Patent ID: 11971046
Assignee: SULZER MANAGEMENT AG
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A rotary pump for conveying a fluid, comprising:
a pump housing with an inlet to receive the fluid having a suction pressure and an outlet to discharge the fluid having a discharge pressure;
a pump shaft configured to rotate about an axial direction;
a hydraulic unit to convey and pressurize the fluid, the hydraulic unit comprising an impeller fixedly mounted on the pump shaft, and during operation the hydraulic unit is configured to generate an axial thrust to act on the pump shaft; and
a mechanical seal to seal the pump shaft, the mechanical seal including a rotor connected to the pump shaft in a torque proof manner, and a stator configured to be stationary with respect to the pump housing, and the mechanical seal being arranged between the hydraulic unit and an end of the pump shaft, and the mechanical seal being a balancing device configured to generate an axial force on the pump shaft during operation, with the axial force configured to counteract the axial thrust,
a side of the mechanical seal directed towards the end of the pump shaft being exposed to atmospheric pressure, such that the mechanical seal is configured to seal against the atmosphere.