Cutter wheel, cutter disc as well as cutter assembly suitable for grinder pumps

摘要

The invention relates to a cutter assembly configured for a grinder pump and comprising a cutter wheel (5) and a cutter disc (6) that interacts with each other. The cutter wheel (5) comprises a shaft portion (27) that is configured to interact with a central hole (24) of said cutter disc (6), a hub portion (14) that is connected to the shaft portion (27) and at least two main cutting edges (13) that in the radial direction extend outwards from said hub portion (14) and that are configured to interact with a set of cutting holes (12) of said cutter disc (6), wherein the shaft portion (27) comprises an axially extending cutting recess (28), and wherein the hub portion (14) comprises only one radially extending cutting recess (29). The cutter disc (6) comprises a suction side, a central hole (24) that is configured to interact with the shaft portion (27) of said cutter wheel (5) and a set of cutting holes (12) that open in said suction side radially outside the central hole (24) and that is configured to interact with the main cutting edges (13) of said cutter wheel (5), wherein the central hole (24) comprises two axially extending cutting recess (34) and wherein the suction side comprises a radially extending cutting recess (35) extending from the central hole (24), wherein the two axially extending cutting recesses (34) of the central hole (24) are arranged diametrically opposite each other.