Pump group comprising two command modules

A pump group of a cooling system of a vehicle, the pump group extending along a main axis and comprising:

• an axial flow stator that produces an electromagnetic action in a direction parallel to the main axis;
• a first command module and a second command module, positioned at two opposite axial ends of the axial flow stator, each command module defining a respective impeller chamber in which cooling liquid flows, wherein each command module comprises:
• i) an impeller;
• ii) an impeller shaft that extends along the main axis and comprises an impeller end, the impeller being integrally connected to said impeller end, and a control portion configured to receive a rotational control action;
• and
• iii) a rotor integrally connected to said control portion controllable in rotation by action of the axial flow stator;
• and
• a pump body comprising a specially shaped stator chamber, in which the axial flow stator is housed, wherein the first and second command modules are mounted to the pump body on two opposite axial sides,
• wherein each command module further comprises a module casing, the impeller chamber being defined in said module casing, a flat shell and a volute shell mutually engaged with each other, and wherein the impeller shaft is supported aligned with the main axis by the flat shell through a support opening and the control portion protrudes from the flat shell.

A cooling system of a vehicle, the cooling system comprising a pump group extending along a main axis and comprising:

• an axial flow stator that produces an electromagnetic action in a direction parallel to the main axis;
• a first command module and a second command module, positioned at two opposite axial ends of the axial flow stator, each command module defining a respective impeller chamber in which cooling liquid flows, wherein each command module comprises:
• i) an impeller;
• ii) an impeller shaft that extends along the main axis and comprises an impeller end, the impeller being integrally connected to said impeller end, and a control portion configured to receive a rotational control action;
• and
• iii) a rotor integrally connected to said control portion controllable in rotation by action of the axial flow stator;
• and
• a pump body comprising a specially shaped stator chamber, in which the axial flow stator is housed, wherein the first and second command modules are mounted to the pump body on two opposite axial sides,
• wherein each command module further comprises a module casing, the impeller chamber being defined in said module casing, a flat shell and a volute shell mutually engaged with each other, and wherein the impeller shaft is supported aligned with the main axis by the flat shell through a support opening and the control portion protrudes from the flat shell,
• wherein the first and second command modules operate in series, so that a predefined quantity of cooling liquid flows first in the first command module and then in the second command module.