The results showed that the fracture was of typical fatigue fracture, and surface defects were the main factor resulting in the failure of the airvalvespring.
结果表明，断裂呈现典型的疲劳断裂特征，材料表面缺陷是引起该弹簧疲劳断裂的主要原因。
2
Airvalve size and airflow resistance losses of valves always speed and the size of the spring-loaded edge.
气阀阻力损失大小与气流的阀隙速度及弹簧力大小有关。
3
Based on solenoid valve design theory, by estimating the maximum air pressure and spring force, a direct operated solenoid valve is designed to control the open and close of the air chamber.