氧气斜吹旋转转炉故障检测与诊断系统电磁屏蔽研究

发布时间：2018-11-21 13:20

【摘要】：氧气斜吹旋转转炉又称卡尔多炉,因其性能优越、工作效率高,在金属冶炼中越来越受到人们的关注和重视。由于其连续作业,负载较重,轴承容易出现故障。为了不耽误工期,需要了解轴承的运转情况,以便于对出现故障的轴承做到及时更换。氧气斜吹旋转转炉故障检测与诊断系统据此对轴承进行数据采集。机器运行的现场有大量的电磁干扰,对检测系统信号提取产生较为严重的干扰,使得检测系统对机器运作的真实性做出误判。因此,需要对检测系统中的敏感部分采取屏蔽措施,对抗干扰信号,保证采集到的数据具有真实性。本文研究的内容为检测系统屏蔽体的设计,主要采用了理论建模、数值分析、软件仿真的研究方法。为了便于研究屏蔽体形状、尺寸、屏蔽体壁厚之间的关系,本文使用磁标位法对圆柱形屏蔽体的屏蔽效能进行了数值分析,并将所得的结论推广到一般的屏蔽体计算当中。同时,本文还对孔缝的计算公式进行了分析,从理论上得出采用不同的孔形对屏蔽效能产生的影响不同。这样,在设计屏蔽体时,对于选择屏蔽体孔的形状、孔缝的面积有了更加直观清楚的认识。最后,本文对检测系统中的传感器进行了屏蔽体的设计,根据传感器的结构,综合考虑影响屏蔽体屏蔽效能的各种因素,并给出了设计屏蔽体的一般步骤。
[Abstract]:Because of its superior performance and high working efficiency, oxygen skew blowing rotary converter, also known as Kaldo furnace, has been paid more and more attention to in metal smelting. Because of its continuous operation, heavy load, bearing is prone to failure. In order not to delay the construction period, it is necessary to understand the operation of the bearing to facilitate the timely replacement of the faulty bearing. According to the fault detection and diagnosis system of oxygen rotary converter, the bearing data is collected. There are a large number of electromagnetic interference in the operation of the machine, which causes serious interference to the signal extraction of the detection system, which makes the detection system misjudge the authenticity of the machine operation. Therefore, it is necessary to protect the sensitive parts of the detection system against interference signals and to ensure the authenticity of the collected data. The research content of this paper is the design of the detection system shield, which mainly adopts the research methods of theoretical modeling, numerical analysis and software simulation. In order to study the relationship between the shape, size and thickness of the shielding body, the magnetic scalar method is used to numerically analyze the shielding effectiveness of the cylindrical shield, and the conclusions are extended to the general calculation of the shielding body. At the same time, this paper also analyzes the calculation formula of the aperture, and concludes theoretically that different hole shapes have different effects on shielding efficiency. In this way, when designing the shield, the choice of the shape of the shield hole and the area of the hole seam are more intuitively understood. Finally, the sensor in the detection system is designed in this paper. According to the structure of the sensor, various factors affecting the shielding effectiveness of the shield are considered synthetically, and the general steps of designing the shield are given.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TF06;TH165.3

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