HYDRAULIC LOCK DEVICE FOR PROTECTION AGAINST INGRESS OF NITROGEN IN RADIAL-AXIAL BEARING OF MAIN CIRCULATION PUMP Russian patent published in 2016 - IPC F04D29/06 F04D29/58 

FIELD: engines and pumps.

SUBSTANCE: hydraulic lock device for protection against ingress of nitrogen in radial-axial bearing of main circulation pump of the reactor comprises tank-stabiliser, a pipeline for filling tank desalted water with shutoff valve and drain pipeline with drain valve connected to the lower part of the tank-stabiliser, nitrogen supply pipeline connected with drain pipeline. Upper part of the tank-stabiliser is connected with additional pipeline connected with nitrogen feed pipeline. In the section of nitrogen supply pipeline between drain pipeline and additional pipeline there is balanced valve. On nitrogen supply pipeline there are three shut-off valves. Section of nitrogen supply pipeline between second and third shut-off valves is connected with air discharge pipeline equipped with shutoff valve.

EFFECT: invention is aimed at improving operating reliability of system stabilising pressure in the circuit of cooling and lubricating radial-axial bearing of the main circulation pump of the reactor.

1 cl, 1 dwg