MULTISTAGE HORIZONTAL CENTRIFUGAL PUMP FOR SUPPLY OF FLUID MEDIUM AND METHOD OF ITS REPAIR Russian patent published in 2020 - IPC F04D1/06 F04D29/66 F04D29/12 F04D29/16 F04D29/62 

FIELD: engines and pumps.

SUBSTANCE: group of inventions relates to multistage horizontal centrifugal pump and method of its repair. Said pump comprises rotor (6, 32) including rotary shaft (6) and multiple fluid feed wheels (32) and stator (31, 33), it comprises multiple stages bodies (31) arranged in series one by one with respect to axial direction defined by central axis (A). Each wheel (32) is located in a rotary manner on shaft (6). Stator (31, 33) includes rotor (6, 32). Each housing (31) is made and located centrally with respect to central axis (A). Between rotor (6, 32) and stator (31, 33) there are multiple compensating rings (7, 8), and each ring (7, 8) is fixed relative to stator (31, 33), and surrounds rotor (6, 32) with clearance (S1, S2). At least one ring (7, 8) is eccentric and monolithic, and each stage housing is separate from each other stage housing.

EFFECT: inventions are aimed at creation of pump, in which contact between compensation rings is reliably prevented in all normal operating conditions without loss of efficiency.

15 cl, 7 dwg