Self-priming centrifugal pump assembly with multifunctional sealing system
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United States of America Patent
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Issued Date -
Sep 19, 2024
app pub date -
Jun 27, 2022
filing date -
Jul 6, 2021
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Abstract
A self-priming centrifugal pump assembly with a multifunctional sealing system includes a pump having a housing with a downstream wet area and an upstream dry area equipped with bearings for supporting a drive shaft, and a volute pressure chamber in the downstream area to accommodate an impeller keyed to the shaft. The sealing system includes a tubular spacer mounted to the shaft proximate to the impeller, a mechanical seal mounted to the spacer, a first lip seal, and a locking ring for attaching the mechanical seal to the housing. The locking ring is removably fastened to the housing so as to be accessed through a suction port of the pump, so that the impeller, the mechanical seal, and the lip seal can be extracted and replaced or serviced without disassembling the pump and without accessing the bearings of the dry area.
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