Geared fluid machine with circumferential seal having first and second spaced apart seal limbs

A geared fluid machine comprising:

• a machine housing;
• and
• a first gearwheel and a second gearwheel meshing with the first gearwheel, the first gearwheel and the second gearwheel each rotatably mounted in the machine housing with respect to a respective axis of rotation;
• at least one axial washer arranged in the machine housing with axial play, the at least one axial washer having a first washer side facing away from the first and second gearwheels;
• and
• a circumferential seal surrounding a pressure field and contacting and sealing against a first bearing surface of the at least one axial washer on a first seal side of the circumferential seal, the circumferential seal including a second seal side contacting and sealing against a second bearing surface of the machine housing, the circumferential seal being at least partially U-shaped in section, and having first and second spaced apart seal limbs, the first seal limb lying against the first bearing surface, the second seal limb lying against the second bearing surface, the circumferential seal further including a connecting limb connecting the first seal limb and the second seal limb,
• wherein the circumferential seal, in section, is symmetric with respect to a symmetry plane extending through the connecting limb at a distance from the first and second seal limbs, and wherein each of the first and second seal limbs, in section, is delimited on an inner surface facing the other of the first and second seal limbs by a first imaginary line, and on an outer surface facing away from the other of the first and second seal limbs by a second imaginary line, wherein the first imaginary line and the second imaginary line are angled toward each other when the seal is in a relaxed state.