液压胶管内容积膨胀系数的研究

发布时间：2018-01-24 14:58

本文关键词： 液压胶管建模位移法内容积膨胀系数检测　出处：《振动.测试与诊断》2017年04期 　论文类型：期刊论文

【摘要】：胶管通常是液压自动厚度控制(automatic gauge control,简称AGC)、自动张力控制(automatic tension control,简称ATC)、弯辊等伺服或比例系统必须使用的元件,其内容积膨胀系数β为控制系统建模的关键参数,对建模精度影响较大,但以往内容积膨胀系数主要在70 MPa~350 MPa范围内取经验值,无法保证其准确性。为了解决此问题,首先,利用位移法分析推导了β值的数学模型;然后,设计了一种液压胶管β值的检测方法,由柱塞缸和待测液压胶管构成充满液压油的密闭容腔,通过加载系统使柱塞缸运动,实现密闭容腔内液压油的压缩及液压胶管的膨胀,由检测装置测算出密闭容腔内的体积及压力变化;最后,通过理论计算准确得到液压胶管内容积膨胀系数,为液压胶管的高精度建模奠定了基础。
[Abstract]:Hose is usually hydraulic automatic thickness control automatic gauge control. Automatic tension control automatic tension control, such as bending roll servo or proportional system must be used. The internal volumetric expansion coefficient 尾 is the key parameter of the control system modeling, which has a great influence on the modeling accuracy. However, in the past, the internal volume expansion coefficient mainly takes the empirical value in the range of 70 MPa~350 MPa. In order to solve this problem, the mathematical model of 尾 value is deduced by displacement method. Then, a testing method of 尾 value of hydraulic hose is designed, which consists of plunger cylinder and hydraulic hose to be tested to form a closed chamber filled with hydraulic oil, and the piston cylinder is moved by loading system. The compression of hydraulic oil and the expansion of hydraulic hose are realized, and the volume and pressure change in the chamber are measured by the measuring device. Finally, the volumetric expansion coefficient of hydraulic hose is accurately obtained by theoretical calculation, which lays a foundation for high precision modeling of hydraulic hose.
【作者单位】：东北大学轧制技术及连轧自动化国家重点实验室;
【基金】：国家自然科学基金资助项目(51274063) 中央高校基本科研业务费资助项目(L1507005)
【分类号】：TH137.5
【正文快照】： 1问题的引出胶管通常是轧机液压AGC,ATC和弯辊等伺服或比例系统必须使用的元件,在对液压系统进行高精度建模过程中须考虑胶管的影响[1-2]。国内外研究表明,胶管建模主要参数为胶管的长度、内径、外径和内容积膨胀系数[3-4]。除胶管的内容积膨胀系数以外,其他几个参数都容易获

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