Shaft Device for an Electric Machine, Electric Machine, and Motor Vehicle

A shaft device for an electric machine, comprising:

• a slip ring element configured to transmit an excitation current for rotor windings of a rotor of the electric machine;
• a rotor shaft, configured to be coupled to the rotor and support the slip ring element, the rotor shaft having at least one fluid channel arrangement via which fluid is configured to be conducted in a direction of a supporting body to exchange heat with the supporting body, the supporting body having a receiving opening into which the rotor shaft and the slip ring element are rotatably mounted;
• and
• a seal carrier of the shaft device introduced, at least in some regions, into the receiving opening between the rotor shaft and a supporting body wall, the seal carrier holding at least one sealing body between the rotor shaft and the supporting body, the sealing body having a through-opening arrangement configured to conduct the fluid from the fluid channel arrangement toward the supporting body wall.

An electric machine comprising a shaft device comprising:

• a slip ring element configured to transmit an excitation current for rotor windings of a rotor of the electric machine;
• a rotor shaft, configured to be coupled to the rotor and support the slip ring element, the rotor shaft having at least one fluid channel arrangement via which fluid is configured to be conducted in a direction of a supporting body to exchange heat with the supporting body, the supporting body having a receiving opening into which the rotor shaft and the slip ring element are rotatably mounted;
• and
• a seal carrier of the shaft device introduced, at least in some regions, into the receiving opening between the rotor shaft and a supporting body wall, the seal carrier holding at least one sealing body between the rotor shaft and the supporting body, the sealing body having a through-opening arrangement configured to conduct the fluid from the fluid channel arrangement toward the supporting body wall.

A motor vehicle comprising at least one electric machine comprising a shaft device comprising:

• a slip ring element configured to transmit an excitation current for rotor windings of a rotor of the electric machine;
• a rotor shaft, configured to be coupled to the rotor and support the slip ring element, the rotor shaft having at least one fluid channel arrangement via which fluid is configured to be conducted in a direction of a supporting body to exchange heat with the supporting body, the supporting body having a receiving opening into which the rotor shaft and the slip ring element are rotatably mounted;
• and
• a seal carrier of the shaft device introduced, at least in some regions, into the receiving opening between the rotor shaft and a supporting body wall, the seal carrier holding at least one sealing body between the rotor shaft and the supporting body, the sealing body having a through-opening arrangement configured to conduct the fluid from the fluid channel arrangement toward the supporting body wall.