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This chapter deals with the sealing of fluids on rotating shafts, a delicate problem that now finds its almost universal solution in the application of a product known as a “rotary shaft seal”. The entire discussion is destined for designers and users, as a valid support and guidance for selecting the most appropriate type for their specific uses. The shape of the “rotary shaft seal” is shown in the figure belowe, which also supplies the recurrent nomenclature for the component parts of the ring.custom molded designs oil seals.
The typical fundamental components of a shaft seal are:
The sealing lip, consisting of a flexible membrane ending in an edge, made of elastomeric material, designed to wrap around the shaft and thus exert a sealing action (Par. 2.1)
The metal case, designed to provide the shaft seal with the necessary rigidity for a stable coupling with the relative housing bore (Par. 2.2)
The Garter spring, acting as a complement to the fundamental action of the sealing lip .custom molded designs oil seals
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