内置冷干机的设计与研究

发布时间：2018-01-02 04:12

本文关键词：内置冷干机的设计与研究　出处：《上海交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：从上个世纪的八九十年代开始,冷冻式干燥机(简称“冷干机”)在国内逐渐有了较大的发展。随着国内外空压机技术的快速提高、全球经济一体化的持续发展及生产力的逐步增强,市场上使用者对冷干机的气源干燥度、干燥方法、气体后处理内外置方法等各方面的要求也越来越高。本次论文的课题围绕已知空气压缩机(以下简称为“空压机”)配套对应的冷干机展开,通过优化结构的设计方法和理念将冷干机和空压机集成在一起,也称为内置,从而可以实现对空压机和冷干机这个集成体的启停、报警的目的。为实现冷干机内置于空压机这一技术优化目标,论文主要对冷干机在空压机中的布局优化设计、冷干机的逻辑控制以及测试方法、出现故障后的应对方法作详细说明。在内置布局的设计中,在三维模型中确定冷干机的内置位置,对空压机整体以及冷干机的支撑做FEA的应力分析,从理论上验证冷干机内置于空压机后空压机整体结构的强度和刚度满足要求。在匹配选型的过程中,首先从已知空压机的参数入手确定所需冷干机的制冷量、露点要求、制冷压缩机的功率等数值,利用露点计算法计算各个实验制冷压缩机的相关参数,选出冷干机的核心部件制冷压缩机。接着通过制冷量的换热计算,得到所需冷却器的换热面积数值,这样就对热交换器选型。再根据计算出的空气流量,对风扇厂家提供的样本进行选型。最后所有选型完成后,根据样本上提供的尺寸,对制冷压缩机、热交换器和风扇逐一建模。在逻辑控制的过程中,主要根据温度和压力的关系图确定高压保护开关、高温保护开关和低温保护开关的类型和性能范围。在测试检验的过程中,主要测试以下三个工况下的性能参数是否合格:(1)在空载工况下检验制冷剂是否充注过量或者不足,控制调节旁通阀开度大小;(2)在标准工况下检验设计露点是否达到设计目标值;(3)在高温工况下检验冷干机在极限工作环境下是否仍可以保持持续运转不会停机。
[Abstract]:Since the eighties and nineties in 0th century, the refrigerated dryer ("cold dryer") has gradually developed in China, with the rapid improvement of air compressor technology at home and abroad. With the continuous development of global economic integration and the gradual enhancement of productivity, the drying degree and drying method of the air source of the cold drying machine by the users on the market. The requirements of the internal and external methods of gas aftertreatment are becoming more and more high. The subject of this paper revolves around the known air compressors (hereinafter referred to as "air compressors") corresponding to the cooling and drying machine. Through the design method and idea of optimized structure, the cold dryer and air compressor are integrated together, also called built-in, so that the start and stop of the integrated body of air compressor and air dryer can be realized. The purpose of alarm. In order to realize the technical optimization goal of the cold dryer built into the air compressor, this paper mainly focuses on the layout optimization design of the cold drying machine in the air compressor, the logic control of the cold dryer and the test method. In the design of the built-in layout, the position of the cold dryer is determined in the three-dimensional model, and the stress analysis of the whole air compressor and the support of the cold dryer is done by FEA. It is theoretically verified that the strength and stiffness of the whole structure of the air compressor built into the air compressor can meet the requirements. In the process of matching the type selection, the refrigerating capacity of the required air dryer is determined from the known parameters of the air compressor. Dew point requirements, refrigeration compressor power and other values, using the Dew Point calculation method to calculate the relevant parameters of each experimental refrigeration compressor, select the core parts of the refrigerator refrigeration compressor, and then through the cooling capacity of the heat transfer calculation. Get the heat transfer area value of the required cooler, so that the heat exchanger type selection. Then according to the calculated air flow rate, the fan manufacturer to provide the sample selection. Finally, all the selection completed. According to the size provided on the sample, the refrigeration compressor, heat exchanger and fan are modeled one by one. In the process of logical control, the high pressure protective switch is mainly determined according to the relationship diagram of temperature and pressure. Types and performance ranges of high temperature and low temperature protective switches. During testing and testing. This paper mainly tests whether the performance parameters of the following three working conditions are up to standard: 1) check whether the refrigerant is overfilled or insufficient under the no-load condition, and control the opening of the regulating bypass valve; (2) checking whether the design dew point has reached the design target value under the standard working condition; At high temperature condition, check whether the machine can keep running continuously and not shut down under the limit working condition.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH45;TB4

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