Int J Performability Eng ›› 2022, Vol. 18 ›› Issue (11): 759-769.

Key Factors of Seal Ring Reliability based on QFD

Risu Naa,b, Weiguo Zhanga,*, Kaifa Jiaa,and Quan Zhanga

1. aDepartment of Mechanical Engineering, Inner Mongolia University of Technology, Hohhot, 010051, China;
bMongolia Hydraulic and Control Engineering Technology Research Center, Hohhot, 010051, China
• Contact: *E-mail address: zwg19980201@163.com
• About author:Risu Na is an associate professor and postgraduate supervisor at Inner Mongolia University of Technology. His research interests include mechanical system dynamics and engineering reliability.
Weiguo Zhang is a master's student at Inner Mongolia University of Technology. His main research area is the reliability of sealing structures.
Kaifa Jia is a master's student at Inner Mongolia University of Technology. His research interests include mechanical system dynamics and lifetime reliability.
Quan Zhang is a master's student at Inner Mongolia University of Technology. His research interests include mechanical system dynamics.

Abstract: The manhole sealing performance of a kettle agitator directly affects the production efficiency and safety of the whole pressure vessel. This paper investigated the market demand for the reliability of manhole seal rings. First, the objective weight was determined by the rough set method and the subjective weight was determined by an analytic hierarchy process. The subjective weight and objective weight were integrated organically to obtain a scientific and effective comprehensive evaluation model. Then, the method of Quality Function Deployment is applied to transform the user requirements into the technical characteristics of the seal ring. The technical characteristics of the sealing ring are converted into the influencing factors of the reliability of the sealing ring by the transformation matrix, and the weight of the factors is determined according to the triangular fuzzy number. Finally, the most important factors affecting the reliability of the seal ring were studied by finite element analysis. This paper provides a theoretical basis for studying the reliability design of seal ring.