Zusammenfassung
The investigation methods discussed here make it possible to establish the relevant sealing characteristics of shaft surfaces. The pumping rates determined for the shaft surfaces permit a rapid pre-evaluation of the suitability of a shaft surface as a counter face for lip seals. The observation of the system pumping rate during operation without interference to the tribological system - for example, by disassembly and renewed installation of the seal - provide further evaluation possibilities. The influence of the different shaft surfaces on sealing security and reliability of the sealing system can be determined. The selection of suitable manufacturing processes and parameters is made easier. Several manufacturing methods were checked for their suitability for the counter face in shaft seals. It is shown that the machining feed spiral that is created on the shaft surface is not the reason for the pumping ability of the shaft surface. With appropriate manufacturing, both hardened and non-hardened traverse turned steel shaft surfaces can be sealed by means of suitable lip seals. The direction of rotation is not crucial. This is proved by the sealing tests that were successfully completed. The turning methods without axial feed, such as tangential turning and plunge turning, also produce suitable counter faces for radial lip seals
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