This first application of the Fey rings was successful for many years, however, it could not secure the economic future of Fey.

 

A significant condition for the further development of the Fey laminar ring sealings was the development of a cost effective manufacturing process, so that the rings could be manufactured individually in an oval format through thermal treatment, becoming round when installed in their working conditions as out-springing rings into bores or as in-springing rings on shafts by providing the highest possible gap sealing.

 

Using these arguments and the positive sealing effects of gap and labyrinth sealings, Fey was in a position to address the sealing problems of the industry and this resulted in increasing inquiries and requirements that led to a sealing program with a diameter range from 15 mm to 1,300 mm. In the meantime, Fey's manufacturing program consists of app. 16,800  ring types with different ring diameters, ring cross sections and different ring materials.

 

Successful users of Fey laminar rings include manufacturers of roller and plain bearings, exhaust pipes of internal combustion engines, axle bearings of rolling stock, continuous casting plants, transmission systems, power units and many more.

 

Fey laminar rings are offered as single wound laminar rings (AS and IS) with joint gap and as double wound laminar rings (ASD and ISD) without joint gap. The use of the different laminar ring geometries and the design of the installation technology depend on the operating conditions, the motion sequence of the components to be sealed and on the leakage requirements of the customer. In addition to single outspringing or single inspringing ring sets, Fey laminar rings can also be combined as a ring set within a groove: outspringing rings with inspringing rings and vice versa. The additional coverage of the groove base plays within the bore of the housing or at the groove base of the shaft optimize the labyrinth effect and therefore the sealing effect. However, we must point out that these combinations cannot be recommended for all sealing tasks.

 

One thing which must be avoided at all costs is that the laminar ring seal sets are moved axially by the movement of the groove, which may result from the axial play in the bearings. Depending on the frequency involved, friction would be generated between the ring and the groove flanks which may lead to premature wear of the rings and adjacent components.

 

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