Rotor assembly and electrodynamic machine with axial vents for heat transfer

An electrodynamic machine comprising:

• a rotor assembly comprising a lamination section with rotor laminations formed to define annular arrays of axial vents and rotor slots, with rotor conductor bars being disposed in the rotor slots;
• a stator assembly defining an annular core receiving the rotor assembly, the rotor assembly rotating within the stator assembly based on electromagnetic fields generated by the stator assembly and the rotor assembly;
• a first end connector supported by the rotor conductor bars, wherein a first axial space is formed between the end connector and the lamination section;
• and
• a first annular guiding element arranged at least in the first axial space between the end connector and the lamination section for guiding a cooling fluid flow in an axial direction of the rotor assembly,
• wherein the first annular guiding element consists of a shape of a hollow cylinder with a cylindrical section, two parallel annular bases perpendicular to a cylinder axis and an annular mounting section which is coupled to one of the two parallel annular bases and extends in a radial direction to form a monolithic component that is configured to be directly bolted on to an outer annular surface of the end connector via the annular mounting section,
• wherein the cylinder axis is parallel to the axial direction of the cooling fluid flow, and
• wherein the cylindrical section of the first annular guiding element is configured such that the axial space between an end lamination section of the lamination section and a short circuit ring of the end connector is bridged to avoid a cooling fluid flow in the radial direction by eliminating a parasitic air flow path.