| 摘要 |
A sealing system for a shutoff unit comprising two substantially ring-shaped sealing elements, one of which is tightly connected with the housing or with the blocking element of the shutoff unit and the other is either tightly connected with the blocking element or the housing or is formed thereat. The sealing elements are pressed against one another due to a closing movement of the blocking element for carrying out a shutoff action. The one sealing element is constructed as a thin-wall body of undulated or wave-shaped cross-section and elastically deformable under the action of the closing force, said elastically deformable thin-wall body extending over the ring width of the corresponding sealing element and in the closed position, with deformation of its wall, bearing by means of wave peaks protruding from one side of the thin-wall body against the other sealing element at least at two ring regions with line contact. The blocking element or housing which is connected with the thin-wall body possesses beneath these ring regions free deformation spaces for its wall and adjacent such spaces a respective support extending parallel to the ring region for each wave peak protruding from the other side of the thin-wall body. The marginal regions of the ring-shaped thin-wall body of undulated cross-section are prevented from moving in a manner which would increase the ring width. |
