| 摘要 |
An apparatus which removes contaminants from the liquid in a centrifugal pump has a housing connected with the pump shaft and having a cleaning chamber connected with a first space containing contaminated liquid and a second chamber connected with a second space for cleaned liquid as well as with the first chamber. The second space communicates with the first space by way of a narrow clearance which further communicates with an outlet of the first chamber. The first chamber can contain a disc separator and its outlet is positioned in such a way that, when the housing rotates, liquid entering the first chamber from the first space is relieved of impurities and flows into the second chamber where it can undergo additional cleaning prior to entering the second space. The contaminants return into the first space via outlet and the clearance, and those contaminants which are contained in the liquid entering the second space are returned into the first space by way of the aforementioned clearance. The liquid is circulated in response to rotation of the housing, either exclusively as a result of establishment of a pressure differential between the two spaces and/or by the provision of one or more conveyors in the form of threads, ribs, discs, scoops or impellers.
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