公开(公告)号：US4626003A

公开(公告)日：1986-12-02

申请号：US740710

申请日：1985-06-03

申请人： Michael R. Williams ,  Neil G. Weber

发明人： Michael R. Williams ,  Neil G. Weber

IPC分类号： F16L17/073 ,  F16L27/08 ,  F16L17/06

CPC分类号： F16L17/073 ,  F16L27/0828

摘要： A constant motion swivel seal assembly having greatly improved useful life without leakage of fluid from a swivel joint. The seal assembly includes one or more annular sealing rings rotatably positioned between an outer joint member and an inner joint member. A wedge-shaped anti-extrusion ring mounted between the annular sealing ring and a gap between the inner and outer joint members prevents the sealing ring from extrusion into the gap. The anti-extrusion ring has a relatively large surface area in contact with the inner joint member and a relatively small surface area in contact with the outer joint member so the anti-extrusion ring remains in substantially the same position relative to the inner joint member. The relatively small area of contact between the outer joint member and the anti-extrusion ring allows the anti-extrusion ring to slide over the surface of the outer joint member as the outer joint member rotates relative to the inner joint member. Hoop stress also prevents fluid pressure from forcing the anti-extrusion ring radially outward against the outer joint member while fluid pressure axially presses the anti-extrusion ring tightly against an end portion of the inner joint member. A relatively small area of contact between the sealing ring and the inner member and a larger area of contact between the sealing ring and the outer member allows the sealing ring to slide over the inner member and rotate with the outer member.

摘要翻译： 恒定运动的旋转密封组件具有大大改善的使用寿命而不会从旋转接头泄漏流体。 密封组件包括可旋转地定位在外接头构件和内接头构件之间的一个或多个环形密封环。 安装在环形密封环与内外接头构件之间的间隙处的楔形防挤压环防止密封环挤出到间隙中。 抗挤压环具有与内接头构件接触的相对大的表面积和与外接头构件接触的相对小的表面积，因此抗挤压环相对于内接头构件保持在基本相同的位置。 当外接头构件相对于内接头构件旋转时，外接头构件和抗挤压环之间相对较小的接触面允许抗挤压环在外接头构件的表面上滑动。 环向应力还​​防止流体压力将抗挤压环径向向外压靠在外接头构件上，同时流体压力将抗挤压环轴向地压靠在内接头构件的端部上。 密封环和内部构件之间相对较小的接触面积以及密封环与外部构件之间较大的接触面积允许密封环在内部构件上滑动并与外部构件一起旋转。