Abstract
Although the rotary sealing mechanism of a lip seal with hydrodynamic aids had already been intuitively described, there are two factors to be taken into account. One of which is the existence of many different types, a consequence of experimental development, and the other, the need to standardize design for questions of reliability. Therefore, systematic development of standardized hydrodynamic seals is required. So, a rotary hydrodynamic seal with sine-shaped pumping elements has been designed using the knowledge available on this matter. For theoretical analysis of its reverse pumping capacity, a mathematical model based on the hydrodynamic flow principle was developed.
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