FIELD: machine building.
SUBSTANCE: machine is presented as a casing 1 with two cylindrical grooves 5 and 6 in which engaged gear wheels 7 and 8 are installed. The wheels are fitted with spiral teeth. The teeth profile at one of the wheels in face section is formed by circular arcs 14 shifted in respect to the wheel rotation axis, and the teeth profile of the second wheel in the same section is formed by the sections of fronts of cycloidal curves 15 forming an eccentric-cycloidal engagement of wheels. Under certain parameters such engagement can have a contact spot located near the pitch point.
EFFECT: machines of increased efficiency with reduced pulsations, minimal sliding friction allowing for pumping of medium with high gas fraction content in a pump mode.
4 cl, 5 dwg
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