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一种新型旋转式液体密封ROTALION已由英国Woking地方James Walker公司的密封专家们研制出来(见图)。 ROTALION是一种自动的非接触式密封,通过保持套环与密封圈之间连续的油膜,完全消除了磨损。在10000小时以上的耐磨试验中,无论轴还是密封圈,都没有磨损的痕迹。密封几乎是无摩擦的,这样除无磨损外,还节省了动力。 ROTALION由一个套装在轴上的聚四氟乙烯塑性套环和一个在外壳上围绕轴提供静止密封的柔性橡胶圈组成。当轴静止时,少量液体通过密封自由地渗透,但当轴旋转时,在密封圈的内缘和外缘之间,建立起一个压降。同时产生的压力打开在橡胶圈侧壁的入口,使液体进入密封圈的径向空腔。这
A new rotary liquid seal, ROTALION, has been developed by sealing experts at James Walker, Woking in the UK (see photo). ROTALION is an automatic, non-contact seal that completely eliminates wear by maintaining a continuous film of oil between the collar and the seal. In more than 10,000 hours of wear test, no matter the shaft or seal, there is no signs of wear. The seal is virtually frictionless, which saves power in addition to no wear. The ROTALION consists of a Teflon-covered plastic collar on the shaft and a flexible rubber ring on the housing that provides a stationary seal around the shaft. When the shaft is at rest, a small amount of liquid freely penetrates through the seal, but when the shaft rotates, a pressure drop is established between the inner and outer edges of the seal. The resulting pressure opens the inlet to the side wall of the rubber ring, allowing the liquid to enter the radial cavity of the seal. This