Research And Analysis The Mechanical Seal Failure And Extend The Life Of Use

In the modern chemical industry, glass-lined reactor as a basic chemical reaction device, generally used in the production of more serious conditions, since most of the chemical reaction requires high temperature and pressure conditions, and more with highly corrosive media, reaction process will produce toxic and harmful gases, so you need to install the sealing means, wherein the mechanical seal is the most common high precision sealing means. However, due to the mechanical seal during use in addition to the contact temperature and pressure, corrosive media and a rotating shaft wobble and other factors, but also bear the heat due to the friction generated during the sealing process, resulting in wear and deformation of the seal, thus affecting the sealing effect and life. The effectiveness of the mechanical seal failure study contributes to better improve the sealing of the structure, improve production efficiency and safety performance, thus prolonging the life of the mechanical seal. In this paper, using FMEA approach to the potential failure of mechanical seals were analyzed by analysis of the raw data collected to verify the results of FMEA, draw the number of seal failure risk order to analyze the impact of a higher risk of failure of the sealing performance, study principles and methods of analysis of faults in prolonging the service life of mechanical seals Objective Analysis Critical Control link improvements. Reads as follows:1. Using FMEA method to analyze the potential failure of mechanical seals, seal failure mode by the severity of the consequences, the frequency and causes of the current control method of seal failure of the seals on the undetectable faults, calculated the potential risk of mechanical seal failure sequence number, the results show abnormal operation temperature of the sealing process, face deformation, temperature anomalies cause increased wear and face value of these items at higher risk of corrosion failure modes.2. Through the acquisition of customer use of mechanical seals the raw data, the results show the order number and FMEA risk analysis of potential failure of the basic agreement, by verifying the data to further clarify the mechanical seal is important to control and improve links.3. Effects of high risk of failure of the sealing performance. Temperature anomalies increased friction between the seal faces hot film, the impact of the seal faces axial and radial temperature gradient. Sealing surface deformation of the membrane pressure to disclose the amount and have a greater impact, while increased wear of the sealing surface, affecting the balance ratio.4. The failure of the mechanical seal failure analysis, the main fault types are:chemical damage, heat damage and mechanical damage from the fault location, friction materials, and other parts of the failure analysis and the responses, depending on the reasons for failure. Develop appropriate improvement measures depending on the cause of failure.5. According to the order of the results of the risk analysis and FMEA temperature and sealing surface deformation measures by analyzing the collected raw data validation Control seal faces, while specification and installation process checks before sealing the use of technical requirements, the ultimate goal is to effectively extend mechanical seal life.