High Speed And Large Inertia Sampling Device Dynamic Characteristics Of The Transition Process Analysis And Research

In order to ensure quality and efficiency of iron-making, enterprises must take a real online grain testing of all materials for a reasonable and efficient use. The veracity of grain testing result lies on accuracy of sampling specimen to a great extent. Requests of sampling technology become stricter with the developing industry technique. However, there are few special sampling equipments in our country. Lots of corporations adopt manual sampling, which results in great deviation to specimen and important influence to products. To improve product quality and enlarge economic effectiveness, iron corporations should design proper sampling equipment in their own conditions.A new-style online grain-testing system, which is designed for a new developing 5500m3 blast furnace in Caofeidian of Shougang Corporation and developed by Zhengzhou University and Xinxiang SIDA corporation, is introduced in this thesis. The system had obtained a national practical new-pattern patent license in Oct, 2007(patent sequence number: ZL200620130163.2), meanwhile, it is the initial practical system in national online grain-testing realm, and it has improved the efficiency and automatization during iron-making process. A high-speed and great inertia sampling equipment in the grain-testing system is studied, which has a simple configuration and high sampling efficiency, and is able to implement a uniform sampling during a short distance. Based on modeling and simulation, the dynamic performance during transient process is analyzed. According to experimental verification, principle and constitution of the equipment are feasible, and the system is proved to work well after designing. However, there are still some defects in the equipment, such as long starting-time and great impact during starting and braking periods. Therefore, theoretical analyses and experimental study of the equipment are essential.The research is summarized as follows:1) The integrated structure and operating principle of the equipment are explained in details, and a simple dynamical model is established to analyze the performances during transient process;2) Based on AMESim, simulation model is established; 3) Correct experimental method and system are designed due to experimental object, which are also used to verify and modify the simulation model;4) Based on correct simulation model, main parameters which influence dynamic performance of the system are listed out, and better alternatives are searched to make sure ideal transient process.According to analyses of the dynamic performance during transient process, quality of the equipment is improved greatly, and integrated performance is consummated. The research has important practical significance to grain testing systems and provides useful preferences to further study of similar systems.