液压滚切剪液压系统的换向冲击分析  

Analysis of commutation impact in hydraulic system of hydraulic rolling shear

作　　者：马立峰[1,2] 韩贺永[1] 黄庆学[1] 王晶[1] 周研[1] 

机构地区：[1]太原科技大学重型机械教育部工程研究中心,太原030024 [2]吉林大学超塑性研究所,长春130022

出　　处：《吉林大学学报（工学版）》2012年第6期1396-1401,共6页Journal of Jilin University:Engineering and Technology Edition

基　　金：'973'国家重点基础研究发展计划项目(2011CB612204);国家自然科学基金项目(51105264);山西省自然科学基金项目(2010011036-2)

摘　　要：液压滚切剪的剪切机构,建立了液压缸的力平衡方程。通过求解液压缸换向前后的两腔压力,比较对称阀控制非对称缸和非对称阀控制非对称缸两种形式的压力冲击。通过仿真软件模拟两种形式的液压缸换向冲击,可以看出非对称阀控制非对称缸的换向压力冲击较小,符合理论计算的结果。依据仿真结果设计合理的液压系统,有利于设备的安全运行。通过采集现场样机液压缸的两腔压力,证实了采用非对称阀控制非对称缸的方法能够有效地解决液压缸的换向冲击问题。The pressure equilibrium equations in the hydraulic cylinder were derived for the hydraulic rolling shear according to its structure.The pressure impacts in 2 cases,the one uses a symmetric valve to control an unsymmetric cylinder,the other uses an unsymmetric valve to control an unsymmetric cylinder,were compared by solving the 2 chamber pressures before and after the commutation.The hydraulic commutation impacts in the hydraulic cylinders in both cases were simulated by software and it was found that the latter case is characterized by less impact than the former case,which is in good agreement with the results of theoretical calculation.An improved hydraulic system was designed based on the simulation results to improve the operation satety of the equipment.The collected in-situ data of 2 chamber pressures of a prototype shear proved that using an unsymmetric valve to control an unsymmetric cylinder can alleviate the commutation impact effectively.

关 键 词：液压传动与控制 液压系统模型 压力冲击 

分 类 号：TH137[机械工程—机械制造及自动化]