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Reached on Mechanics Action of Converter’s Self-adjusting Bolt Connection

Author: DongYuanLong
Tutor: KongJianYi；WangXingDong
School: Wuhan University of Science and Technology
Course: Mechanical Design and Theory
Keywords: Self-adjusting bolts Converter connected device Stress Analysis Contact analysis Stress Test
CLC: TF748.2
Type: Master's thesis
Year: 2009
Downloads: 67
Quote: 0
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Abstract


BOF steelmaking equipment, which the converter support system bear the full weight of the furnace and its attachments, also charged with tilting torque to the furnace so that it passes from the tilting mechanism is an important component of the converter machinery section. Furnace support system in the furnace with the trunnion ring connection device is one of the key link, the reliability of its work is directly related to the security and economy of production. This paper, 90 tons of a steel company steelworks converter self-adjusting bolt type converter coupling means for the study, analysis of the structure type and movement principle, determine the field BOF load variation, and numerical simulation study combined with CAE technology, in theory on the basis of analysis and calculation, further comparative analysis of self-adjusting bolt failure fracture of converter connection device designed to provide a practical method. Thesis work and the results are as follows: 1) its movement and mechanical analysis, explicitly in the converter bolt movement that may occur in the production process with the displacement of the form. Combined with actual production to determine the main load of a variety of conditions, including the static load of the furnace and the molten steel pour Moment frequent starting, braking, collision and impact loads, environmental thermal stress load and its variation, the final calculation of the three load distribution and the size of the group since the adjusting bolt, the analysis shows the most dangerous in the the steel port contralateral self-adjusting bolt force when the converter in a 60 ° tilt position, its maximum torque 1394.0627 KN? m. 2) further based on the finite element contact analysis, simulation and analysis of various typical conditions, combined with the latest theory of strength to check the state of stress assessment, analysis shows that the self-adjusting bolts in a steelmaking stresses in full working condition 97.4 Mpa ~~ 926.99Mpa range of change, and the maximum stress in the middle of the bolt body. This position in the actual production time is very short, basically meet the strength criteria and actual production, but because of the low stress safety factor, some optimization measures to increase the strength reserve. 3) self-adjusting bolt-site stress-strain tests, analysis of three self-adjusting bolt stress variation of the operating conditions, consistent with the finite element results to verify the correctness of the calculation model. The actual combined analysis of self-adjusting bolts Fracture and corresponding optimization measures. A comprehensive analysis of the mechanical behavior of self-adjusting bolt type converter to connect the device to use the process through the entire work of the thesis, some useful conclusions for similar converter to connect the device design analysis research platform.

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CLC: > Industrial Technology > Metallurgical Industry > Steelmaking > Steel-making furnaces > Converter
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