BOREHOLE ELECTRICALLY DRIVEN PUMP Russian patent published in 2014 - IPC F04C2/10 F04C11/00 F04C15/00 H02K7/14 

FIELD: engines and pumps.

SUBSTANCE: invention relates to borehole pumps. Borehole pump 200 comprises first and second case elements, gear pump, motor stator 222 and multiple permanent magnets. First case element comprises first recess with first flat surface 246 surrounded by first wall 248. Second case element is secured to first case element and comprises second recess with second flat surface 256 surrounded by second wall 258 shifted from surface 246 parallel therewith. Gear pump comprises inner rotor 266 and outer rotor 242. Stator 222 is arranged in the seat made in second case element. Magnets are fitted to revolve along with rotor 242 nearby stator 222. Every rotor 242 and 266 has opposite side arranged nearby surfaces 246 and 256. Rotor 242 is located nearby surfaces 246 and 256. Rotor 242 is located between first and second recesses and levelled at rotational axle by means of walls 248 and 258. Shaft 268 engages with every firs and second case elements confining the rotational axle of rotor 266 shifted from that of rotor 242.

EFFECT: perfected design.

12 cl, 12 dwg