PUMP-COMPRESSOR Russian patent published in 2019 - IPC F04B27/04 F04B1/04 

FIELD: pumps building.

SUBSTANCE: invention relates to the field of pump and compressor building and can be used for pumping water, oil and gas, when pumping aggressive liquids containing mechanical impurities. Pump-compressor includes housing with plunger pairs, each of which is isolated from pumped liquid by elastic diaphragm, shaft with cranks made in form of disc. Plunger pairs are combined into two groups shifted relative to each other along the shaft axis. Reciprocating movement of plungers of each group is carried out by separate crank by means of its spring-loaded holder.

EFFECT: lower side loads on plunger pairs, as well as dynamic loads on shaft bearings, higher reliability of plunger pumps.

4 cl, 4 dwg