FIELD: pumps.
SUBSTANCE: group of inventions relates to centrifugal pumps. Impeller (2) for the centrifugal pump including first covering disc (4) having blades (8) and connected by welding to first covering disc (4) second covering disc (6). Each blade (8) has area (12) of the top, in which it contacts with second covering disc (6). At least one blade (8) of all blades (8) on first section (20) of area (12) of the top has a welded joint with second covering disc (6), herewith at least one second section (14) of area (12) of the top is free from the welded joint. One of covering discs (4, 6) is made of a transparent material, and the other of covering discs (4, 6) is made at least partially from a light-absorbing material.
EFFECT: group of inventions is aimed at increasing efficiency of the pump.
11 cl, 4 dwg
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