DEVICE FOR A NON-HERMETIC SEAL

摘要

The invention relates to a device for a non-hermetic seal between a stator a nd a rotor of a turbomachine in the foot area of guide vanes associated with th e stator, comprising a brush sealing ring mounted on said guide vanes by means of spoke-type centering, whereby the bristles thereof form a fluid barrier, which is permeable in a defined manner, with a rotating seal surface. A supporting ring is arranged on the side of the seal with a lower operating pressure at a small distance from the rotating seal surface. Said supporting ring is integrally connected to the feet of the guide vanes and can be segmented by means of separating joints. The spoke-type centering is embodie d in such a way that it is permeable to pressure. The brush sealing ring is axially relieved from pressure, with the exception of the bristle surface between the seal surface and the support ring.