NUCLEAR REACTOR CONTROL DRIVE Russian patent published in 2015 - IPC G21C7/00 

FIELD: power industry.

SUBSTANCE: control drive includes an electric motor, a separating electromagnetic coupling, end point sensors, a top bearing, a power nut, a screw, a housing pipe and a tie-rod. The power nut housing is rigidly attached to the tie-rod made in the form of a moved hollow working stock, in which the screw with a no self-breaking thread and a bottom bearing provided with a centring bushing is arranged. The housing pipe is rigidly fixed on the reactor cover and provided from inside at least with two guide projections. The whole drive is provided on the outer side with a tight cap; with that, on the upper flange of the housing pipe there installed is an electric motor with a reduction gear and an electromagnetic brake, a separating electromagnetic coupling, and the top bearing, and on the housing of the power nut there are slots interacting with projections of the housing pipe, which align the power nut and provide the movable hollow working stock with back-and-forth movement.

EFFECT: improvement of vibration characteristics of the drive.

6 cl, 3 dwg