GEAR WHEEL PUMP Russian patent published in 2015 - IPC F04C2/10 F04C11/00 F04C15/00 

FIELD: engines and pumps.

SUBSTANCE: invention relates to gear wheel pump. The gear wheel pump (1) for liquid supply has a gear wheel (3) with external geared rim installed with a capability of rotation, and geared ring (2) with an internal geared rim and closed uniform cylindrical surface. A gear wheel (3) and geared ring (2) for creation of injection action engage to each other and located in common housing together with electrically switched stator (7). The stator (7) concentrically encloses a geared ring (2) and interacts with it to create an electromotive force. A plain bearing (13) is provisioned which is implemented on the stator (7) as a layer coated on the surface (12) of the stator (7) facing towards the geared ring (2). The layer is made with a protuberance, which ensures adjoining of the stator (7) to the internal wall of the housing with pre-load.

EFFECT: invention is aimed at creation of simple and cost-efficient solution for fixing of the gear wheel in the gear wheel pump with internal gearing.

8 cl, 3 dwg