Fluid pump for an aircraft turbomachine, lubrication circuit and aircraft turbomachine

A lubrication circuit for lubricating an aircraft turbomachine, comprising at least one pump, the pump comprising:

• a ring through which a duct passes along a central axis, the ring being immobile and comprising a wall,
• a rotor driven in rotation relative to the ring along a main axis offset from the central axis,
• cavities between the ring and the rotor, a volume of the cavities varying according to an angular position of the rotor relative to the ring,
• an inlet space configured to admit a fluid into the cavities and a discharge space configured to discharge the fluid from the cavities, a pressure in the discharge space being higher than a pressure in the inlet space, the discharge and inlet spaces being radial and passing through the wall. and
• a groove exposing the cavities to the pressure of the discharge space as the rotor rotates and to a pressure of the circuit downstream of the pump, the groove passing radially through the wall and opening into the discharge space.

An aircraft turbomachine, comprising a lubrication circuit having at least one pump, the pump comprising:

• a ring through which a duct passes along a central axis, the ring being immobile and comprising a wall,
• a rotor driven in rotation relative to the ring along a main axis offset from the central axis,
• cavities between the ring and the rotor, a volume of the cavities varying according to an angular position of the rotor relative to the ring,
• an inlet space configured to admit the fluid into the cavities and a discharge space configured to discharge the fluid from the cavities, a pressure in the discharge space being higher than a pressure in the inlet space, the discharge and inlet spaces being radial and passing through the wall, and
• a groove exposing the cavities to the pressure of the discharge space as the rotor rotates and to a pressure of the circuit downstream of the pump, the groove passing radially through the wall and opening into the discharge space.