Fatigue reliability analysis of mechanical components for airflow control in pneumatic solenoid valve

6th Annual International Conference on Material Science and Engineering

Kam, T.Y.^1

Mechanical Engineering Department, National Chiao Tung University, Hsin Chu, Taiwan^1

关键词: Air flow control;    Fatigue reliability;    Highly reliable;    Measurements of;    Mechanical components;    Pneumatic solenoid valves;    Series system;    Static load testing;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/397/1/012063/pdf
DOI  :  10.1088/1757-899X/397/1/012063

来源: IOP

【 摘 要 】

Pneumatic solenoid valves have been broadly used in vehicles to perform automatic control task. For safety reason, they have to be highly reliable and must have long fatigue lives. The failure of the mechanical components including a conical spring and rubber seal can induce airflow disorder, which renders the unreliability of the pneumatic solenoid valve. A method is presented to study the fatigue reliability of the mechanical components used for airflow control in a pneumatic solenoid valve. The statistics of the parameters used to derive the probability distributions of the stresses/strains in the mechanical components are obtained from the measurements of the parameter properties and static load testing of the components. The existing material S-N curves and stress/strain probability distributions are used to determine the reliabilities of the mechanical components. Based on the series system criterion, the fatigue reliability of the pneumatic solenoid valve with the consideration of the airflow disorder failure mode is computed for the life of 1 million cycles.