Cooling of rolls in continuous casting plants

1. A roller device, which consists of a right bearing housing, a left bearing housing and a roller, which is rotatably supported by journals in the bearing housings in continuous casting plants, in which a cooling medium is passed through an axial bore in the roller, and bores, which form a closed cavity, are arranged around bearings mounted in each of the bearing housings wherein a cooling medium inlet is provided in a first of the bearing housings, and a discharge bore for the cooling medium, which is arranged on an end face of a second of the bearing housings is located next to a bearing cover so that the cooling medium flows into the inlet in the first bearing housing, through the axial bore in the roller and out the discharge bore in the second bearing housing.

2. The roller device in accordance with claim 1 , wherein a rotary passage, which is arranged centrally in the bearing cover, is connected by a rigid or flexible connector with the discharge bore on the end face of the second bearing housing.

3. The roller device in accordance with claim 2 , wherein the rotary passage is detachably connected with the bearing cover.

4. The roller device in accordance with claim 2 , wherein the rotary passage in the bearing cover can compensate linear expansion of the roller.