Patent ID: 6761546
Filing Date: 2004-07-13
Classification: F01C,F04C,F16C

Abstract:
A gear pump comprisinga casing (1), which has a suction side (24) and a delivery side (25); two intermeshing gear rotors (2, 3) which are disposed in the casing (1), and which convey a high viscous pumping medium from the suction side (24) to the delivery side (25), and which have bearing sections (15 to 18) at their ends; plain bearings (11 to 14), each of which, by formation of a clearance, lodges a bearing section (15 to 18), which are lubricated by the pumping medium, and which include at least a cooling duct (39); pumping medium branch conduits (34) which discharge from the delivery side (25) and lead to the clearances (35) of each plain bearing (11 to 14): pumping medium return conduits (36), which lead from the clearances (35) to the suction side (24); a coolant supply conduit (38) which is connected to the at least one cooling duct (39) to provide the cooling duct (39) with a coolant; and a coolant discharge duct (41) for discharging said coolant from the at least one cooling duct (39); wherein the at least one cooling duct (39) is embodied such that cooling varies along the circumference and/or in the longitudinal direction and/or in the radial direction of the plain bearing (11 to 14) so that the most intense cooling takes place in an area of smallest width of the clearance.