FIELD: engines and pumps.
SUBSTANCE: borehole pump unit filter modular section consists of a head, base, perforated case, filtration element, shaft with bearings, each including moving and fixed bushes that make a pair of friction. Said case is arranged between said head and said base and composed of thin-wall tube. Bushes of every bearing of the shaft are made of hard-alloy and/or ceramic material. Forced cooling device is fitted on said shaft nearby the bush of at least one bearing to cool down said pair of friction and consists of at least one bucket wheel.
EFFECT: higher efficiency and reliability owing to lower hydraulic resistance.
6 cl, 5 dwg
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