【摘要】：永磁渦流耦合器作為一種工業(yè)傳動(dòng)裝置,因其具有獨(dú)特的傳動(dòng)原理,被廣泛應(yīng)用在石化、制藥、冶金等行業(yè)中。本文研究的是盤式永磁渦流耦合器,它不僅具有空載啟動(dòng)、運(yùn)行平穩(wěn)、對中精度要求較低等優(yōu)勢,更重要的是可以通過裝置上銅盤和永磁體盤的相對運(yùn)動(dòng)產(chǎn)生磁耦合力來實(shí)現(xiàn)無接觸傳動(dòng),并在改變氣隙間距下可以實(shí)現(xiàn)對輸出扭矩的調(diào)節(jié),達(dá)到節(jié)約能源、綠色環(huán)保的目的。由于國家和政府對能源利用率十分重視,因此,對永磁渦流耦合器的性能進(jìn)行分析就顯得尤為重要。本文則介紹以下幾個(gè)方面:首先,本文是對聚磁式永磁渦流耦合器進(jìn)行的研究,聚磁式的磁路結(jié)構(gòu)是普通磁路結(jié)構(gòu)的改進(jìn)和增強(qiáng)。在充分了解聚磁式永磁渦流耦合器的結(jié)構(gòu)和工作原理的基礎(chǔ)上,利用Ansoft有限元軟件進(jìn)行實(shí)體建模,并通過軟件對傳動(dòng)裝置的材料和邊界條件等進(jìn)行設(shè)置。其次,本文在利用有限元軟件建模的基礎(chǔ)上,分析了聚磁式永磁渦流耦合器在不同轉(zhuǎn)速差和結(jié)構(gòu)參數(shù)下對傳動(dòng)的扭矩、磁感應(yīng)強(qiáng)度和渦流損耗的影響。從分析中可得出,不同的轉(zhuǎn)速差和結(jié)構(gòu)參數(shù)對傳動(dòng)扭矩和磁感應(yīng)強(qiáng)度的影響幾乎是相同的,在氣隙和結(jié)構(gòu)相同時(shí),轉(zhuǎn)速差在500-700r/min時(shí),扭矩有最大值;在結(jié)構(gòu)和轉(zhuǎn)速差相同時(shí),氣隙越小則傳遞的扭矩越大;還可以看出,渦流損耗主要與轉(zhuǎn)速差和傳遞扭矩的大小有關(guān),在相同結(jié)構(gòu)和氣隙下,轉(zhuǎn)速差越大,則渦流損耗越大;但在轉(zhuǎn)速差恒定時(shí),則傳遞的扭矩越大時(shí),渦流損耗越大。再次,通過分析在相同氣隙不同轉(zhuǎn)速差下聚磁式磁力耦合器的不同結(jié)構(gòu)對傳遞扭矩的影響得出,在該聚磁式磁力耦合器最佳磁極數(shù)為10極,銅盤厚度為3mm,永磁體厚度為10mm,小磁角的充磁角度和氣隙則是越小越好;利用上面分析出的結(jié)構(gòu)參數(shù)的最佳值進(jìn)行建模,并通過有限元分析不同轉(zhuǎn)速差和氣隙下最佳結(jié)構(gòu)傳遞的扭矩值。最后,搭建試驗(yàn)平臺(tái)并對這個(gè)平臺(tái)的檢測系統(tǒng)工作原理進(jìn)行介紹。在更好的了解試驗(yàn)平臺(tái)的基礎(chǔ)上對最佳結(jié)構(gòu)下的聚磁式永磁渦流耦合器的傳動(dòng)扭矩進(jìn)行測量,分析其值與有限元分析計(jì)算的值的關(guān)系。
[Abstract]:As a kind of industrial transmission device, permanent magnet eddy current coupler is widely used in petrochemical, pharmaceutical, metallurgical and other industries because of its unique transmission principle. In this paper, the disk permanent magnet eddy current coupler is studied. It not only has the advantages of no load start, smooth operation, but also low requirement of middle precision, etc. What is more important is that the magnetic coupling force can be produced by the relative motion of the copper disk and the permanent magnet disk on the device, and the output torque can be adjusted by changing the air gap spacing, which can save energy and protect the environment. Because the state and government attach great importance to energy efficiency, it is very important to analyze the performance of permanent magnet eddy current coupler. In this paper, the following aspects are introduced: firstly, this paper studies the magnetic current coupler, the magnetic circuit structure of which is the improvement and enhancement of the common magnetic circuit structure. On the basis of fully understanding the structure and working principle of the poly-magnetic permanent magnet eddy current coupler, the solid modeling is carried out by using Ansoft finite element software, and the material and boundary conditions of the transmission device are set up by the software. Secondly, on the basis of finite element software modeling, the influence of magnetic flux permanent magnet eddy current coupler on torque, magnetic induction intensity and eddy current loss under different rotational speed difference and structure parameters is analyzed. From the analysis, it can be concluded that the effect of different rotational speed difference and structure parameters on the torque and magnetic induction intensity is almost the same. When the air gap and structure are the same, the torque has the maximum value when the speed difference is 500-700r/min, and when the structure and speed difference are the same, The smaller the air gap, the greater the torque, and it can be seen that the eddy current loss is mainly related to the speed difference and the transmission torque. Under the same structure and air gap, the larger the speed difference, the greater the eddy current loss, but when the rotational speed difference is constant, the eddy current loss is larger. The greater the torque, the greater the eddy current loss. Thirdly, by analyzing the effect of different structures of magnetic coupler on transmission torque under the same air gap and different rotational speed difference, it is concluded that the optimum magnetic pole number of the magnetic coupler is 10 poles. The thickness of copper disk is 3 mm, the thickness of permanent magnet is 10 mm, and the magnetization angle and air gap of small magnetic angle are as small as possible. The torque value of the optimal structure under different rotational speed difference and air gap is analyzed by finite element method. Finally, the test platform is built and the working principle of the test system is introduced. On the basis of a better understanding of the test platform, the transmission torque of the poly-magnetic permanent magnet eddy current coupler is measured under the optimum structure, and the relationship between its value and the value calculated by finite element analysis is analyzed.
【學(xué)位授予單位】：沈陽工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TH132

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