Abstract: A bearing device for a solar power plant unit includes at least one support element, at least one first roller and at least one second roller. At least one first roller bearing unit is movably supported on the support element and rotatably supports the at least one first roller and the one second roller. At least one first spherical plain bearing having an outer ring is attached to the at least one first roller. A solar power plant includes at least one mirror movably supported by at least one such bearing device.

Abstract: A parabolic-trough solar power plant includes at least one solar panel that has a shaft part supported by at least one bearing assembly configured to pivot the solar panel through a pivot angle about the longitudinal axis. The bearing assembly includes a support element with two support sections and a space therebetween, a chain element supported by the support sections, and a plurality of roller elements supported in the chain element along its longitudinal extension for rotation about an axis of rotation parallel to the longitudinal axis. Ends of the chain element are attached to the support sections by bearings that permit pivoting of the chain element relative to the support sections about a compensation axis horizontal, and in projection, perpendicular to the longitudinal axis of the shaft part. The roller elements are disposed at hinge points between pairs of the links in the chain.

Abstract: A bearing device for a solar power plant unit includes at least one support element, at least one first roller and at least one second roller. At least one first roller bearing unit is movably supported on the support element and rotatably supports the at least one first roller and the one second roller. At least one first spherical plain bearing having an outer ring is attached to the at least one first roller. A solar power plant includes at least one mirror movably supported by at least one such bearing device.

Abstract: A roller bearing for at least one set of roller bodies, which are disposed in an annular manner, the roller bearing having at least one track element with a track, on which the roller bodies are provided for rolling, includes the following features:—The track comprises a track base having a circular circumferential line,—the track element comprises, on each axial side of the track base, a shoulder or a rim for the roller bodies, each shoulder or rim having a circular circumferential line, and—the track element is formed such that, as viewed perpendicular to the planes defined by the circumferential lines, all center points of the three circumferential lines are different from each other.