FIELD: electromechanical engineering. SUBSTANCE: waterproofing device used for motors driving submersible pumps for lifting liquids from boreholes has additional butt-end gland disposed in bottom part of protector in vicinity of flange to form enclosed chamber together with above-mounted butt-end gland. Chamber may accommodate flexible expansion device or sediment bowl. In addition flange mounts pipe one of whose ends is disposed within thrust bearing and other one, not lower than at upper level of additional butt-end seal space. EFFECT: enhanced reliability and service life of device. 1 cl, 1 dwg
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|---|---|---|---|
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