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  本文關(guān)鍵詞：蝶閥系統(tǒng)溫度場及其結(jié)構(gòu)研究　出處：《武漢科技大學》2012年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 蝶閥 執(zhí)行機構(gòu) 三維建模 有限元仿真

【摘要】：鋼鐵行業(yè)是國民經(jīng)濟中的重要支柱，為各類基礎(chǔ)建設(shè)提供必不可少的材料。由于目前經(jīng)濟發(fā)展步伐放緩，國家提出目前的主要工作是節(jié)能減排、降低能耗和轉(zhuǎn)變企業(yè)的經(jīng)濟結(jié)構(gòu)形式。蝶閥系統(tǒng)控制著加熱爐的溫度，然而蝶閥及執(zhí)行機構(gòu)因溫度過高，導致蝶閥系統(tǒng)控制精度變低，造成加熱爐溫度指標不穩(wěn)定、產(chǎn)品達標率下降和設(shè)備故障率較高。因此，本文提出對蝶閥系統(tǒng)熱傳遞機理進行研究，提出合理的蝶閥系統(tǒng)的溫度控制措施。通過蝶閥系統(tǒng)的三維建模與仿真分析，驗證了該措施的可行性。并于現(xiàn)場實施，統(tǒng)計現(xiàn)場改造后蝶閥及執(zhí)行機構(gòu)的溫度與故障率，說明了蝶閥系統(tǒng)溫度控制措施的有效性。 首先，指出某廠熱軋加熱爐熱空氣管道處的蝶閥及執(zhí)行機構(gòu)的溫度過高現(xiàn)象以及后果，著重分析了影響蝶閥系統(tǒng)溫度的四種直接因素，并提出相對應的溫度控制措施。根據(jù)該措施，對蝶閥及執(zhí)行機構(gòu)建立相應CAD/CAE三維仿真耦合模型。 然后，在Fluent軟件中利用順序耦合方法，計算了蝶閥及執(zhí)行機構(gòu)與空氣耦合模型的溫度場，對比之前溫度值，發(fā)現(xiàn)蝶閥系統(tǒng)的溫度控制措施能起到明顯的降溫效果。并在ANSYS中運用間接法，計算蝶閥及執(zhí)行機構(gòu)熱應力，結(jié)果顯示該措施下蝶閥及執(zhí)行機構(gòu)的熱應力均小于許用應力。還在Fluent中利用流體力學方法，仿真出管道內(nèi)部流場的分布，證明該措施不影響管道內(nèi)空氣流動特性。 最后，在現(xiàn)場進行蝶閥及執(zhí)行機構(gòu)的改造工作。對改造后的蝶閥及執(zhí)行機構(gòu)進行溫度測量和故障率統(tǒng)計，證明該措施能很好滿足于實際生產(chǎn)。 本文提出蝶閥系統(tǒng)的溫度控制三個措施，，并通過有限元軟件驗證蝶閥系統(tǒng)溫度控制措施的實用性和可靠性。在生產(chǎn)中，蝶閥系統(tǒng)的溫度控制措施的實施，降低了蝶閥及執(zhí)行機構(gòu)的溫度，降低了蝶閥系統(tǒng)的故障率，提高了熱軋加熱爐產(chǎn)品質(zhì)量。
[Abstract]:Iron and steel industry is an important pillar of the national economy, providing essential materials for all kinds of infrastructure. Because the pace of economic development is slowing, the state proposes that the main work is energy conservation and emission reduction. Reduce energy consumption and change the economic structure of the enterprise. Butterfly valve system controls the temperature of heating furnace. However, the butterfly valve and actuator control precision is lower because of the high temperature. The temperature index of reheating furnace is unstable, the product reaches the standard rate and the equipment failure rate is high. Therefore, the mechanism of heat transfer of butterfly valve system is studied in this paper. The reasonable temperature control measures of butterfly valve system are put forward. The feasibility of the measure is verified by the 3D modeling and simulation analysis of the butterfly valve system. The temperature and failure rate of the butterfly valve and its actuators were analyzed, and the effectiveness of the temperature control measures of the butterfly valve system was explained. First of all, it points out the phenomenon and consequence of the excessive temperature of butterfly valve and actuators in the hot air pipeline of a hot rolling furnace in a certain plant, and emphatically analyzes four direct factors that affect the temperature of butterfly valve system. The corresponding temperature control measures are put forward. According to this measure, the corresponding CAD/CAE three-dimensional simulation coupling model is established for butterfly valves and actuators. Then, the temperature field of the butterfly valve, actuator and air coupling model is calculated by using the sequential coupling method in Fluent software, and the temperature values before the model are compared. It is found that the temperature control measures of the butterfly valve system can significantly reduce the temperature, and the thermal stress of the butterfly valve and its actuator is calculated by indirect method in ANSYS. The results show that the thermal stress of butterfly valve and actuator is smaller than allowable stress. The distribution of flow field in pipeline is simulated by using hydrodynamic method in Fluent. It is proved that this measure does not affect the air flow characteristics in the pipeline. Finally, the revamping work of butterfly valve and actuating mechanism is carried out on the spot. The temperature measurement and failure rate statistics of the modified butterfly valve and actuators are carried out, which proves that the measure can satisfy the actual production very well. In this paper, three measures of temperature control of butterfly valve system are put forward, and the practicability and reliability of temperature control measures of butterfly valve system are verified by finite element software. In production, the temperature control measures of butterfly valve system are implemented. The temperature of butterfly valve and actuator is reduced, the failure rate of butterfly valve system is reduced, and the product quality of hot rolling heating furnace is improved.
【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】：TH134

【參考文獻】

相關(guān)期刊論文 前10條

1 劉健;李福堂;;基于Fluent的蝶閥三維流動的數(shù)值模擬及分析[J];遼寧科技大學學報;2008年Z1期

2 吳sッ

本文編號：1368554