FIELD: engines and pumps.
SUBSTANCE: proposed unit comprises drive motor, rotary pump and coupling to engage their shafts. Pump housing consists of running and flow sections. Flow section comprises suction pipe, flow chamber to accommodate impeller and involute branch pipe communicated with pressure pipe. Pump shaft incorporates running section supported by the case via bearings and furnished with gland seal. Discs of said closed impeller are equipped with impellers and multistart system of swirled vanes. Said vanes are separated by diffuser intervane channels. Active volume of intervane channel filling allows forcing out in one impeller revolution of (30-600)×10-5 m3/rev of transferred medium. Flow section rear wall is composed of armor disc while its sidewall makes involute branch pipe in the form of monofilar helix diffuser channel. Pressure diffuser branch pipe features outlet cross-section area some 1.2-5.6 times larger that at inlet.
EFFECT: higher efficiency and reliability, longer life.
10 cl, 7 dwg
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Authors
Dates
2014-01-10—Published
2012-09-27—Filed