| 摘要 |
According to the present invention, a damper for an aircraft door comprises a cylinder which has a space for accommodating oil inside; a piston which is installed by penetrating one side of the cylinder to reciprocate along an inner space of the cylinder and reciprocates as an aircraft door opens and closes; and a bypass valve which is prepared at one side of the cylinder and includes a fluid passage for flowing the oil in the cylinder, wherein the bypass valve comprises a valve body which has the fluid passage for allowing the oil to flow inside and has oil flow holes at both ends of the inner surface; and an opening and closing unit which is located on a virtual straight line connecting the oil flow holes of the valve body and opens/closes the oil flow holes by moving along the virtual straight line. The oil fluid passage, which is formed between the valve body and the opening and closing unit to provide the same resistance performance regardless of the moving direction of the piston according to the opening and closing of the aircraft door, has a symmetrical shape around the center between the oil flow holes. The door damper of the air craft can prevent an accident caused by the sudden opening and closing of the door and prevent the door from being locked when an accident or an emergency is occurred. |
