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气动装置的使用性能在很大程度上取决于活动连接密封部件的结构。这里所介绍的密封圈新结构如图1所示,它具有T形截面,工作可靠,使用寿命长,因为它们在工作时产生的摩擦力很小。装配时(图2a),密封圈3沿气缸2的工作直径D具有过盈,而在活塞槽内则具有间隙k=0.2mm和α=0.1mm.与气缸接触的环形表面的圆弦半径r等于环截面高度h的一半。密封圈的工作情况如下:在供给压缩空气时(图2σ),密封圈在变形的同时沿气缸表面滚到用凸缘(圆周半径r_1)与活塞槽壁接触。在空气压力增加时,密封圈沿气缸表面滑动,压向槽壁,然后与活塞一起运动。
The serviceability of the pneumatic device depends to a large extent on the structure of the movable connection seal. The new ring seal structure presented here, shown in Figure 1, has a T-shaped cross-section, reliable operation and long service life because of its low friction during operation. 2a), the seal ring 3 has an interference along the working diameter D of the cylinder 2 and a clearance k = 0.2 mm and α = 0.1 mm in the piston groove The radius of the circular string r of the annular surface in contact with the cylinder r Equal to half the ring height h. The working condition of the sealing ring is as follows: When the compressed air is supplied (Fig. 2σ), the sealing ring rolls along the surface of the cylinder while being deformed and contacts the piston groove wall with a flange (circumferential radius r_1). As the air pressure increases, the seal slides along the cylinder surface, against the wall, and moves with the piston.