PRESSURE STABILIZATION SYSTEM OF CHANNEL FOR COOLING AND LUBRICATING RADIAL-AXIAL BEARING OF MAIN CIRCULATION PUMP Russian patent published in 2016 - IPC F04D29/58 F04D29/06 

FIELD: engines and pumps.

SUBSTANCE: pressure stabilization system for the channel of cooling and lubricating radial-axial bearing of the main circulation pump (MCP) of the reactor contains nitrogen and desalinated water feed systems and surge tank (3). Desalinated water feed pump is connected via pipeline with head MCP chamber, to the upper part of which the drain pipeline is connected, and to lower - pipeline for connection with a channel of MCP bearing cooling and lubrication. Pipeline (11) for filling the tank (3) is equipped with shutoff valve (12) and connected by one end with the lower part of the tank (3) and by other end - with pipeline connecting desalinated water feed pump and head MCP chamber, to which in the area between desalinated water feed pump and pipeline (11) bypass pipeline with bypass valve is connected. Between ends of bypass pipeline there are throttling orifice and check valve are installed. Lower part of the reservoir (3) is connected to drain pipeline (17) with a drain valve (18) connected with pipeline (2) supplying nitrogen. Upper part of the reservoir (3) is connected to extra pipeline (19) connected with pipeline (2). In the section of pipeline (2) between pipelines (17) and (19) there is balanced valve (20). On the pipeline (2) there are three shut-off valves (21, 22, 23). Section of pipeline (2) between second and third valves (22, 23) is connected with air discharge pipeline (24) with shutoff valve (25).

EFFECT: higher reliability of the system operation.

1 cl, 2 dwg