光伏产业用真空泵屏蔽式电动机设计研究

发布时间：2018-12-26 18:36

【摘要】：真空泵用屏蔽电动机具有完全密封、高可靠、低噪音等特点，，是营造光伏太阳能产业生产线环境的关键设备。由于定转子间金属屏蔽筒受到旋转磁场的作用产生电磁感应损耗，进而产生发热引起屏蔽筒温升、热变形和热应力，直接导致屏蔽筒膨胀、起鼓、破裂和泄漏，影响太阳能光伏元器件的品质和成品率；有时候会造成整条生产线成批部件报废，经济损失很大。探索真空泵屏蔽电动机泄漏的根源和探寻改进方法和措施是亟待解决的实际工程难题，本文采用有限元分析方法，对真空泵屏蔽电动机损耗、温升、热变形和热应力进行分析。首先，回顾了屏蔽电动机的发展历史，总结了屏蔽电动机的结构、原理和特点，分析屏蔽筒电磁感应损耗的计算方法和存在问题。使用商业有限元分析软件对屏蔽电动机屏蔽筒涡流分布仿真计算，得到屏蔽电动机屏蔽筒电磁感应损耗、定转子铁耗和定子铜耗，分析对比电阻率不同材料制成屏蔽筒时屏蔽电动机各项损耗的变化。其次，建立真空泵屏蔽电动机温度场分析模型，结合ANSOFT仿真得到各部分损耗数值，利用ANSYS软件计算，分析不同屏蔽筒材料屏蔽电动机温度分布特点。提取屏蔽电动机温度分布曲线，揭示了屏蔽电动机在稳定运行时主要部件之间温度的关系。再次，将真空泵屏蔽电动机温度场计算结果导入ANSYS应力场计算中，得到了屏蔽电动机稳定运行时定子屏蔽筒的热变形和热应力，通过对不同材料定子屏蔽筒热变形、热应力和端部应力的对比分析，得出屏蔽筒材料选材合理化结论。最后，在温度场分析的基础上，对改进的“礼帽”形屏蔽筒应力场进行了分析，并与传统屏蔽筒应力场对比，验证该新型屏蔽筒的可行性与有效性。
[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.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB752;TM302

【参考文献】