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某冷水机组立式气液分离器的设计与优化

发布时间:2018-08-01 10:13
【摘要】:气液分离器作为保障制冷系统安全运行的重要部件,广泛应用于制冷系统中。由于运行工况的不同,气液分离器尺寸结构的差异,其对制冷系统的整体运行将产生不同的影响。因此,对气液分离器进行优化设计有着重要的实际应用价值。本文以某型号的冷水机组的气液分离器为研究对象,对其结构、流动和噪声等展开了相应的分析和研究。(1)通过相关文献和额定工况运行参数以及制冷剂充注量,确定了气液分离器的容积、直径及高度等参数数值。(2)在额定运行工况下,分别采用数值法和解析法,对气液分离器进行了结构应力分析,得到封头受力情况,结果显示数值法更适合于额定工况下气液分离器的受力计算。(3)对气液分离器内制冷剂的流动进行数值模拟,得到气液分离器内部压力分布、速度分布及频率声压关系曲线。结果显示回油孔设置具有一定的合理性;气动噪声产生的位置主要位于气液分离器的底部。(4)应用有限元方法对气液分离器的壳体进行了模态分析,得到了分离器的固有频率。对气液分离器在压缩机工作情况下进行了动态响应模拟,得到了动态响应曲线。(5)采用正交试验设计方法,对气液分离器内腔外套管长度、套管管径比及回油孔孔径对压降的影响进行了研究。结果显示,外套管高度为450mm,管径比2.73时,对压降的影响最大。
[Abstract]:As an important component to ensure the safe operation of refrigeration system, gas-liquid separator is widely used in refrigeration system. Because of the different operating conditions and the difference of the size and structure of the gas-liquid separator, it will have different influence on the whole operation of the refrigeration system. Therefore, the optimization design of gas-liquid separator has important practical application value. In this paper, the structure, flow and noise of the gas-liquid separator of a certain type of chillers are analyzed and studied. (1) through the relevant literature, operating parameters under rated operating conditions and refrigerant charge, The volume, diameter and height of the gas-liquid separator are determined. (2) under rated operating conditions, the structural stress of the gas-liquid separator is analyzed by numerical method and analytical method, and the stress of the head is obtained. The results show that the numerical method is more suitable for the force calculation of the gas-liquid separator under rated working conditions. (3) numerical simulation of the refrigerant flow in the gas-liquid separator is carried out, and the pressure distribution, velocity distribution and the relationship between frequency and sound pressure in the gas-liquid separator are obtained. The results show that the setting of the return hole is reasonable and the position of the pneumatic noise is mainly at the bottom of the gas-liquid separator. (4) the modal analysis of the shell of the gas-liquid separator is carried out by using the finite element method, and the natural frequency of the separator is obtained. The dynamic response of the gas-liquid separator is simulated under the condition of compressor operation, and the dynamic response curve is obtained. (5) the length of the casing tube in the inner cavity of the gas-liquid separator is calculated by the orthogonal design method. The influence of casing diameter ratio and oil return hole diameter on pressure drop is studied. The results show that the pressure drop is most affected when the tube height is 450 mm and the diameter ratio is 2.73.
【学位授予单位】:安徽工业大学
【学位级别】:硕士
【学位授予年份】:2017
【分类号】:TB657

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6 黄f逃,

本文编号:2157244


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