自动门
旋转门企应该重视五金件对气密性影响
发布时间:2012/3/28
 
  成都旋转门讯:对门窗密封性能产生影响的门窗五金件种类很多;按照对门窗密封性能来分类,大体可分为两类:多锁点五金件和单锁点五金件。门窗五金件对门窗气密性产生的作用应该引起门窗企业足够的重视。
 
  多锁点五金件的锁点和锁座分布在整个门窗的四周;当门窗锁闭后,锁点、锁座牢牢地扣在一起,与铰链(合叶)或滑撑配合,共同产生强大的密封压紧力,使密封条弹性变形,从而提供给门窗足够的密封性能,使扇、框形成一体;因此,多锁点五金件对门窗的密封有很多好处,可以大大提高门窗的密封性能。而单锁点五金件所产生的密封性能相对来说就要差很多,由于单锁点只能在门窗开启侧提供单点锁闭,与铰链(合叶)或滑撑配合只能产生3、4处锁闭点,致使门窗有4个角处于无约束状态,因此,从两个无约束角到锁点之间的缝隙,严重降低了门窗的密封性能。
 
  以执手侧锁点布置为例:设窗宽为B,窗高为H,窗扇抗弯刚度E×I,分为单锁点、两锁点、三锁点三种情况(锁点距扇边不小于0.1mm),按力学公式分别给出窗扇执手侧在密封方向的最大变形值。
 
  由此可见:采用三锁点后已可大大减少门窗扇的变形,提高密封性能。
 
  当然在满足强度和密封要求的条件下,不宜采用过多的锁点;否则会造成浪费。
 
  成都旋转门提醒:同样,在门窗中使用的合页,大部分在使用过程中都需要把合页位置的密封胶条割去,才能使用;而这部分由于自动感应门安装合页造成的对气密性的影响大家有没有考虑?事实上由于割去密封胶条而产生的缝隙渗透对节能产生的负面效果基本上大家都视而不见。
 
 
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