Lubrication and cooling system for rotatable components

A fluid flow system for a rotatable shaft assembly, the fluid flow system comprising:

• a first fluid flow device configured to be coupled in a first portion of a rotatable shaft, wherein an output shaft extends inside the rotatable shaft, the first fluid flow device including at least one physical feature configured to retain fluid in the rotatable shaft and guide a flow of the fluid in an axial direction in the rotatable shaft;
• a second fluid flow device configured to be coupled in a second portion of the rotatable shaft, spaced axially apart from the first fluid flow device, the second fluid flow device including at least one physical feature configured to guide the flow of the fluid axially through the rotatable shaft, from the first fluid flow device toward the second fluid flow device, wherein the fluid is discharged along at least one discharge path from the rotatable shaft;
• wherein the first fluid flow device includes:
• a wall portion with an opening formed in a central portion thereof, the wall portion defining a first physical feature of the first fluid flow device;
• a rim portion extending from a circumferential portion of the wall portion, the rim portion defining a mating surface configured to be coupled to a mating surface of the rotatable shaft such that the first fluid flow device rotates together with the rotatable shaft;
• and
• a plurality of baffles arranged circumferentially along the rim portion and corresponding portions of the wall portion, the plurality of baffles defining a second physical feature of the first fluid flow device;
• and
• wherein the second fluid flow device includes:
• a wall portion with an opening formed in a central portion thereof;
• a rim portion extending from a circumferential portion of the wall portion, defining a mating surface configured to be coupled to a mating surface of the rotatable shaft such that the second fluid flow device rotates together with the rotatable shaft;
• a plurality of baffles arranged circumferentially along the rim portion and corresponding portions of the wall portion, the plurality of baffles defining a first physical feature of the second fluid flow device;
• and
• a plurality of channels formed in the wall portion, in fluid communication with the opening, the plurality of channels defining a second physical feature of the second fluid flow device.