结晶器振动液压系统设计与振动液压缸可靠性研究
发布时间：2018-07-14 11:05
【摘要】：近些年，连铸技术在钢铁行业已得到了广泛的应用，其核心技术是连铸机的拉坯速度，而结晶器是影响连铸生产速度和质量的关键的设备，它的性能对连铸机的生产能力和铸坯质量都起着十分重要的作用。由计算机控制的电液伺服结晶器振动系统具有传力均匀、运动平稳、维护方便等特点。生产过程可改变振动曲线，并可在线设定振动波形，增加连铸机可浇钢种，，改善铸坯表面与结晶器铜壁的接触状态，提高铸坯表面质量并减少黏结漏钢的现象。因此，由计算机控制的电液伺服结晶器振动系统,是结晶器振动系统的发展方向。 本文结合国内外结晶器振动系统的发展现状，设计了电液伺服结晶器振动液压系统，涵盖液压系统设计、振动液压缸设计及液压缸可靠性研究三大内容。 首先，通过查阅大量国内外文献，根据连铸结晶器的使用要求，设计了结晶器振动液压系统，介绍了系统工作过程，并对系统中的重要元件如液压缸、伺服阀、溢流阀、蓄能器等进行了详细计算与选型。其次，对系统中的液压缸从防尘，防磨损等方面进行了创新性设计，在ANSYS环境下对缸体和活塞杆进行了有限元分析，并对液压缸的阶跃响应、频率响应及动摩擦性能等方面也进行了测试与研究。再次，结合半年多的实习经历对国内某知名液压缸公司产品进行了可靠性与寿命调查，总结了油缸失效形式及生产过程中存在的问题，并就如何在生产过程中提高油缸可靠性进行了深入的分析。
[Abstract]:In recent years, continuous casting technology has been widely used in the iron and steel industry. The core technology is the casting speed of continuous casting machine, and the mould is the key equipment that affects the production speed and quality of continuous casting. Its performance plays a very important role in the production capacity and billet quality of the caster. The electro-hydraulic servo mould vibration system controlled by computer has the characteristics of uniform force transfer, steady motion and convenient maintenance. The vibration curve can be changed and the vibration waveform can be set on-line, the castable steel grade can be increased, the contact state between the billet surface and the mould copper wall can be improved, the surface quality of the billet can be improved and the phenomenon of sticking out steel can be reduced. Therefore, the electro-hydraulic servo mould vibration system controlled by computer is the developing direction of mould vibration system. According to the development of mould vibration system at home and abroad, this paper designs an electro-hydraulic servo mould vibration hydraulic system, including hydraulic system design, vibration hydraulic cylinder design and hydraulic cylinder reliability research. Firstly, according to the requirements of continuous casting mould, the hydraulic system of mould vibration is designed, and the working process of the system is introduced, and the important components in the system, such as hydraulic cylinder, servo valve, relief valve, are introduced. The accumulator is calculated and selected in detail. Secondly, the hydraulic cylinder in the system is innovatively designed from the aspects of dust-proof and anti-wear. The finite element analysis of cylinder body and piston rod is carried out under the environment of ANSYS, and the step response of hydraulic cylinder is analyzed. The frequency response and dynamic friction performance are also tested and studied. Thirdly, combined with more than half a year of practical experience, the reliability and life of a well-known hydraulic cylinder company in China were investigated, and the failure forms of the cylinder and the problems existing in the production process were summarized. And how to improve the cylinder reliability in the production process is analyzed.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.51
本文编号：2121443
[Abstract]:In recent years, continuous casting technology has been widely used in the iron and steel industry. The core technology is the casting speed of continuous casting machine, and the mould is the key equipment that affects the production speed and quality of continuous casting. Its performance plays a very important role in the production capacity and billet quality of the caster. The electro-hydraulic servo mould vibration system controlled by computer has the characteristics of uniform force transfer, steady motion and convenient maintenance. The vibration curve can be changed and the vibration waveform can be set on-line, the castable steel grade can be increased, the contact state between the billet surface and the mould copper wall can be improved, the surface quality of the billet can be improved and the phenomenon of sticking out steel can be reduced. Therefore, the electro-hydraulic servo mould vibration system controlled by computer is the developing direction of mould vibration system. According to the development of mould vibration system at home and abroad, this paper designs an electro-hydraulic servo mould vibration hydraulic system, including hydraulic system design, vibration hydraulic cylinder design and hydraulic cylinder reliability research. Firstly, according to the requirements of continuous casting mould, the hydraulic system of mould vibration is designed, and the working process of the system is introduced, and the important components in the system, such as hydraulic cylinder, servo valve, relief valve, are introduced. The accumulator is calculated and selected in detail. Secondly, the hydraulic cylinder in the system is innovatively designed from the aspects of dust-proof and anti-wear. The finite element analysis of cylinder body and piston rod is carried out under the environment of ANSYS, and the step response of hydraulic cylinder is analyzed. The frequency response and dynamic friction performance are also tested and studied. Thirdly, combined with more than half a year of practical experience, the reliability and life of a well-known hydraulic cylinder company in China were investigated, and the failure forms of the cylinder and the problems existing in the production process were summarized. And how to improve the cylinder reliability in the production process is analyzed.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.51
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