Mechanical seal arrangement of a hydrodynamic retarder and hydrodynamic retarder

摘要

Mechanical seal arrangement, in particular retarder mechanical seal arrangement, comprising - a first mechanical seal (2) with a first rotating seal ring (3) and a first stationary seal ring (4), which define a first sealing gap (5) between them, - an additional seal (6), - A cooling medium space (7) which is filled with a cooling medium and which extends to the sealing gap of the first mechanical seal (2), - the first mechanical seal (2) sealing the cooling medium space from an environment, - A cooling medium access (8) into the cooling medium space (7) for supplying cooling media, and - a cooling medium outlet (9) from the cooling medium space (7) for removing cooling medium, - the additional seal (6) being arranged in the cooling medium access (8), - characterized in that - the additional seal ( 6) is set to open when the pressure in the cooling medium access (8) rises above a first pressure (P1) in the cooling medium space (7) and at the second pressure (P0) in the cooling medium inlet (8), which is smaller than the first pressure (P1) in the cooling medium chamber, - in the cooling medium outlet (9) a closing element (10) for releasing and closing the cooling medium outlet (9) is arranged, and - the closing element (10) is a check valve.