【摘要】：現(xiàn)在世界上主要有三大煉鋼方法,即氧氣轉(zhuǎn)爐、平爐、電爐。氧氣轉(zhuǎn)爐煉鋼法占現(xiàn)在鋼產(chǎn)量中的絕大部分比重,保證氧氣轉(zhuǎn)爐正常運轉(zhuǎn)的前提之一就是合理的設計轉(zhuǎn)爐傾動裝置。轉(zhuǎn)爐傾動裝置的工作條件是大扭矩、低轉(zhuǎn)速、啟動、制動頻繁,所以為了改善減速機構中輪齒的受力狀況和增強設備的可靠性一般采用多點嚙合柔性傳動裝置。多點嚙合柔性傳動裝置一般為4套初級減速器提供動力,將動力傳給末級減速器,末級減速器大齒輪驅(qū)動耳軸從而使連接在耳軸上的轉(zhuǎn)爐轉(zhuǎn)動。為了改善整個系統(tǒng)的受力狀況對傳動裝置加裝一套柔性傳動裝置。本文在分析了國內(nèi)外現(xiàn)有的轉(zhuǎn)爐傾動裝置的研究現(xiàn)狀后,確定了初級減速器為三環(huán)減速器的多點嚙合柔性傳動裝置。由于三環(huán)減速器的大減速比、高效率、結構對稱等優(yōu)點其將改善初級減速器為多級普通直齒輪減速器所帶來的弊端。 本文首先將根據(jù)轉(zhuǎn)爐的公稱容量200噸,計算傾動過程中的轉(zhuǎn)爐所需的力矩變化曲線,并根據(jù)力矩變化曲線計算傾動過程中所需的最大傾動力矩。根據(jù)最大傾動力矩來設計整套多點嚙合柔性傳動裝置的主要參數(shù)。其中將主要通過編程選擇三環(huán)減速器的變位系數(shù);通過對三環(huán)減速器的原理及功率流的分析確定三環(huán)減速器各軸的設計。在完成基本參數(shù)的設計之后,將借助于Pro/E建立虛擬樣機進行運動學分析。然后將對整套系統(tǒng)建立動力學模型,分析其固有特性。然后對減速器的箱體做模態(tài)分析,得到箱體的固有頻率。最后將對柔性傳動構件扭力桿做靜態(tài)和動態(tài)分析,并對耳軸及托圈做靜態(tài)分析。 本文通過深入分析多點嚙合柔性傳動裝置的功能設計要點,給出了一種其主要參數(shù)的設計方法,并通過對200噸氧氣轉(zhuǎn)爐傾動裝置的設計加以實現(xiàn)。在完成該設計后,對其進行了運動學分析以驗證該裝置的運動學性能是符合使用要求。本文首次對初級減速器為三環(huán)減速器的多點嚙合柔性傳動裝置進行了動力學分析,并得到其固有特性。然后對減速箱體做模態(tài)分析得到其低頻率特性,因此理論上來說可以避免由傳動系統(tǒng)異常激振或鐵水激振所帶來的共振。之后借助于ANSYS對柔性傳動構件扭力桿做了靜態(tài)分析,并通過能量變換分析了其動態(tài)性能,最后通過分析得到扭力桿上的最危險截面位置。對耳軸和托圈的強度校核,驗證了設計的合理性。
[Abstract]:Now there are three main steelmaking methods in the world, namely oxygen converter, open-hearth furnace and electric furnace. Oxygen converter steelmaking method accounts for most of the steel output at present. One of the prerequisites to ensure the normal operation of oxygen converter is to design the converter tilting device reasonably. The working conditions of converter tilting device are large torque, low speed, starting and braking frequently, so in order to improve the force condition of gear teeth in deceleration mechanism and enhance the reliability of the equipment, multi-point meshing flexible transmission device is generally adopted. The multi-point meshing flexible transmission device generally provides power for four sets of primary reducers, and transfers the power to the final reducer, which is driven by large gears to rotate the converter connected to the ear shaft. In order to improve the mechanical condition of the whole system, a set of flexible transmission device is installed. After analyzing the present research situation of converter tilting device at home and abroad, this paper determines that the primary reducer is a multi-point meshing flexible transmission with three-ring reducer. Due to the advantages of large deceleration ratio, high efficiency and symmetrical structure of the three-ring reducer, it will improve the malpractice of the primary reducer for the multistage ordinary spur gear reducer. In this paper, the torque change curve of converter during tilting process is calculated according to the nominal capacity of 200 tons of converter, and the maximum tilting moment is calculated according to the curve of torque change. According to the maximum tilting moment, the main parameters of the whole set of multi-point meshing flexible transmission are designed. The modification coefficient of the three-ring reducer will be selected mainly by programming, and the design of each shaft of the three-ring reducer will be determined by analyzing the principle and power flow of the three-ring reducer. After the design of the basic parameters is completed, the kinematics analysis of the virtual prototype will be carried out with the help of Pro/E. Then the dynamic model of the whole system is established and its inherent characteristics are analyzed. Then the modal analysis of the reducer box is carried out, and the natural frequency of the box body is obtained. At last, the static and dynamic analysis of the torsion rod of flexible transmission component, and the static analysis of the ear shaft and bracket ring are done. In this paper, a design method of the main parameters of multi-point meshing flexible transmission is presented by analyzing the key points of function design, and the design of 200 ton oxygen converter tilting device is realized. After completing the design, the kinematics analysis is carried out to verify that the kinematics performance of the device meets the requirements of application. In this paper, the dynamic analysis of multi-point meshing flexible transmission with three-ring reducer for primary reducer is carried out for the first time, and its inherent characteristics are obtained. Then the low frequency characteristic of the reducer is obtained by modal analysis, so the resonance caused by abnormal excitation of transmission system or hot metal excitation can be avoided theoretically. Then the static analysis of the torsion bar of flexible transmission member is made by means of ANSYS, and its dynamic performance is analyzed by energy transformation. Finally, the most dangerous section position on the torsion bar is obtained by analysis. The rationality of the design is verified by checking the strength of the ear shaft and bracket.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：TH132.4

【引證文獻】

相關期刊論文 前1條

1 張鑫;;全懸掛轉(zhuǎn)爐傾動裝置優(yōu)化設計分析[J];科技視界;2013年21期

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本文編號：2394730