Rolling-element bearing with seals and purging channel

A rolling-element bearing comprising:

• a first ring assembly and a concentric second ring assembly mounted for rotation relative to the first ring assembly,
• the first ring assembly comprising a first rolling ring having a raceway and a first sealing ring mounted axially to the first rolling ring at a first joint, the first sealing ring supporting a first seal element and a second seal element,
• the second ring assembly comprising a second rolling ring having a raceway and a second sealing ring mounted axially to the second rolling ring at a second joint, and
• a row of rolling elements between the raceway of the first rolling ring and the raceway of the second rolling ring,
• wherein the first seal element includes a first lip in contact with the second sealing ring and the second seal element includes a second lip in contact with the second sealing ring, the first lip and the second lip delimiting a first chamber between the first sealing ring and the second sealing ring,
• wherein a first purging channel extends from a first inlet orifice at the first chamber to at least one external surface of the second ring assembly,
• wherein the at least one external surface of the second ring assembly comprises at least one external surface of the second rolling ring,
• wherein the first sealing ring comprise a first sealing ring section mounted axially against a second sealing ring section, and
• wherein the first seal element is supported by the first sealing ring section and the second seal element is supported by the second sealing ring section.

A rolling-element bearing comprising:

• a first ring assembly and a concentric second ring assembly mounted for rotation relative to the first ring assembly,
• the first ring assembly comprising a first rolling ring having a raceway and a first sealing ring mounted axially to the first rolling ring at a first joint, the first sealing ring supporting a first seal element and a second seal element,
• the second ring assembly comprising a second rolling ring having a raceway and a second sealing ring mounted axially to the second rolling ring at a second joint,
• a row of rolling elements between the raceway of the first rolling ring and the raceway of the second rolling ring, and
• a first rolling ring seal on a first axial side of the row of rolling elements and a second rolling ring seal on a second axial side of the row of rolling elements,
• wherein the first seal element includes a first lip in contact with the second sealing ring and the second seal element includes a second lip in contact with the second sealing ring, the first lip and the second lip delimiting a first chamber between the first sealing ring and the second sealing ring, and
• wherein a first purging channel extends from a first inlet orifice at the first chamber to at least one external surface of the second ring assembly.