变工况机械密封闪蒸实验方案设计及实验分析.pdfVIP

变工况机械密封闪蒸实验方案设计及实验分析 摘 要 机械密封又称端面密封，是旋转轴用动密封，机械密封性能可靠，泄漏量小， 且能适应生产过程的自动化和高温，低温，高压，真空，高速以及各种强度腐蚀 的介质，含固体颗粒介质等苛刻条件工作的密封要求。 实际应用中的机械密封经常在变工况的条件下工作，由于工作工况的变化从 而导致了机械密封经常性的破坏和失效，于是就需要研究可以在变工况下能稳定 工作的抗变机械密封，为了检验抗变机械密封的工作性能和为进一步的研究提供 参考和材料，模拟机械密封在变工况条件下工作的实验装置的研究设计就十分重 要。 本文对端面开启后的闪蒸开启机理进行实验方案设计和对实验结果进行理 论分析。根据实验需要，将密封腔体的材料改为有机玻璃，实现了机械密封实验 装置的可视化功能。通过学习、研究，运用泵吸入口的低压来模拟机械密封的负 压抽空工作环境。最后通过温度、压力、位移等传感器的设计选择，为变工况机 械密封台的实验提供了准确的试验信息，完成了变工况机械密封闪蒸实验方案的 设计。 关键词：机械密封，变工况，闪蒸，实验装置，改造 III 变工况机械密封闪蒸实验方案设计及实验分析 Abstract Mechanical seal is also called face seal, which is used in rotating axis seal conditions. Mechanical seal is credible, and leak little and provincial. Mechanical seal is used in high temperature, low temperature, and high pressure, vacuum, high speed and all intensive corrosive auto manufacture process conditions. Mechanical seal were often used in changing working conditions in fact. The frequent failure and destroy of mechanical were caused because of the changing operating conditions. So it’s very important and necessary to find experimental equipment to simulate the conditions with the mechanical seal to study the factors of the changing working conditions with the mechanical seal. In this paper, the experimental equipments of simulating the changing working conditions with mechanical seal are rebuilt and the theoretical analysis of experimental results are showed.Firstly,according to the requirement of experiment,we change the material of mechanical seal cavity into Polymethylmethacrylate,in order to realize visualization fun