Patent ID: 9683575
Date: 2017-06-20
CPC Classifications: F04D

Claim:
1. A pump for conveying a pump fluid in the form of a multiphase mixture, wherein the pump fluid provided at an input pressure at a low-pressure side of the pump can be conveyed to a high-pressure side of the pump by means of a pump rotor rotatably supported about an axis of rotation in a pump stator in the operating state and a rotor shaft is arranged in a shaft leadthrough such that a lubricating film of a lubricating fluid formed from the pump fluid can be formed in a ring gap between the rotor shaft and the shaft leadthrough; and wherein a separation device is provided at the rotor shaft by which a predefinable quantity of an ingredient can be separated from the pump fluid by means of a centrifugal force for providing the lubricating fluid at the ring gap in the operating state, wherein a recirculation device is provided which separates a gas from the pump fluid in the separation device and recirculates the separated gas to the high-pressure side of the pump with the aid of the separation device.