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以往的检测轴密封支点结构通常是象图1所示那样的。即检测轴2由压力密封膜片5支持着,该膜片安装在(变送器)检测部本体1的压力室3中的开口端4处,以该膜片5的位置为中心运动。为使该密封支点动作灵敏,减小薄膜片厚度和加大直径是有效的,但这样做就会降低膜片承压性能,因在外缘周边产生过大应力而破损。
Conventional inspection shaft seal fulcrum structure is usually as shown in Figure 1. That is, the detection shaft 2 is supported by a pressure seal diaphragm 5 which is mounted on the open end 4 of the pressure chamber 3 of the (transmitter) detector body 1 and moves around the position of the diaphragm 5. In order to make the sealing fulcrum action sensitive, reducing the film thickness and increase the diameter of the film is effective, but this will reduce the diaphragm pressure performance, due to the outer edge of the resulting excessive stress and damage.