文献[1]表明,由于采用松软(散的)填料、塑性填料或者特殊成型圈并改变填料箱的形状(与普通填料箱相比),不使结构复杂化,就可以大大改善暗杆阀门填料部位的工作状况(图1a)。在这种填料箱中,填料对填料箱侧壁和阀杆实际上不存在静摩擦力,因此,压紧力实际上完全用于填料在阀杆长度方向产生均匀作用力。在这种情况下,填料的压紧力可以按最简 The literature [1] shows that due to the use of loose (loose), plastic or special forming rings and changing the shape of the stuffing box (compared to normal stuffing boxes), the dark rod valve stuffing can be greatly improved without complicating the structure Part of the working conditions (Figure 1a). In this stuffing box, there is virtually no static friction between the stuffing box side wall and the stem, so the pressing force is practically completely used to create a uniform force on the length of the stem. In this case, the pressing force of the packing can be minimized