發(fā)布時間：2018-06-29 16:16

  本文選題：永磁磁力耦合器 + 軟啟動��； 參考：《煤炭科學研究總院》2017年碩士論文

【摘要】：永磁磁力耦合器利用導體盤與永磁體盤無接觸相對轉(zhuǎn)動,通過磁場穿過工作氣隙進行力矩和運動的傳遞,且可以通過調(diào)節(jié)兩盤之間的氣隙寬度來調(diào)整控制傳遞扭矩和負載速度。它具有結(jié)構(gòu)簡單、環(huán)境適應力強、節(jié)能環(huán)保、隔離振動傳遞、避免產(chǎn)生電力諧波和電磁干擾等優(yōu)點,現(xiàn)在已經(jīng)成功應用在電力、石油、化工等行業(yè),但在煤礦生產(chǎn)中的應用還不成熟。本文針對礦用帶式輸送機,對永磁磁力耦合器的設(shè)計與分析方法展開如下研究:(1)詳細綜述了永磁磁力耦合器的基本結(jié)構(gòu)特點和工作原理,根據(jù)煤礦上的工作狀況,參考現(xiàn)有永磁磁力耦合器的結(jié)構(gòu)和性能,對盤式永磁磁力耦合器展開詳細結(jié)構(gòu)分析和磁路設(shè)計。通過比較永磁體不同充磁方向?qū)S向氣隙的磁感應強度的影響,確定了永磁體的充磁方向應沿永磁體盤的軸向充磁。通過對不同永磁材料的比較和分析,最終選擇了釹鐵硼永磁體材料。(2)根據(jù)永磁磁力耦合器結(jié)構(gòu)特點和材料屬性進行電磁場分析,利用Ansoft軟件對永磁磁力耦合器建立三維模型并對模型進行有限元靜態(tài)、瞬態(tài)仿真,并針對不同因素對永磁磁力耦合器輸出轉(zhuǎn)矩的影響進行分析和研究。根據(jù)仿真分析結(jié)果對永磁磁力耦合器的各參數(shù)尺寸進行優(yōu)化。(3)根據(jù)傳熱學理論及永磁磁力耦合器的實際運行狀態(tài),利用Ansys Workbench軟件對永磁磁力耦合器進行穩(wěn)態(tài)溫度場計算及溫升情況分析,確保永磁磁力耦合器能夠安全可靠地運行。(4)針對大型帶式輸送機的技術(shù)要求,本文從礦用帶式輸送機的啟動曲線出發(fā),研究永磁磁力耦合器的軟啟動特性。通過給定的帶式輸送機的啟動速度曲線計算出永磁磁力耦合器的輸出端的轉(zhuǎn)速與轉(zhuǎn)矩隨時間的變化值,結(jié)合仿真得到的永磁磁力耦合器的氣隙與轉(zhuǎn)速的關(guān)系,最終得到永磁磁力耦合器的氣隙隨時間的變化情況。
[Abstract]:The permanent magnet magnetic coupler transfers the torque and motion through the working air gap by using the conductor disk and the permanent magnet disk without contact relative rotation, and can adjust the transfer torque and load speed by adjusting the air gap width between the two disks. It has the advantages of simple structure, strong adaptability to the environment, energy saving and environmental protection, isolation of vibration transmission, avoiding the generation of power harmonics and electromagnetic interference, and has been successfully applied in power, petroleum, chemical and other industries. But the application in the coal mine production is not mature. In this paper, the design and analysis methods of permanent magnet magnetic coupler are studied as follows: (1) the basic structure characteristics and working principle of permanent magnet magnetic coupler are summarized in detail, and according to the working condition in coal mine, the design and analysis method of permanent magnet magnetic coupler are studied as follows: (1) the basic structure and working principle of permanent magnetic coupler are summarized in detail. Referring to the structure and performance of the present permanent magnet magnetic coupler, the structure analysis and magnetic circuit design of the disc type permanent magnet magnetic coupler are carried out in detail. By comparing the effect of different magnetization directions on the magnetic induction intensity of the axial air gap, it is determined that the magnetization direction of the permanent magnet should be along the axial magnetization direction of the permanent magnet disk. Through the comparison and analysis of different permanent magnetic materials, the NdFeB permanent magnet material is finally selected. (2) electromagnetic field analysis is carried out according to the structure characteristics and material properties of the permanent magnetic coupler. The 3D model of permanent magnet magnetic coupler is established by using Ansoft software, and the finite element static and transient simulation of the model is carried out, and the influence of different factors on the output torque of permanent magnet magnetic coupler is analyzed and studied. According to the results of simulation analysis, the parameters of permanent magnetic coupler are optimized. (3) according to the theory of heat transfer and the actual operation state of permanent magnetic coupler, The steady-state temperature field calculation and temperature rise analysis of permanent magnet magnetic coupler are carried out by using Ansys Workbench software to ensure that the permanent magnet magnetic coupler can operate safely and reliably. (4) according to the technical requirements of large belt conveyor, Starting from the starting curve of mine belt conveyor, the soft start characteristics of permanent magnet magnetic coupler are studied in this paper. The speed and torque of the output end of the permanent magnet magnetic coupler are calculated by the given starting speed curve of the belt conveyor, and the relationship between the air gap and the rotational speed of the permanent magnet magnetic coupler is obtained by combining the simulation results. Finally, the air gap of permanent magnet magnetic coupler is obtained.
【學位授予單位】：煤炭科學研究總院
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TD528.1

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