EXTERNAL GEAR PUMP FOR A WASTE HEAT RECOVERY SYSTEM

• Main Authors: Riedle, Matthias, Laetzel, Marc, Branczeisz, Jakob, Bredenfeld, Guido
• Format: Patent
• Language: English
• Published: 11.07.2019
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS; WEAPONS

The invention relates to an external gear pump (1) having a pump housing (2). An inlet (2a), an outlet (2b), and a working chamber (6) are formed in the pump housing (2). A first gear (11), which is arranged on a first shaft (21), and a second gear (12), which is arranged on a second shaft (22), are arranged in the working chamber (6) in such a way that said first and second gears mesh with each other. Both gears (11, 12) have teeth having a tooth width (b). The first shaft (21) is radially supported in at least one plain bearing (61), and the second shaft (22) is radially supported in at least one further plain bearing (63). The plain bearing (61) has a bearing diameter (D63), and the further plain bearing (63) has a further bearing diameter (D63). During operation of the external gear pump (1), a delivery volume (V) of a working medium can be conveyed from the inlet (2a) to the outlet (2b). The two bearing diameters (D61, D63) are selected in such a way that the ratio V/(D612*b) is less than 1.1 and the ratio V/(D632*b) is less than 1.1.