A Canned Pump with Forced Cooling and Lubricating Function

Abstract

The invention provides a shield pump with forced cooling and lubricating functions. A front bearing pedestal and a rear sliding bearing pedestal are each provided with two through holes. A gap is reserved between a front thrust disc and a front sliding bearing, and a gap is reserved between a rear thrust disc and a rear sliding bearing. The center of a shaft, the center of an impeller nut and the center of a nut are provided with through holes. Part of conveying medium from an impeller can flow past the inner side, the outer side and the end of the front sliding bearing, and then the conveying medium enters the impeller via a pressure relief opening of the impeller to form a liquid flow channel. Meanwhile, part of the conveying medium flows past the front sliding bearing pedestal, the inner side gap of a shield sleeve and the inner side, the outer side and the end of the rear sliding bearing, and then returns to an impeller inlet from the through hole in the center of the nut, the through hole in the center of the shaft and the through hole in the center of the impeller nut to form a loop. The rear sliding bearing, a second shaft sleeve and the rear thrust disc are effectively cooled and lubricated, the reliability of the shield pump is improved and the service life of the shield pump is prolonged.

Description

technical field [0001] The invention relates to a canned pump, in particular to a canned pump with forced cooling and lubricating functions. Background technique [0002] The canned pump is a shaft sealless pump. The rotor of the motor and the impeller of the pump are fixed on the same shaft. The rotor of the motor is separated from the stator by the shielding sleeve. The auxiliary shield is in the shielding sleeve, and the heat dissipation conditions are poor, especially the high-power high-speed shielded pump generates a lot of heat, which may easily cause the motor winding to burn or the friction pair to wear. Contents of the invention [0003] In order to overcome the problems of large internal heat generation of high-power and high-speed canned pumps, easy burning of motor windings and easy wear of friction pairs, the invention proposes a canned pump with forced cooling and lubricating functions. There are through holes in the front and rear bearing seats and the cen...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of large internal heat generation of high-power and high-speed shielded pumps, easy burning of motor windings and easy wear of friction pairs, the invention proposes a shielded pump with forced cooling and lubrication function

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