發(fā)布時間：2018-07-14 11:05

【摘要】：近些年，連鑄技術在鋼鐵行業(yè)已得到了廣泛的應用，其核心技術是連鑄機的拉坯速度，而結晶器是影響連鑄生產速度和質量的關鍵的設備，它的性能對連鑄機的生產能力和鑄坯質量都起著十分重要的作用。由計算機控制的電液伺服結晶器振動系統(tǒng)具有傳力均勻、運動平穩(wěn)、維護方便等特點。生產過程可改變振動曲線，并可在線設定振動波形，增加連鑄機可澆鋼種，，改善鑄坯表面與結晶器銅壁的接觸狀態(tài)，提高鑄坯表面質量并減少黏結漏鋼的現(xiàn)象。因此，由計算機控制的電液伺服結晶器振動系統(tǒng),是結晶器振動系統(tǒng)的發(fā)展方向。 本文結合國內外結晶器振動系統(tǒng)的發(fā)展現(xiàn)狀，設計了電液伺服結晶器振動液壓系統(tǒng)，涵蓋液壓系統(tǒng)設計、振動液壓缸設計及液壓缸可靠性研究三大內容。 首先，通過查閱大量國內外文獻，根據(jù)連鑄結晶器的使用要求，設計了結晶器振動液壓系統(tǒng)，介紹了系統(tǒng)工作過程，并對系統(tǒng)中的重要元件如液壓缸、伺服閥、溢流閥、蓄能器等進行了詳細計算與選型。其次，對系統(tǒng)中的液壓缸從防塵，防磨損等方面進行了創(chuàng)新性設計，在ANSYS環(huán)境下對缸體和活塞桿進行了有限元分析，并對液壓缸的階躍響應、頻率響應及動摩擦性能等方面也進行了測試與研究。再次，結合半年多的實習經歷對國內某知名液壓缸公司產品進行了可靠性與壽命調查，總結了油缸失效形式及生產過程中存在的問題，并就如何在生產過程中提高油缸可靠性進行了深入的分析。
[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.
【學位授予單位】：武漢科技大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH137.51

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