FIELD: pumps.
SUBSTANCE: invention relates to pumps for transferring process fluid. The pump (1) comprises a body (3), a stator part (11) fixed in the body (3), and at least one impeller (9) placed rotatably in the body (3). The process fluid channel (15) passes through the stator part (11) and the impeller (9). The bearing (31) rotatably supports the impeller (9) in the body (3); a bearing lubrication channel (33) is also provided for the circulation of the fluid flow through the bearing (31). The rotating screw (43A; 43B; 43C) made integrally with the impeller (9) and rotating therewith when the pump is in operation, acts on the process fluid so that the rotation of the impeller (9) contributes to the circulation of the process fluid by means of said rotating screw in the bearing lubrication channel (33).
EFFECT: more efficient pumping of the process fluid in the bearing lubrication channel, effective lubrication and cooling of the bearings without the need for using special equipment.
7 cl, 3 dwg
