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面向动力学分析评价的制冷设备管路载荷辨识及自动布管设计

发布时间:2018-07-29 18:02
【摘要】:动力学分析评价及优化是制冷设备产品研发中的重要工作内容之一,关系到产品的振动、噪声以及可靠性等。其中,管路系统的动力学设计及其优化是一个有挑战性的工作,由于管路设计方案不合理导致的整机异常振动噪声以及断管等可靠性问题较为常见。为此,本文以家用空调器为研究对象,围绕其动力学分析评价中所涉及的管路载荷辨识以及自动布管技术等研究内容开展工作。对空调器管路进行分析的首要条件是准确的识别压缩机时变工况下的激励载荷。针对家用空调器转子压缩机时变工况下激励载荷难以识别的问题,通过对时变工况下制冷设备转子压缩机排回气管进行振动测试,获得排回气管口的加速度时间历程响应并构成加速度期望矩阵;本文利用有限元方法构建家用空调器转子压缩机的虚拟样机模型,并使用该模型分析制冷设备转子压缩机在白噪声载荷作用下排回气管口测点的加速度响应,求出传递函数矩阵。由振动测试结果反算时变工况下家用空调器转子压缩机的载荷激励,并利用迭代方法消除误差,为制冷设备压缩机-管路系统振动分析和管路结构的可靠性设计及评估等提供了依据,为空调管系统的优化提供基础。传统的管路设计方法大都依赖于工程师的经验,具有盲目性,大大增加管路设计的成本和设计周期。本文依托现有的空调管路设计规范,利用Pro/TOOLKIT二次开发工具,采用参数化自动建模的方法,对压缩机—管路系统自动建模的关键技术进行研究。论文介绍自动布管程序的整体架构,并分别对自动布管软件的模块功能、实现原理和关键代码等进行说明。在空调器管路设计中应用该技术后可以大大缩减管路设计周期,降低研发成本,提高管路设计成功率,为进一步实现管路动力学优化设计,提供必要的技术支撑。
[Abstract]:Dynamic analysis, evaluation and optimization is one of the most important work in the research and development of refrigeration equipment, which is related to the vibration, noise and reliability of the product. Among them, the dynamic design and optimization of pipeline system is a challenging work. The reliability problems such as abnormal vibration and noise of the whole machine and broken pipe are common due to the unreasonable pipeline design scheme. Therefore, this paper takes the domestic air conditioner as the research object, and focuses on the identification of pipeline load and the automatic pipe arrangement technology involved in the dynamic analysis and evaluation of the air conditioner. The most important condition for analyzing the pipeline of air conditioner is to accurately identify the excitation load of compressor under time-varying working conditions. In view of the difficulty of identifying the excitation load of the rotor compressor in the time-varying condition of the domestic air conditioner, the vibration test of the exhaust pipe of the rotor compressor of the refrigeration equipment under the time-varying working condition is carried out. The acceleration time history response of the exhaust pipe outlet is obtained and the acceleration expectation matrix is formed. In this paper, a virtual prototype model of the rotor compressor of a household air conditioner is constructed by using the finite element method. The model is used to analyze the acceleration response of the measuring point at the outlet of the exhaust pipe under the white noise load of the rotor compressor of the refrigeration equipment, and the transfer function matrix is obtained. The load excitation of the rotor compressor of a household air conditioner under time-varying working conditions is inversely calculated from the vibration test results, and the error is eliminated by iterative method. It provides the basis for the vibration analysis of compressor-pipeline system of refrigeration equipment and the reliability design and evaluation of pipeline structure, and provides the basis for the optimization of air conditioning pipe system. The traditional pipe design method mostly depends on the engineer's experience and has blindness, which greatly increases the cost and design cycle of pipe design. In this paper, the key technology of automatic modeling of compressor-pipeline system is studied by using the secondary development tool of Pro/TOOLKIT and the method of parameterized automatic modeling. This paper introduces the whole structure of the automatic pipe layout program, and explains the module function, realization principle and key code of the automatic pipe arrangement software. The application of this technology in the pipeline design of air conditioner can greatly reduce the design cycle, reduce the cost of research and development, increase the success rate of pipe design, and provide necessary technical support for the further optimization design of pipeline dynamics.
【学位授予单位】:合肥工业大学
【学位级别】:硕士
【学位授予年份】:2017
【分类号】:TB65

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