| 摘要 |
<p>A pump (14) has a shaft (34) and a housing (32) containing pressurized fluid and employs a rubbing-type sealing assembly (40, 42) for sealably and rotatably mounting the shaft (34) within the housing (32). The sealing assembly includes an annular runner (46, 48) mounted around the shaft (34) for rotation therewith and an annular seal ring (52, 54) mounted within the housing (32) in non-rotational relationship thereto. The runner (46, 48) and seal ring (52, 54) have surfaces (58, 60, 64, 66) facing and in rubbing contact with one another. A coating (72) of titanium nitride is incorporated on at least one of the surfaces. The coating (72) of titanium nitride can be deposited as an outer hardface layer on the one surface, or, alternatively, as an inner passivating barrier layer upon the one surface and then a coating (76) of chromium carbide can be deposited as an outer hardface layer on the coating (72) of titanium nitride.</p> |
