid as working medium and are made according to the principle of PASCAL to deliver energy to achieve various processes. Hydraulic presses are metal forming machines which plete various forging technology such as alignment, cold forging, cold extruding and so on. Hydraulic presses have many structural forms but more often than not they posed of crossbeam, vertical post, work table, slide block and ejector parts. This paper is about the design of 300T hydraulic press's hydraulic system, though the condition analysis of the hydraulic press's main cylinder and ejection cylinder, we can draw their velocity diagrams and load diagrams. Then we choose basic hydraulic circuit to form the hydraulic system schematics. We must make sure the main cylinder plete the basic working cycle of fast descending, deceleration repression, time delay of press forming, relinef-pressure return and stop, and on the other hand, ejection cylinder can realize the action of ejection, return and floating side pressing. After that, we must analyse the control process of the hydraulic system. Hydraulic system's main parameters are determined and through the analysis and calculation of pressure, flow and other parameters, and then we can go on the choose ponents and auxiliary parts such as pump , motor, filters, control valves. This design a