Arrangement for delivering fluids

An arrangement for delivering fluids comprising:

• a fluid pump (91), implemented as a centrifugal pump, which includes a pump wheel (90) that is connected to a first permanent magnet (92);
• an electronically commutated internal-rotor motor (70) having a stator (68), inside which is rotatably arranged a rotor (60) having a second permanent magnet (64) that interacts with the first permanent magnet (92) as a magnetic coupling (93);
• a partitioning can (52) that separates the first permanent magnet (92) of the magnetic coupling (93), said first permanent magnet being arranged inside said partitioning can (52), in fluid-tight fashion from the second permanent magnet (64) of the internal-rotor motor (70), said second permanent magnet being arranged outside the partitioning can (52),
• the stator (68) of the internal-rotor motor (70) being arranged at least predominantly radially outside the magnetic coupling (93);
• a bearing arrangement (55, 56;
• 155, 156),
• a first stationary shaft (54) mounted on an outer side of the partitioning can (52) and surrounded, on a side facing away from the fluid pump (91), by a layer (49) made of plastic material, said first stationary shaft (54), together with the bearing arrangement (55, 56;
• 155, 156), serving for rotatable journaling of the rotor (60) of the internal-rotor motor (70), and
• a second stationary shaft (50) provided, on an inner side of said partitioning can (52), for journaling the pump wheel (90),
• the second stationary shaft (50) being made of a dimensionally stable material and extending into the first stationary shaft (54) in order, together with the layer (49) made of plastic material, to form and stiffen the first stationary shaft (54) there,
• the bearing arrangement (55, 56;
• 155, 156) being arranged at the circumference of the first stationary shaft (54) and the second stationary shaft (50).