Device for sealing an annular gap

摘要

The invention relates to a device for sealing an annular gap. The aim of the invention is to provide a device for sealing an annular gap by means of a magnetic liquid. The inventive device can seal two contactless, axially adjacent pipe ends in such a way that no exchange takes place between the fluid medium in the pipes and the proximity and that the magnetic liquid does not mix with the fluid medium and that the pipes can be moved and rotated against each other involving little friction. To this end, the pipe ends forming an annular gap are connected to the poles of a magnetic arrangement in a magnetically conducting manner. Said magnetic arrangement is fixed around the annular gap area. A magnetic liquid is arranged in the annular gap.