Modular System of an Axially Integrated Pump Structure

Abstract

A modular system for a pump structure for the axial integration of a selection of electric drive assemblies (1) at a selection of pump assemblies (2) and a shaft bearing assembly (3) which includes a pump shaft (31) and a shaft bearing (32) with at least two rolling bearing sets, the shaft bearing (32) supporting the pump shaft (31) between a motor rotor (1) of the electric drive assembly (1) and a pump rotor (21) of the pump assembly (2) at a pump housing (20) of the pump assembly (2); wherein the selection of pump assemblies (2) jointly comprises a collar portion (23) at the pump housing (20) which accommodates the shaft bearing (32) in a through-hole of the pump housing (20) and protrudes to an accommodation side for an electric drive unit (1); and the selection of pump assemblies (2) differs with respect to the pump rotor (21) and/or a pump chamber (22); the selection of drive assemblies (1) jointly comprises a motor rotor (11) which is formed at a radially external section in the shape of a rotor cup (13), the rotor cup (13) radially encircling and axially intersecting the collar portion (23) that each pump housing (20) of the selection of drive assemblies (1) jointly comprises; and the selection of drive assemblies (1) differs with respect to a stator (12); and wherein for each combination of the selection of electric drive assemblies (1) and the selection of pump assemblies (2), at least one radial dimension of the pump shaft, the shaft bearing, the collar portion (23) and/or the rotor cup (13) are the same.

1 . A modular system for a pump structure for the axial integration of an electric drive assembly at a pump assembly including:
 a selection of electric drive assemblies with different drive capacities;   a selection of pump assemblies with different volumetric capacities and/or different configurations; and   a shaft-bearing-assembly including a pump shaft and a shaft bearing with at least two rolling bearing sets, the shaft bearing supporting the pump shaft between a motor rotor of the electric drive assembly and a pump rotor of the pump assembly at a pump housing of the pump assembly; wherein   the selection of pump assemblies jointly comprises a collar portion at the pump housing which accommodates the shaft bearing in a through-hole of the pump housing and protrudes to an accommodation side for an electric drive unit; and   the selection of pump assemblies differs with respect to the pump rotor and/or a pump chamber;   the selection of drive assemblies jointly comprises a motor rotor which is formed at a radially external section in the shape of a rotor cup, the rotor cup radially encircling and axially intersecting the collar portion that each pump housing of the selection of drive assemblies jointly comprises; and   the selection of drive assemblies differs with respect to a stator; and wherein   for each combination of the selection of electric drive assemblies and the selection of pump assemblies, at least one radial dimension of the pump shaft, the shaft bearing, the collar portion and/or the rotor cup are the same.   
     
     
         2 . The modular system according to  claim 1 , wherein for each combination out of the selection of electric drive assemblies and the selection of the pump assemblies, a collar portion with the same outer diameter is provided on the side of the pump housing and a rotor cup with the same inner diameter is provided on the side of the motor rotor. 
     
     
         3 . The modular system according to  claim 1 , wherein for each combination out of the selection of electric drive assemblies and the selection of the pump assemblies, on the side of the pump housing, a collar portion with the same inner diameter, the same shaft bearing and a pump shaft with the same outer diameter are provided. 
     
     
         4 . The modular system according to  claim 1 , wherein for each combination out of the selection of electric drive assemblies and the selection of the pump assemblies, a motor chamber with the same inner circumference is formed in the pump housing. 
     
     
         5 . The modular system according to  claim 4 , wherein the motor chamber is closed to one axial side of the pump housing by a motor cover with an integral pin-fin heat sink in which control electronics may be accommodated for an electric drive assembly. 
     
     
         6 . The modular system according to  claim 4 , wherein at least one part of the pump housing that includes the through-hole and the collar portion, and/or the motor cover is made of a material suitable for impact extrusion, preferably cold impact extrusion.