Gear pump, in particular for feeding fuel from a fuel supply tank to a high-pressure fuel pump

摘要

Gear pump, in particular for feeding fuel from a supply tank to a high-pressure fuel pump, with a housing (10), in which a pump chamber (12) is formed, in which a pair of meshing with one another on their outer circumference of the toothed wheels (14,16) is arranged, which the medium to be conveyed along between their outer circumferences and adjacent to said peripheral walls (20,22) of the pump chamber (12) of the supply channels (28,30) formed from a suction chamber (24) into a pressure chamber (26), the peripheral walls (20,22) of the pump chamber (12) in their to the pressure space (26) extending towards the peripheral regions in each case a with the pressure chamber (26), which is connected to the groove (32,34) by means of which the radial distance between the outer circumference of the gear wheels (14,16) and the peripheral walls (20,22) is enlarged, characterized in that the grooves (32,34) starting from the pressure chamber (26) via different angular ranges (α, β) in relation to the axis of rotation (15,17) of the respective gear (14,16), wherein the angular range (β) is greater than the angular range (α), and in that the angular ranges (α, β), by way of which the grooves (32,34), are determined in such a way that at least approximately at the same time in the case of two gear wheels (14,16) in each case a tooth gap in the surface or a tooth is aligned with the respective groove (32,34) passes.