机械密封相变半径和温度的研究
发布时间：2018-11-24 14:28
【摘要】：机械密封作为旋转设备中重要的密封装置,广泛应用在石油化工、造纸、食品、航空等行业中。国内外的学者对于机械密封进行了大量的研究,但是对于机械密封密封端面间被密封介质相变的研究大多基于实验观察研究,少量的理论计算不仅应用范围较窄,且都基于大量的假设条件。文本提出热结构耦合的分析方法可计算机械密封稳定运转时的相变半径,可以广泛适用于多种类型的机械密封。 本文在机械密封密封端面为微凸体接触的条件下,建立机械密封有限元模型,结合理论计算结果和结构分析结果编写APDL语言对模型进行热分析,得到机械密封的相变半径。研究了被密封介质的压力、温度、使用puv值、机械密封载荷系数和端面宽度对密封环温度场的影响,得到对密封端面间被密封介质相变半径的影响。建立双端面机械密封实验台,测量静密封环不同位置处的温度,经过对比,理论计算结果与实验测试结果有很好的一致性。 本文结合《AP1682-2004离心泵和转子泵用轴封系统》标准中冷却辅助装置方案,分析各种方案的适用条件,利用FLUENT软件分析不同冷却方案对机械密封温升的影响,并将其结果与不使用冷却辅助装置的机械密封进行对比,在一定程度上给机械密封选择冷却辅助装置给出参照。 本文通过测量密封环端面的微凸体分布特性,得到密封环真实接触面积,将使用真实接触面积计算得到的相变半径和温度结果和使用名义接触面积计算得到的结果与实验结果进行对比,发现密封温度与接触面积相关。 以上这些结果对机械密封的几何结构设计、使用、优化提供依据,为以后的研究提供理论基础。
[Abstract]:As an important sealing device in rotating equipment, mechanical seal is widely used in petrochemical, papermaking, food, aviation and other industries. Scholars at home and abroad have done a lot of research on mechanical seal, but most of the research on phase change of sealing medium between the end surfaces of mechanical seal is based on experimental observation, a small amount of theoretical calculation not only has a narrow scope of application. And based on a large number of assumptions. In this paper, the thermal structural coupling analysis method can be used to calculate the phase change radius of mechanical seals in stable operation, which can be widely used in various types of mechanical seals. In this paper, the finite element model of mechanical seal is established under the condition that the end face of mechanical seal is microconvex. The thermal analysis of the model is compiled by APDL language combined with the theoretical calculation results and structural analysis results, and the phase change radius of mechanical seal is obtained. The effects of pressure, temperature, puv value, mechanical seal load coefficient and end face width on the temperature field of the seal ring are studied. The effect on the phase change radius of the sealed medium between the seal faces is obtained. A double end mechanical seal test bench was set up to measure the temperature of the static seal ring at different locations. By comparison, the theoretical calculation results are in good agreement with the experimental results. Combined with the cooling auxiliary device scheme of AP1682-2004 centrifugal pump and rotor pump standard, this paper analyzes the applicable conditions of various schemes, and analyzes the effect of different cooling schemes on the temperature rise of mechanical seal by using FLUENT software. The result is compared with the mechanical seal without cooling auxiliary device, and the reference is given to the selection of cooling auxiliary device for mechanical seal to a certain extent. In this paper, the true contact area of the seal ring is obtained by measuring the distribution characteristics of the micro-convex body on the end face of the seal ring. The results of phase transition radius and temperature calculated by real contact area and those calculated by nominal contact area are compared with the experimental results. It is found that the sealing temperature is related to the contact area. These results provide a basis for the geometric structure design, application and optimization of mechanical seals, and provide a theoretical basis for future research.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH136
本文编号：2354073
[Abstract]:As an important sealing device in rotating equipment, mechanical seal is widely used in petrochemical, papermaking, food, aviation and other industries. Scholars at home and abroad have done a lot of research on mechanical seal, but most of the research on phase change of sealing medium between the end surfaces of mechanical seal is based on experimental observation, a small amount of theoretical calculation not only has a narrow scope of application. And based on a large number of assumptions. In this paper, the thermal structural coupling analysis method can be used to calculate the phase change radius of mechanical seals in stable operation, which can be widely used in various types of mechanical seals. In this paper, the finite element model of mechanical seal is established under the condition that the end face of mechanical seal is microconvex. The thermal analysis of the model is compiled by APDL language combined with the theoretical calculation results and structural analysis results, and the phase change radius of mechanical seal is obtained. The effects of pressure, temperature, puv value, mechanical seal load coefficient and end face width on the temperature field of the seal ring are studied. The effect on the phase change radius of the sealed medium between the seal faces is obtained. A double end mechanical seal test bench was set up to measure the temperature of the static seal ring at different locations. By comparison, the theoretical calculation results are in good agreement with the experimental results. Combined with the cooling auxiliary device scheme of AP1682-2004 centrifugal pump and rotor pump standard, this paper analyzes the applicable conditions of various schemes, and analyzes the effect of different cooling schemes on the temperature rise of mechanical seal by using FLUENT software. The result is compared with the mechanical seal without cooling auxiliary device, and the reference is given to the selection of cooling auxiliary device for mechanical seal to a certain extent. In this paper, the true contact area of the seal ring is obtained by measuring the distribution characteristics of the micro-convex body on the end face of the seal ring. The results of phase transition radius and temperature calculated by real contact area and those calculated by nominal contact area are compared with the experimental results. It is found that the sealing temperature is related to the contact area. These results provide a basis for the geometric structure design, application and optimization of mechanical seals, and provide a theoretical basis for future research.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH136
【参考文献】
相关期刊论文 前10条
1 沈锡华;;机械密封摩擦副端面的热应力计算[J];北京化工学院学报;1980年03期
2 王胜军,郝木明,张书贵;机械密封温度场计算[J];化工机械;2004年04期
3 陈震;机械密封技术研究进展——摩擦学[J];流体工程;1989年05期
4 陈文毅;李学虎;管洪;;机械密封温度场的有限元计算法[J];流体工程;1991年10期
5 郝木明;李香;李鲲;吴兆山;;端面弧形浅槽机械密封温度场及变形研究[J];流体机械;2010年04期
6 耿鹏照;;化工机械密封的泄漏问题与对策[J];黑龙江科技信息;2011年03期
7 王淮维;郝木明;;串联式机械密封温度场研究[J];流体机械;2012年11期
8 曹良知;;中压和高压阀门密封面的堆焊[J];焊接;1957年10期
9 孙见君,魏龙,顾伯勤;机械密封的发展历程与研究动向[J];润滑与密封;2004年04期
10 单晓亮;胡欲立;;基于Ansys的机械密封环温度场分析[J];润滑与密封;2006年09期
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