GEARING HYDRAULIC MACHINE Russian patent published in 2006 - IPC F04C2/08 

FIELD: hydraulics.

SUBSTANCE: gearing hydraulic machine comprises driving and driven externally engaged gears whose pins are radial and axially arranged with respect to the movable casings of the bearings. All together they are mounted in the internal in the internal chamber of the machine housing defined by two intersecting cylindrical bores. At least from one side of the gears, the back surfaces of the bearing casings is provided with the seal. The outer periphery of the grooves in the vicinity and parallel to the sides of the gears receive eight-shaped seals to define ring passages between the inner surface of two circular members of the seal and bottom of the groove. The passages are defined by the grooves at the sites where their sides go into the bottom. The internal diameter of two circular members of the eight-shaped seal, when they are free, is greater than the diameter of the grooves at the site where their sides go into the bottom.

EFFECT: enhanced stability of operation and simplified assembling.

3 cl, 8 dwg