锻压技术

基于噪声声强最弱的泵控压机卸压特性研究

英文标题：Research of pressure-relief characteristics of pump-controlled press based on the weakest noise intensity

作者：艾超孔祥东刘胜凯王光平

单位：燕山大学

分类号：TH137.5

出版年,卷(期):页码：2013,38(6):80-85

摘要：

针对泵控压机液压系统卸压冲击问题，以0.6 MN泵控压机为载体，结合功率键合图进行研究，推导出基于噪声声强最弱的理论卸压曲线。搭建了比例变量径向柱塞泵（RKP）模型，并推导出工作缸模型、包含动态摩擦项的修正型分段集中参数管道模型及其它单元模型；以卸压过程中最大声强值最小为目标，运用拉格朗日中值定理，推导出理论卸压曲线；通过仿真对比卸压过程中理论、指数、线性和正弦卸压曲线下的主缸和卸压管压力曲线，并在0.6 MN泵控压机上进行实验研究。研究结果表明：基于键合图理论模型的仿真曲线与实测曲线吻合较好，并且理论卸压曲线具有较好的卸压效果，为减小卸压冲击提供了一种有效的新途径。

Point to the problem of pressure-relief shock for the hydraulic system in pump-controlled press, theoretical pressure-relief curve based on the weakest noise intensity was deduced with 0.6 MN pump-controlled press as a support incorporating power bond graph. The model of Proportion Variable Radial Piston Pumps (RKP) was established, while the working cylinder model, the sectional lumped parameter pipe model containing modified dynamic friction term and other unit models were deduced. Aim to obtain the minimum of maximum noise intensity during pressure relief process, the theoretical pressure-relief curve was deduced using Lagrange mean value theory. By simulating the main cylinder and pressure relief pipe pressure curve during pressure relief process under theory, exponential, linear and sinusoidal unloading curves were compared, and then experimentally studies were carried out on 0.6 MN pump controlled press. The results show that the simulation curve based on bond graph theory model matches actual curve well, in addition, the theoretical pressure-relief curve is of better pressure-relief effect, which is a new effective way for decreasing pressure-relief shock.

基金项目：

高等学校博士学科点专项科研基金(20101333110001) ;国家自然科学基金资助项目（51375422）;秦皇岛市科学技术研究与发展计划项目（201302A020）

参考文献：

［1］司玉校,谭建平,孙康.基于能量均匀释放原则的工作缸卸荷曲线研究[J].锻压技术，2012,37(1):91-94.Si Y X, Tan J P, Sun K. Research on working cylinder unloading curve based on principle of energy uniform release [J]. Forging & Stamping Technology, 2012,37(1):91-94.
［2］王丽薇,张亦工,高殿荣.大型快锻液压机卸压回路动态特性研究[J].机床与液压，2011,39(4):64-65.Wang L W, Zhang Y G, Gao D R. Research on dynamic characteristics of depressurized circuit in large fast forging hydraulic Press[J]. Machine Tool and Hydraulics，2011,39(4):64-65.
［3］刘新,姚平喜.高压容腔的卸压过程分析[J].液压气动与密封，2011,(5):29-31.Liu X,Yao P X. Analysis of releasing process for high pressure chamber[J]. Hydraulics Pneumatics & Seals，2011,(5):29-31.
［4］喜冠南,彭根运,颜国义,等.电控比例液压泵控通用液压机开环实验研究[J].液压与气动，2011,(7):65-67.Xi G N, Peng G Y, Yan G Y, et al. Open-loop experiment research of universal hydraulic press controlled by proportional variable pump[J]. Hydraulics &Pneumatics，2011,(7):65-67.
［5］李南,高永梅,吴小伟，等.液压机卸压冲击的研究[J].新技术新工艺，2009,(4):15-16.Liu N, Gao Y M, Wu X W, et al. Study of relieving impact on hydraulic press[J]. New Technique and New Technology，2009,(4):15-16.
［6］王中双,陆念力.基于键合图的多体系统耦合动力学的发展及现状[J].中国机械工程，2007，18（17）:2137-2141.Wang Z S, Lu N L. Development and present status of coupling dynamics for multibody systems based on bond graphs[J]. China Mechanical Engineering，2007，18（17）:2137-2141.
［7］田树军.液压系统动态特性数字仿真[M].大连:大连理工大学出版社,2012.Tian S J. Dynamic Simulation of Hydraulic Systems[M].Dalian: Dalian University of Technology Press,2012.
［8］朱勇,姜万录,杨超,等.第二类管道效应对电液伺服系统动态特性影响的研究[J].液压与气动，2013,(2):23-27.Zhu Y, Jiang W L, Yang C, et al. Dynamic characteristics study of electro-hydraulic servo system impacted by the second pipeline effect[J]. Chinese Hydraulics & Pneumatics, 2013,(2):23-27.
［9］周恩涛,高磊,赵亮.功率键合图在研究阀控缸液压冲击中的应用[J].机床与液压,2006,(11):124-125.Zhou E T, Gao L, Zhou L. The application of bond graph in researching hydraulic impact of cylinder controlled by valve [J]. Machine Tool and Hydraulics, 2006, (11):124-125.
［10］李洪人, 陈照弟.新的液压管路分段集中参数键图模型及其试验研究[J].机械工程学报，2000, 36(3):61-64.Li H R, Chen Z D. New sectional concentrated-parameter model using bond graph for hydraulic pipelines. [J]. Chinese Journal of Mechanical Engineering,2000, 36(3):61-64.

服务与反馈：

【文章下载】【加入收藏】