PUMP UNIT Russian patent published in 1995 - IPC

FIELD: pump engineering. SUBSTANCE: rocking unit is housed in the pressure-tight casing. The rotor is mounted inside the housing to define working chambers. The electric motor is coupled with the rotor by way of driving shaft which is set in bearing supports inside the casing. The inlet and outlet branch pipes are arranged inside the casing from the side of the rocking unit and the electric motor respectively. The casing has a pan defining the closed space. The through opening is made in the casing bottom from the side of the unit. The opening connects the pan space with the casing space and passages for supplying a lubricant. The passages are arranged in the face covers. The bearing bushings are made up as sliding bushings. The through openings made in the casing from the side of the electric motor. The opening is arranged in the zone of the outlet branch pipe and connected hydraulically with respective support of the driving shaft. EFFECT: enhanced efficiency. 2 cl, 3 dwg