Rolling-element bearing unit
View Patent ↗The invention relates to a rolling-element bearing unit for rotatably bearing two components, nested into each other, which rotate about separate rotational axes that are at an angle to each other, especially the roll core and roll sleeve of a width stretching roll for a paper machine. The rolling-element bearing unit according to the invention comprises an outer rolling-element bearing for rotationally bearing the outer component, a pivoting bearing carrying the outer rolling-element bearing and allowing adjustment of the angle of the outer rolling-element bearing, an angularly adjustable inner rolling-element bearing for rotationally bearing the inner component, and an eccentric which consist of an inner and an outer eccentric ring via which eccentric rings the centers of the two rolling-element bearings can be adjusted in relation to each other.
1. A rolling-element bearing unit for a rotary mounting of two components, a roll core and a roll casing of a width-stretching roll for a paper machine, which are arranged one in the other and are rotatable about separate axes of rotation standing at a angle to one another, comprising:
an outer rolling-element bearing for the rotary mounting of an outer component,
a pivot bearing which allows angular adjustment of the outer rolling-element bearing and which carries the outer rolling-element bearing,
an angularly adjustable inner rolling-element bearing for the rotary mounting of an inner component, and
an eccentric, consisting of an inner eccentric ring and of an outer eccentric ring, via which eccentric rings center points of the outer rolling-element bearing and the inner-rolling element bearing can be adjusted in relation to one another.
2. The rolling-element bearing unit as claimed in claim 1 , wherein an outside of the outer eccentric ring and an inside of an inner ring of the outer rolling-element bearing are profiled as a spherical segment so as to form the pivot bearing and engage one in the other.
3. The rolling-element bearing unit as claimed in claim 1 , wherein an inside of the outer eccentric ring and an outside of the inner eccentric ring are profiled as a spherical segment so as to form the pivot bearing and engage one in the other.
4. The rolling-element bearing unit as claimed in claim 1 , wherein the outer rolling-element bearing is a two-row cylindrical roller bearing.
5. The rolling-element bearing unit as claimed in claim 1 , wherein the inner rolling-element bearing is a self-aligning roller bearing.