锻压技术

高压大流量液压系统设计中的关键因素

英文标题：Key points of high pressure and high flow rate system in hydraulic system design

作者：王琳

分类号：TH137.7

出版年,卷(期):页码：2016,41(8):104-109

摘要：

对锻造设备中所应用到的高压大流量液压系统在设计过程中因液体可压缩性所产生的影响进行了论述，得出实际需要的流量要大于在空行程过程中的流量，在本文的实例中此数值相差高达30%以上。此外，通过阐述油液可压缩性对卸荷冲击的影响，得出在通过固定节流孔时流量和时间成线性关系，可以用来指导卸荷阀通径的选择。针对高压大流量液压系统，分析了入口节流、出口节流和溢流节流3种液压缸运动控制方式，阐明了不同的控制方式对系统的能量消耗、控制精度以及造价的影响。

The influence of fluid compressibility on high pressure and high flow hydraulic system design for forging equipment was discussed, and it was obtained that the real required flow in the hydraulic system during forging process was bigger than the flow needed during idle process, the difference value was up to more than 30%. Furthermore, according to the analysis on the influence of fluid compressibility on impact load, the linear relationship between flow and time going through fixed orifice was obtained in order to choose decompress valve diameter. For the high pressure and high flow hydraulic system, three different cylinder speed control methods were analyzed on inlet throttle, outlet throttle and relief throttle, and the influences of different control methods on energy consumption, control accuracy and cost were expounded.

基金项目：

中国中冶重大科技专项（0012013008）

王琳（1980-），男，博士，高级工程师

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