Mechanical seal arrangement having sliding surfaces of differing hardness

摘要

The invention relates to a mechanical seal arrangement comprising: a rotating slide ring (2) with a first sliding surface, and a stationary slide ring (3) with a second sliding surface, which delimit a sealing gap (4) between one another, the first and second sealing surfaces having differing hardness. The harder sealing surface (20) has a diamond coating and the softer sealing surface consists of carbon composite material and a mean initial roughness R