过去的传统卷帘门存在以下不足，门体一般由若干的门片呈波浪型折叠而成，由于门体启闭过程中，相邻的门片会相对折叠或伸展，从而使得门体的宽度发生变化，但是这过程中，门洞上的滑槽的宽度是不变的，从而使得卷帘门在卷起或放下的过程中，由于门片晃动会产生较大的噪音;我们不妨试试电动卷帘门，电动卷帘门就没有噪音了?是因为什么?

The traditional rolling shutter door in the past has the following shortcomings: the door body is generally folded by several door pieces in a wave shape. During the opening and closing process of the door body, the adjacent door pieces will be folded or extended relatively, which will change the width of the door body. However, during this process, the width of the chute on the door opening is unchanged, so that the rolling shutter door will produce greater noise due to the shaking of the door pieces during the rolling up or down process; We might as well try the electric roller shutter door. Will the electric roller shutter door make no noise? Because of what?

那是因为，能降噪的电动卷帘门在墙体上设置有门洞，门洞的两侧设置有供门体上下升降的凹槽，凹槽内两侧壁设置有气囊，气囊的外侧设置有防护板，两个防护板之间形成用于夹持门体且供门体上下滑移的滑槽。

That is because the electric rolling shutter door that can reduce noise is provided with a door opening on the wall, both sides of the door opening are provided with grooves for the up and down lifting of the door body, both sides of the groove are provided with air bags, and the outside of the air bags is provided with protective plates. A chute is formed between the two protective plates to clamp the door body and allow the door body to slide up and down.

门体向上运动时，相邻两个门片由于挤压折叠使得门体的宽度增加，门片向外挤压防护板，防护板相外挤压气囊，使得防护板与门片始终保持紧贴状态，使得门片和防护板之间因存在间隙很小不会碰撞产生噪音或者噪音很小，门体向下运动时，相邻两个门片伸展使得门体的宽度减小，气囊在弹性作用下推动防护板，使得防护板紧贴门片，同样起到减少噪音的效果。

When the door body moves upward, the width of the door body is increased due to the squeezing and folding of the two adjacent door sheets. The door sheets squeeze the protective plate outward, and the protective plate squeezes the air bag outward, so that the protective plate and the door sheet are always kept close to each other, so that there is a small gap between the door sheet and the protective plate, so that there will be no collision or very little noise. When the door body moves downward, the width of the door body is reduced due to the extension of the two adjacent door sheets, The airbag pushes the protective plate under the elastic action to make the protective plate close to the door, which also has the effect of reducing noise.

济南卷帘门厂家提醒您，气囊上设置有气嘴，气嘴穿出墙体外。通过采用上述技术方案，便于对气囊进行充气或放气。防护板呈L型，一侧贴合于气囊与门体之间，另一侧伸出凹槽外位于门洞的两侧。

Jinan roller shutter door manufacturer reminds you that there is an air nozzle on the air bag, and the air nozzle goes out of the wall. By adopting the above technical scheme, it is convenient to inflate or deflate the airbag. The protective plate is L-shaped, one side is fitted between the airbag and the door body, and the other side extends out of the groove and is located on both sides of the door opening.

一方面能够对气囊起到保护作用，另一方面，能够对气囊的形变起到导向辅助作用。凹槽的内侧壁设置有限位槽，气囊的一侧粘接于限位槽内。使得气囊在凹槽内更加稳定。门体沿其长度方向均布有若干橡胶制成的隔片。在门体收卷的过程中，避免金属的门片之间摩擦产生噪音。

On the one hand, it can protect the airbag, on the other hand, it can guide and assist the deformation of the airbag. The inner wall of the groove is provided with a limit groove, and one side of the airbag is bonded in the limit groove. This makes the airbag more stable in the groove. The door body is uniformly distributed with a plurality of rubber spacers along its length direction. During the winding process of the door body, the friction between metal door plates shall be avoided to produce noise.

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