FIELD: machine building.
SUBSTANCE: gear pump comprises a casing 1 with removable end caps 2, an axis 3 with an axial opening, a driving shaft 4, at least one contacting pair of gear wheels. An inner gear wheel 5 is installed on the axis 3 and is fitted with radial openings 6 made between the teeth. An outer gear wheel 7 is made as an annular one and embraces the inner gear wheel 5 contacting with it by the inner end face surface. Joints for connection with the medium supply and withdrawal main lines are made on the cap 2 on the side opposite to the driving shaft 4 and provide for connection of the inner casing 1 space to the supply main line and of the axial opening to the withdrawal main line for the pumped medium. A transit hole 19 in the axis 3 wall is made at an angle to the radius providing for an axoid surface in the contact point of the gear wheels 5 and 7.
EFFECT: decrease of the pump dimensions and weight, reduction of the gear wheel wear, reduction of vibration, improved reliability of axial fixation and smoothness of the pump operation.
4 dwg
