FIELD: machine building.
SUBSTANCE: invention relates to the journal roller bearing intended for use in any rotating machine requiring directing of rotation of the rotating parts using the journal roller bearing. In particular the invention is used in the journal roller bearings of the motors. For example, traction motors of the controlled vehicle, such as railroad transport. The protection device, in particular thermal protection and/or protection against surface-leak currents of the journal roller bearing (P) installed on the motor shaft (A), contains a ring (B) located between the shaft and the journal roller bearing, and isolated from the shaft by means of the dielectric coating (19). The dielectric coating (19) is applied at least on the surface (20, 21) of the ring (B) intended for contact with shaft (A).
EFFECT: assurance of prevention or deaccelerated premature wear and tear of the journal roller bearing, in particular linked with action of the surface-leak currents.
15 cl, 2 dwg
