Water-conducting household appliance having a rotatable component

A bearing device comprising:

• a stationary component;
• a metallic bearing;
• a rotatable component rotatably mounted on the stationary component by the metallic bearing;
• a shaft connected to the rotatable component, the shaft having a shaft contact surface;
• a seal comprising a seal contact surface in contact with the shaft contact surface, wherein the shaft is rotatable relative to the seal such that the seal contact surface slides on the shaft contact surface;
• and
• a pump structured to convey liquid from an intermediate space between the seal contact surface and the shaft contact surface in an axial direction of the rotatable component upon rotation of the rotatable component,
• wherein the pump further comprises a plurality of elements provided on at least one of the shaft contact surface and the seal contact surface,
• wherein each of the plurality of elements comprises two radial walls converging toward one another in the axial direction of the rotatable component,
• wherein the plurality of elements are arranged in at least two rows adjacent one another, and
• wherein the plurality of elements in each row of the at least two rows are staggered relative to the plurality of elements in each adjacent row.

A water-conducting household appliance comprising:

• a liquid chamber;
• a stationary component;
• a metallic bearing;
• a rotatable component rotatably mounted on the stationary component of the household appliance by the metallic bearing;
• a shaft connected to the rotatable component;
• a seal that seals the metallic bearing from the liquid chamber, the seal comprising a seal contact surface in contact with a shaft contact surface of the shaft, wherein the shaft is rotatable relative to the seal and the seal contact surface slides on the shaft contact surface;
• and
• a pump on the contact surface of the shaft that conveys liquid from an intermediate space between contact surfaces to the liquid chamber upon rotation of the rotatable component,
• wherein the pump comprises a plurality of elements provided on at least one of the shaft contact surface and the seal contact surface,
• wherein the pump comprises guides between the plurality of elements that guide the liquid to the liquid chamber, and
• wherein the plurality of elements comprises at least two rows of annularly, peripherally distributed elements and wherein one of the at least two rows is staggered relative to the other of the at least two rows.