【摘要】：真空泵用屏蔽電動(dòng)機(jī)具有完全密封、高可靠、低噪音等特點(diǎn)，，是營(yíng)造光伏太陽(yáng)能產(chǎn)業(yè)生產(chǎn)線環(huán)境的關(guān)鍵設(shè)備。由于定轉(zhuǎn)子間金屬屏蔽筒受到旋轉(zhuǎn)磁場(chǎng)的作用產(chǎn)生電磁感應(yīng)損耗，進(jìn)而產(chǎn)生發(fā)熱引起屏蔽筒溫升、熱變形和熱應(yīng)力，直接導(dǎo)致屏蔽筒膨脹、起鼓、破裂和泄漏，影響太陽(yáng)能光伏元器件的品質(zhì)和成品率；有時(shí)候會(huì)造成整條生產(chǎn)線成批部件報(bào)廢，經(jīng)濟(jì)損失很大。探索真空泵屏蔽電動(dòng)機(jī)泄漏的根源和探尋改進(jìn)方法和措施是亟待解決的實(shí)際工程難題，本文采用有限元分析方法，對(duì)真空泵屏蔽電動(dòng)機(jī)損耗、溫升、熱變形和熱應(yīng)力進(jìn)行分析。 首先，回顧了屏蔽電動(dòng)機(jī)的發(fā)展歷史，總結(jié)了屏蔽電動(dòng)機(jī)的結(jié)構(gòu)、原理和特點(diǎn)，分析屏蔽筒電磁感應(yīng)損耗的計(jì)算方法和存在問(wèn)題。使用商業(yè)有限元分析軟件對(duì)屏蔽電動(dòng)機(jī)屏蔽筒渦流分布仿真計(jì)算，得到屏蔽電動(dòng)機(jī)屏蔽筒電磁感應(yīng)損耗、定轉(zhuǎn)子鐵耗和定子銅耗，分析對(duì)比電阻率不同材料制成屏蔽筒時(shí)屏蔽電動(dòng)機(jī)各項(xiàng)損耗的變化。 其次，建立真空泵屏蔽電動(dòng)機(jī)溫度場(chǎng)分析模型，結(jié)合ANSOFT仿真得到各部分損耗數(shù)值，利用ANSYS軟件計(jì)算，分析不同屏蔽筒材料屏蔽電動(dòng)機(jī)溫度分布特點(diǎn)。提取屏蔽電動(dòng)機(jī)溫度分布曲線，揭示了屏蔽電動(dòng)機(jī)在穩(wěn)定運(yùn)行時(shí)主要部件之間溫度的關(guān)系。 再次，將真空泵屏蔽電動(dòng)機(jī)溫度場(chǎng)計(jì)算結(jié)果導(dǎo)入ANSYS應(yīng)力場(chǎng)計(jì)算中，得到了屏蔽電動(dòng)機(jī)穩(wěn)定運(yùn)行時(shí)定子屏蔽筒的熱變形和熱應(yīng)力，通過(guò)對(duì)不同材料定子屏蔽筒熱變形、熱應(yīng)力和端部應(yīng)力的對(duì)比分析，得出屏蔽筒材料選材合理化結(jié)論。 最后，在溫度場(chǎng)分析的基礎(chǔ)上，對(duì)改進(jìn)的“禮帽”形屏蔽筒應(yīng)力場(chǎng)進(jìn)行了分析，并與傳統(tǒng)屏蔽筒應(yīng)力場(chǎng)對(duì)比，驗(yàn)證該新型屏蔽筒的可行性與有效性。
[Abstract]:The shielded motor for vacuum pump has the characteristics of complete sealing, high reliability and low noise. It is the key equipment to create the environment of photovoltaic solar energy industry production line. Because the metal shield cylinder between stator and rotor is affected by the rotating magnetic field, it causes electromagnetic induction loss, and then produces heat, which causes the temperature rise, thermal deformation and thermal stress of the shield tube, which directly leads to the expansion, drum, rupture and leakage of the shield tube. Affecting the quality and yield of solar photovoltaic components; Sometimes, the whole production line parts will be scrapped in batches, and the economic loss will be great. It is an urgent practical engineering problem to explore the source of leakage of vacuum pump shielded motor and the improvement methods and measures. In this paper, the loss, temperature rise, thermal deformation and thermal stress of vacuum pump shielded motor are analyzed by using finite element analysis method. Firstly, the development history of shielded motor is reviewed, the structure, principle and characteristics of shield motor are summarized, and the calculation method and existing problems of electromagnetic induction loss of shield cylinder are analyzed. Using the commercial finite element analysis software to simulate the eddy current distribution of shield cylinder of shield motor, the electromagnetic induction loss, iron loss of stator and rotor and copper loss of stator and stator of shield motor are obtained. The variation of the loss of the shielded motor made of different materials is analyzed and compared. Secondly, the temperature field analysis model of vacuum pump shielded motor is established. Combined with ANSOFT simulation, the loss value of each part is obtained, and the temperature distribution characteristics of shielding motor with different shielding tube materials are analyzed by using ANSYS software. The temperature distribution curve of shield motor is extracted and the relationship between the main components of shield motor in stable operation is revealed. Thirdly, the temperature field of vacuum pump shielded motor is introduced into the ANSYS stress field calculation, and the thermal deformation and thermal stress of the stator shield cylinder are obtained when the shield motor is running stably. By comparing the thermal stress and the end stress, the reasonable material selection conclusion is obtained. Finally, based on the analysis of temperature field, the stress field of the improved "hat" shield tube is analyzed, and compared with the traditional shield tube, the feasibility and effectiveness of the new type shield tube are verified.
【學(xué)位授予單位】：沈陽(yáng)工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TB752;TM302

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