Device for coupling a coolant supply to a roller

A device for coupling a coolant supply to a roller for continuous casting installations, the roller configured to be supplied with a coolant via an axial roller borehole extending at least partially through the roller, the device comprising:

• a stationary pillow block supporting the roller in roller bearings,
• a sealing unit for pressure-tight attachment to the axial roller borehole of the roller journal;
• a pillow block cover attached to the stationary pillow block for covering the axial roller borehole, said pillow block cover being stationary and having at least one coolant duct having a first end fluidly connected to the coolant supply and a second end coupled via the sealing unit to the axial roller borehole;
• and
• a rotatable bush insertable into a seat in the axial roller borehole and secured in the roller borehole for rotation with the roller via a screw-less plug-in connection,
• wherein the sealing unit includes a first sealing element arranged in fixed rotative engagement with the rotatable bush and having a first sealing surface, and a second sealing element having a second sealing surface running on the first sealing surface and supported by or integrated into the stationary pillow block cover, said first and second sealing elements configured as sliding rings running on each other.