BUSSOLA ANTICORROSIVA PER ACCOPPIAMENTI CON ANELLI DI TENUTA DI QUALSIASI TIPO, ANCHE METALLICA, E PER ACCOPPIAMENTI, COME PARTE DURA, CON CUSCINETTI A STRISCIAMENTO

Current construction techniques have solved the problems of sealing against oil leakages onto drive shafts by using retaining rings that interact directly with the shaft, or alternatively, stainless steel rings (Figs. 1 and 2).It is clear that the part of the shaft in sliding contact with the retaining ring must be subjected to hardening heat treatment and precision grinding in order to reach a hardness of 60 HRC and an acceptable surface finish.The above processes confer a sufficiently long life to the retaining ring and limit wear that occurs in the shaft seat in the area involved in the sliding contact.Alternatively, the shaft itself can be worked on in the area of the sliding contact, by removing material and the chrome layer (Fig.3).In any case, all are cost-intensive procedures. Even when a stainless steel (Fig.2) ring is used, costs are high and the problem of wear caused by the abrasive action of the retaining ring on the metal during operation remains, leaving a groove in the metal which in a very short time wears out the gasket and shaft seat.The problem of corrosion facilitated by any possible chemical agents also remains, the latter jeopardizing the ring seal and its working life.To date there seem to have been no solutions studied, tried and tested to overcome the aforementioned problems.