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公开(公告)号：WO2019202499A1
公开(公告)日：2019-10-24
申请号：PCT/IB2019/053127
申请日：2019-04-16
Applicant: FLSMIDTH A/S
Inventor： ECHEVERRI, Luis Fernando , FRATER, John Semple
Abstract: A centrifugal seal system for a slurry pump (1) is provided with an adjustable wear ring (2) having an outer diameter (18) that is 1.3 to 2.1, and more preferably between 1.5 and 1.9 times the inlet diameter (17) of a suction orifice (33). The adjustable wear ring (2) acts in combination with a centrifugal expeller (5) that generates a differential backpressure to seal the slurry pump (1) and prevent leakage of the fluid pumped to the surroundings. The centrifugal expeller (5) has a diameter (12) which is 75 to 95%, and more preferably, between 82% and 90% of the diameter (19) of the impeller (7). The slurry pump (1) may comprise a seal clamp (44), one or more compression packing rings (47), and an axially-floating cartridge (48) comprising one or more lip seals (46) to prevent leakage when the slurry pump (1) is stopped.
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公开(公告)号：WO2018109722A1
公开(公告)日：2018-06-21
申请号：PCT/IB2017/057963
申请日：2017-12-14
Applicant: FLSMIDTH A/S
Inventor： DON, Kenneth Lloyd , ECHEVERRI, Luis , FRATER, John Semple
Abstract: A suction pipe inlet device for a centrifugal pump, the device having a hollow tubular axisymmetric body along a longitudinal axis having an open first end adapted for fitting into or against a retention tank; an open second end adapted for fitting into or against an inflow end of a suction pipe having an outer pipe diameter and an inner pipe diameter; a converging section located closer to the retention tank; a diverging section located closer to the suction pipe; a throat located at the intersection point between the converging and diverging sections, the converging and diverging sections defining an interior converging-diverging geometry within the tubular axisymmetric body and the throat defining a minimum inner cross sectional area of the tubular axisymmetric body.
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