DEVICE FOR FIXING PARTS ON A SHAFT OF CENTRIFUGAL PUMP Russian patent published in 2004 - IPC

FIELD: mechanical engineering. SUBSTANCE: on the pump shaft end device has first fixing element in form of bushing connected to the shaft by its inner thread and contacting along one end with a part located on a shaft in front of the bushing, for example, with a working wheel. Device also has second fixing element, located beyond first fixing element relatively to shaft axis. Second fixing element is made in form of cylindrical part, which has external thread, by which is connected to said female bushing, and rests against shaft end by its end. Such construction of device increases friction in threaded connection of bushing and shaft by means of additional stretching forces in this connection, which forces are provided for by stop of second fixing element against pump shaft. At the same time friction along plane of contact of shaft with second fixing element resists loosening thereof. EFFECT: reliable centrifugal pump operation. 3 cl, 2 dwg